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 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 for (unsigned int i
= 0;
2205 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2208 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2209 thread_safe
= sym
!= NULL
&& sym
->in_reg() && sym
->in_real_elf();
2214 this->plt_thread_safe_
= thread_safe
;
2215 this->group_sections(layout
, task
);
2218 // We need address of stub tables valid for make_stub.
2219 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2220 p
!= this->stub_tables_
.end();
2223 const Powerpc_relobj
<size
, big_endian
>* object
2224 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2225 Address off
= object
->get_output_section_offset((*p
)->shndx());
2226 gold_assert(off
!= invalid_address
);
2227 Output_section
* os
= (*p
)->output_section();
2228 (*p
)->set_address_and_size(os
, off
);
2233 // Clear plt call stubs, long branch stubs and branch lookup table.
2234 prev_brlt_size
= this->branch_lookup_table_
.size();
2235 this->branch_lookup_table_
.clear();
2236 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2237 p
!= this->stub_tables_
.end();
2240 (*p
)->clear_stubs();
2244 // Build all the stubs.
2245 Stub_table
<size
, big_endian
>* ifunc_stub_table
2246 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2247 Stub_table
<size
, big_endian
>* one_stub_table
2248 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2249 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2250 b
!= this->branch_info_
.end();
2253 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2256 // Did anything change size?
2257 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2258 bool again
= num_huge_branches
!= prev_brlt_size
;
2259 if (size
== 64 && num_huge_branches
!= 0)
2260 this->make_brlt_section(layout
);
2261 if (size
== 64 && again
)
2262 this->brlt_section_
->set_current_size(num_huge_branches
);
2264 typedef Unordered_set
<Output_section
*> Output_sections
;
2265 Output_sections os_need_update
;
2266 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2267 p
!= this->stub_tables_
.end();
2270 if ((*p
)->size_update())
2273 os_need_update
.insert((*p
)->output_section());
2277 // Set output section offsets for all input sections in an output
2278 // section that just changed size. Anything past the stubs will
2280 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2281 p
!= os_need_update
.end();
2284 Output_section
* os
= *p
;
2286 typedef Output_section::Input_section_list Input_section_list
;
2287 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2288 i
!= os
->input_sections().end();
2291 off
= align_address(off
, i
->addralign());
2292 if (i
->is_input_section() || i
->is_relaxed_input_section())
2293 i
->relobj()->set_section_offset(i
->shndx(), off
);
2294 if (i
->is_relaxed_input_section())
2296 Stub_table
<size
, big_endian
>* stub_table
2297 = static_cast<Stub_table
<size
, big_endian
>*>(
2298 i
->relaxed_input_section());
2299 off
+= stub_table
->set_address_and_size(os
, off
);
2302 off
+= i
->data_size();
2304 // If .brlt is part of this output section, then we have just
2305 // done the offset adjustment.
2306 os
->clear_section_offsets_need_adjustment();
2311 && num_huge_branches
!= 0
2312 && parameters
->options().output_is_position_independent())
2314 // Fill in the BRLT relocs.
2315 this->brlt_section_
->reset_data_size();
2316 for (typename
Branch_lookup_table::const_iterator p
2317 = this->branch_lookup_table_
.begin();
2318 p
!= this->branch_lookup_table_
.end();
2321 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2323 this->brlt_section_
->finalize_data_size();
2328 // A class to handle the PLT data.
2330 template<int size
, bool big_endian
>
2331 class Output_data_plt_powerpc
: public Output_section_data_build
2334 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2335 size
, big_endian
> Reloc_section
;
2337 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2338 Reloc_section
* plt_rel
,
2339 unsigned int reserved_size
,
2341 : Output_section_data_build(size
== 32 ? 4 : 8),
2344 initial_plt_entry_size_(reserved_size
),
2348 // Add an entry to the PLT.
2353 add_ifunc_entry(Symbol
*);
2356 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2358 // Return the .rela.plt section data.
2365 // Return the number of PLT entries.
2369 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2373 // Return the offset of the first non-reserved PLT entry.
2375 first_plt_entry_offset()
2376 { return this->initial_plt_entry_size_
; }
2378 // Return the size of a PLT entry.
2380 get_plt_entry_size()
2381 { return plt_entry_size
; }
2385 do_adjust_output_section(Output_section
* os
)
2390 // Write to a map file.
2392 do_print_to_mapfile(Mapfile
* mapfile
) const
2393 { mapfile
->print_output_data(this, this->name_
); }
2396 // The size of an entry in the PLT.
2397 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2399 // Write out the PLT data.
2401 do_write(Output_file
*);
2403 // The reloc section.
2404 Reloc_section
* rel_
;
2405 // Allows access to .glink for do_write.
2406 Target_powerpc
<size
, big_endian
>* targ_
;
2407 // The size of the first reserved entry.
2408 int initial_plt_entry_size_
;
2409 // What to report in map file.
2413 // Add an entry to the PLT.
2415 template<int size
, bool big_endian
>
2417 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2419 if (!gsym
->has_plt_offset())
2421 section_size_type off
= this->current_data_size();
2423 off
+= this->first_plt_entry_offset();
2424 gsym
->set_plt_offset(off
);
2425 gsym
->set_needs_dynsym_entry();
2426 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2427 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2428 off
+= plt_entry_size
;
2429 this->set_current_data_size(off
);
2433 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2435 template<int size
, bool big_endian
>
2437 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2439 if (!gsym
->has_plt_offset())
2441 section_size_type off
= this->current_data_size();
2442 gsym
->set_plt_offset(off
);
2443 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2445 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2446 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2447 off
+= plt_entry_size
;
2448 this->set_current_data_size(off
);
2452 // Add an entry for a local ifunc symbol to the IPLT.
2454 template<int size
, bool big_endian
>
2456 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2457 Sized_relobj_file
<size
, big_endian
>* relobj
,
2458 unsigned int local_sym_index
)
2460 if (!relobj
->local_has_plt_offset(local_sym_index
))
2462 section_size_type off
= this->current_data_size();
2463 relobj
->set_local_plt_offset(local_sym_index
, off
);
2464 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2466 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2467 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2469 off
+= plt_entry_size
;
2470 this->set_current_data_size(off
);
2474 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2475 static const uint32_t add_2_2_11
= 0x7c425a14;
2476 static const uint32_t add_3_3_2
= 0x7c631214;
2477 static const uint32_t add_3_3_13
= 0x7c636a14;
2478 static const uint32_t add_11_0_11
= 0x7d605a14;
2479 static const uint32_t add_12_2_11
= 0x7d825a14;
2480 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2481 static const uint32_t addi_11_11
= 0x396b0000;
2482 static const uint32_t addi_12_12
= 0x398c0000;
2483 static const uint32_t addi_2_2
= 0x38420000;
2484 static const uint32_t addi_3_2
= 0x38620000;
2485 static const uint32_t addi_3_3
= 0x38630000;
2486 static const uint32_t addis_0_2
= 0x3c020000;
2487 static const uint32_t addis_0_13
= 0x3c0d0000;
2488 static const uint32_t addis_11_11
= 0x3d6b0000;
2489 static const uint32_t addis_11_30
= 0x3d7e0000;
2490 static const uint32_t addis_12_12
= 0x3d8c0000;
2491 static const uint32_t addis_12_2
= 0x3d820000;
2492 static const uint32_t addis_3_2
= 0x3c620000;
2493 static const uint32_t addis_3_13
= 0x3c6d0000;
2494 static const uint32_t b
= 0x48000000;
2495 static const uint32_t bcl_20_31
= 0x429f0005;
2496 static const uint32_t bctr
= 0x4e800420;
2497 static const uint32_t blr
= 0x4e800020;
2498 static const uint32_t blrl
= 0x4e800021;
2499 static const uint32_t bnectr_p4
= 0x4ce20420;
2500 static const uint32_t cmpldi_2_0
= 0x28220000;
2501 static const uint32_t cror_15_15_15
= 0x4def7b82;
2502 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2503 static const uint32_t ld_0_1
= 0xe8010000;
2504 static const uint32_t ld_0_12
= 0xe80c0000;
2505 static const uint32_t ld_11_12
= 0xe96c0000;
2506 static const uint32_t ld_11_2
= 0xe9620000;
2507 static const uint32_t ld_2_1
= 0xe8410000;
2508 static const uint32_t ld_2_11
= 0xe84b0000;
2509 static const uint32_t ld_2_12
= 0xe84c0000;
2510 static const uint32_t ld_2_2
= 0xe8420000;
2511 static const uint32_t lfd_0_1
= 0xc8010000;
2512 static const uint32_t li_0_0
= 0x38000000;
2513 static const uint32_t li_12_0
= 0x39800000;
2514 static const uint32_t lis_0_0
= 0x3c000000;
2515 static const uint32_t lis_11
= 0x3d600000;
2516 static const uint32_t lis_12
= 0x3d800000;
2517 static const uint32_t lwz_0_12
= 0x800c0000;
2518 static const uint32_t lwz_11_11
= 0x816b0000;
2519 static const uint32_t lwz_11_30
= 0x817e0000;
2520 static const uint32_t lwz_12_12
= 0x818c0000;
2521 static const uint32_t lwzu_0_12
= 0x840c0000;
2522 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2523 static const uint32_t mflr_0
= 0x7c0802a6;
2524 static const uint32_t mflr_11
= 0x7d6802a6;
2525 static const uint32_t mflr_12
= 0x7d8802a6;
2526 static const uint32_t mtctr_0
= 0x7c0903a6;
2527 static const uint32_t mtctr_11
= 0x7d6903a6;
2528 static const uint32_t mtctr_12
= 0x7d8903a6;
2529 static const uint32_t mtlr_0
= 0x7c0803a6;
2530 static const uint32_t mtlr_12
= 0x7d8803a6;
2531 static const uint32_t nop
= 0x60000000;
2532 static const uint32_t ori_0_0_0
= 0x60000000;
2533 static const uint32_t std_0_1
= 0xf8010000;
2534 static const uint32_t std_0_12
= 0xf80c0000;
2535 static const uint32_t std_2_1
= 0xf8410000;
2536 static const uint32_t stfd_0_1
= 0xd8010000;
2537 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2538 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2539 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2541 // Write out the PLT.
2543 template<int size
, bool big_endian
>
2545 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2549 const section_size_type offset
= this->offset();
2550 const section_size_type oview_size
2551 = convert_to_section_size_type(this->data_size());
2552 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2553 unsigned char* pov
= oview
;
2554 unsigned char* endpov
= oview
+ oview_size
;
2556 // The address of the .glink branch table
2557 const Output_data_glink
<size
, big_endian
>* glink
2558 = this->targ_
->glink_section();
2559 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2561 while (pov
< endpov
)
2563 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2568 of
->write_output_view(offset
, oview_size
, oview
);
2572 // Create the PLT section.
2574 template<int size
, bool big_endian
>
2576 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2579 if (this->plt_
== NULL
)
2581 if (this->got_
== NULL
)
2582 this->got_section(symtab
, layout
);
2584 if (this->glink_
== NULL
)
2585 make_glink_section(layout
);
2587 // Ensure that .rela.dyn always appears before .rela.plt This is
2588 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2589 // needs to include .rela.plt in it's range.
2590 this->rela_dyn_section(layout
);
2592 Reloc_section
* plt_rel
= new Reloc_section(false);
2593 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2594 elfcpp::SHF_ALLOC
, plt_rel
,
2595 ORDER_DYNAMIC_PLT_RELOCS
, false);
2597 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2598 size
== 32 ? 0 : 24,
2600 layout
->add_output_section_data(".plt",
2602 ? elfcpp::SHT_PROGBITS
2603 : elfcpp::SHT_NOBITS
),
2604 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2613 // Create the IPLT section.
2615 template<int size
, bool big_endian
>
2617 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2620 if (this->iplt_
== NULL
)
2622 this->make_plt_section(symtab
, layout
);
2624 Reloc_section
* iplt_rel
= new Reloc_section(false);
2625 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2627 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2629 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2633 // A section for huge long branch addresses, similar to plt section.
2635 template<int size
, bool big_endian
>
2636 class Output_data_brlt_powerpc
: public Output_section_data_build
2639 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2640 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2641 size
, big_endian
> Reloc_section
;
2643 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2644 Reloc_section
* brlt_rel
)
2645 : Output_section_data_build(size
== 32 ? 4 : 8),
2650 // Add a reloc for an entry in the BRLT.
2652 add_reloc(Address to
, unsigned int off
)
2653 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
2655 // Update section and reloc section size.
2657 set_current_size(unsigned int num_branches
)
2659 this->reset_address_and_file_offset();
2660 this->set_current_data_size(num_branches
* 16);
2661 this->finalize_data_size();
2662 Output_section
* os
= this->output_section();
2663 os
->set_section_offsets_need_adjustment();
2664 if (this->rel_
!= NULL
)
2666 unsigned int reloc_size
2667 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
2668 this->rel_
->reset_address_and_file_offset();
2669 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
2670 this->rel_
->finalize_data_size();
2671 Output_section
* os
= this->rel_
->output_section();
2672 os
->set_section_offsets_need_adjustment();
2678 do_adjust_output_section(Output_section
* os
)
2683 // Write to a map file.
2685 do_print_to_mapfile(Mapfile
* mapfile
) const
2686 { mapfile
->print_output_data(this, "** BRLT"); }
2689 // Write out the BRLT data.
2691 do_write(Output_file
*);
2693 // The reloc section.
2694 Reloc_section
* rel_
;
2695 Target_powerpc
<size
, big_endian
>* targ_
;
2698 // Make the branch lookup table section.
2700 template<int size
, bool big_endian
>
2702 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
2704 if (size
== 64 && this->brlt_section_
== NULL
)
2706 Reloc_section
* brlt_rel
= NULL
;
2707 bool is_pic
= parameters
->options().output_is_position_independent();
2710 // When PIC we can't fill in .brlt (like .plt it can be a
2711 // bss style section) but must initialise at runtime via
2712 // dynamic relocats.
2713 this->rela_dyn_section(layout
);
2714 brlt_rel
= new Reloc_section(false);
2715 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
2718 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
2719 if (this->plt_
&& is_pic
)
2720 this->plt_
->output_section()
2721 ->add_output_section_data(this->brlt_section_
);
2723 layout
->add_output_section_data(".brlt",
2724 (is_pic
? elfcpp::SHT_NOBITS
2725 : elfcpp::SHT_PROGBITS
),
2726 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2727 this->brlt_section_
,
2728 (is_pic
? ORDER_SMALL_BSS
2729 : ORDER_SMALL_DATA
),
2734 // Write out .brlt when non-PIC.
2736 template<int size
, bool big_endian
>
2738 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2740 if (size
== 64 && !parameters
->options().output_is_position_independent())
2742 const section_size_type offset
= this->offset();
2743 const section_size_type oview_size
2744 = convert_to_section_size_type(this->data_size());
2745 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2747 this->targ_
->write_branch_lookup_table(oview
);
2748 of
->write_output_view(offset
, oview_size
, oview
);
2752 static inline uint32_t
2758 static inline uint32_t
2764 static inline uint32_t
2767 return hi(a
+ 0x8000);
2770 template<bool big_endian
>
2772 write_insn(unsigned char* p
, uint32_t v
)
2774 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2777 // Stub_table holds information about plt and long branch stubs.
2778 // Stubs are built in an area following some input section determined
2779 // by group_sections(). This input section is converted to a relaxed
2780 // input section allowing it to be resized to accommodate the stubs
2782 template<int size
, bool big_endian
>
2783 class Stub_table
: public Output_relaxed_input_section
2786 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2787 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2789 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
2790 : Output_relaxed_input_section(NULL
, 0, 0),
2791 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
2792 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2793 branch_size_(0), last_branch_size_(0)
2796 // Delayed Output_relaxed_input_section init.
2798 init(const Output_section::Input_section
*, Output_section
*);
2800 // Add a plt call stub.
2802 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2808 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2813 // Find a given plt call stub.
2815 find_plt_call_entry(const Symbol
*) const;
2818 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2819 unsigned int) const;
2822 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2828 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2833 // Add a long branch stub.
2835 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2838 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2843 this->plt_call_stubs_
.clear();
2844 this->plt_size_
= 0;
2845 this->long_branch_stubs_
.clear();
2846 this->branch_size_
= 0;
2850 set_address_and_size(const Output_section
* os
, Address off
)
2852 Address start_off
= off
;
2853 off
+= this->orig_data_size_
;
2854 Address my_size
= this->plt_size_
+ this->branch_size_
;
2856 off
= align_address(off
, this->stub_align());
2857 // Include original section size and alignment padding in size
2858 my_size
+= off
- start_off
;
2859 this->reset_address_and_file_offset();
2860 this->set_current_data_size(my_size
);
2861 this->set_address_and_file_offset(os
->address() + start_off
,
2862 os
->offset() + start_off
);
2869 return align_address(this->address() + this->orig_data_size_
,
2870 this->stub_align());
2876 return align_address(this->offset() + this->orig_data_size_
,
2877 this->stub_align());
2882 { return this->plt_size_
; }
2887 Output_section
* os
= this->output_section();
2888 if (os
->addralign() < this->stub_align())
2890 os
->set_addralign(this->stub_align());
2891 // FIXME: get rid of the insane checkpointing.
2892 // We can't increase alignment of the input section to which
2893 // stubs are attached; The input section may be .init which
2894 // is pasted together with other .init sections to form a
2895 // function. Aligning might insert zero padding resulting in
2896 // sigill. However we do need to increase alignment of the
2897 // output section so that the align_address() on offset in
2898 // set_address_and_size() adds the same padding as the
2899 // align_address() on address in stub_address().
2900 // What's more, we need this alignment for the layout done in
2901 // relaxation_loop_body() so that the output section starts at
2902 // a suitably aligned address.
2903 os
->checkpoint_set_addralign(this->stub_align());
2905 if (this->last_plt_size_
!= this->plt_size_
2906 || this->last_branch_size_
!= this->branch_size_
)
2908 this->last_plt_size_
= this->plt_size_
;
2909 this->last_branch_size_
= this->branch_size_
;
2915 Target_powerpc
<size
, big_endian
>*
2921 class Plt_stub_ent_hash
;
2922 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
2923 Plt_stub_ent_hash
> Plt_stub_entries
;
2925 // Alignment of stub section.
2931 unsigned int min_align
= 32;
2932 unsigned int user_align
= 1 << parameters
->options().plt_align();
2933 return std::max(user_align
, min_align
);
2936 // Size of a given plt call stub.
2938 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
2943 Address pltaddr
= p
->second
;
2944 if (p
->first
.sym_
== NULL
2945 || (p
->first
.sym_
->type() == elfcpp::STT_GNU_IFUNC
2946 && p
->first
.sym_
->can_use_relative_reloc(false)))
2947 pltaddr
+= this->targ_
->iplt_section()->address();
2949 pltaddr
+= this->targ_
->plt_section()->address();
2950 Address tocbase
= this->targ_
->got_section()->output_section()->address();
2951 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2952 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
2953 tocbase
+= ppcobj
->toc_base_offset();
2954 Address off
= pltaddr
- tocbase
;
2955 bool static_chain
= parameters
->options().plt_static_chain();
2956 bool thread_safe
= this->targ_
->plt_thread_safe();
2957 unsigned int bytes
= (4 * 5
2960 + 4 * (ha(off
) != 0)
2961 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
2962 unsigned int align
= 1 << parameters
->options().plt_align();
2964 bytes
= (bytes
+ align
- 1) & -align
;
2968 // Return long branch stub size.
2970 branch_stub_size(Address to
)
2973 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
2974 if (to
- loc
+ (1 << 25) < 2 << 25)
2976 if (size
== 64 || !parameters
->options().output_is_position_independent())
2983 do_write(Output_file
*);
2985 // Plt call stub keys.
2989 Plt_stub_ent(const Symbol
* sym
)
2990 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2993 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2994 unsigned int locsym_index
)
2995 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2998 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3000 unsigned int r_type
,
3002 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3005 this->addend_
= addend
;
3006 else if (parameters
->options().output_is_position_independent()
3007 && r_type
== elfcpp::R_PPC_PLTREL24
)
3009 this->addend_
= addend
;
3010 if (this->addend_
>= 32768)
3011 this->object_
= object
;
3015 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3016 unsigned int locsym_index
,
3017 unsigned int r_type
,
3019 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3022 this->addend_
= addend
;
3023 else if (parameters
->options().output_is_position_independent()
3024 && r_type
== elfcpp::R_PPC_PLTREL24
)
3025 this->addend_
= addend
;
3028 bool operator==(const Plt_stub_ent
& that
) const
3030 return (this->sym_
== that
.sym_
3031 && this->object_
== that
.object_
3032 && this->addend_
== that
.addend_
3033 && this->locsym_
== that
.locsym_
);
3037 const Sized_relobj_file
<size
, big_endian
>* object_
;
3038 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3039 unsigned int locsym_
;
3042 class Plt_stub_ent_hash
3045 size_t operator()(const Plt_stub_ent
& ent
) const
3047 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3048 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3054 // Long branch stub keys.
3055 class Branch_stub_ent
3058 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3059 : dest_(to
), toc_base_off_(0)
3062 toc_base_off_
= obj
->toc_base_offset();
3065 bool operator==(const Branch_stub_ent
& that
) const
3067 return (this->dest_
== that
.dest_
3069 || this->toc_base_off_
== that
.toc_base_off_
));
3073 unsigned int toc_base_off_
;
3076 class Branch_stub_ent_hash
3079 size_t operator()(const Branch_stub_ent
& ent
) const
3080 { return ent
.dest_
^ ent
.toc_base_off_
; }
3083 // In a sane world this would be a global.
3084 Target_powerpc
<size
, big_endian
>* targ_
;
3085 // Map sym/object/addend to stub offset.
3086 Plt_stub_entries plt_call_stubs_
;
3087 // Map destination address to stub offset.
3088 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3089 Branch_stub_ent_hash
> Branch_stub_entries
;
3090 Branch_stub_entries long_branch_stubs_
;
3091 // size of input section
3092 section_size_type orig_data_size_
;
3094 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3097 // Make a new stub table, and record.
3099 template<int size
, bool big_endian
>
3100 Stub_table
<size
, big_endian
>*
3101 Target_powerpc
<size
, big_endian
>::new_stub_table()
3103 Stub_table
<size
, big_endian
>* stub_table
3104 = new Stub_table
<size
, big_endian
>(this);
3105 this->stub_tables_
.push_back(stub_table
);
3109 // Delayed stub table initialisation, because we create the stub table
3110 // before we know to which section it will be attached.
3112 template<int size
, bool big_endian
>
3114 Stub_table
<size
, big_endian
>::init(
3115 const Output_section::Input_section
* owner
,
3116 Output_section
* output_section
)
3118 this->set_relobj(owner
->relobj());
3119 this->set_shndx(owner
->shndx());
3120 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3121 this->set_output_section(output_section
);
3122 this->orig_data_size_
= owner
->current_data_size();
3124 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3125 new_relaxed
.push_back(this);
3126 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3129 // Add a plt call stub, if we do not already have one for this
3130 // sym/object/addend combo.
3132 template<int size
, bool big_endian
>
3134 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3135 const Sized_relobj_file
<size
, big_endian
>* object
,
3137 unsigned int r_type
,
3140 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3141 Address off
= this->plt_size_
;
3142 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3143 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3145 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3148 template<int size
, bool big_endian
>
3150 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3151 const Sized_relobj_file
<size
, big_endian
>* object
,
3152 unsigned int locsym_index
,
3153 unsigned int r_type
,
3156 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3157 Address off
= this->plt_size_
;
3158 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3159 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3161 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3164 // Find a plt call stub.
3166 template<int size
, bool big_endian
>
3167 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3168 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3169 const Sized_relobj_file
<size
, big_endian
>* object
,
3171 unsigned int r_type
,
3172 Address addend
) const
3174 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3175 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3176 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3179 template<int size
, bool big_endian
>
3180 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3181 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3183 Plt_stub_ent
ent(gsym
);
3184 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3185 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3188 template<int size
, bool big_endian
>
3189 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3190 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3191 const Sized_relobj_file
<size
, big_endian
>* object
,
3192 unsigned int locsym_index
,
3193 unsigned int r_type
,
3194 Address addend
) const
3196 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3197 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3198 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3201 template<int size
, bool big_endian
>
3202 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3203 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3204 const Sized_relobj_file
<size
, big_endian
>* object
,
3205 unsigned int locsym_index
) const
3207 Plt_stub_ent
ent(object
, locsym_index
);
3208 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3209 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3212 // Add a long branch stub if we don't already have one to given
3215 template<int size
, bool big_endian
>
3217 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3218 const Powerpc_relobj
<size
, big_endian
>* object
,
3221 Branch_stub_ent
ent(object
, to
);
3222 Address off
= this->branch_size_
;
3223 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3225 unsigned int stub_size
= this->branch_stub_size(to
);
3226 this->branch_size_
= off
+ stub_size
;
3227 if (size
== 64 && stub_size
!= 4)
3228 this->targ_
->add_branch_lookup_table(to
);
3232 // Find long branch stub.
3234 template<int size
, bool big_endian
>
3235 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3236 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3237 const Powerpc_relobj
<size
, big_endian
>* object
,
3240 Branch_stub_ent
ent(object
, to
);
3241 typename
Branch_stub_entries::const_iterator p
3242 = this->long_branch_stubs_
.find(ent
);
3243 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3246 // A class to handle .glink.
3248 template<int size
, bool big_endian
>
3249 class Output_data_glink
: public Output_section_data
3252 static const int pltresolve_size
= 16*4;
3254 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3255 : Output_section_data(16), targ_(targ
)
3259 // Write to a map file.
3261 do_print_to_mapfile(Mapfile
* mapfile
) const
3262 { mapfile
->print_output_data(this, _("** glink")); }
3266 set_final_data_size();
3270 do_write(Output_file
*);
3272 // Allows access to .got and .plt for do_write.
3273 Target_powerpc
<size
, big_endian
>* targ_
;
3276 template<int size
, bool big_endian
>
3278 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3280 unsigned int count
= this->targ_
->plt_entry_count();
3281 section_size_type total
= 0;
3287 // space for branch table
3288 total
+= 4 * (count
- 1);
3290 total
+= -total
& 15;
3291 total
+= this->pltresolve_size
;
3295 total
+= this->pltresolve_size
;
3297 // space for branch table
3300 total
+= 4 * (count
- 0x8000);
3304 this->set_data_size(total
);
3307 // Write out plt and long branch stub code.
3309 template<int size
, bool big_endian
>
3311 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3313 if (this->plt_call_stubs_
.empty()
3314 && this->long_branch_stubs_
.empty())
3317 const section_size_type start_off
= this->offset();
3318 const section_size_type off
= this->stub_offset();
3319 const section_size_type oview_size
=
3320 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3321 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3326 const Output_data_got_powerpc
<size
, big_endian
>* got
3327 = this->targ_
->got_section();
3328 Address got_os_addr
= got
->output_section()->address();
3330 if (!this->plt_call_stubs_
.empty())
3332 // The base address of the .plt section.
3333 Address plt_base
= this->targ_
->plt_section()->address();
3334 Address iplt_base
= invalid_address
;
3336 // Write out plt call stubs.
3337 typename
Plt_stub_entries::const_iterator cs
;
3338 for (cs
= this->plt_call_stubs_
.begin();
3339 cs
!= this->plt_call_stubs_
.end();
3344 const Symbol
* gsym
= cs
->first
.sym_
;
3347 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3348 && gsym
->can_use_relative_reloc(false));
3349 pltoff
= gsym
->plt_offset();
3354 const Sized_relobj_file
<size
, big_endian
>* relobj
3355 = cs
->first
.object_
;
3356 unsigned int local_sym_index
= cs
->first
.locsym_
;
3357 pltoff
= relobj
->local_plt_offset(local_sym_index
);
3359 Address plt_addr
= pltoff
;
3362 if (iplt_base
== invalid_address
)
3363 iplt_base
= this->targ_
->iplt_section()->address();
3364 plt_addr
+= iplt_base
;
3367 plt_addr
+= plt_base
;
3368 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3369 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3370 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3371 Address off
= plt_addr
- got_addr
;
3373 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3374 gold_error(_("%s: linkage table error against `%s'"),
3375 cs
->first
.object_
->name().c_str(),
3376 cs
->first
.sym_
->demangled_name().c_str());
3378 bool static_chain
= parameters
->options().plt_static_chain();
3379 bool thread_safe
= this->targ_
->plt_thread_safe();
3380 bool use_fake_dep
= false;
3381 Address cmp_branch_off
= 0;
3384 unsigned int pltindex
3385 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3386 / this->targ_
->plt_entry_size());
3388 = (this->targ_
->glink_section()->pltresolve_size
3390 if (pltindex
> 32768)
3391 glinkoff
+= (pltindex
- 32768) * 4;
3393 = this->targ_
->glink_section()->address() + glinkoff
;
3395 = (this->stub_address() + cs
->second
+ 24
3396 + 4 * (ha(off
) != 0)
3397 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3398 + 4 * static_chain
);
3399 cmp_branch_off
= to
- from
;
3400 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3403 p
= oview
+ cs
->second
;
3406 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3407 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3408 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3409 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3411 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3414 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3417 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3418 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3420 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3422 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3426 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3427 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3428 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3430 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3433 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3436 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3437 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3440 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3441 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3443 if (thread_safe
&& !use_fake_dep
)
3445 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3446 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3447 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3450 write_insn
<big_endian
>(p
, bctr
);
3454 // Write out long branch stubs.
3455 typename
Branch_stub_entries::const_iterator bs
;
3456 for (bs
= this->long_branch_stubs_
.begin();
3457 bs
!= this->long_branch_stubs_
.end();
3460 p
= oview
+ this->plt_size_
+ bs
->second
;
3461 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3462 Address delta
= bs
->first
.dest_
- loc
;
3463 if (delta
+ (1 << 25) < 2 << 25)
3464 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3468 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3469 gold_assert(brlt_addr
!= invalid_address
);
3470 brlt_addr
+= this->targ_
->brlt_section()->address();
3471 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3472 Address brltoff
= brlt_addr
- got_addr
;
3473 if (ha(brltoff
) == 0)
3475 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3479 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3480 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3482 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3483 write_insn
<big_endian
>(p
, bctr
);
3489 if (!this->plt_call_stubs_
.empty())
3491 // The base address of the .plt section.
3492 Address plt_base
= this->targ_
->plt_section()->address();
3493 Address iplt_base
= invalid_address
;
3494 // The address of _GLOBAL_OFFSET_TABLE_.
3495 Address g_o_t
= invalid_address
;
3497 // Write out plt call stubs.
3498 typename
Plt_stub_entries::const_iterator cs
;
3499 for (cs
= this->plt_call_stubs_
.begin();
3500 cs
!= this->plt_call_stubs_
.end();
3505 const Symbol
* gsym
= cs
->first
.sym_
;
3508 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3509 && gsym
->can_use_relative_reloc(false));
3510 plt_addr
= gsym
->plt_offset();
3515 const Sized_relobj_file
<size
, big_endian
>* relobj
3516 = cs
->first
.object_
;
3517 unsigned int local_sym_index
= cs
->first
.locsym_
;
3518 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
3522 if (iplt_base
== invalid_address
)
3523 iplt_base
= this->targ_
->iplt_section()->address();
3524 plt_addr
+= iplt_base
;
3527 plt_addr
+= plt_base
;
3529 p
= oview
+ cs
->second
;
3530 if (parameters
->options().output_is_position_independent())
3533 const Powerpc_relobj
<size
, big_endian
>* ppcobj
3534 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
3535 (cs
->first
.object_
));
3536 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
3538 unsigned int got2
= ppcobj
->got2_shndx();
3539 got_addr
= ppcobj
->get_output_section_offset(got2
);
3540 gold_assert(got_addr
!= invalid_address
);
3541 got_addr
+= (ppcobj
->output_section(got2
)->address()
3542 + cs
->first
.addend_
);
3546 if (g_o_t
== invalid_address
)
3548 const Output_data_got_powerpc
<size
, big_endian
>* got
3549 = this->targ_
->got_section();
3550 g_o_t
= got
->address() + got
->g_o_t();
3555 Address off
= plt_addr
- got_addr
;
3558 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
3559 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
3560 write_insn
<big_endian
>(p
+ 8, bctr
);
3564 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
3565 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
3566 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3567 write_insn
<big_endian
>(p
+ 12, bctr
);
3572 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
3573 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
3574 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3575 write_insn
<big_endian
>(p
+ 12, bctr
);
3580 // Write out long branch stubs.
3581 typename
Branch_stub_entries::const_iterator bs
;
3582 for (bs
= this->long_branch_stubs_
.begin();
3583 bs
!= this->long_branch_stubs_
.end();
3586 p
= oview
+ this->plt_size_
+ bs
->second
;
3587 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3588 Address delta
= bs
->first
.dest_
- loc
;
3589 if (delta
+ (1 << 25) < 2 << 25)
3590 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3591 else if (!parameters
->options().output_is_position_independent())
3593 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
3594 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
3595 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
3596 write_insn
<big_endian
>(p
+ 12, bctr
);
3601 write_insn
<big_endian
>(p
+ 0, mflr_0
);
3602 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
3603 write_insn
<big_endian
>(p
+ 8, mflr_12
);
3604 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
3605 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
3606 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3607 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
3608 write_insn
<big_endian
>(p
+ 28, bctr
);
3614 // Write out .glink.
3616 template<int size
, bool big_endian
>
3618 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
3620 const section_size_type off
= this->offset();
3621 const section_size_type oview_size
=
3622 convert_to_section_size_type(this->data_size());
3623 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3626 // The base address of the .plt section.
3627 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3628 Address plt_base
= this->targ_
->plt_section()->address();
3632 // Write pltresolve stub.
3634 Address after_bcl
= this->address() + 16;
3635 Address pltoff
= plt_base
- after_bcl
;
3637 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
3639 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
3640 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
3641 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
3642 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
3643 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
3644 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
3645 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
3646 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
3647 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3648 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
3649 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
3650 while (p
< oview
+ this->pltresolve_size
)
3651 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3653 // Write lazy link call stubs.
3655 while (p
< oview
+ oview_size
)
3659 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
3663 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
3664 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
3666 uint32_t branch_off
= 8 - (p
- oview
);
3667 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
3673 const Output_data_got_powerpc
<size
, big_endian
>* got
3674 = this->targ_
->got_section();
3675 // The address of _GLOBAL_OFFSET_TABLE_.
3676 Address g_o_t
= got
->address() + got
->g_o_t();
3678 // Write out pltresolve branch table.
3680 unsigned int the_end
= oview_size
- this->pltresolve_size
;
3681 unsigned char* end_p
= oview
+ the_end
;
3682 while (p
< end_p
- 8 * 4)
3683 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
3685 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3687 // Write out pltresolve call stub.
3688 if (parameters
->options().output_is_position_independent())
3690 Address res0_off
= 0;
3691 Address after_bcl_off
= the_end
+ 12;
3692 Address bcl_res0
= after_bcl_off
- res0_off
;
3694 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
3695 write_insn
<big_endian
>(p
+ 4, mflr_0
);
3696 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
3697 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
3698 write_insn
<big_endian
>(p
+ 16, mflr_12
);
3699 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3700 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
3702 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
3704 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
3705 if (ha(got_bcl
) == ha(got_bcl
+ 4))
3707 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
3708 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
3712 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
3713 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
3715 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
3716 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
3717 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
3718 write_insn
<big_endian
>(p
+ 52, bctr
);
3719 write_insn
<big_endian
>(p
+ 56, nop
);
3720 write_insn
<big_endian
>(p
+ 60, nop
);
3724 Address res0
= this->address();
3726 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
3727 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
3728 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3729 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
3731 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
3732 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
3733 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
3734 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
3735 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3736 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
3738 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
3739 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
3740 write_insn
<big_endian
>(p
+ 32, bctr
);
3741 write_insn
<big_endian
>(p
+ 36, nop
);
3742 write_insn
<big_endian
>(p
+ 40, nop
);
3743 write_insn
<big_endian
>(p
+ 44, nop
);
3744 write_insn
<big_endian
>(p
+ 48, nop
);
3745 write_insn
<big_endian
>(p
+ 52, nop
);
3746 write_insn
<big_endian
>(p
+ 56, nop
);
3747 write_insn
<big_endian
>(p
+ 60, nop
);
3752 of
->write_output_view(off
, oview_size
, oview
);
3756 // A class to handle linker generated save/restore functions.
3758 template<int size
, bool big_endian
>
3759 class Output_data_save_res
: public Output_section_data_build
3762 Output_data_save_res(Symbol_table
* symtab
);
3765 // Write to a map file.
3767 do_print_to_mapfile(Mapfile
* mapfile
) const
3768 { mapfile
->print_output_data(this, _("** save/restore")); }
3771 do_write(Output_file
*);
3774 // The maximum size of save/restore contents.
3775 static const unsigned int savres_max
= 218*4;
3778 savres_define(Symbol_table
* symtab
,
3780 unsigned int lo
, unsigned int hi
,
3781 unsigned char* write_ent(unsigned char*, int),
3782 unsigned char* write_tail(unsigned char*, int));
3784 unsigned char *contents_
;
3787 template<bool big_endian
>
3788 static unsigned char*
3789 savegpr0(unsigned char* p
, int r
)
3791 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3792 write_insn
<big_endian
>(p
, insn
);
3796 template<bool big_endian
>
3797 static unsigned char*
3798 savegpr0_tail(unsigned char* p
, int r
)
3800 p
= savegpr0
<big_endian
>(p
, r
);
3801 uint32_t insn
= std_0_1
+ 16;
3802 write_insn
<big_endian
>(p
, insn
);
3804 write_insn
<big_endian
>(p
, blr
);
3808 template<bool big_endian
>
3809 static unsigned char*
3810 restgpr0(unsigned char* p
, int r
)
3812 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3813 write_insn
<big_endian
>(p
, insn
);
3817 template<bool big_endian
>
3818 static unsigned char*
3819 restgpr0_tail(unsigned char* p
, int r
)
3821 uint32_t insn
= ld_0_1
+ 16;
3822 write_insn
<big_endian
>(p
, insn
);
3824 p
= restgpr0
<big_endian
>(p
, r
);
3825 write_insn
<big_endian
>(p
, mtlr_0
);
3829 p
= restgpr0
<big_endian
>(p
, 30);
3830 p
= restgpr0
<big_endian
>(p
, 31);
3832 write_insn
<big_endian
>(p
, blr
);
3836 template<bool big_endian
>
3837 static unsigned char*
3838 savegpr1(unsigned char* p
, int r
)
3840 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3841 write_insn
<big_endian
>(p
, insn
);
3845 template<bool big_endian
>
3846 static unsigned char*
3847 savegpr1_tail(unsigned char* p
, int r
)
3849 p
= savegpr1
<big_endian
>(p
, r
);
3850 write_insn
<big_endian
>(p
, blr
);
3854 template<bool big_endian
>
3855 static unsigned char*
3856 restgpr1(unsigned char* p
, int r
)
3858 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3859 write_insn
<big_endian
>(p
, insn
);
3863 template<bool big_endian
>
3864 static unsigned char*
3865 restgpr1_tail(unsigned char* p
, int r
)
3867 p
= restgpr1
<big_endian
>(p
, r
);
3868 write_insn
<big_endian
>(p
, blr
);
3872 template<bool big_endian
>
3873 static unsigned char*
3874 savefpr(unsigned char* p
, int r
)
3876 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3877 write_insn
<big_endian
>(p
, insn
);
3881 template<bool big_endian
>
3882 static unsigned char*
3883 savefpr0_tail(unsigned char* p
, int r
)
3885 p
= savefpr
<big_endian
>(p
, r
);
3886 write_insn
<big_endian
>(p
, std_0_1
+ 16);
3888 write_insn
<big_endian
>(p
, blr
);
3892 template<bool big_endian
>
3893 static unsigned char*
3894 restfpr(unsigned char* p
, int r
)
3896 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3897 write_insn
<big_endian
>(p
, insn
);
3901 template<bool big_endian
>
3902 static unsigned char*
3903 restfpr0_tail(unsigned char* p
, int r
)
3905 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
3907 p
= restfpr
<big_endian
>(p
, r
);
3908 write_insn
<big_endian
>(p
, mtlr_0
);
3912 p
= restfpr
<big_endian
>(p
, 30);
3913 p
= restfpr
<big_endian
>(p
, 31);
3915 write_insn
<big_endian
>(p
, blr
);
3919 template<bool big_endian
>
3920 static unsigned char*
3921 savefpr1_tail(unsigned char* p
, int r
)
3923 p
= savefpr
<big_endian
>(p
, r
);
3924 write_insn
<big_endian
>(p
, blr
);
3928 template<bool big_endian
>
3929 static unsigned char*
3930 restfpr1_tail(unsigned char* p
, int r
)
3932 p
= restfpr
<big_endian
>(p
, r
);
3933 write_insn
<big_endian
>(p
, blr
);
3937 template<bool big_endian
>
3938 static unsigned char*
3939 savevr(unsigned char* p
, int r
)
3941 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3942 write_insn
<big_endian
>(p
, insn
);
3944 insn
= stvx_0_12_0
+ (r
<< 21);
3945 write_insn
<big_endian
>(p
, insn
);
3949 template<bool big_endian
>
3950 static unsigned char*
3951 savevr_tail(unsigned char* p
, int r
)
3953 p
= savevr
<big_endian
>(p
, r
);
3954 write_insn
<big_endian
>(p
, blr
);
3958 template<bool big_endian
>
3959 static unsigned char*
3960 restvr(unsigned char* p
, int r
)
3962 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3963 write_insn
<big_endian
>(p
, insn
);
3965 insn
= lvx_0_12_0
+ (r
<< 21);
3966 write_insn
<big_endian
>(p
, insn
);
3970 template<bool big_endian
>
3971 static unsigned char*
3972 restvr_tail(unsigned char* p
, int r
)
3974 p
= restvr
<big_endian
>(p
, r
);
3975 write_insn
<big_endian
>(p
, blr
);
3980 template<int size
, bool big_endian
>
3981 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
3982 Symbol_table
* symtab
)
3983 : Output_section_data_build(4),
3986 this->savres_define(symtab
,
3987 "_savegpr0_", 14, 31,
3988 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
3989 this->savres_define(symtab
,
3990 "_restgpr0_", 14, 29,
3991 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3992 this->savres_define(symtab
,
3993 "_restgpr0_", 30, 31,
3994 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3995 this->savres_define(symtab
,
3996 "_savegpr1_", 14, 31,
3997 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
3998 this->savres_define(symtab
,
3999 "_restgpr1_", 14, 31,
4000 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4001 this->savres_define(symtab
,
4002 "_savefpr_", 14, 31,
4003 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4004 this->savres_define(symtab
,
4005 "_restfpr_", 14, 29,
4006 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4007 this->savres_define(symtab
,
4008 "_restfpr_", 30, 31,
4009 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4010 this->savres_define(symtab
,
4012 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4013 this->savres_define(symtab
,
4015 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4016 this->savres_define(symtab
,
4018 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4019 this->savres_define(symtab
,
4021 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4024 template<int size
, bool big_endian
>
4026 Output_data_save_res
<size
, big_endian
>::savres_define(
4027 Symbol_table
* symtab
,
4029 unsigned int lo
, unsigned int hi
,
4030 unsigned char* write_ent(unsigned char*, int),
4031 unsigned char* write_tail(unsigned char*, int))
4033 size_t len
= strlen(name
);
4034 bool writing
= false;
4037 memcpy(sym
, name
, len
);
4040 for (unsigned int i
= lo
; i
<= hi
; i
++)
4042 sym
[len
+ 0] = i
/ 10 + '0';
4043 sym
[len
+ 1] = i
% 10 + '0';
4044 Symbol
* gsym
= symtab
->lookup(sym
);
4045 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4046 writing
= writing
|| refd
;
4049 if (this->contents_
== NULL
)
4050 this->contents_
= new unsigned char[this->savres_max
];
4052 section_size_type value
= this->current_data_size();
4053 unsigned char* p
= this->contents_
+ value
;
4055 p
= write_ent(p
, i
);
4057 p
= write_tail(p
, i
);
4058 section_size_type cur_size
= p
- this->contents_
;
4059 this->set_current_data_size(cur_size
);
4061 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4062 this, value
, cur_size
- value
,
4063 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4064 elfcpp::STV_HIDDEN
, 0, false, false);
4069 // Write out save/restore.
4071 template<int size
, bool big_endian
>
4073 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4075 const section_size_type off
= this->offset();
4076 const section_size_type oview_size
=
4077 convert_to_section_size_type(this->data_size());
4078 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4079 memcpy(oview
, this->contents_
, oview_size
);
4080 of
->write_output_view(off
, oview_size
, oview
);
4084 // Create the glink section.
4086 template<int size
, bool big_endian
>
4088 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4090 if (this->glink_
== NULL
)
4092 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4093 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4094 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4095 this->glink_
, ORDER_TEXT
, false);
4099 // Create a PLT entry for a global symbol.
4101 template<int size
, bool big_endian
>
4103 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4107 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4108 && gsym
->can_use_relative_reloc(false))
4110 if (this->iplt_
== NULL
)
4111 this->make_iplt_section(symtab
, layout
);
4112 this->iplt_
->add_ifunc_entry(gsym
);
4116 if (this->plt_
== NULL
)
4117 this->make_plt_section(symtab
, layout
);
4118 this->plt_
->add_entry(gsym
);
4122 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4124 template<int size
, bool big_endian
>
4126 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4127 Symbol_table
* symtab
,
4129 Sized_relobj_file
<size
, big_endian
>* relobj
,
4132 if (this->iplt_
== NULL
)
4133 this->make_iplt_section(symtab
, layout
);
4134 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4137 // Return the number of entries in the PLT.
4139 template<int size
, bool big_endian
>
4141 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4143 if (this->plt_
== NULL
)
4145 unsigned int count
= this->plt_
->entry_count();
4146 if (this->iplt_
!= NULL
)
4147 count
+= this->iplt_
->entry_count();
4151 // Return the offset of the first non-reserved PLT entry.
4153 template<int size
, bool big_endian
>
4155 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4157 return this->plt_
->first_plt_entry_offset();
4160 // Return the size of each PLT entry.
4162 template<int size
, bool big_endian
>
4164 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4166 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4169 // Create a GOT entry for local dynamic __tls_get_addr calls.
4171 template<int size
, bool big_endian
>
4173 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4174 Symbol_table
* symtab
,
4176 Sized_relobj_file
<size
, big_endian
>* object
)
4178 if (this->tlsld_got_offset_
== -1U)
4180 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4181 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4182 Output_data_got_powerpc
<size
, big_endian
>* got
4183 = this->got_section(symtab
, layout
);
4184 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4185 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4187 this->tlsld_got_offset_
= got_offset
;
4189 return this->tlsld_got_offset_
;
4192 // Get the Reference_flags for a particular relocation.
4194 template<int size
, bool big_endian
>
4196 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4200 case elfcpp::R_POWERPC_NONE
:
4201 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4202 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4203 case elfcpp::R_PPC64_TOC
:
4204 // No symbol reference.
4207 case elfcpp::R_PPC64_ADDR64
:
4208 case elfcpp::R_PPC64_UADDR64
:
4209 case elfcpp::R_POWERPC_ADDR32
:
4210 case elfcpp::R_POWERPC_UADDR32
:
4211 case elfcpp::R_POWERPC_ADDR16
:
4212 case elfcpp::R_POWERPC_UADDR16
:
4213 case elfcpp::R_POWERPC_ADDR16_LO
:
4214 case elfcpp::R_POWERPC_ADDR16_HI
:
4215 case elfcpp::R_POWERPC_ADDR16_HA
:
4216 return Symbol::ABSOLUTE_REF
;
4218 case elfcpp::R_POWERPC_ADDR24
:
4219 case elfcpp::R_POWERPC_ADDR14
:
4220 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4221 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4222 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4224 case elfcpp::R_PPC64_REL64
:
4225 case elfcpp::R_POWERPC_REL32
:
4226 case elfcpp::R_PPC_LOCAL24PC
:
4227 case elfcpp::R_POWERPC_REL16
:
4228 case elfcpp::R_POWERPC_REL16_LO
:
4229 case elfcpp::R_POWERPC_REL16_HI
:
4230 case elfcpp::R_POWERPC_REL16_HA
:
4231 return Symbol::RELATIVE_REF
;
4233 case elfcpp::R_POWERPC_REL24
:
4234 case elfcpp::R_PPC_PLTREL24
:
4235 case elfcpp::R_POWERPC_REL14
:
4236 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4237 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4238 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4240 case elfcpp::R_POWERPC_GOT16
:
4241 case elfcpp::R_POWERPC_GOT16_LO
:
4242 case elfcpp::R_POWERPC_GOT16_HI
:
4243 case elfcpp::R_POWERPC_GOT16_HA
:
4244 case elfcpp::R_PPC64_GOT16_DS
:
4245 case elfcpp::R_PPC64_GOT16_LO_DS
:
4246 case elfcpp::R_PPC64_TOC16
:
4247 case elfcpp::R_PPC64_TOC16_LO
:
4248 case elfcpp::R_PPC64_TOC16_HI
:
4249 case elfcpp::R_PPC64_TOC16_HA
:
4250 case elfcpp::R_PPC64_TOC16_DS
:
4251 case elfcpp::R_PPC64_TOC16_LO_DS
:
4253 return Symbol::ABSOLUTE_REF
;
4255 case elfcpp::R_POWERPC_GOT_TPREL16
:
4256 case elfcpp::R_POWERPC_TLS
:
4257 return Symbol::TLS_REF
;
4259 case elfcpp::R_POWERPC_COPY
:
4260 case elfcpp::R_POWERPC_GLOB_DAT
:
4261 case elfcpp::R_POWERPC_JMP_SLOT
:
4262 case elfcpp::R_POWERPC_RELATIVE
:
4263 case elfcpp::R_POWERPC_DTPMOD
:
4265 // Not expected. We will give an error later.
4270 // Report an unsupported relocation against a local symbol.
4272 template<int size
, bool big_endian
>
4274 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4275 Sized_relobj_file
<size
, big_endian
>* object
,
4276 unsigned int r_type
)
4278 gold_error(_("%s: unsupported reloc %u against local symbol"),
4279 object
->name().c_str(), r_type
);
4282 // We are about to emit a dynamic relocation of type R_TYPE. If the
4283 // dynamic linker does not support it, issue an error.
4285 template<int size
, bool big_endian
>
4287 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4288 unsigned int r_type
)
4290 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4292 // These are the relocation types supported by glibc for both 32-bit
4293 // and 64-bit powerpc.
4296 case elfcpp::R_POWERPC_NONE
:
4297 case elfcpp::R_POWERPC_RELATIVE
:
4298 case elfcpp::R_POWERPC_GLOB_DAT
:
4299 case elfcpp::R_POWERPC_DTPMOD
:
4300 case elfcpp::R_POWERPC_DTPREL
:
4301 case elfcpp::R_POWERPC_TPREL
:
4302 case elfcpp::R_POWERPC_JMP_SLOT
:
4303 case elfcpp::R_POWERPC_COPY
:
4304 case elfcpp::R_POWERPC_IRELATIVE
:
4305 case elfcpp::R_POWERPC_ADDR32
:
4306 case elfcpp::R_POWERPC_UADDR32
:
4307 case elfcpp::R_POWERPC_ADDR24
:
4308 case elfcpp::R_POWERPC_ADDR16
:
4309 case elfcpp::R_POWERPC_UADDR16
:
4310 case elfcpp::R_POWERPC_ADDR16_LO
:
4311 case elfcpp::R_POWERPC_ADDR16_HI
:
4312 case elfcpp::R_POWERPC_ADDR16_HA
:
4313 case elfcpp::R_POWERPC_ADDR14
:
4314 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4315 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4316 case elfcpp::R_POWERPC_REL32
:
4317 case elfcpp::R_POWERPC_REL24
:
4318 case elfcpp::R_POWERPC_TPREL16
:
4319 case elfcpp::R_POWERPC_TPREL16_LO
:
4320 case elfcpp::R_POWERPC_TPREL16_HI
:
4321 case elfcpp::R_POWERPC_TPREL16_HA
:
4332 // These are the relocation types supported only on 64-bit.
4333 case elfcpp::R_PPC64_ADDR64
:
4334 case elfcpp::R_PPC64_UADDR64
:
4335 case elfcpp::R_PPC64_JMP_IREL
:
4336 case elfcpp::R_PPC64_ADDR16_DS
:
4337 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4338 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4339 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4340 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4341 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4342 case elfcpp::R_PPC64_REL64
:
4343 case elfcpp::R_POWERPC_ADDR30
:
4344 case elfcpp::R_PPC64_TPREL16_DS
:
4345 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4346 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4347 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4348 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4349 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4360 // These are the relocation types supported only on 32-bit.
4361 // ??? glibc ld.so doesn't need to support these.
4362 case elfcpp::R_POWERPC_DTPREL16
:
4363 case elfcpp::R_POWERPC_DTPREL16_LO
:
4364 case elfcpp::R_POWERPC_DTPREL16_HI
:
4365 case elfcpp::R_POWERPC_DTPREL16_HA
:
4373 // This prevents us from issuing more than one error per reloc
4374 // section. But we can still wind up issuing more than one
4375 // error per object file.
4376 if (this->issued_non_pic_error_
)
4378 gold_assert(parameters
->options().output_is_position_independent());
4379 object
->error(_("requires unsupported dynamic reloc; "
4380 "recompile with -fPIC"));
4381 this->issued_non_pic_error_
= true;
4385 // Return whether we need to make a PLT entry for a relocation of the
4386 // given type against a STT_GNU_IFUNC symbol.
4388 template<int size
, bool big_endian
>
4390 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4391 Sized_relobj_file
<size
, big_endian
>* object
,
4392 unsigned int r_type
)
4394 // In non-pic code any reference will resolve to the plt call stub
4395 // for the ifunc symbol.
4396 if (size
== 32 && !parameters
->options().output_is_position_independent())
4401 // Word size refs from data sections are OK.
4402 case elfcpp::R_POWERPC_ADDR32
:
4403 case elfcpp::R_POWERPC_UADDR32
:
4408 case elfcpp::R_PPC64_ADDR64
:
4409 case elfcpp::R_PPC64_UADDR64
:
4414 // GOT refs are good.
4415 case elfcpp::R_POWERPC_GOT16
:
4416 case elfcpp::R_POWERPC_GOT16_LO
:
4417 case elfcpp::R_POWERPC_GOT16_HI
:
4418 case elfcpp::R_POWERPC_GOT16_HA
:
4419 case elfcpp::R_PPC64_GOT16_DS
:
4420 case elfcpp::R_PPC64_GOT16_LO_DS
:
4423 // So are function calls.
4424 case elfcpp::R_POWERPC_ADDR24
:
4425 case elfcpp::R_POWERPC_ADDR14
:
4426 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4427 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4428 case elfcpp::R_POWERPC_REL24
:
4429 case elfcpp::R_PPC_PLTREL24
:
4430 case elfcpp::R_POWERPC_REL14
:
4431 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4432 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4439 // Anything else is a problem.
4440 // If we are building a static executable, the libc startup function
4441 // responsible for applying indirect function relocations is going
4442 // to complain about the reloc type.
4443 // If we are building a dynamic executable, we will have a text
4444 // relocation. The dynamic loader will set the text segment
4445 // writable and non-executable to apply text relocations. So we'll
4446 // segfault when trying to run the indirection function to resolve
4448 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4449 object
->name().c_str(), r_type
);
4453 // Scan a relocation for a local symbol.
4455 template<int size
, bool big_endian
>
4457 Target_powerpc
<size
, big_endian
>::Scan::local(
4458 Symbol_table
* symtab
,
4460 Target_powerpc
<size
, big_endian
>* target
,
4461 Sized_relobj_file
<size
, big_endian
>* object
,
4462 unsigned int data_shndx
,
4463 Output_section
* output_section
,
4464 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4465 unsigned int r_type
,
4466 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4469 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
4471 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4472 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4474 this->expect_tls_get_addr_call();
4475 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4476 if (tls_type
!= tls::TLSOPT_NONE
)
4477 this->skip_next_tls_get_addr_call();
4479 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4480 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4482 this->expect_tls_get_addr_call();
4483 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4484 if (tls_type
!= tls::TLSOPT_NONE
)
4485 this->skip_next_tls_get_addr_call();
4488 Powerpc_relobj
<size
, big_endian
>* ppc_object
4489 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4494 && data_shndx
== ppc_object
->opd_shndx()
4495 && r_type
== elfcpp::R_PPC64_ADDR64
)
4496 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4500 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4501 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4502 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
4504 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4505 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4506 r_type
, r_sym
, reloc
.get_r_addend());
4507 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4512 case elfcpp::R_POWERPC_NONE
:
4513 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4514 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4515 case elfcpp::R_PPC64_TOCSAVE
:
4516 case elfcpp::R_PPC_EMB_MRKREF
:
4517 case elfcpp::R_POWERPC_TLS
:
4520 case elfcpp::R_PPC64_TOC
:
4522 Output_data_got_powerpc
<size
, big_endian
>* got
4523 = target
->got_section(symtab
, layout
);
4524 if (parameters
->options().output_is_position_independent())
4526 Address off
= reloc
.get_r_offset();
4528 && data_shndx
== ppc_object
->opd_shndx()
4529 && ppc_object
->get_opd_discard(off
- 8))
4532 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4533 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4534 rela_dyn
->add_output_section_relative(got
->output_section(),
4535 elfcpp::R_POWERPC_RELATIVE
,
4537 object
, data_shndx
, off
,
4538 symobj
->toc_base_offset());
4543 case elfcpp::R_PPC64_ADDR64
:
4544 case elfcpp::R_PPC64_UADDR64
:
4545 case elfcpp::R_POWERPC_ADDR32
:
4546 case elfcpp::R_POWERPC_UADDR32
:
4547 case elfcpp::R_POWERPC_ADDR24
:
4548 case elfcpp::R_POWERPC_ADDR16
:
4549 case elfcpp::R_POWERPC_ADDR16_LO
:
4550 case elfcpp::R_POWERPC_ADDR16_HI
:
4551 case elfcpp::R_POWERPC_ADDR16_HA
:
4552 case elfcpp::R_POWERPC_UADDR16
:
4553 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4554 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4555 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4556 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4557 case elfcpp::R_PPC64_ADDR16_DS
:
4558 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4559 case elfcpp::R_POWERPC_ADDR14
:
4560 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4561 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4562 // If building a shared library (or a position-independent
4563 // executable), we need to create a dynamic relocation for
4565 if (parameters
->options().output_is_position_independent()
4566 || (size
== 64 && is_ifunc
))
4568 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4570 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
4571 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
4573 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4574 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4577 rela_dyn
= target
->iplt_section()->rel_plt();
4578 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4580 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4581 output_section
, data_shndx
,
4582 reloc
.get_r_offset(),
4583 reloc
.get_r_addend(), false);
4587 check_non_pic(object
, r_type
);
4588 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4589 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
4590 data_shndx
, reloc
.get_r_offset(),
4591 reloc
.get_r_addend());
4596 case elfcpp::R_POWERPC_REL24
:
4597 case elfcpp::R_PPC_PLTREL24
:
4598 case elfcpp::R_PPC_LOCAL24PC
:
4599 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4600 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4601 reloc
.get_r_addend());
4604 case elfcpp::R_POWERPC_REL14
:
4605 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4606 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4607 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4608 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4609 reloc
.get_r_addend());
4612 case elfcpp::R_PPC64_REL64
:
4613 case elfcpp::R_POWERPC_REL32
:
4614 case elfcpp::R_POWERPC_REL16
:
4615 case elfcpp::R_POWERPC_REL16_LO
:
4616 case elfcpp::R_POWERPC_REL16_HI
:
4617 case elfcpp::R_POWERPC_REL16_HA
:
4618 case elfcpp::R_POWERPC_SECTOFF
:
4619 case elfcpp::R_POWERPC_TPREL16
:
4620 case elfcpp::R_POWERPC_DTPREL16
:
4621 case elfcpp::R_POWERPC_SECTOFF_LO
:
4622 case elfcpp::R_POWERPC_TPREL16_LO
:
4623 case elfcpp::R_POWERPC_DTPREL16_LO
:
4624 case elfcpp::R_POWERPC_SECTOFF_HI
:
4625 case elfcpp::R_POWERPC_TPREL16_HI
:
4626 case elfcpp::R_POWERPC_DTPREL16_HI
:
4627 case elfcpp::R_POWERPC_SECTOFF_HA
:
4628 case elfcpp::R_POWERPC_TPREL16_HA
:
4629 case elfcpp::R_POWERPC_DTPREL16_HA
:
4630 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4631 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4632 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4633 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4634 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4635 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4636 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4637 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4638 case elfcpp::R_PPC64_TPREL16_DS
:
4639 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4640 case elfcpp::R_PPC64_DTPREL16_DS
:
4641 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4642 case elfcpp::R_PPC64_SECTOFF_DS
:
4643 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4644 case elfcpp::R_PPC64_TLSGD
:
4645 case elfcpp::R_PPC64_TLSLD
:
4648 case elfcpp::R_POWERPC_GOT16
:
4649 case elfcpp::R_POWERPC_GOT16_LO
:
4650 case elfcpp::R_POWERPC_GOT16_HI
:
4651 case elfcpp::R_POWERPC_GOT16_HA
:
4652 case elfcpp::R_PPC64_GOT16_DS
:
4653 case elfcpp::R_PPC64_GOT16_LO_DS
:
4655 // The symbol requires a GOT entry.
4656 Output_data_got_powerpc
<size
, big_endian
>* got
4657 = target
->got_section(symtab
, layout
);
4658 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4660 if (!parameters
->options().output_is_position_independent())
4662 if (size
== 32 && is_ifunc
)
4663 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
4665 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
4667 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
4669 // If we are generating a shared object or a pie, this
4670 // symbol's GOT entry will be set by a dynamic relocation.
4672 off
= got
->add_constant(0);
4673 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
4675 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4676 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4679 rela_dyn
= target
->iplt_section()->rel_plt();
4680 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4682 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4683 got
, off
, 0, false);
4688 case elfcpp::R_PPC64_TOC16
:
4689 case elfcpp::R_PPC64_TOC16_LO
:
4690 case elfcpp::R_PPC64_TOC16_HI
:
4691 case elfcpp::R_PPC64_TOC16_HA
:
4692 case elfcpp::R_PPC64_TOC16_DS
:
4693 case elfcpp::R_PPC64_TOC16_LO_DS
:
4694 // We need a GOT section.
4695 target
->got_section(symtab
, layout
);
4698 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4699 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4700 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4701 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4703 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4704 if (tls_type
== tls::TLSOPT_NONE
)
4706 Output_data_got_powerpc
<size
, big_endian
>* got
4707 = target
->got_section(symtab
, layout
);
4708 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4709 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4710 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
4711 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
4713 else if (tls_type
== tls::TLSOPT_TO_LE
)
4715 // no GOT relocs needed for Local Exec.
4722 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4723 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4724 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4725 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4727 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4728 if (tls_type
== tls::TLSOPT_NONE
)
4729 target
->tlsld_got_offset(symtab
, layout
, object
);
4730 else if (tls_type
== tls::TLSOPT_TO_LE
)
4732 // no GOT relocs needed for Local Exec.
4733 if (parameters
->options().emit_relocs())
4735 Output_section
* os
= layout
->tls_segment()->first_section();
4736 gold_assert(os
!= NULL
);
4737 os
->set_needs_symtab_index();
4745 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4746 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4747 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4748 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4750 Output_data_got_powerpc
<size
, big_endian
>* got
4751 = target
->got_section(symtab
, layout
);
4752 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4753 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
4757 case elfcpp::R_POWERPC_GOT_TPREL16
:
4758 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4759 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4760 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4762 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
4763 if (tls_type
== tls::TLSOPT_NONE
)
4765 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4766 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
4768 Output_data_got_powerpc
<size
, big_endian
>* got
4769 = target
->got_section(symtab
, layout
);
4770 unsigned int off
= got
->add_constant(0);
4771 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
4773 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4774 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
4775 elfcpp::R_POWERPC_TPREL
,
4779 else if (tls_type
== tls::TLSOPT_TO_LE
)
4781 // no GOT relocs needed for Local Exec.
4789 unsupported_reloc_local(object
, r_type
);
4795 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4796 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4797 case elfcpp::R_POWERPC_GOT_TPREL16
:
4798 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4799 case elfcpp::R_POWERPC_GOT16
:
4800 case elfcpp::R_PPC64_GOT16_DS
:
4801 case elfcpp::R_PPC64_TOC16
:
4802 case elfcpp::R_PPC64_TOC16_DS
:
4803 ppc_object
->set_has_small_toc_reloc();
4809 // Report an unsupported relocation against a global symbol.
4811 template<int size
, bool big_endian
>
4813 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
4814 Sized_relobj_file
<size
, big_endian
>* object
,
4815 unsigned int r_type
,
4818 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4819 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
4822 // Scan a relocation for a global symbol.
4824 template<int size
, bool big_endian
>
4826 Target_powerpc
<size
, big_endian
>::Scan::global(
4827 Symbol_table
* symtab
,
4829 Target_powerpc
<size
, big_endian
>* target
,
4830 Sized_relobj_file
<size
, big_endian
>* object
,
4831 unsigned int data_shndx
,
4832 Output_section
* output_section
,
4833 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4834 unsigned int r_type
,
4837 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
4840 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4841 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4843 this->expect_tls_get_addr_call();
4844 const bool final
= gsym
->final_value_is_known();
4845 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4846 if (tls_type
!= tls::TLSOPT_NONE
)
4847 this->skip_next_tls_get_addr_call();
4849 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4850 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4852 this->expect_tls_get_addr_call();
4853 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4854 if (tls_type
!= tls::TLSOPT_NONE
)
4855 this->skip_next_tls_get_addr_call();
4858 Powerpc_relobj
<size
, big_endian
>* ppc_object
4859 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4861 // A STT_GNU_IFUNC symbol may require a PLT entry.
4862 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4863 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
4865 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4866 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4867 reloc
.get_r_addend());
4868 target
->make_plt_entry(symtab
, layout
, gsym
);
4873 case elfcpp::R_POWERPC_NONE
:
4874 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4875 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4876 case elfcpp::R_PPC_LOCAL24PC
:
4877 case elfcpp::R_PPC_EMB_MRKREF
:
4878 case elfcpp::R_POWERPC_TLS
:
4881 case elfcpp::R_PPC64_TOC
:
4883 Output_data_got_powerpc
<size
, big_endian
>* got
4884 = target
->got_section(symtab
, layout
);
4885 if (parameters
->options().output_is_position_independent())
4887 Address off
= reloc
.get_r_offset();
4889 && data_shndx
== ppc_object
->opd_shndx()
4890 && ppc_object
->get_opd_discard(off
- 8))
4893 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4894 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4895 if (data_shndx
!= ppc_object
->opd_shndx())
4896 symobj
= static_cast
4897 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4898 rela_dyn
->add_output_section_relative(got
->output_section(),
4899 elfcpp::R_POWERPC_RELATIVE
,
4901 object
, data_shndx
, off
,
4902 symobj
->toc_base_offset());
4907 case elfcpp::R_PPC64_ADDR64
:
4909 && data_shndx
== ppc_object
->opd_shndx()
4910 && (gsym
->is_defined_in_discarded_section()
4911 || gsym
->object() != object
))
4913 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4917 case elfcpp::R_PPC64_UADDR64
:
4918 case elfcpp::R_POWERPC_ADDR32
:
4919 case elfcpp::R_POWERPC_UADDR32
:
4920 case elfcpp::R_POWERPC_ADDR24
:
4921 case elfcpp::R_POWERPC_ADDR16
:
4922 case elfcpp::R_POWERPC_ADDR16_LO
:
4923 case elfcpp::R_POWERPC_ADDR16_HI
:
4924 case elfcpp::R_POWERPC_ADDR16_HA
:
4925 case elfcpp::R_POWERPC_UADDR16
:
4926 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4927 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4928 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4929 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4930 case elfcpp::R_PPC64_ADDR16_DS
:
4931 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4932 case elfcpp::R_POWERPC_ADDR14
:
4933 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4934 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4936 // Make a PLT entry if necessary.
4937 if (gsym
->needs_plt_entry())
4939 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4941 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4942 reloc
.get_r_addend());
4943 target
->make_plt_entry(symtab
, layout
, gsym
);
4944 // Since this is not a PC-relative relocation, we may be
4945 // taking the address of a function. In that case we need to
4946 // set the entry in the dynamic symbol table to the address of
4947 // the PLT call stub.
4949 && gsym
->is_from_dynobj()
4950 && !parameters
->options().output_is_position_independent())
4951 gsym
->set_needs_dynsym_value();
4953 // Make a dynamic relocation if necessary.
4954 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4955 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
4957 if (gsym
->may_need_copy_reloc())
4959 target
->copy_reloc(symtab
, layout
, object
,
4960 data_shndx
, output_section
, gsym
, reloc
);
4962 else if ((size
== 32
4963 && r_type
== elfcpp::R_POWERPC_ADDR32
4964 && gsym
->can_use_relative_reloc(false)
4965 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
4966 && parameters
->options().shared()))
4968 && r_type
== elfcpp::R_PPC64_ADDR64
4969 && (gsym
->can_use_relative_reloc(false)
4970 || data_shndx
== ppc_object
->opd_shndx())))
4972 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4973 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4974 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4976 rela_dyn
= target
->iplt_section()->rel_plt();
4977 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4979 rela_dyn
->add_symbolless_global_addend(
4980 gsym
, dynrel
, output_section
, object
, data_shndx
,
4981 reloc
.get_r_offset(), reloc
.get_r_addend());
4985 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4986 check_non_pic(object
, r_type
);
4987 rela_dyn
->add_global(gsym
, r_type
, output_section
,
4989 reloc
.get_r_offset(),
4990 reloc
.get_r_addend());
4996 case elfcpp::R_PPC_PLTREL24
:
4997 case elfcpp::R_POWERPC_REL24
:
4998 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4999 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5000 reloc
.get_r_addend());
5001 if (gsym
->needs_plt_entry()
5002 || (!gsym
->final_value_is_known()
5003 && (gsym
->is_undefined()
5004 || gsym
->is_from_dynobj()
5005 || gsym
->is_preemptible())))
5006 target
->make_plt_entry(symtab
, layout
, gsym
);
5009 case elfcpp::R_PPC64_REL64
:
5010 case elfcpp::R_POWERPC_REL32
:
5011 // Make a dynamic relocation if necessary.
5012 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
5014 if (gsym
->may_need_copy_reloc())
5016 target
->copy_reloc(symtab
, layout
, object
,
5017 data_shndx
, output_section
, gsym
,
5022 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5023 check_non_pic(object
, r_type
);
5024 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5025 data_shndx
, reloc
.get_r_offset(),
5026 reloc
.get_r_addend());
5031 case elfcpp::R_POWERPC_REL14
:
5032 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5033 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5034 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5035 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5036 reloc
.get_r_addend());
5039 case elfcpp::R_POWERPC_REL16
:
5040 case elfcpp::R_POWERPC_REL16_LO
:
5041 case elfcpp::R_POWERPC_REL16_HI
:
5042 case elfcpp::R_POWERPC_REL16_HA
:
5043 case elfcpp::R_POWERPC_SECTOFF
:
5044 case elfcpp::R_POWERPC_TPREL16
:
5045 case elfcpp::R_POWERPC_DTPREL16
:
5046 case elfcpp::R_POWERPC_SECTOFF_LO
:
5047 case elfcpp::R_POWERPC_TPREL16_LO
:
5048 case elfcpp::R_POWERPC_DTPREL16_LO
:
5049 case elfcpp::R_POWERPC_SECTOFF_HI
:
5050 case elfcpp::R_POWERPC_TPREL16_HI
:
5051 case elfcpp::R_POWERPC_DTPREL16_HI
:
5052 case elfcpp::R_POWERPC_SECTOFF_HA
:
5053 case elfcpp::R_POWERPC_TPREL16_HA
:
5054 case elfcpp::R_POWERPC_DTPREL16_HA
:
5055 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5056 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5057 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5058 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5059 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5060 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5061 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5062 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5063 case elfcpp::R_PPC64_TPREL16_DS
:
5064 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5065 case elfcpp::R_PPC64_DTPREL16_DS
:
5066 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5067 case elfcpp::R_PPC64_SECTOFF_DS
:
5068 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5069 case elfcpp::R_PPC64_TLSGD
:
5070 case elfcpp::R_PPC64_TLSLD
:
5073 case elfcpp::R_POWERPC_GOT16
:
5074 case elfcpp::R_POWERPC_GOT16_LO
:
5075 case elfcpp::R_POWERPC_GOT16_HI
:
5076 case elfcpp::R_POWERPC_GOT16_HA
:
5077 case elfcpp::R_PPC64_GOT16_DS
:
5078 case elfcpp::R_PPC64_GOT16_LO_DS
:
5080 // The symbol requires a GOT entry.
5081 Output_data_got_powerpc
<size
, big_endian
>* got
;
5083 got
= target
->got_section(symtab
, layout
);
5084 if (gsym
->final_value_is_known())
5086 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
5087 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5089 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5091 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5093 // If we are generating a shared object or a pie, this
5094 // symbol's GOT entry will be set by a dynamic relocation.
5095 unsigned int off
= got
->add_constant(0);
5096 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5098 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5099 if (gsym
->can_use_relative_reloc(false)
5101 && gsym
->visibility() == elfcpp::STV_PROTECTED
5102 && parameters
->options().shared()))
5104 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
5105 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
5107 rela_dyn
= target
->iplt_section()->rel_plt();
5108 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
5110 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5114 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5115 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5121 case elfcpp::R_PPC64_TOC16
:
5122 case elfcpp::R_PPC64_TOC16_LO
:
5123 case elfcpp::R_PPC64_TOC16_HI
:
5124 case elfcpp::R_PPC64_TOC16_HA
:
5125 case elfcpp::R_PPC64_TOC16_DS
:
5126 case elfcpp::R_PPC64_TOC16_LO_DS
:
5127 // We need a GOT section.
5128 target
->got_section(symtab
, layout
);
5131 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5132 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5133 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5134 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5136 const bool final
= gsym
->final_value_is_known();
5137 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5138 if (tls_type
== tls::TLSOPT_NONE
)
5140 Output_data_got_powerpc
<size
, big_endian
>* got
5141 = target
->got_section(symtab
, layout
);
5142 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
5143 target
->rela_dyn_section(layout
),
5144 elfcpp::R_POWERPC_DTPMOD
,
5145 elfcpp::R_POWERPC_DTPREL
);
5147 else if (tls_type
== tls::TLSOPT_TO_IE
)
5149 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5151 Output_data_got_powerpc
<size
, big_endian
>* got
5152 = target
->got_section(symtab
, layout
);
5153 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5154 if (gsym
->is_undefined()
5155 || gsym
->is_from_dynobj())
5157 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5158 elfcpp::R_POWERPC_TPREL
);
5162 unsigned int off
= got
->add_constant(0);
5163 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5164 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5165 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5170 else if (tls_type
== tls::TLSOPT_TO_LE
)
5172 // no GOT relocs needed for Local Exec.
5179 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5180 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5181 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5182 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5184 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5185 if (tls_type
== tls::TLSOPT_NONE
)
5186 target
->tlsld_got_offset(symtab
, layout
, object
);
5187 else if (tls_type
== tls::TLSOPT_TO_LE
)
5189 // no GOT relocs needed for Local Exec.
5190 if (parameters
->options().emit_relocs())
5192 Output_section
* os
= layout
->tls_segment()->first_section();
5193 gold_assert(os
!= NULL
);
5194 os
->set_needs_symtab_index();
5202 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5203 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5204 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5205 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5207 Output_data_got_powerpc
<size
, big_endian
>* got
5208 = target
->got_section(symtab
, layout
);
5209 if (!gsym
->final_value_is_known()
5210 && (gsym
->is_from_dynobj()
5211 || gsym
->is_undefined()
5212 || gsym
->is_preemptible()))
5213 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5214 target
->rela_dyn_section(layout
),
5215 elfcpp::R_POWERPC_DTPREL
);
5217 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5221 case elfcpp::R_POWERPC_GOT_TPREL16
:
5222 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5223 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5224 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5226 const bool final
= gsym
->final_value_is_known();
5227 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5228 if (tls_type
== tls::TLSOPT_NONE
)
5230 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5232 Output_data_got_powerpc
<size
, big_endian
>* got
5233 = target
->got_section(symtab
, layout
);
5234 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5235 if (gsym
->is_undefined()
5236 || gsym
->is_from_dynobj())
5238 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5239 elfcpp::R_POWERPC_TPREL
);
5243 unsigned int off
= got
->add_constant(0);
5244 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5245 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5246 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5251 else if (tls_type
== tls::TLSOPT_TO_LE
)
5253 // no GOT relocs needed for Local Exec.
5261 unsupported_reloc_global(object
, r_type
, gsym
);
5267 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5268 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5269 case elfcpp::R_POWERPC_GOT_TPREL16
:
5270 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5271 case elfcpp::R_POWERPC_GOT16
:
5272 case elfcpp::R_PPC64_GOT16_DS
:
5273 case elfcpp::R_PPC64_TOC16
:
5274 case elfcpp::R_PPC64_TOC16_DS
:
5275 ppc_object
->set_has_small_toc_reloc();
5281 // Process relocations for gc.
5283 template<int size
, bool big_endian
>
5285 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5286 Symbol_table
* symtab
,
5288 Sized_relobj_file
<size
, big_endian
>* object
,
5289 unsigned int data_shndx
,
5291 const unsigned char* prelocs
,
5293 Output_section
* output_section
,
5294 bool needs_special_offset_handling
,
5295 size_t local_symbol_count
,
5296 const unsigned char* plocal_symbols
)
5298 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5299 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5300 Powerpc_relobj
<size
, big_endian
>* ppc_object
5301 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5303 ppc_object
->set_opd_valid();
5304 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5306 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5307 for (p
= ppc_object
->access_from_map()->begin();
5308 p
!= ppc_object
->access_from_map()->end();
5311 Address dst_off
= p
->first
;
5312 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5313 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5314 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5316 Object
* src_obj
= s
->first
;
5317 unsigned int src_indx
= s
->second
;
5318 symtab
->gc()->add_reference(src_obj
, src_indx
,
5319 ppc_object
, dst_indx
);
5323 ppc_object
->access_from_map()->clear();
5324 ppc_object
->process_gc_mark(symtab
);
5325 // Don't look at .opd relocs as .opd will reference everything.
5329 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5330 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5339 needs_special_offset_handling
,
5344 // Handle target specific gc actions when adding a gc reference from
5345 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5346 // and DST_OFF. For powerpc64, this adds a referenc to the code
5347 // section of a function descriptor.
5349 template<int size
, bool big_endian
>
5351 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5352 Symbol_table
* symtab
,
5354 unsigned int src_shndx
,
5356 unsigned int dst_shndx
,
5357 Address dst_off
) const
5359 Powerpc_relobj
<size
, big_endian
>* ppc_object
5360 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5362 && !ppc_object
->is_dynamic()
5363 && dst_shndx
== ppc_object
->opd_shndx())
5365 if (ppc_object
->opd_valid())
5367 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5368 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5372 // If we haven't run scan_opd_relocs, we must delay
5373 // processing this function descriptor reference.
5374 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5379 // Add any special sections for this symbol to the gc work list.
5380 // For powerpc64, this adds the code section of a function
5383 template<int size
, bool big_endian
>
5385 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5386 Symbol_table
* symtab
,
5391 Powerpc_relobj
<size
, big_endian
>* ppc_object
5392 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5394 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5395 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
5397 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5398 Address dst_off
= gsym
->value();
5399 if (ppc_object
->opd_valid())
5401 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5402 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5405 ppc_object
->add_gc_mark(dst_off
);
5410 // Scan relocations for a section.
5412 template<int size
, bool big_endian
>
5414 Target_powerpc
<size
, big_endian
>::scan_relocs(
5415 Symbol_table
* symtab
,
5417 Sized_relobj_file
<size
, big_endian
>* object
,
5418 unsigned int data_shndx
,
5419 unsigned int sh_type
,
5420 const unsigned char* prelocs
,
5422 Output_section
* output_section
,
5423 bool needs_special_offset_handling
,
5424 size_t local_symbol_count
,
5425 const unsigned char* plocal_symbols
)
5427 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5428 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5430 if (sh_type
== elfcpp::SHT_REL
)
5432 gold_error(_("%s: unsupported REL reloc section"),
5433 object
->name().c_str());
5437 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5446 needs_special_offset_handling
,
5451 // Functor class for processing the global symbol table.
5452 // Removes symbols defined on discarded opd entries.
5454 template<bool big_endian
>
5455 class Global_symbol_visitor_opd
5458 Global_symbol_visitor_opd()
5462 operator()(Sized_symbol
<64>* sym
)
5464 if (sym
->has_symtab_index()
5465 || sym
->source() != Symbol::FROM_OBJECT
5466 || !sym
->in_real_elf())
5469 Powerpc_relobj
<64, big_endian
>* symobj
5470 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5471 if (symobj
->is_dynamic()
5472 || symobj
->opd_shndx() == 0)
5476 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5477 if (shndx
== symobj
->opd_shndx()
5478 && symobj
->get_opd_discard(sym
->value()))
5479 sym
->set_symtab_index(-1U);
5483 template<int size
, bool big_endian
>
5485 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5487 Symbol_table
* symtab
)
5491 Output_data_save_res
<64, big_endian
>* savres
5492 = new Output_data_save_res
<64, big_endian
>(symtab
);
5493 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5494 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5495 savres
, ORDER_TEXT
, false);
5499 // Sort linker created .got section first (for the header), then input
5500 // sections belonging to files using small model code.
5502 template<bool big_endian
>
5503 class Sort_toc_sections
5507 operator()(const Output_section::Input_section
& is1
,
5508 const Output_section::Input_section
& is2
) const
5510 if (!is1
.is_input_section() && is2
.is_input_section())
5513 = (is1
.is_input_section()
5514 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
5515 ->has_small_toc_reloc()));
5517 = (is2
.is_input_section()
5518 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
5519 ->has_small_toc_reloc()));
5520 return small1
&& !small2
;
5524 // Finalize the sections.
5526 template<int size
, bool big_endian
>
5528 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
5530 const Input_objects
*,
5531 Symbol_table
* symtab
)
5533 if (parameters
->doing_static_link())
5535 // At least some versions of glibc elf-init.o have a strong
5536 // reference to __rela_iplt marker syms. A weak ref would be
5538 if (this->iplt_
!= NULL
)
5540 Reloc_section
* rel
= this->iplt_
->rel_plt();
5541 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
5542 Symbol_table::PREDEFINED
, rel
, 0, 0,
5543 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5544 elfcpp::STV_HIDDEN
, 0, false, true);
5545 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
5546 Symbol_table::PREDEFINED
, rel
, 0, 0,
5547 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5548 elfcpp::STV_HIDDEN
, 0, true, true);
5552 symtab
->define_as_constant("__rela_iplt_start", NULL
,
5553 Symbol_table::PREDEFINED
, 0, 0,
5554 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5555 elfcpp::STV_HIDDEN
, 0, true, false);
5556 symtab
->define_as_constant("__rela_iplt_end", NULL
,
5557 Symbol_table::PREDEFINED
, 0, 0,
5558 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5559 elfcpp::STV_HIDDEN
, 0, true, false);
5565 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
5566 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
5568 if (!parameters
->options().relocatable())
5570 this->define_save_restore_funcs(layout
, symtab
);
5572 // Annoyingly, we need to make these sections now whether or
5573 // not we need them. If we delay until do_relax then we
5574 // need to mess with the relaxation machinery checkpointing.
5575 this->got_section(symtab
, layout
);
5576 this->make_brlt_section(layout
);
5578 if (parameters
->options().toc_sort())
5580 Output_section
* os
= this->got_
->output_section();
5581 if (os
!= NULL
&& os
->input_sections().size() > 1)
5582 std::stable_sort(os
->input_sections().begin(),
5583 os
->input_sections().end(),
5584 Sort_toc_sections
<big_endian
>());
5589 // Fill in some more dynamic tags.
5590 Output_data_dynamic
* odyn
= layout
->dynamic_data();
5593 const Reloc_section
* rel_plt
= (this->plt_
== NULL
5595 : this->plt_
->rel_plt());
5596 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
5597 this->rela_dyn_
, true, size
== 32);
5601 if (this->got_
!= NULL
)
5603 this->got_
->finalize_data_size();
5604 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
5605 this->got_
, this->got_
->g_o_t());
5610 if (this->glink_
!= NULL
)
5612 this->glink_
->finalize_data_size();
5613 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
5615 (this->glink_
->pltresolve_size
5621 // Emit any relocs we saved in an attempt to avoid generating COPY
5623 if (this->copy_relocs_
.any_saved_relocs())
5624 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
5627 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5631 ok_lo_toc_insn(uint32_t insn
)
5633 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
5634 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5635 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5636 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5637 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5638 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5639 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5640 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5641 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5642 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5643 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5644 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5645 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5646 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5647 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5649 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
5650 && ((insn
& 3) == 0 || (insn
& 3) == 3))
5651 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
5654 // Return the value to use for a branch relocation.
5656 template<int size
, bool big_endian
>
5657 typename
elfcpp::Elf_types
<size
>::Elf_Addr
5658 Target_powerpc
<size
, big_endian
>::symval_for_branch(
5660 const Sized_symbol
<size
>* gsym
,
5661 Powerpc_relobj
<size
, big_endian
>* object
,
5662 unsigned int *dest_shndx
)
5668 // If the symbol is defined in an opd section, ie. is a function
5669 // descriptor, use the function descriptor code entry address
5670 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
5672 && gsym
->source() != Symbol::FROM_OBJECT
)
5675 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5676 unsigned int shndx
= symobj
->opd_shndx();
5679 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
5680 gold_assert(opd_addr
!= invalid_address
);
5681 opd_addr
+= symobj
->output_section(shndx
)->address();
5682 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
5685 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
5686 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
5687 gold_assert(sec_addr
!= invalid_address
);
5688 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
5689 value
= sec_addr
+ sec_off
;
5694 // Perform a relocation.
5696 template<int size
, bool big_endian
>
5698 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
5699 const Relocate_info
<size
, big_endian
>* relinfo
,
5700 Target_powerpc
* target
,
5703 const elfcpp::Rela
<size
, big_endian
>& rela
,
5704 unsigned int r_type
,
5705 const Sized_symbol
<size
>* gsym
,
5706 const Symbol_value
<size
>* psymval
,
5707 unsigned char* view
,
5709 section_size_type view_size
)
5711 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
5713 case Track_tls::NOT_EXPECTED
:
5714 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5715 _("__tls_get_addr call lacks marker reloc"));
5717 case Track_tls::EXPECTED
:
5718 // We have already complained.
5720 case Track_tls::SKIP
:
5722 case Track_tls::NORMAL
:
5726 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
5727 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
5728 Powerpc_relobj
<size
, big_endian
>* const object
5729 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5731 bool has_plt_value
= false;
5732 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5734 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5735 : object
->local_has_plt_offset(r_sym
))
5737 Stub_table
<size
, big_endian
>* stub_table
5738 = object
->stub_table(relinfo
->data_shndx
);
5739 if (stub_table
== NULL
)
5741 // This is a ref from a data section to an ifunc symbol.
5742 if (target
->stub_tables().size() != 0)
5743 stub_table
= target
->stub_tables()[0];
5745 gold_assert(stub_table
!= NULL
);
5748 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
5749 rela
.get_r_addend());
5751 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
5752 rela
.get_r_addend());
5753 gold_assert(off
!= invalid_address
);
5754 value
= stub_table
->stub_address() + off
;
5755 has_plt_value
= true;
5758 if (r_type
== elfcpp::R_POWERPC_GOT16
5759 || r_type
== elfcpp::R_POWERPC_GOT16_LO
5760 || r_type
== elfcpp::R_POWERPC_GOT16_HI
5761 || r_type
== elfcpp::R_POWERPC_GOT16_HA
5762 || r_type
== elfcpp::R_PPC64_GOT16_DS
5763 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
5767 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
5768 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
5772 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5773 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
5774 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
5776 value
-= target
->got_section()->got_base_offset(object
);
5778 else if (r_type
== elfcpp::R_PPC64_TOC
)
5780 value
= (target
->got_section()->output_section()->address()
5781 + object
->toc_base_offset());
5783 else if (gsym
!= NULL
5784 && (r_type
== elfcpp::R_POWERPC_REL24
5785 || r_type
== elfcpp::R_PPC_PLTREL24
)
5790 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
5791 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
5792 bool can_plt_call
= false;
5793 if (rela
.get_r_offset() + 8 <= view_size
)
5795 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5796 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
5799 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
5801 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
5802 can_plt_call
= true;
5807 // If we don't have a branch and link followed by a nop,
5808 // we can't go via the plt because there is no place to
5809 // put a toc restoring instruction.
5810 // Unless we know we won't be returning.
5811 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
5812 can_plt_call
= true;
5816 // This is not an error in one special case: A self
5817 // call. It isn't possible to cheaply verify we have
5818 // such a call so just check for a call to the same
5821 Address code
= value
;
5822 if (gsym
->source() == Symbol::FROM_OBJECT
5823 && gsym
->object() == object
)
5825 Address addend
= rela
.get_r_addend();
5826 unsigned int dest_shndx
;
5827 Address opdent
= psymval
->value(object
, addend
);
5828 code
= target
->symval_for_branch(opdent
, gsym
, object
,
5831 if (dest_shndx
== 0)
5832 dest_shndx
= gsym
->shndx(&is_ordinary
);
5833 ok
= dest_shndx
== relinfo
->data_shndx
;
5837 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5838 _("call lacks nop, can't restore toc; "
5839 "recompile with -fPIC"));
5845 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5846 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5847 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5848 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5850 // First instruction of a global dynamic sequence, arg setup insn.
5851 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5852 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5853 enum Got_type got_type
= GOT_TYPE_STANDARD
;
5854 if (tls_type
== tls::TLSOPT_NONE
)
5855 got_type
= GOT_TYPE_TLSGD
;
5856 else if (tls_type
== tls::TLSOPT_TO_IE
)
5857 got_type
= GOT_TYPE_TPREL
;
5858 if (got_type
!= GOT_TYPE_STANDARD
)
5862 gold_assert(gsym
->has_got_offset(got_type
));
5863 value
= gsym
->got_offset(got_type
);
5867 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5868 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
5869 value
= object
->local_got_offset(r_sym
, got_type
);
5871 value
-= target
->got_section()->got_base_offset(object
);
5873 if (tls_type
== tls::TLSOPT_TO_IE
)
5875 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5876 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5878 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5879 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5880 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
5882 insn
|= 32 << 26; // lwz
5884 insn
|= 58 << 26; // ld
5885 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5887 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5888 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5890 else if (tls_type
== tls::TLSOPT_TO_LE
)
5892 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5893 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5895 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5896 Insn insn
= addis_3_13
;
5899 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5900 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5901 value
= psymval
->value(object
, rela
.get_r_addend());
5905 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5907 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5908 r_type
= elfcpp::R_POWERPC_NONE
;
5912 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5913 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5914 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5915 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5917 // First instruction of a local dynamic sequence, arg setup insn.
5918 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5919 if (tls_type
== tls::TLSOPT_NONE
)
5921 value
= target
->tlsld_got_offset();
5922 value
-= target
->got_section()->got_base_offset(object
);
5926 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5927 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5928 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5930 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5931 Insn insn
= addis_3_13
;
5934 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5935 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5940 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5942 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5943 r_type
= elfcpp::R_POWERPC_NONE
;
5947 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
5948 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
5949 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
5950 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
5952 // Accesses relative to a local dynamic sequence address,
5953 // no optimisation here.
5956 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
5957 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
5961 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5962 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
5963 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
5965 value
-= target
->got_section()->got_base_offset(object
);
5967 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5968 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5969 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5970 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5972 // First instruction of initial exec sequence.
5973 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5974 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5975 if (tls_type
== tls::TLSOPT_NONE
)
5979 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
5980 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
5984 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5985 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
5986 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
5988 value
-= target
->got_section()->got_base_offset(object
);
5992 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5993 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5994 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5996 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5997 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5998 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6003 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6004 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6005 value
= psymval
->value(object
, rela
.get_r_addend());
6009 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6011 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6012 r_type
= elfcpp::R_POWERPC_NONE
;
6016 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6017 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6019 // Second instruction of a global dynamic sequence,
6020 // the __tls_get_addr call
6021 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6022 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6023 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6024 if (tls_type
!= tls::TLSOPT_NONE
)
6026 if (tls_type
== tls::TLSOPT_TO_IE
)
6028 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6029 Insn insn
= add_3_3_13
;
6032 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6033 r_type
= elfcpp::R_POWERPC_NONE
;
6037 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6038 Insn insn
= addi_3_3
;
6039 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6040 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6041 view
+= 2 * big_endian
;
6042 value
= psymval
->value(object
, rela
.get_r_addend());
6044 this->skip_next_tls_get_addr_call();
6047 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6048 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6050 // Second instruction of a local dynamic sequence,
6051 // the __tls_get_addr call
6052 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6053 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6054 if (tls_type
== tls::TLSOPT_TO_LE
)
6056 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6057 Insn insn
= addi_3_3
;
6058 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6059 this->skip_next_tls_get_addr_call();
6060 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6061 view
+= 2 * big_endian
;
6065 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6067 // Second instruction of an initial exec sequence
6068 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6069 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6070 if (tls_type
== tls::TLSOPT_TO_LE
)
6072 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6073 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6074 unsigned int reg
= size
== 32 ? 2 : 13;
6075 insn
= at_tls_transform(insn
, reg
);
6076 gold_assert(insn
!= 0);
6077 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6078 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6079 view
+= 2 * big_endian
;
6080 value
= psymval
->value(object
, rela
.get_r_addend());
6083 else if (!has_plt_value
)
6086 unsigned int dest_shndx
;
6087 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
6088 addend
= rela
.get_r_addend();
6089 value
= psymval
->value(object
, addend
);
6090 if (size
== 64 && is_branch_reloc(r_type
))
6091 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
6092 unsigned int max_branch_offset
= 0;
6093 if (r_type
== elfcpp::R_POWERPC_REL24
6094 || r_type
== elfcpp::R_PPC_PLTREL24
6095 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
6096 max_branch_offset
= 1 << 25;
6097 else if (r_type
== elfcpp::R_POWERPC_REL14
6098 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
6099 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
6100 max_branch_offset
= 1 << 15;
6101 if (max_branch_offset
!= 0
6102 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
6104 Stub_table
<size
, big_endian
>* stub_table
6105 = object
->stub_table(relinfo
->data_shndx
);
6106 gold_assert(stub_table
!= NULL
);
6107 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6108 if (off
!= invalid_address
)
6109 value
= stub_table
->stub_address() + stub_table
->plt_size() + off
;
6115 case elfcpp::R_PPC64_REL64
:
6116 case elfcpp::R_POWERPC_REL32
:
6117 case elfcpp::R_POWERPC_REL24
:
6118 case elfcpp::R_PPC_PLTREL24
:
6119 case elfcpp::R_PPC_LOCAL24PC
:
6120 case elfcpp::R_POWERPC_REL16
:
6121 case elfcpp::R_POWERPC_REL16_LO
:
6122 case elfcpp::R_POWERPC_REL16_HI
:
6123 case elfcpp::R_POWERPC_REL16_HA
:
6124 case elfcpp::R_POWERPC_REL14
:
6125 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6126 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6130 case elfcpp::R_PPC64_TOC16
:
6131 case elfcpp::R_PPC64_TOC16_LO
:
6132 case elfcpp::R_PPC64_TOC16_HI
:
6133 case elfcpp::R_PPC64_TOC16_HA
:
6134 case elfcpp::R_PPC64_TOC16_DS
:
6135 case elfcpp::R_PPC64_TOC16_LO_DS
:
6136 // Subtract the TOC base address.
6137 value
-= (target
->got_section()->output_section()->address()
6138 + object
->toc_base_offset());
6141 case elfcpp::R_POWERPC_SECTOFF
:
6142 case elfcpp::R_POWERPC_SECTOFF_LO
:
6143 case elfcpp::R_POWERPC_SECTOFF_HI
:
6144 case elfcpp::R_POWERPC_SECTOFF_HA
:
6145 case elfcpp::R_PPC64_SECTOFF_DS
:
6146 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6148 value
-= os
->address();
6151 case elfcpp::R_PPC64_TPREL16_DS
:
6152 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6154 // R_PPC_TLSGD and R_PPC_TLSLD
6156 case elfcpp::R_POWERPC_TPREL16
:
6157 case elfcpp::R_POWERPC_TPREL16_LO
:
6158 case elfcpp::R_POWERPC_TPREL16_HI
:
6159 case elfcpp::R_POWERPC_TPREL16_HA
:
6160 case elfcpp::R_POWERPC_TPREL
:
6161 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6162 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6163 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6164 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6165 // tls symbol values are relative to tls_segment()->vaddr()
6169 case elfcpp::R_PPC64_DTPREL16_DS
:
6170 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6171 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6172 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6173 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6174 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6176 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6177 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6179 case elfcpp::R_POWERPC_DTPREL16
:
6180 case elfcpp::R_POWERPC_DTPREL16_LO
:
6181 case elfcpp::R_POWERPC_DTPREL16_HI
:
6182 case elfcpp::R_POWERPC_DTPREL16_HA
:
6183 case elfcpp::R_POWERPC_DTPREL
:
6184 // tls symbol values are relative to tls_segment()->vaddr()
6185 value
-= dtp_offset
;
6192 Insn branch_bit
= 0;
6195 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6196 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6197 branch_bit
= 1 << 21;
6198 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6199 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6201 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6202 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6205 if (this->is_isa_v2
)
6207 // Set 'a' bit. This is 0b00010 in BO field for branch
6208 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6209 // for branch on CTR insns (BO == 1a00t or 1a01t).
6210 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6212 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6219 // Invert 'y' bit if not the default.
6220 if (static_cast<Signed_address
>(value
) < 0)
6223 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6233 // Multi-instruction sequences that access the TOC can be
6234 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6235 // to nop; addi rb,r2,x;
6241 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6242 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6243 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6244 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6245 case elfcpp::R_POWERPC_GOT16_HA
:
6246 case elfcpp::R_PPC64_TOC16_HA
:
6247 if (parameters
->options().toc_optimize())
6249 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6250 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6251 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6252 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6253 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6254 _("toc optimization is not supported "
6255 "for %#08x instruction"), insn
);
6256 else if (value
+ 0x8000 < 0x10000)
6258 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6264 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6265 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6266 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6267 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6268 case elfcpp::R_POWERPC_GOT16_LO
:
6269 case elfcpp::R_PPC64_GOT16_LO_DS
:
6270 case elfcpp::R_PPC64_TOC16_LO
:
6271 case elfcpp::R_PPC64_TOC16_LO_DS
:
6272 if (parameters
->options().toc_optimize())
6274 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6275 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6276 if (!ok_lo_toc_insn(insn
))
6277 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6278 _("toc optimization is not supported "
6279 "for %#08x instruction"), insn
);
6280 else if (value
+ 0x8000 < 0x10000)
6282 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6284 // Transform addic to addi when we change reg.
6285 insn
&= ~((0x3f << 26) | (0x1f << 16));
6286 insn
|= (14u << 26) | (2 << 16);
6290 insn
&= ~(0x1f << 16);
6293 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6300 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6303 case elfcpp::R_POWERPC_ADDR32
:
6304 case elfcpp::R_POWERPC_UADDR32
:
6306 overflow
= Reloc::CHECK_BITFIELD
;
6309 case elfcpp::R_POWERPC_REL32
:
6311 overflow
= Reloc::CHECK_SIGNED
;
6314 case elfcpp::R_POWERPC_ADDR24
:
6315 case elfcpp::R_POWERPC_ADDR16
:
6316 case elfcpp::R_POWERPC_UADDR16
:
6317 case elfcpp::R_PPC64_ADDR16_DS
:
6318 case elfcpp::R_POWERPC_ADDR14
:
6319 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6320 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6321 overflow
= Reloc::CHECK_BITFIELD
;
6324 case elfcpp::R_POWERPC_REL24
:
6325 case elfcpp::R_PPC_PLTREL24
:
6326 case elfcpp::R_PPC_LOCAL24PC
:
6327 case elfcpp::R_POWERPC_REL16
:
6328 case elfcpp::R_PPC64_TOC16
:
6329 case elfcpp::R_POWERPC_GOT16
:
6330 case elfcpp::R_POWERPC_SECTOFF
:
6331 case elfcpp::R_POWERPC_TPREL16
:
6332 case elfcpp::R_POWERPC_DTPREL16
:
6333 case elfcpp::R_PPC64_TPREL16_DS
:
6334 case elfcpp::R_PPC64_DTPREL16_DS
:
6335 case elfcpp::R_PPC64_TOC16_DS
:
6336 case elfcpp::R_PPC64_GOT16_DS
:
6337 case elfcpp::R_PPC64_SECTOFF_DS
:
6338 case elfcpp::R_POWERPC_REL14
:
6339 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6340 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6341 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6342 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6343 case elfcpp::R_POWERPC_GOT_TPREL16
:
6344 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6345 overflow
= Reloc::CHECK_SIGNED
;
6349 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6350 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6353 case elfcpp::R_POWERPC_NONE
:
6354 case elfcpp::R_POWERPC_TLS
:
6355 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6356 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6357 case elfcpp::R_PPC_EMB_MRKREF
:
6360 case elfcpp::R_PPC64_ADDR64
:
6361 case elfcpp::R_PPC64_REL64
:
6362 case elfcpp::R_PPC64_TOC
:
6363 Reloc::addr64(view
, value
);
6366 case elfcpp::R_POWERPC_TPREL
:
6367 case elfcpp::R_POWERPC_DTPREL
:
6369 Reloc::addr64(view
, value
);
6371 status
= Reloc::addr32(view
, value
, overflow
);
6374 case elfcpp::R_PPC64_UADDR64
:
6375 Reloc::addr64_u(view
, value
);
6378 case elfcpp::R_POWERPC_ADDR32
:
6379 status
= Reloc::addr32(view
, value
, overflow
);
6382 case elfcpp::R_POWERPC_REL32
:
6383 case elfcpp::R_POWERPC_UADDR32
:
6384 status
= Reloc::addr32_u(view
, value
, overflow
);
6387 case elfcpp::R_POWERPC_ADDR24
:
6388 case elfcpp::R_POWERPC_REL24
:
6389 case elfcpp::R_PPC_PLTREL24
:
6390 case elfcpp::R_PPC_LOCAL24PC
:
6391 status
= Reloc::addr24(view
, value
, overflow
);
6394 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6395 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6398 status
= Reloc::addr16_ds(view
, value
, overflow
);
6401 case elfcpp::R_POWERPC_ADDR16
:
6402 case elfcpp::R_POWERPC_REL16
:
6403 case elfcpp::R_PPC64_TOC16
:
6404 case elfcpp::R_POWERPC_GOT16
:
6405 case elfcpp::R_POWERPC_SECTOFF
:
6406 case elfcpp::R_POWERPC_TPREL16
:
6407 case elfcpp::R_POWERPC_DTPREL16
:
6408 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6409 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6410 case elfcpp::R_POWERPC_GOT_TPREL16
:
6411 case elfcpp::R_POWERPC_ADDR16_LO
:
6412 case elfcpp::R_POWERPC_REL16_LO
:
6413 case elfcpp::R_PPC64_TOC16_LO
:
6414 case elfcpp::R_POWERPC_GOT16_LO
:
6415 case elfcpp::R_POWERPC_SECTOFF_LO
:
6416 case elfcpp::R_POWERPC_TPREL16_LO
:
6417 case elfcpp::R_POWERPC_DTPREL16_LO
:
6418 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6419 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6420 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6421 status
= Reloc::addr16(view
, value
, overflow
);
6424 case elfcpp::R_POWERPC_UADDR16
:
6425 status
= Reloc::addr16_u(view
, value
, overflow
);
6428 case elfcpp::R_POWERPC_ADDR16_HI
:
6429 case elfcpp::R_POWERPC_REL16_HI
:
6430 case elfcpp::R_PPC64_TOC16_HI
:
6431 case elfcpp::R_POWERPC_GOT16_HI
:
6432 case elfcpp::R_POWERPC_SECTOFF_HI
:
6433 case elfcpp::R_POWERPC_TPREL16_HI
:
6434 case elfcpp::R_POWERPC_DTPREL16_HI
:
6435 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6436 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6437 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6438 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6439 Reloc::addr16_hi(view
, value
);
6442 case elfcpp::R_POWERPC_ADDR16_HA
:
6443 case elfcpp::R_POWERPC_REL16_HA
:
6444 case elfcpp::R_PPC64_TOC16_HA
:
6445 case elfcpp::R_POWERPC_GOT16_HA
:
6446 case elfcpp::R_POWERPC_SECTOFF_HA
:
6447 case elfcpp::R_POWERPC_TPREL16_HA
:
6448 case elfcpp::R_POWERPC_DTPREL16_HA
:
6449 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6450 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6451 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6452 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6453 Reloc::addr16_ha(view
, value
);
6456 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6458 // R_PPC_EMB_NADDR16_LO
6460 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6461 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6462 Reloc::addr16_hi2(view
, value
);
6465 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6467 // R_PPC_EMB_NADDR16_HI
6469 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6470 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6471 Reloc::addr16_ha2(view
, value
);
6474 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6476 // R_PPC_EMB_NADDR16_HA
6478 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6479 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6480 Reloc::addr16_hi3(view
, value
);
6483 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6487 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6488 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6489 Reloc::addr16_ha3(view
, value
);
6492 case elfcpp::R_PPC64_DTPREL16_DS
:
6493 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6495 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6497 case elfcpp::R_PPC64_TPREL16_DS
:
6498 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6500 // R_PPC_TLSGD, R_PPC_TLSLD
6502 case elfcpp::R_PPC64_ADDR16_DS
:
6503 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6504 case elfcpp::R_PPC64_TOC16_DS
:
6505 case elfcpp::R_PPC64_TOC16_LO_DS
:
6506 case elfcpp::R_PPC64_GOT16_DS
:
6507 case elfcpp::R_PPC64_GOT16_LO_DS
:
6508 case elfcpp::R_PPC64_SECTOFF_DS
:
6509 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6510 status
= Reloc::addr16_ds(view
, value
, overflow
);
6513 case elfcpp::R_POWERPC_ADDR14
:
6514 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6515 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6516 case elfcpp::R_POWERPC_REL14
:
6517 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6518 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6519 status
= Reloc::addr14(view
, value
, overflow
);
6522 case elfcpp::R_POWERPC_COPY
:
6523 case elfcpp::R_POWERPC_GLOB_DAT
:
6524 case elfcpp::R_POWERPC_JMP_SLOT
:
6525 case elfcpp::R_POWERPC_RELATIVE
:
6526 case elfcpp::R_POWERPC_DTPMOD
:
6527 case elfcpp::R_PPC64_JMP_IREL
:
6528 case elfcpp::R_POWERPC_IRELATIVE
:
6529 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6530 _("unexpected reloc %u in object file"),
6534 case elfcpp::R_PPC_EMB_SDA21
:
6539 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6543 case elfcpp::R_PPC_EMB_SDA2I16
:
6544 case elfcpp::R_PPC_EMB_SDA2REL
:
6547 // R_PPC64_TLSGD, R_PPC64_TLSLD
6550 case elfcpp::R_POWERPC_PLT32
:
6551 case elfcpp::R_POWERPC_PLTREL32
:
6552 case elfcpp::R_POWERPC_PLT16_LO
:
6553 case elfcpp::R_POWERPC_PLT16_HI
:
6554 case elfcpp::R_POWERPC_PLT16_HA
:
6555 case elfcpp::R_PPC_SDAREL16
:
6556 case elfcpp::R_POWERPC_ADDR30
:
6557 case elfcpp::R_PPC64_PLT64
:
6558 case elfcpp::R_PPC64_PLTREL64
:
6559 case elfcpp::R_PPC64_PLTGOT16
:
6560 case elfcpp::R_PPC64_PLTGOT16_LO
:
6561 case elfcpp::R_PPC64_PLTGOT16_HI
:
6562 case elfcpp::R_PPC64_PLTGOT16_HA
:
6563 case elfcpp::R_PPC64_PLT16_LO_DS
:
6564 case elfcpp::R_PPC64_PLTGOT16_DS
:
6565 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
6566 case elfcpp::R_PPC_EMB_RELSEC16
:
6567 case elfcpp::R_PPC_EMB_RELST_LO
:
6568 case elfcpp::R_PPC_EMB_RELST_HI
:
6569 case elfcpp::R_PPC_EMB_RELST_HA
:
6570 case elfcpp::R_PPC_EMB_BIT_FLD
:
6571 case elfcpp::R_PPC_EMB_RELSDA
:
6572 case elfcpp::R_PPC_TOC16
:
6575 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6576 _("unsupported reloc %u"),
6580 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
6581 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6582 _("relocation overflow"));
6587 // Relocate section data.
6589 template<int size
, bool big_endian
>
6591 Target_powerpc
<size
, big_endian
>::relocate_section(
6592 const Relocate_info
<size
, big_endian
>* relinfo
,
6593 unsigned int sh_type
,
6594 const unsigned char* prelocs
,
6596 Output_section
* output_section
,
6597 bool needs_special_offset_handling
,
6598 unsigned char* view
,
6600 section_size_type view_size
,
6601 const Reloc_symbol_changes
* reloc_symbol_changes
)
6603 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6604 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
6605 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
6606 Powerpc_comdat_behavior
;
6608 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6610 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
6611 Powerpc_relocate
, Powerpc_comdat_behavior
>(
6617 needs_special_offset_handling
,
6621 reloc_symbol_changes
);
6624 class Powerpc_scan_relocatable_reloc
6627 // Return the strategy to use for a local symbol which is not a
6628 // section symbol, given the relocation type.
6629 inline Relocatable_relocs::Reloc_strategy
6630 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
6632 if (r_type
== 0 && r_sym
== 0)
6633 return Relocatable_relocs::RELOC_DISCARD
;
6634 return Relocatable_relocs::RELOC_COPY
;
6637 // Return the strategy to use for a local symbol which is a section
6638 // symbol, given the relocation type.
6639 inline Relocatable_relocs::Reloc_strategy
6640 local_section_strategy(unsigned int, Relobj
*)
6642 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
6645 // Return the strategy to use for a global symbol, given the
6646 // relocation type, the object, and the symbol index.
6647 inline Relocatable_relocs::Reloc_strategy
6648 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
6650 if (r_type
== elfcpp::R_PPC_PLTREL24
)
6651 return Relocatable_relocs::RELOC_SPECIAL
;
6652 return Relocatable_relocs::RELOC_COPY
;
6656 // Scan the relocs during a relocatable link.
6658 template<int size
, bool big_endian
>
6660 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
6661 Symbol_table
* symtab
,
6663 Sized_relobj_file
<size
, big_endian
>* object
,
6664 unsigned int data_shndx
,
6665 unsigned int sh_type
,
6666 const unsigned char* prelocs
,
6668 Output_section
* output_section
,
6669 bool needs_special_offset_handling
,
6670 size_t local_symbol_count
,
6671 const unsigned char* plocal_symbols
,
6672 Relocatable_relocs
* rr
)
6674 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6676 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
6677 Powerpc_scan_relocatable_reloc
>(
6685 needs_special_offset_handling
,
6691 // Emit relocations for a section.
6692 // This is a modified version of the function by the same name in
6693 // target-reloc.h. Using relocate_special_relocatable for
6694 // R_PPC_PLTREL24 would require duplication of the entire body of the
6695 // loop, so we may as well duplicate the whole thing.
6697 template<int size
, bool big_endian
>
6699 Target_powerpc
<size
, big_endian
>::relocate_relocs(
6700 const Relocate_info
<size
, big_endian
>* relinfo
,
6701 unsigned int sh_type
,
6702 const unsigned char* prelocs
,
6704 Output_section
* output_section
,
6705 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
6706 const Relocatable_relocs
* rr
,
6708 Address view_address
,
6710 unsigned char* reloc_view
,
6711 section_size_type reloc_view_size
)
6713 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6715 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
6717 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
6719 const int reloc_size
6720 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
6722 Powerpc_relobj
<size
, big_endian
>* const object
6723 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6724 const unsigned int local_count
= object
->local_symbol_count();
6725 unsigned int got2_shndx
= object
->got2_shndx();
6726 Address got2_addend
= 0;
6727 if (got2_shndx
!= 0)
6729 got2_addend
= object
->get_output_section_offset(got2_shndx
);
6730 gold_assert(got2_addend
!= invalid_address
);
6733 unsigned char* pwrite
= reloc_view
;
6734 bool zap_next
= false;
6735 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
6737 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
6738 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
6741 Reltype
reloc(prelocs
);
6742 Reltype_write
reloc_write(pwrite
);
6744 Address offset
= reloc
.get_r_offset();
6745 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
6746 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
6747 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
6748 const unsigned int orig_r_sym
= r_sym
;
6749 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
6750 = reloc
.get_r_addend();
6751 const Symbol
* gsym
= NULL
;
6755 // We could arrange to discard these and other relocs for
6756 // tls optimised sequences in the strategy methods, but for
6757 // now do as BFD ld does.
6758 r_type
= elfcpp::R_POWERPC_NONE
;
6762 // Get the new symbol index.
6763 if (r_sym
< local_count
)
6767 case Relocatable_relocs::RELOC_COPY
:
6768 case Relocatable_relocs::RELOC_SPECIAL
:
6771 r_sym
= object
->symtab_index(r_sym
);
6772 gold_assert(r_sym
!= -1U);
6776 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
6778 // We are adjusting a section symbol. We need to find
6779 // the symbol table index of the section symbol for
6780 // the output section corresponding to input section
6781 // in which this symbol is defined.
6782 gold_assert(r_sym
< local_count
);
6784 unsigned int shndx
=
6785 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
6786 gold_assert(is_ordinary
);
6787 Output_section
* os
= object
->output_section(shndx
);
6788 gold_assert(os
!= NULL
);
6789 gold_assert(os
->needs_symtab_index());
6790 r_sym
= os
->symtab_index();
6800 gsym
= object
->global_symbol(r_sym
);
6801 gold_assert(gsym
!= NULL
);
6802 if (gsym
->is_forwarder())
6803 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
6805 gold_assert(gsym
->has_symtab_index());
6806 r_sym
= gsym
->symtab_index();
6809 // Get the new offset--the location in the output section where
6810 // this relocation should be applied.
6811 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6812 offset
+= offset_in_output_section
;
6815 section_offset_type sot_offset
=
6816 convert_types
<section_offset_type
, Address
>(offset
);
6817 section_offset_type new_sot_offset
=
6818 output_section
->output_offset(object
, relinfo
->data_shndx
,
6820 gold_assert(new_sot_offset
!= -1);
6821 offset
= new_sot_offset
;
6824 // In an object file, r_offset is an offset within the section.
6825 // In an executable or dynamic object, generated by
6826 // --emit-relocs, r_offset is an absolute address.
6827 if (!parameters
->options().relocatable())
6829 offset
+= view_address
;
6830 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6831 offset
-= offset_in_output_section
;
6834 // Handle the reloc addend based on the strategy.
6835 if (strategy
== Relocatable_relocs::RELOC_COPY
)
6837 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
6839 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
6840 addend
= psymval
->value(object
, addend
);
6842 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
6844 if (addend
>= 32768)
6845 addend
+= got2_addend
;
6850 if (!parameters
->options().relocatable())
6852 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6853 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6854 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6855 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6857 // First instruction of a global dynamic sequence,
6859 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6860 switch (this->optimize_tls_gd(final
))
6862 case tls::TLSOPT_TO_IE
:
6863 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6864 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6866 case tls::TLSOPT_TO_LE
:
6867 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6868 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6869 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6872 r_type
= elfcpp::R_POWERPC_NONE
;
6873 offset
-= 2 * big_endian
;
6880 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6881 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6882 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6883 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6885 // First instruction of a local dynamic sequence,
6887 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6889 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6890 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6892 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6893 const Output_section
* os
= relinfo
->layout
->tls_segment()
6895 gold_assert(os
!= NULL
);
6896 gold_assert(os
->needs_symtab_index());
6897 r_sym
= os
->symtab_index();
6898 addend
= dtp_offset
;
6902 r_type
= elfcpp::R_POWERPC_NONE
;
6903 offset
-= 2 * big_endian
;
6907 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6908 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6909 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6910 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6912 // First instruction of initial exec sequence.
6913 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6914 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6916 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6917 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6918 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6921 r_type
= elfcpp::R_POWERPC_NONE
;
6922 offset
-= 2 * big_endian
;
6926 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6927 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6929 // Second instruction of a global dynamic sequence,
6930 // the __tls_get_addr call
6931 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6932 switch (this->optimize_tls_gd(final
))
6934 case tls::TLSOPT_TO_IE
:
6935 r_type
= elfcpp::R_POWERPC_NONE
;
6938 case tls::TLSOPT_TO_LE
:
6939 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6940 offset
+= 2 * big_endian
;
6947 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6948 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6950 // Second instruction of a local dynamic sequence,
6951 // the __tls_get_addr call
6952 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6954 const Output_section
* os
= relinfo
->layout
->tls_segment()
6956 gold_assert(os
!= NULL
);
6957 gold_assert(os
->needs_symtab_index());
6958 r_sym
= os
->symtab_index();
6959 addend
= dtp_offset
;
6960 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6961 offset
+= 2 * big_endian
;
6965 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6967 // Second instruction of an initial exec sequence
6968 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6969 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6971 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6972 offset
+= 2 * big_endian
;
6977 reloc_write
.put_r_offset(offset
);
6978 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
6979 reloc_write
.put_r_addend(addend
);
6981 pwrite
+= reloc_size
;
6984 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
6985 == reloc_view_size
);
6988 // Return the value to use for a dynamic symbol which requires special
6989 // treatment. This is how we support equality comparisons of function
6990 // pointers across shared library boundaries, as described in the
6991 // processor specific ABI supplement.
6993 template<int size
, bool big_endian
>
6995 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
6999 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7000 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7001 p
!= this->stub_tables_
.end();
7004 Address off
= (*p
)->find_plt_call_entry(gsym
);
7005 if (off
!= invalid_address
)
7006 return (*p
)->stub_address() + off
;
7012 // Return the PLT address to use for a local symbol.
7013 template<int size
, bool big_endian
>
7015 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
7016 const Relobj
* object
,
7017 unsigned int symndx
) const
7021 const Sized_relobj
<size
, big_endian
>* relobj
7022 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
7023 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7024 p
!= this->stub_tables_
.end();
7027 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
7029 if (off
!= invalid_address
)
7030 return (*p
)->stub_address() + off
;
7036 // Return the PLT address to use for a global symbol.
7037 template<int size
, bool big_endian
>
7039 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
7040 const Symbol
* gsym
) const
7044 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7045 p
!= this->stub_tables_
.end();
7048 Address off
= (*p
)->find_plt_call_entry(gsym
);
7049 if (off
!= invalid_address
)
7050 return (*p
)->stub_address() + off
;
7056 // Return the offset to use for the GOT_INDX'th got entry which is
7057 // for a local tls symbol specified by OBJECT, SYMNDX.
7058 template<int size
, bool big_endian
>
7060 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
7061 const Relobj
* object
,
7062 unsigned int symndx
,
7063 unsigned int got_indx
) const
7065 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7066 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
7067 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
7069 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7070 got_type
<= GOT_TYPE_TPREL
;
7071 got_type
= Got_type(got_type
+ 1))
7072 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
7074 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
7075 if (got_type
== GOT_TYPE_TLSGD
)
7077 if (off
== got_indx
* (size
/ 8))
7079 if (got_type
== GOT_TYPE_TPREL
)
7089 // Return the offset to use for the GOT_INDX'th got entry which is
7090 // for global tls symbol GSYM.
7091 template<int size
, bool big_endian
>
7093 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
7095 unsigned int got_indx
) const
7097 if (gsym
->type() == elfcpp::STT_TLS
)
7099 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7100 got_type
<= GOT_TYPE_TPREL
;
7101 got_type
= Got_type(got_type
+ 1))
7102 if (gsym
->has_got_offset(got_type
))
7104 unsigned int off
= gsym
->got_offset(got_type
);
7105 if (got_type
== GOT_TYPE_TLSGD
)
7107 if (off
== got_indx
* (size
/ 8))
7109 if (got_type
== GOT_TYPE_TPREL
)
7119 // The selector for powerpc object files.
7121 template<int size
, bool big_endian
>
7122 class Target_selector_powerpc
: public Target_selector
7125 Target_selector_powerpc()
7126 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7129 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7130 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7132 ? (big_endian
? "elf64ppc" : "elf64lppc")
7133 : (big_endian
? "elf32ppc" : "elf32lppc")))
7137 do_instantiate_target()
7138 { return new Target_powerpc
<size
, big_endian
>(); }
7141 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7142 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7143 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7144 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7146 // Instantiate these constants for -O0
7147 template<int size
, bool big_endian
>
7148 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7149 template<int size
, bool big_endian
>
7150 const typename Stub_table
<size
, big_endian
>::Address
7151 Stub_table
<size
, big_endian
>::invalid_address
;
7152 template<int size
, bool big_endian
>
7153 const typename Target_powerpc
<size
, big_endian
>::Address
7154 Target_powerpc
<size
, big_endian
>::invalid_address
;
7156 } // End anonymous namespace.