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), opd_valid_(false), opd_ent_(), access_from_map_()
80 // The .got2 section shndx.
85 return this->special_
;
90 // The .opd section shndx.
97 return this->special_
;
100 // Init OPD entry arrays.
102 init_opd(size_t opd_size
)
104 size_t count
= this->opd_ent_ndx(opd_size
);
105 this->opd_ent_
.resize(count
);
108 // Return section and offset of function entry for .opd + R_OFF.
110 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
112 size_t ndx
= this->opd_ent_ndx(r_off
);
113 gold_assert(ndx
< this->opd_ent_
.size());
114 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
116 *value
= this->opd_ent_
[ndx
].off
;
117 return this->opd_ent_
[ndx
].shndx
;
120 // Set section and offset of function entry for .opd + R_OFF.
122 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
124 size_t ndx
= this->opd_ent_ndx(r_off
);
125 gold_assert(ndx
< this->opd_ent_
.size());
126 this->opd_ent_
[ndx
].shndx
= shndx
;
127 this->opd_ent_
[ndx
].off
= value
;
130 // Return discard flag for .opd + R_OFF.
132 get_opd_discard(Address r_off
) const
134 size_t ndx
= this->opd_ent_ndx(r_off
);
135 gold_assert(ndx
< this->opd_ent_
.size());
136 return this->opd_ent_
[ndx
].discard
;
139 // Set discard flag for .opd + R_OFF.
141 set_opd_discard(Address r_off
)
143 size_t ndx
= this->opd_ent_ndx(r_off
);
144 gold_assert(ndx
< this->opd_ent_
.size());
145 this->opd_ent_
[ndx
].discard
= true;
150 { return &this->access_from_map_
; }
152 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
153 // section at DST_OFF.
155 add_reference(Object
* src_obj
,
156 unsigned int src_indx
,
157 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
159 Section_id
src_id(src_obj
, src_indx
);
160 this->access_from_map_
[dst_off
].insert(src_id
);
163 // Add a reference to the code section specified by the .opd entry
166 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
168 size_t ndx
= this->opd_ent_ndx(dst_off
);
169 if (ndx
>= this->opd_ent_
.size())
170 this->opd_ent_
.resize(ndx
+ 1);
171 this->opd_ent_
[ndx
].gc_mark
= true;
175 process_gc_mark(Symbol_table
* symtab
)
177 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
178 if (this->opd_ent_
[i
].gc_mark
)
180 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
181 symtab
->gc()->worklist().push(Section_id(this, shndx
));
187 { return this->opd_valid_
; }
191 { this->opd_valid_
= true; }
193 // Examine .rela.opd to build info about function entry points.
195 scan_opd_relocs(size_t reloc_count
,
196 const unsigned char* prelocs
,
197 const unsigned char* plocal_syms
);
199 // Perform the Sized_relobj_file method, then set up opd info from
202 do_read_relocs(Read_relocs_data
*);
205 do_find_special_sections(Read_symbols_data
* sd
);
207 // Adjust this local symbol value. Return false if the symbol
208 // should be discarded from the output file.
210 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
212 if (size
== 64 && this->opd_shndx() != 0)
215 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
217 if (this->get_opd_discard(lv
->input_value()))
223 // Return offset in output GOT section that this object will use
224 // as a TOC pointer. Won't be just a constant with multi-toc support.
226 toc_base_offset() const
230 set_has_14bit_branch(unsigned int shndx
)
232 if (shndx
>= this->has14_
.size())
233 this->has14_
.resize(shndx
+ 1);
234 this->has14_
[shndx
] = true;
238 has_14bit_branch(unsigned int shndx
) const
239 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
242 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
244 if (shndx
>= this->stub_table_
.size())
245 this->stub_table_
.resize(shndx
+ 1);
246 this->stub_table_
[shndx
] = stub_table
;
249 Stub_table
<size
, big_endian
>*
250 stub_table(unsigned int shndx
)
252 if (shndx
< this->stub_table_
.size())
253 return this->stub_table_
[shndx
];
266 // Return index into opd_ent_ array for .opd entry at OFF.
267 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
268 // apart when the language doesn't use the last 8-byte word, the
269 // environment pointer. Thus dividing the entry section offset by
270 // 16 will give an index into opd_ent_ that works for either layout
271 // of .opd. (It leaves some elements of the vector unused when .opd
272 // entries are spaced 24 bytes apart, but we don't know the spacing
273 // until relocations are processed, and in any case it is possible
274 // for an object to have some entries spaced 16 bytes apart and
275 // others 24 bytes apart.)
277 opd_ent_ndx(size_t off
) const
280 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
281 unsigned int special_
;
283 // Set at the start of gc_process_relocs, when we know opd_ent_
284 // vector is valid. The flag could be made atomic and set in
285 // do_read_relocs with memory_order_release and then tested with
286 // memory_order_acquire, potentially resulting in fewer entries in
290 // The first 8-byte word of an OPD entry gives the address of the
291 // entry point of the function. Relocatable object files have a
292 // relocation on this word. The following vector records the
293 // section and offset specified by these relocations.
294 std::vector
<Opd_ent
> opd_ent_
;
296 // References made to this object's .opd section when running
297 // gc_process_relocs for another object, before the opd_ent_ vector
298 // is valid for this object.
299 Access_from access_from_map_
;
301 // Whether input section has a 14-bit branch reloc.
302 std::vector
<bool> has14_
;
304 // The stub table to use for a given input section.
305 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
308 template<int size
, bool big_endian
>
309 class Target_powerpc
: public Sized_target
<size
, big_endian
>
313 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
314 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
315 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
316 static const Address invalid_address
= static_cast<Address
>(0) - 1;
317 // Offset of tp and dtp pointers from start of TLS block.
318 static const Address tp_offset
= 0x7000;
319 static const Address dtp_offset
= 0x8000;
322 : Sized_target
<size
, big_endian
>(&powerpc_info
),
323 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
324 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
325 dynbss_(NULL
), tlsld_got_offset_(-1U),
326 stub_tables_(), branch_lookup_table_(), branch_info_(),
327 plt_thread_safe_(false)
331 // Process the relocations to determine unreferenced sections for
332 // garbage collection.
334 gc_process_relocs(Symbol_table
* symtab
,
336 Sized_relobj_file
<size
, big_endian
>* object
,
337 unsigned int data_shndx
,
338 unsigned int sh_type
,
339 const unsigned char* prelocs
,
341 Output_section
* output_section
,
342 bool needs_special_offset_handling
,
343 size_t local_symbol_count
,
344 const unsigned char* plocal_symbols
);
346 // Scan the relocations to look for symbol adjustments.
348 scan_relocs(Symbol_table
* symtab
,
350 Sized_relobj_file
<size
, big_endian
>* object
,
351 unsigned int data_shndx
,
352 unsigned int sh_type
,
353 const unsigned char* prelocs
,
355 Output_section
* output_section
,
356 bool needs_special_offset_handling
,
357 size_t local_symbol_count
,
358 const unsigned char* plocal_symbols
);
360 // Map input .toc section to output .got section.
362 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
364 if (size
== 64 && strcmp(name
, ".toc") == 0)
372 // Provide linker defined save/restore functions.
374 define_save_restore_funcs(Layout
*, Symbol_table
*);
376 // No stubs unless a final link.
379 { return !parameters
->options().relocatable(); }
382 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
384 // Stash info about branches, for stub generation.
386 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
387 unsigned int data_shndx
, Address r_offset
,
388 unsigned int r_type
, unsigned int r_sym
, Address addend
)
390 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
391 this->branch_info_
.push_back(info
);
392 if (r_type
== elfcpp::R_POWERPC_REL14
393 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
394 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
395 ppc_object
->set_has_14bit_branch(data_shndx
);
398 Stub_table
<size
, big_endian
>*
402 do_define_standard_symbols(Symbol_table
*, Layout
*);
404 // Finalize the sections.
406 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
408 // Return the value to use for a dynamic which requires special
411 do_dynsym_value(const Symbol
*) const;
413 // Return the PLT address to use for a local symbol.
415 do_plt_address_for_local(const Relobj
*, unsigned int) const;
417 // Return the PLT address to use for a global symbol.
419 do_plt_address_for_global(const Symbol
*) const;
421 // Return the offset to use for the GOT_INDX'th got entry which is
422 // for a local tls symbol specified by OBJECT, SYMNDX.
424 do_tls_offset_for_local(const Relobj
* object
,
426 unsigned int got_indx
) const;
428 // Return the offset to use for the GOT_INDX'th got entry which is
429 // for global tls symbol GSYM.
431 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
433 // Relocate a section.
435 relocate_section(const Relocate_info
<size
, big_endian
>*,
436 unsigned int sh_type
,
437 const unsigned char* prelocs
,
439 Output_section
* output_section
,
440 bool needs_special_offset_handling
,
442 Address view_address
,
443 section_size_type view_size
,
444 const Reloc_symbol_changes
*);
446 // Scan the relocs during a relocatable link.
448 scan_relocatable_relocs(Symbol_table
* symtab
,
450 Sized_relobj_file
<size
, big_endian
>* object
,
451 unsigned int data_shndx
,
452 unsigned int sh_type
,
453 const unsigned char* prelocs
,
455 Output_section
* output_section
,
456 bool needs_special_offset_handling
,
457 size_t local_symbol_count
,
458 const unsigned char* plocal_symbols
,
459 Relocatable_relocs
*);
461 // Emit relocations for a section.
463 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
464 unsigned int sh_type
,
465 const unsigned char* prelocs
,
467 Output_section
* output_section
,
468 typename
elfcpp::Elf_types
<size
>::Elf_Off
469 offset_in_output_section
,
470 const Relocatable_relocs
*,
472 Address view_address
,
474 unsigned char* reloc_view
,
475 section_size_type reloc_view_size
);
477 // Return whether SYM is defined by the ABI.
479 do_is_defined_by_abi(const Symbol
* sym
) const
481 return strcmp(sym
->name(), "__tls_get_addr") == 0;
484 // Return the size of the GOT section.
488 gold_assert(this->got_
!= NULL
);
489 return this->got_
->data_size();
492 // Get the PLT section.
493 const Output_data_plt_powerpc
<size
, big_endian
>*
496 gold_assert(this->plt_
!= NULL
);
500 // Get the IPLT section.
501 const Output_data_plt_powerpc
<size
, big_endian
>*
504 gold_assert(this->iplt_
!= NULL
);
508 // Get the .glink section.
509 const Output_data_glink
<size
, big_endian
>*
510 glink_section() const
512 gold_assert(this->glink_
!= NULL
);
516 // Get the GOT section.
517 const Output_data_got_powerpc
<size
, big_endian
>*
520 gold_assert(this->got_
!= NULL
);
524 // Get the GOT section, creating it if necessary.
525 Output_data_got_powerpc
<size
, big_endian
>*
526 got_section(Symbol_table
*, Layout
*);
529 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
530 const elfcpp::Ehdr
<size
, big_endian
>&);
532 // Return the number of entries in the GOT.
534 got_entry_count() const
536 if (this->got_
== NULL
)
538 return this->got_size() / (size
/ 8);
541 // Return the number of entries in the PLT.
543 plt_entry_count() const;
545 // Return the offset of the first non-reserved PLT entry.
547 first_plt_entry_offset() const;
549 // Return the size of each PLT entry.
551 plt_entry_size() const;
553 // Add any special sections for this symbol to the gc work list.
554 // For powerpc64, this adds the code section of a function
557 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
559 // Handle target specific gc actions when adding a gc reference from
560 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
561 // and DST_OFF. For powerpc64, this adds a referenc to the code
562 // section of a function descriptor.
564 do_gc_add_reference(Symbol_table
* symtab
,
566 unsigned int src_shndx
,
568 unsigned int dst_shndx
,
569 Address dst_off
) const;
571 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
574 { return this->stub_tables_
; }
576 const Output_data_brlt_powerpc
<size
, big_endian
>*
578 { return this->brlt_section_
; }
581 add_branch_lookup_table(Address to
)
583 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
584 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
588 find_branch_lookup_table(Address to
)
590 typename
Branch_lookup_table::const_iterator p
591 = this->branch_lookup_table_
.find(to
);
592 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
596 write_branch_lookup_table(unsigned char *oview
)
598 for (typename
Branch_lookup_table::const_iterator p
599 = this->branch_lookup_table_
.begin();
600 p
!= this->branch_lookup_table_
.end();
603 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
608 plt_thread_safe() const
609 { return this->plt_thread_safe_
; }
613 // The class which scans relocations.
617 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
620 : issued_non_pic_error_(false)
624 get_reference_flags(unsigned int r_type
);
627 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
628 Sized_relobj_file
<size
, big_endian
>* object
,
629 unsigned int data_shndx
,
630 Output_section
* output_section
,
631 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
632 const elfcpp::Sym
<size
, big_endian
>& lsym
,
636 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
637 Sized_relobj_file
<size
, big_endian
>* object
,
638 unsigned int data_shndx
,
639 Output_section
* output_section
,
640 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
644 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
646 Sized_relobj_file
<size
, big_endian
>* ,
649 const elfcpp::Rela
<size
, big_endian
>& ,
651 const elfcpp::Sym
<size
, big_endian
>&)
655 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
657 Sized_relobj_file
<size
, big_endian
>* ,
660 const elfcpp::Rela
<size
,
662 unsigned int , Symbol
*)
667 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
668 unsigned int r_type
);
671 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
672 unsigned int r_type
, Symbol
*);
675 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
676 Target_powerpc
* target
);
679 check_non_pic(Relobj
*, unsigned int r_type
);
682 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
683 unsigned int r_type
);
685 // Whether we have issued an error about a non-PIC compilation.
686 bool issued_non_pic_error_
;
690 symval_for_branch(Address value
, const Sized_symbol
<size
>* gsym
,
691 Powerpc_relobj
<size
, big_endian
>* object
,
692 unsigned int *dest_shndx
);
694 // The class which implements relocation.
698 // Use 'at' branch hints when true, 'y' when false.
699 // FIXME maybe: set this with an option.
700 static const bool is_isa_v2
= true;
704 CALL_NOT_EXPECTED
= 0,
710 : call_tls_get_addr_(CALL_NOT_EXPECTED
)
715 if (this->call_tls_get_addr_
!= CALL_NOT_EXPECTED
)
717 // FIXME: This needs to specify the location somehow.
718 gold_error(_("missing expected __tls_get_addr call"));
722 // Do a relocation. Return false if the caller should not issue
723 // any warnings about this relocation.
725 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
726 Output_section
*, size_t relnum
,
727 const elfcpp::Rela
<size
, big_endian
>&,
728 unsigned int r_type
, const Sized_symbol
<size
>*,
729 const Symbol_value
<size
>*,
731 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
734 // This is set if we should skip the next reloc, which should be a
735 // call to __tls_get_addr.
736 enum skip_tls call_tls_get_addr_
;
739 class Relocate_comdat_behavior
742 // Decide what the linker should do for relocations that refer to
743 // discarded comdat sections.
744 inline Comdat_behavior
745 get(const char* name
)
747 gold::Default_comdat_behavior default_behavior
;
748 Comdat_behavior ret
= default_behavior
.get(name
);
749 if (ret
== CB_WARNING
)
752 && (strcmp(name
, ".fixup") == 0
753 || strcmp(name
, ".got2") == 0))
756 && (strcmp(name
, ".opd") == 0
757 || strcmp(name
, ".toc") == 0
758 || strcmp(name
, ".toc1") == 0))
765 // A class which returns the size required for a relocation type,
766 // used while scanning relocs during a relocatable link.
767 class Relocatable_size_for_reloc
771 get_size_for_reloc(unsigned int, Relobj
*)
778 // Optimize the TLS relocation type based on what we know about the
779 // symbol. IS_FINAL is true if the final address of this symbol is
780 // known at link time.
782 tls::Tls_optimization
783 optimize_tls_gd(bool is_final
)
785 // If we are generating a shared library, then we can't do anything
787 if (parameters
->options().shared())
788 return tls::TLSOPT_NONE
;
791 return tls::TLSOPT_TO_IE
;
792 return tls::TLSOPT_TO_LE
;
795 tls::Tls_optimization
798 if (parameters
->options().shared())
799 return tls::TLSOPT_NONE
;
801 return tls::TLSOPT_TO_LE
;
804 tls::Tls_optimization
805 optimize_tls_ie(bool is_final
)
807 if (!is_final
|| parameters
->options().shared())
808 return tls::TLSOPT_NONE
;
810 return tls::TLSOPT_TO_LE
;
815 make_glink_section(Layout
*);
817 // Create the PLT section.
819 make_plt_section(Symbol_table
*, Layout
*);
822 make_iplt_section(Symbol_table
*, Layout
*);
825 make_brlt_section(Layout
*);
827 // Create a PLT entry for a global symbol.
829 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
831 // Create a PLT entry for a local IFUNC symbol.
833 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
834 Sized_relobj_file
<size
, big_endian
>*,
838 // Create a GOT entry for local dynamic __tls_get_addr.
840 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
841 Sized_relobj_file
<size
, big_endian
>* object
);
844 tlsld_got_offset() const
846 return this->tlsld_got_offset_
;
849 // Get the dynamic reloc section, creating it if necessary.
851 rela_dyn_section(Layout
*);
853 // Copy a relocation against a global symbol.
855 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
856 Sized_relobj_file
<size
, big_endian
>* object
,
857 unsigned int shndx
, Output_section
* output_section
,
858 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
860 this->copy_relocs_
.copy_reloc(symtab
, layout
,
861 symtab
->get_sized_symbol
<size
>(sym
),
862 object
, shndx
, output_section
,
863 reloc
, this->rela_dyn_section(layout
));
866 // Look over all the input sections, deciding where to place stub.
868 group_sections(Layout
*, const Task
*);
870 // Sort output sections by address.
874 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
875 { return sec1
->address() < sec2
->address(); }
881 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
882 unsigned int data_shndx
,
887 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
888 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
894 // If this branch needs a plt call stub, or a long branch stub, make one.
896 make_stub(Stub_table
<size
, big_endian
>*,
897 Stub_table
<size
, big_endian
>*,
898 Symbol_table
*) const;
901 // The branch location..
902 Powerpc_relobj
<size
, big_endian
>* object_
;
905 // ..and the branch type and destination.
906 unsigned int r_type_
;
911 // Information about this specific target which we pass to the
912 // general Target structure.
913 static Target::Target_info powerpc_info
;
915 // The types of GOT entries needed for this platform.
916 // These values are exposed to the ABI in an incremental link.
917 // Do not renumber existing values without changing the version
918 // number of the .gnu_incremental_inputs section.
922 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
923 GOT_TYPE_DTPREL
, // entry for @got@dtprel
924 GOT_TYPE_TPREL
// entry for @got@tprel
928 Output_data_got_powerpc
<size
, big_endian
>* got_
;
930 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
932 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
933 // Section holding long branch destinations.
934 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
935 // The .glink section.
936 Output_data_glink
<size
, big_endian
>* glink_
;
937 // The dynamic reloc section.
938 Reloc_section
* rela_dyn_
;
939 // Relocs saved to avoid a COPY reloc.
940 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
941 // Space for variables copied with a COPY reloc.
942 Output_data_space
* dynbss_
;
943 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
944 unsigned int tlsld_got_offset_
;
946 Stub_tables stub_tables_
;
947 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
948 Branch_lookup_table branch_lookup_table_
;
950 typedef std::vector
<Branch_info
> Branches
;
951 Branches branch_info_
;
953 bool plt_thread_safe_
;
957 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
960 true, // is_big_endian
961 elfcpp::EM_PPC
, // machine_code
962 false, // has_make_symbol
963 false, // has_resolve
964 false, // has_code_fill
965 true, // is_default_stack_executable
966 false, // can_icf_inline_merge_sections
968 "/usr/lib/ld.so.1", // dynamic_linker
969 0x10000000, // default_text_segment_address
970 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
971 4 * 1024, // common_pagesize (overridable by -z common-page-size)
972 false, // isolate_execinstr
974 elfcpp::SHN_UNDEF
, // small_common_shndx
975 elfcpp::SHN_UNDEF
, // large_common_shndx
976 0, // small_common_section_flags
977 0, // large_common_section_flags
978 NULL
, // attributes_section
979 NULL
// attributes_vendor
983 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
986 false, // is_big_endian
987 elfcpp::EM_PPC
, // machine_code
988 false, // has_make_symbol
989 false, // has_resolve
990 false, // has_code_fill
991 true, // is_default_stack_executable
992 false, // can_icf_inline_merge_sections
994 "/usr/lib/ld.so.1", // dynamic_linker
995 0x10000000, // default_text_segment_address
996 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
997 4 * 1024, // common_pagesize (overridable by -z common-page-size)
998 false, // isolate_execinstr
1000 elfcpp::SHN_UNDEF
, // small_common_shndx
1001 elfcpp::SHN_UNDEF
, // large_common_shndx
1002 0, // small_common_section_flags
1003 0, // large_common_section_flags
1004 NULL
, // attributes_section
1005 NULL
// attributes_vendor
1009 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1012 true, // is_big_endian
1013 elfcpp::EM_PPC64
, // machine_code
1014 false, // has_make_symbol
1015 false, // has_resolve
1016 false, // has_code_fill
1017 true, // is_default_stack_executable
1018 false, // can_icf_inline_merge_sections
1020 "/usr/lib/ld.so.1", // dynamic_linker
1021 0x10000000, // default_text_segment_address
1022 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1023 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1024 false, // isolate_execinstr
1026 elfcpp::SHN_UNDEF
, // small_common_shndx
1027 elfcpp::SHN_UNDEF
, // large_common_shndx
1028 0, // small_common_section_flags
1029 0, // large_common_section_flags
1030 NULL
, // attributes_section
1031 NULL
// attributes_vendor
1035 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1038 false, // is_big_endian
1039 elfcpp::EM_PPC64
, // machine_code
1040 false, // has_make_symbol
1041 false, // has_resolve
1042 false, // has_code_fill
1043 true, // is_default_stack_executable
1044 false, // can_icf_inline_merge_sections
1046 "/usr/lib/ld.so.1", // dynamic_linker
1047 0x10000000, // default_text_segment_address
1048 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1049 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1050 false, // isolate_execinstr
1052 elfcpp::SHN_UNDEF
, // small_common_shndx
1053 elfcpp::SHN_UNDEF
, // large_common_shndx
1054 0, // small_common_section_flags
1055 0, // large_common_section_flags
1056 NULL
, // attributes_section
1057 NULL
// attributes_vendor
1061 is_branch_reloc(unsigned int r_type
)
1063 return (r_type
== elfcpp::R_POWERPC_REL24
1064 || r_type
== elfcpp::R_PPC_PLTREL24
1065 || r_type
== elfcpp::R_PPC_LOCAL24PC
1066 || r_type
== elfcpp::R_POWERPC_REL14
1067 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1068 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1069 || r_type
== elfcpp::R_POWERPC_ADDR24
1070 || r_type
== elfcpp::R_POWERPC_ADDR14
1071 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1072 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1075 // If INSN is an opcode that may be used with an @tls operand, return
1076 // the transformed insn for TLS optimisation, otherwise return 0. If
1077 // REG is non-zero only match an insn with RB or RA equal to REG.
1079 at_tls_transform(uint32_t insn
, unsigned int reg
)
1081 if ((insn
& (0x3f << 26)) != 31 << 26)
1085 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1086 rtra
= insn
& ((1 << 26) - (1 << 16));
1087 else if (((insn
>> 16) & 0x1f) == reg
)
1088 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1092 if ((insn
& (0x3ff << 1)) == 266 << 1)
1095 else if ((insn
& (0x1f << 1)) == 23 << 1
1096 && ((insn
& (0x1f << 6)) < 14 << 6
1097 || ((insn
& (0x1f << 6)) >= 16 << 6
1098 && (insn
& (0x1f << 6)) < 24 << 6)))
1099 // load and store indexed -> dform
1100 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1101 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1102 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1103 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1104 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1106 insn
= (58 << 26) | 2;
1113 // Modified version of symtab.h class Symbol member
1114 // Given a direct absolute or pc-relative static relocation against
1115 // the global symbol, this function returns whether a dynamic relocation
1120 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1122 // No dynamic relocations in a static link!
1123 if (parameters
->doing_static_link())
1126 // A reference to an undefined symbol from an executable should be
1127 // statically resolved to 0, and does not need a dynamic relocation.
1128 // This matches gnu ld behavior.
1129 if (gsym
->is_undefined() && !parameters
->options().shared())
1132 // A reference to an absolute symbol does not need a dynamic relocation.
1133 if (gsym
->is_absolute())
1136 // An absolute reference within a position-independent output file
1137 // will need a dynamic relocation.
1138 if ((flags
& Symbol::ABSOLUTE_REF
)
1139 && parameters
->options().output_is_position_independent())
1142 // A function call that can branch to a local PLT entry does not need
1143 // a dynamic relocation.
1144 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1147 // A reference to any PLT entry in a non-position-independent executable
1148 // does not need a dynamic relocation.
1149 // Except due to having function descriptors on powerpc64 we don't define
1150 // functions to their plt code in an executable, so this doesn't apply.
1152 && !parameters
->options().output_is_position_independent()
1153 && gsym
->has_plt_offset())
1156 // A reference to a symbol defined in a dynamic object or to a
1157 // symbol that is preemptible will need a dynamic relocation.
1158 if (gsym
->is_from_dynobj()
1159 || gsym
->is_undefined()
1160 || gsym
->is_preemptible())
1163 // For all other cases, return FALSE.
1167 // Modified version of symtab.h class Symbol member
1168 // Whether we should use the PLT offset associated with a symbol for
1169 // a relocation. FLAGS is a set of Reference_flags.
1173 use_plt_offset(const Symbol
* gsym
, int flags
)
1175 // If the symbol doesn't have a PLT offset, then naturally we
1176 // don't want to use it.
1177 if (!gsym
->has_plt_offset())
1180 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1181 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1184 // If we are going to generate a dynamic relocation, then we will
1185 // wind up using that, so no need to use the PLT entry.
1186 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1189 // If the symbol is from a dynamic object, we need to use the PLT
1191 if (gsym
->is_from_dynobj())
1194 // If we are generating a shared object, and this symbol is
1195 // undefined or preemptible, we need to use the PLT entry.
1196 if (parameters
->options().shared()
1197 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1200 // If this is a call to a weak undefined symbol, we need to use
1201 // the PLT entry; the symbol may be defined by a library loaded
1203 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1206 // Otherwise we can use the regular definition.
1210 template<int size
, bool big_endian
>
1211 class Powerpc_relocate_functions
1228 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1229 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1231 template<int valsize
>
1233 has_overflow_signed(Address value
)
1235 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1236 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1237 limit
<<= ((valsize
- 1) >> 1);
1238 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1239 return value
+ limit
> (limit
<< 1) - 1;
1242 template<int valsize
>
1244 has_overflow_bitfield(Address value
)
1246 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1247 limit
<<= ((valsize
- 1) >> 1);
1248 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1249 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1252 template<int valsize
>
1253 static inline Status
1254 overflowed(Address value
, Overflow_check overflow
)
1256 if (overflow
== CHECK_SIGNED
)
1258 if (has_overflow_signed
<valsize
>(value
))
1259 return STATUS_OVERFLOW
;
1261 else if (overflow
== CHECK_BITFIELD
)
1263 if (has_overflow_bitfield
<valsize
>(value
))
1264 return STATUS_OVERFLOW
;
1269 // Do a simple RELA relocation
1270 template<int valsize
>
1271 static inline Status
1272 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1274 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1275 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1276 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1277 return overflowed
<valsize
>(value
, overflow
);
1280 template<int valsize
>
1281 static inline Status
1282 rela(unsigned char* view
,
1283 unsigned int right_shift
,
1284 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1286 Overflow_check overflow
)
1288 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1289 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1290 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1291 Valtype reloc
= value
>> right_shift
;
1294 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1295 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1298 // Do a simple RELA relocation, unaligned.
1299 template<int valsize
>
1300 static inline Status
1301 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1303 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1304 return overflowed
<valsize
>(value
, overflow
);
1307 template<int valsize
>
1308 static inline Status
1309 rela_ua(unsigned char* view
,
1310 unsigned int right_shift
,
1311 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1313 Overflow_check overflow
)
1315 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1317 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1318 Valtype reloc
= value
>> right_shift
;
1321 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1322 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1326 // R_PPC64_ADDR64: (Symbol + Addend)
1328 addr64(unsigned char* view
, Address value
)
1329 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1331 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1333 addr64_u(unsigned char* view
, Address value
)
1334 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1336 // R_POWERPC_ADDR32: (Symbol + Addend)
1337 static inline Status
1338 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1339 { return This::template rela
<32>(view
, value
, overflow
); }
1341 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1342 static inline Status
1343 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1344 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1346 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1347 static inline Status
1348 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1350 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1351 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1352 stat
= STATUS_OVERFLOW
;
1356 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1357 static inline Status
1358 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1359 { return This::template rela
<16>(view
, value
, overflow
); }
1361 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1362 static inline Status
1363 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1364 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1366 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1367 static inline Status
1368 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1370 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1371 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1372 stat
= STATUS_OVERFLOW
;
1376 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1378 addr16_hi(unsigned char* view
, Address value
)
1379 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1381 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1383 addr16_ha(unsigned char* view
, Address value
)
1384 { This::addr16_hi(view
, value
+ 0x8000); }
1386 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1388 addr16_hi2(unsigned char* view
, Address value
)
1389 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1391 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1393 addr16_ha2(unsigned char* view
, Address value
)
1394 { This::addr16_hi2(view
, value
+ 0x8000); }
1396 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1398 addr16_hi3(unsigned char* view
, Address value
)
1399 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1401 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1403 addr16_ha3(unsigned char* view
, Address value
)
1404 { This::addr16_hi3(view
, value
+ 0x8000); }
1406 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1407 static inline Status
1408 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1410 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1411 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1412 stat
= STATUS_OVERFLOW
;
1417 // Stash away the index of .got2 or .opd in a relocatable object, if
1418 // such a section exists.
1420 template<int size
, bool big_endian
>
1422 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1423 Read_symbols_data
* sd
)
1425 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1426 const unsigned char* namesu
= sd
->section_names
->data();
1427 const char* names
= reinterpret_cast<const char*>(namesu
);
1428 section_size_type names_size
= sd
->section_names_size
;
1429 const unsigned char* s
;
1431 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1432 names
, names_size
, NULL
);
1435 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1436 this->special_
= ndx
;
1438 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1441 // Examine .rela.opd to build info about function entry points.
1443 template<int size
, bool big_endian
>
1445 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1447 const unsigned char* prelocs
,
1448 const unsigned char* plocal_syms
)
1452 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1454 const int reloc_size
1455 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1456 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1457 Address expected_off
= 0;
1458 bool regular
= true;
1459 unsigned int opd_ent_size
= 0;
1461 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1463 Reltype
reloc(prelocs
);
1464 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1465 = reloc
.get_r_info();
1466 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1467 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1469 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1470 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1473 if (r_sym
< this->local_symbol_count())
1475 typename
elfcpp::Sym
<size
, big_endian
>
1476 lsym(plocal_syms
+ r_sym
* sym_size
);
1477 shndx
= lsym
.get_st_shndx();
1478 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1479 value
= lsym
.get_st_value();
1482 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1484 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1485 value
+ reloc
.get_r_addend());
1488 expected_off
= reloc
.get_r_offset();
1489 opd_ent_size
= expected_off
;
1491 else if (expected_off
!= reloc
.get_r_offset())
1493 expected_off
+= opd_ent_size
;
1495 else if (r_type
== elfcpp::R_PPC64_TOC
)
1497 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1502 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1503 this->name().c_str(), r_type
);
1507 if (reloc_count
<= 2)
1508 opd_ent_size
= this->section_size(this->opd_shndx());
1509 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1513 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1514 this->name().c_str());
1520 template<int size
, bool big_endian
>
1522 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1524 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1527 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1528 p
!= rd
->relocs
.end();
1531 if (p
->data_shndx
== this->opd_shndx())
1533 uint64_t opd_size
= this->section_size(this->opd_shndx());
1534 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1537 this->init_opd(opd_size
);
1538 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1539 rd
->local_symbols
->data());
1547 // Set up some symbols.
1549 template<int size
, bool big_endian
>
1551 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1552 Symbol_table
* symtab
,
1557 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1558 // undefined when scanning relocs (and thus requires
1559 // non-relative dynamic relocs). The proper value will be
1561 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1562 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1564 Target_powerpc
<size
, big_endian
>* target
=
1565 static_cast<Target_powerpc
<size
, big_endian
>*>(
1566 parameters
->sized_target
<size
, big_endian
>());
1567 Output_data_got_powerpc
<size
, big_endian
>* got
1568 = target
->got_section(symtab
, layout
);
1569 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1570 Symbol_table::PREDEFINED
,
1574 elfcpp::STV_HIDDEN
, 0,
1578 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1579 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1580 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1582 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1584 = layout
->add_output_section_data(".sdata", 0,
1586 | elfcpp::SHF_WRITE
,
1587 sdata
, ORDER_SMALL_DATA
, false);
1588 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1589 Symbol_table::PREDEFINED
,
1590 os
, 32768, 0, elfcpp::STT_OBJECT
,
1591 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1597 // Set up PowerPC target specific relobj.
1599 template<int size
, bool big_endian
>
1601 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1602 const std::string
& name
,
1603 Input_file
* input_file
,
1604 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1606 int et
= ehdr
.get_e_type();
1607 // ET_EXEC files are valid input for --just-symbols/-R,
1608 // and we treat them as relocatable objects.
1609 if (et
== elfcpp::ET_REL
1610 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1612 Powerpc_relobj
<size
, big_endian
>* obj
=
1613 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1617 else if (et
== elfcpp::ET_DYN
)
1619 Sized_dynobj
<size
, big_endian
>* obj
=
1620 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1626 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1631 template<int size
, bool big_endian
>
1632 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1635 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1636 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1638 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1639 : Output_data_got
<size
, big_endian
>(),
1640 symtab_(symtab
), layout_(layout
),
1641 header_ent_cnt_(size
== 32 ? 3 : 1),
1642 header_index_(size
== 32 ? 0x2000 : 0)
1647 // Create a new GOT entry and return its offset.
1649 add_got_entry(Got_entry got_entry
)
1651 this->reserve_ent();
1652 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1655 // Create a pair of new GOT entries and return the offset of the first.
1657 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1659 this->reserve_ent(2);
1660 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1665 add_constant_pair(Valtype c1
, Valtype c2
)
1667 this->reserve_ent(2);
1668 unsigned int got_offset
= this->add_constant(c1
);
1669 this->add_constant(c2
);
1673 // Offset of _GLOBAL_OFFSET_TABLE_.
1677 return this->got_offset(this->header_index_
);
1680 // Offset of base used to access the GOT/TOC.
1681 // The got/toc pointer reg will be set to this value.
1683 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1686 return this->g_o_t();
1688 return (this->output_section()->address()
1689 + object
->toc_base_offset()
1693 // Ensure our GOT has a header.
1695 set_final_data_size()
1697 if (this->header_ent_cnt_
!= 0)
1698 this->make_header();
1699 Output_data_got
<size
, big_endian
>::set_final_data_size();
1702 // First word of GOT header needs some values that are not
1703 // handled by Output_data_got so poke them in here.
1704 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1706 do_write(Output_file
* of
)
1709 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
1710 val
= this->layout_
->dynamic_section()->address();
1712 val
= this->output_section()->address() + 0x8000;
1713 this->replace_constant(this->header_index_
, val
);
1714 Output_data_got
<size
, big_endian
>::do_write(of
);
1719 reserve_ent(unsigned int cnt
= 1)
1721 if (this->header_ent_cnt_
== 0)
1723 if (this->num_entries() + cnt
> this->header_index_
)
1724 this->make_header();
1730 this->header_ent_cnt_
= 0;
1731 this->header_index_
= this->num_entries();
1734 Output_data_got
<size
, big_endian
>::add_constant(0);
1735 Output_data_got
<size
, big_endian
>::add_constant(0);
1736 Output_data_got
<size
, big_endian
>::add_constant(0);
1738 // Define _GLOBAL_OFFSET_TABLE_ at the header
1739 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1742 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
1743 sym
->set_value(this->g_o_t());
1746 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1747 Symbol_table::PREDEFINED
,
1748 this, this->g_o_t(), 0,
1751 elfcpp::STV_HIDDEN
, 0,
1755 Output_data_got
<size
, big_endian
>::add_constant(0);
1758 // Stashed pointers.
1759 Symbol_table
* symtab_
;
1763 unsigned int header_ent_cnt_
;
1764 // GOT header index.
1765 unsigned int header_index_
;
1768 // Get the GOT section, creating it if necessary.
1770 template<int size
, bool big_endian
>
1771 Output_data_got_powerpc
<size
, big_endian
>*
1772 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1775 if (this->got_
== NULL
)
1777 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1780 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1782 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1783 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1784 this->got_
, ORDER_DATA
, false);
1790 // Get the dynamic reloc section, creating it if necessary.
1792 template<int size
, bool big_endian
>
1793 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1794 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1796 if (this->rela_dyn_
== NULL
)
1798 gold_assert(layout
!= NULL
);
1799 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1800 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1801 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1802 ORDER_DYNAMIC_RELOCS
, false);
1804 return this->rela_dyn_
;
1810 // Determine the stub group size. The group size is the absolute
1811 // value of the parameter --stub-group-size. If --stub-group-size
1812 // is passed a negative value, we restrict stubs to be always before
1813 // the stubbed branches.
1814 Stub_control(int32_t size
)
1815 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
1816 stub14_group_size_(abs(size
)),
1817 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
1818 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
1820 if (stub_group_size_
== 1)
1823 if (stubs_always_before_branch_
)
1825 stub_group_size_
= 0x1e00000;
1826 stub14_group_size_
= 0x7800;
1830 stub_group_size_
= 0x1c00000;
1831 stub14_group_size_
= 0x7000;
1833 suppress_size_errors_
= true;
1837 // Return true iff input section can be handled by current stub
1840 can_add_to_stub_group(Output_section
* o
,
1841 const Output_section::Input_section
* i
,
1844 const Output_section::Input_section
*
1850 { return output_section_
; }
1856 FINDING_STUB_SECTION
,
1861 uint32_t stub_group_size_
;
1862 uint32_t stub14_group_size_
;
1863 bool stubs_always_before_branch_
;
1864 bool suppress_size_errors_
;
1865 uint64_t group_end_addr_
;
1866 const Output_section::Input_section
* owner_
;
1867 Output_section
* output_section_
;
1870 // Return true iff input section can be handled by current stub/
1874 Stub_control::can_add_to_stub_group(Output_section
* o
,
1875 const Output_section::Input_section
* i
,
1879 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
1880 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
1882 uint64_t start_addr
= o
->address();
1885 // .init and .fini sections are pasted together to form a single
1886 // function. We can't be adding stubs in the middle of the function.
1887 this_size
= o
->data_size();
1890 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
1891 this_size
= i
->data_size();
1893 uint64_t end_addr
= start_addr
+ this_size
;
1894 bool toobig
= this_size
> group_size
;
1896 if (toobig
&& !this->suppress_size_errors_
)
1897 gold_warning(_("%s:%s exceeds group size"),
1898 i
->relobj()->name().c_str(),
1899 i
->relobj()->section_name(i
->shndx()).c_str());
1901 if (this->state_
!= HAS_STUB_SECTION
1902 && (!whole_sec
|| this->output_section_
!= o
))
1905 this->output_section_
= o
;
1908 if (this->state_
== NO_GROUP
)
1910 this->state_
= FINDING_STUB_SECTION
;
1911 this->group_end_addr_
= end_addr
;
1913 else if (this->group_end_addr_
- start_addr
< group_size
)
1915 // Adding this section would make the group larger than GROUP_SIZE.
1916 else if (this->state_
== FINDING_STUB_SECTION
1917 && !this->stubs_always_before_branch_
1920 // But wait, there's more! Input sections up to GROUP_SIZE
1921 // bytes before the stub table can be handled by it too.
1922 this->state_
= HAS_STUB_SECTION
;
1923 this->group_end_addr_
= end_addr
;
1927 this->state_
= NO_GROUP
;
1933 // Look over all the input sections, deciding where to place stubs.
1935 template<int size
, bool big_endian
>
1937 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
1940 Stub_control
stub_control(parameters
->options().stub_group_size());
1942 // Group input sections and insert stub table
1943 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
1944 Layout::Section_list section_list
;
1945 layout
->get_executable_sections(§ion_list
);
1946 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
1947 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
1948 o
!= section_list
.rend();
1951 typedef Output_section::Input_section_list Input_section_list
;
1952 for (Input_section_list::const_reverse_iterator i
1953 = (*o
)->input_sections().rbegin();
1954 i
!= (*o
)->input_sections().rend();
1957 if (i
->is_input_section())
1959 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1960 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
1961 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
1962 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
1964 stub_table
->init(stub_control
.owner(),
1965 stub_control
.output_section());
1968 if (stub_table
== NULL
)
1969 stub_table
= this->new_stub_table();
1970 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
1974 if (stub_table
!= NULL
)
1975 stub_table
->init(stub_control
.owner(), stub_control
.output_section());
1978 // If this branch needs a plt call stub, or a long branch stub, make one.
1980 template<int size
, bool big_endian
>
1982 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
1983 Stub_table
<size
, big_endian
>* stub_table
,
1984 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
1985 Symbol_table
* symtab
) const
1987 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
1988 if (sym
!= NULL
&& sym
->is_forwarder())
1989 sym
= symtab
->resolve_forwards(sym
);
1990 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
1992 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
1993 : this->object_
->local_has_plt_offset(this->r_sym_
))
1995 if (stub_table
== NULL
)
1996 stub_table
= this->object_
->stub_table(this->shndx_
);
1997 if (stub_table
== NULL
)
1999 // This is a ref from a data section to an ifunc symbol.
2000 stub_table
= ifunc_stub_table
;
2002 gold_assert(stub_table
!= NULL
);
2004 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2005 this->r_type_
, this->addend_
);
2007 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2008 this->r_type_
, this->addend_
);
2012 unsigned int max_branch_offset
;
2013 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2014 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2015 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2016 max_branch_offset
= 1 << 15;
2017 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2018 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2019 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2020 max_branch_offset
= 1 << 25;
2023 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2024 gold_assert(from
!= invalid_address
);
2025 from
+= (this->object_
->output_section(this->shndx_
)->address()
2030 switch (gsym
->source())
2032 case Symbol::FROM_OBJECT
:
2034 Object
* symobj
= gsym
->object();
2035 if (symobj
->is_dynamic()
2036 || symobj
->pluginobj() != NULL
)
2039 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2040 if (shndx
== elfcpp::SHN_UNDEF
)
2045 case Symbol::IS_UNDEFINED
:
2051 Symbol_table::Compute_final_value_status status
;
2052 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2053 if (status
!= Symbol_table::CFVS_OK
)
2058 const Symbol_value
<size
>* psymval
2059 = this->object_
->local_symbol(this->r_sym_
);
2060 Symbol_value
<size
> symval
;
2061 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2062 typename
ObjType::Compute_final_local_value_status status
2063 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2065 if (status
!= ObjType::CFLV_OK
2066 || !symval
.has_output_value())
2068 to
= symval
.value(this->object_
, 0);
2070 if (stub_table
== NULL
)
2071 stub_table
= this->object_
->stub_table(this->shndx_
);
2072 gold_assert(stub_table
!= NULL
);
2073 if (size
== 64 && is_branch_reloc(this->r_type_
))
2075 unsigned int dest_shndx
;
2076 to
= stub_table
->targ()->symval_for_branch(to
, gsym
, this->object_
,
2079 Address delta
= to
- from
;
2080 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2082 stub_table
->add_long_branch_entry(this->object_
, to
);
2087 // Relaxation hook. This is where we do stub generation.
2089 template<int size
, bool big_endian
>
2091 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2092 const Input_objects
*,
2093 Symbol_table
* symtab
,
2097 unsigned int prev_brlt_size
= 0;
2100 bool thread_safe
= parameters
->options().plt_thread_safe();
2101 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2103 const char* const thread_starter
[] =
2107 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2109 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2110 "mq_notify", "create_timer",
2114 "GOMP_parallel_start",
2115 "GOMP_parallel_loop_static_start",
2116 "GOMP_parallel_loop_dynamic_start",
2117 "GOMP_parallel_loop_guided_start",
2118 "GOMP_parallel_loop_runtime_start",
2119 "GOMP_parallel_sections_start",
2122 for (unsigned int i
= 0;
2123 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2126 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2127 thread_safe
= sym
!= NULL
&& sym
->in_reg() && sym
->in_real_elf();
2132 this->plt_thread_safe_
= thread_safe
;
2133 this->group_sections(layout
, task
);
2136 // We need address of stub tables valid for make_stub.
2137 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2138 p
!= this->stub_tables_
.end();
2141 const Powerpc_relobj
<size
, big_endian
>* object
2142 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2143 Address off
= object
->get_output_section_offset((*p
)->shndx());
2144 gold_assert(off
!= invalid_address
);
2145 Output_section
* os
= (*p
)->output_section();
2146 (*p
)->set_address_and_size(os
, off
);
2151 // Clear plt call stubs, long branch stubs and branch lookup table.
2152 prev_brlt_size
= this->branch_lookup_table_
.size();
2153 this->branch_lookup_table_
.clear();
2154 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2155 p
!= this->stub_tables_
.end();
2158 (*p
)->clear_stubs();
2162 // Build all the stubs.
2163 Stub_table
<size
, big_endian
>* ifunc_stub_table
2164 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2165 Stub_table
<size
, big_endian
>* one_stub_table
2166 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2167 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2168 b
!= this->branch_info_
.end();
2171 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2174 // Did anything change size?
2175 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2176 bool again
= num_huge_branches
!= prev_brlt_size
;
2177 if (size
== 64 && num_huge_branches
!= 0)
2178 this->make_brlt_section(layout
);
2179 if (size
== 64 && again
)
2180 this->brlt_section_
->set_current_size(num_huge_branches
);
2182 typedef Unordered_set
<Output_section
*> Output_sections
;
2183 Output_sections os_need_update
;
2184 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2185 p
!= this->stub_tables_
.end();
2188 if ((*p
)->size_update())
2191 os_need_update
.insert((*p
)->output_section());
2195 // Set output section offsets for all input sections in an output
2196 // section that just changed size. Anything past the stubs will
2198 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2199 p
!= os_need_update
.end();
2202 Output_section
* os
= *p
;
2204 typedef Output_section::Input_section_list Input_section_list
;
2205 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2206 i
!= os
->input_sections().end();
2209 off
= align_address(off
, i
->addralign());
2210 if (i
->is_input_section() || i
->is_relaxed_input_section())
2211 i
->relobj()->set_section_offset(i
->shndx(), off
);
2212 if (i
->is_relaxed_input_section())
2214 Stub_table
<size
, big_endian
>* stub_table
2215 = static_cast<Stub_table
<size
, big_endian
>*>(
2216 i
->relaxed_input_section());
2217 off
+= stub_table
->set_address_and_size(os
, off
);
2220 off
+= i
->data_size();
2222 // If .brlt is part of this output section, then we have just
2223 // done the offset adjustment.
2224 os
->clear_section_offsets_need_adjustment();
2229 && num_huge_branches
!= 0
2230 && parameters
->options().output_is_position_independent())
2232 // Fill in the BRLT relocs.
2233 this->brlt_section_
->reset_data_size();
2234 for (typename
Branch_lookup_table::const_iterator p
2235 = this->branch_lookup_table_
.begin();
2236 p
!= this->branch_lookup_table_
.end();
2239 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2241 this->brlt_section_
->finalize_data_size();
2246 // A class to handle the PLT data.
2248 template<int size
, bool big_endian
>
2249 class Output_data_plt_powerpc
: public Output_section_data_build
2252 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2253 size
, big_endian
> Reloc_section
;
2255 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2256 Reloc_section
* plt_rel
,
2257 unsigned int reserved_size
,
2259 : Output_section_data_build(size
== 32 ? 4 : 8),
2262 initial_plt_entry_size_(reserved_size
),
2266 // Add an entry to the PLT.
2271 add_ifunc_entry(Symbol
*);
2274 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2276 // Return the .rela.plt section data.
2283 // Return the number of PLT entries.
2287 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2291 // Return the offset of the first non-reserved PLT entry.
2293 first_plt_entry_offset()
2294 { return this->initial_plt_entry_size_
; }
2296 // Return the size of a PLT entry.
2298 get_plt_entry_size()
2299 { return plt_entry_size
; }
2303 do_adjust_output_section(Output_section
* os
)
2308 // Write to a map file.
2310 do_print_to_mapfile(Mapfile
* mapfile
) const
2311 { mapfile
->print_output_data(this, this->name_
); }
2314 // The size of an entry in the PLT.
2315 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2317 // Write out the PLT data.
2319 do_write(Output_file
*);
2321 // The reloc section.
2322 Reloc_section
* rel_
;
2323 // Allows access to .glink for do_write.
2324 Target_powerpc
<size
, big_endian
>* targ_
;
2325 // The size of the first reserved entry.
2326 int initial_plt_entry_size_
;
2327 // What to report in map file.
2331 // Add an entry to the PLT.
2333 template<int size
, bool big_endian
>
2335 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2337 if (!gsym
->has_plt_offset())
2339 section_size_type off
= this->current_data_size();
2341 off
+= this->first_plt_entry_offset();
2342 gsym
->set_plt_offset(off
);
2343 gsym
->set_needs_dynsym_entry();
2344 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2345 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2346 off
+= plt_entry_size
;
2347 this->set_current_data_size(off
);
2351 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2353 template<int size
, bool big_endian
>
2355 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2357 if (!gsym
->has_plt_offset())
2359 section_size_type off
= this->current_data_size();
2360 gsym
->set_plt_offset(off
);
2361 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2363 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2364 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2365 off
+= plt_entry_size
;
2366 this->set_current_data_size(off
);
2370 // Add an entry for a local ifunc symbol to the IPLT.
2372 template<int size
, bool big_endian
>
2374 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2375 Sized_relobj_file
<size
, big_endian
>* relobj
,
2376 unsigned int local_sym_index
)
2378 if (!relobj
->local_has_plt_offset(local_sym_index
))
2380 section_size_type off
= this->current_data_size();
2381 relobj
->set_local_plt_offset(local_sym_index
, off
);
2382 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2384 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2385 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2387 off
+= plt_entry_size
;
2388 this->set_current_data_size(off
);
2392 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2393 static const uint32_t add_2_2_11
= 0x7c425a14;
2394 static const uint32_t add_3_3_2
= 0x7c631214;
2395 static const uint32_t add_3_3_13
= 0x7c636a14;
2396 static const uint32_t add_11_0_11
= 0x7d605a14;
2397 static const uint32_t add_12_2_11
= 0x7d825a14;
2398 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2399 static const uint32_t addi_11_11
= 0x396b0000;
2400 static const uint32_t addi_12_12
= 0x398c0000;
2401 static const uint32_t addi_2_2
= 0x38420000;
2402 static const uint32_t addi_3_2
= 0x38620000;
2403 static const uint32_t addi_3_3
= 0x38630000;
2404 static const uint32_t addis_0_2
= 0x3c020000;
2405 static const uint32_t addis_0_13
= 0x3c0d0000;
2406 static const uint32_t addis_11_11
= 0x3d6b0000;
2407 static const uint32_t addis_11_30
= 0x3d7e0000;
2408 static const uint32_t addis_12_12
= 0x3d8c0000;
2409 static const uint32_t addis_12_2
= 0x3d820000;
2410 static const uint32_t addis_3_2
= 0x3c620000;
2411 static const uint32_t addis_3_13
= 0x3c6d0000;
2412 static const uint32_t b
= 0x48000000;
2413 static const uint32_t bcl_20_31
= 0x429f0005;
2414 static const uint32_t bctr
= 0x4e800420;
2415 static const uint32_t blr
= 0x4e800020;
2416 static const uint32_t blrl
= 0x4e800021;
2417 static const uint32_t bnectr_p4
= 0x4ce20420;
2418 static const uint32_t cmpldi_2_0
= 0x28220000;
2419 static const uint32_t cror_15_15_15
= 0x4def7b82;
2420 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2421 static const uint32_t ld_0_1
= 0xe8010000;
2422 static const uint32_t ld_0_12
= 0xe80c0000;
2423 static const uint32_t ld_11_12
= 0xe96c0000;
2424 static const uint32_t ld_11_2
= 0xe9620000;
2425 static const uint32_t ld_2_1
= 0xe8410000;
2426 static const uint32_t ld_2_11
= 0xe84b0000;
2427 static const uint32_t ld_2_12
= 0xe84c0000;
2428 static const uint32_t ld_2_2
= 0xe8420000;
2429 static const uint32_t lfd_0_1
= 0xc8010000;
2430 static const uint32_t li_0_0
= 0x38000000;
2431 static const uint32_t li_12_0
= 0x39800000;
2432 static const uint32_t lis_0_0
= 0x3c000000;
2433 static const uint32_t lis_11
= 0x3d600000;
2434 static const uint32_t lis_12
= 0x3d800000;
2435 static const uint32_t lwz_0_12
= 0x800c0000;
2436 static const uint32_t lwz_11_11
= 0x816b0000;
2437 static const uint32_t lwz_11_30
= 0x817e0000;
2438 static const uint32_t lwz_12_12
= 0x818c0000;
2439 static const uint32_t lwzu_0_12
= 0x840c0000;
2440 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2441 static const uint32_t mflr_0
= 0x7c0802a6;
2442 static const uint32_t mflr_11
= 0x7d6802a6;
2443 static const uint32_t mflr_12
= 0x7d8802a6;
2444 static const uint32_t mtctr_0
= 0x7c0903a6;
2445 static const uint32_t mtctr_11
= 0x7d6903a6;
2446 static const uint32_t mtctr_12
= 0x7d8903a6;
2447 static const uint32_t mtlr_0
= 0x7c0803a6;
2448 static const uint32_t mtlr_12
= 0x7d8803a6;
2449 static const uint32_t nop
= 0x60000000;
2450 static const uint32_t ori_0_0_0
= 0x60000000;
2451 static const uint32_t std_0_1
= 0xf8010000;
2452 static const uint32_t std_0_12
= 0xf80c0000;
2453 static const uint32_t std_2_1
= 0xf8410000;
2454 static const uint32_t stfd_0_1
= 0xd8010000;
2455 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2456 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2457 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2459 // Write out the PLT.
2461 template<int size
, bool big_endian
>
2463 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2467 const section_size_type offset
= this->offset();
2468 const section_size_type oview_size
2469 = convert_to_section_size_type(this->data_size());
2470 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2471 unsigned char* pov
= oview
;
2472 unsigned char* endpov
= oview
+ oview_size
;
2474 // The address of the .glink branch table
2475 const Output_data_glink
<size
, big_endian
>* glink
2476 = this->targ_
->glink_section();
2477 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2479 while (pov
< endpov
)
2481 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2486 of
->write_output_view(offset
, oview_size
, oview
);
2490 // Create the PLT section.
2492 template<int size
, bool big_endian
>
2494 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2497 if (this->plt_
== NULL
)
2499 if (this->got_
== NULL
)
2500 this->got_section(symtab
, layout
);
2502 if (this->glink_
== NULL
)
2503 make_glink_section(layout
);
2505 // Ensure that .rela.dyn always appears before .rela.plt This is
2506 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2507 // needs to include .rela.plt in it's range.
2508 this->rela_dyn_section(layout
);
2510 Reloc_section
* plt_rel
= new Reloc_section(false);
2511 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2512 elfcpp::SHF_ALLOC
, plt_rel
,
2513 ORDER_DYNAMIC_PLT_RELOCS
, false);
2515 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2516 size
== 32 ? 0 : 24,
2518 layout
->add_output_section_data(".plt",
2520 ? elfcpp::SHT_PROGBITS
2521 : elfcpp::SHT_NOBITS
),
2522 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2531 // Create the IPLT section.
2533 template<int size
, bool big_endian
>
2535 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2538 if (this->iplt_
== NULL
)
2540 this->make_plt_section(symtab
, layout
);
2542 Reloc_section
* iplt_rel
= new Reloc_section(false);
2543 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2545 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2547 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2551 // A section for huge long branch addresses, similar to plt section.
2553 template<int size
, bool big_endian
>
2554 class Output_data_brlt_powerpc
: public Output_section_data_build
2557 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2558 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2559 size
, big_endian
> Reloc_section
;
2561 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2562 Reloc_section
* brlt_rel
)
2563 : Output_section_data_build(size
== 32 ? 4 : 8),
2568 // Add a reloc for an entry in the BRLT.
2570 add_reloc(Address to
, unsigned int off
)
2571 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
2573 // Update section and reloc section size.
2575 set_current_size(unsigned int num_branches
)
2577 this->reset_address_and_file_offset();
2578 this->set_current_data_size(num_branches
* 16);
2579 this->finalize_data_size();
2580 Output_section
* os
= this->output_section();
2581 os
->set_section_offsets_need_adjustment();
2582 if (this->rel_
!= NULL
)
2584 unsigned int reloc_size
2585 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
2586 this->rel_
->reset_address_and_file_offset();
2587 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
2588 this->rel_
->finalize_data_size();
2589 Output_section
* os
= this->rel_
->output_section();
2590 os
->set_section_offsets_need_adjustment();
2596 do_adjust_output_section(Output_section
* os
)
2601 // Write to a map file.
2603 do_print_to_mapfile(Mapfile
* mapfile
) const
2604 { mapfile
->print_output_data(this, "** BRLT"); }
2607 // Write out the BRLT data.
2609 do_write(Output_file
*);
2611 // The reloc section.
2612 Reloc_section
* rel_
;
2613 Target_powerpc
<size
, big_endian
>* targ_
;
2616 // Make the branch lookup table section.
2618 template<int size
, bool big_endian
>
2620 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
2622 if (size
== 64 && this->brlt_section_
== NULL
)
2624 Reloc_section
* brlt_rel
= NULL
;
2625 bool is_pic
= parameters
->options().output_is_position_independent();
2628 // When PIC we can't fill in .brlt (like .plt it can be a
2629 // bss style section) but must initialise at runtime via
2630 // dynamic relocats.
2631 this->rela_dyn_section(layout
);
2632 brlt_rel
= new Reloc_section(false);
2633 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
2636 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
2637 if (this->plt_
&& is_pic
)
2638 this->plt_
->output_section()
2639 ->add_output_section_data(this->brlt_section_
);
2641 layout
->add_output_section_data(".brlt",
2642 (is_pic
? elfcpp::SHT_NOBITS
2643 : elfcpp::SHT_PROGBITS
),
2644 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2645 this->brlt_section_
,
2646 (is_pic
? ORDER_SMALL_BSS
2647 : ORDER_SMALL_DATA
),
2652 // Write out .brlt when non-PIC.
2654 template<int size
, bool big_endian
>
2656 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2658 if (size
== 64 && !parameters
->options().output_is_position_independent())
2660 const section_size_type offset
= this->offset();
2661 const section_size_type oview_size
2662 = convert_to_section_size_type(this->data_size());
2663 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2665 this->targ_
->write_branch_lookup_table(oview
);
2666 of
->write_output_view(offset
, oview_size
, oview
);
2670 static inline uint32_t
2676 static inline uint32_t
2682 static inline uint32_t
2685 return hi(a
+ 0x8000);
2688 template<bool big_endian
>
2690 write_insn(unsigned char* p
, uint32_t v
)
2692 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2695 // Stub_table holds information about plt and long branch stubs.
2696 // Stubs are built in an area following some input section determined
2697 // by group_sections(). This input section is converted to a relaxed
2698 // input section allowing it to be resized to accommodate the stubs
2700 template<int size
, bool big_endian
>
2701 class Stub_table
: public Output_relaxed_input_section
2704 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2705 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2707 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
2708 : Output_relaxed_input_section(NULL
, 0, 0),
2709 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
2710 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2711 branch_size_(0), last_branch_size_(0)
2714 // Delayed Output_relaxed_input_section init.
2716 init(const Output_section::Input_section
*, Output_section
*);
2718 // Add a plt call stub.
2720 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2726 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2731 // Find a given plt call stub.
2733 find_plt_call_entry(const Symbol
*) const;
2736 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2737 unsigned int) const;
2740 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2746 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
2751 // Add a long branch stub.
2753 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2756 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
2761 this->plt_call_stubs_
.clear();
2762 this->plt_size_
= 0;
2763 this->long_branch_stubs_
.clear();
2764 this->branch_size_
= 0;
2768 set_address_and_size(const Output_section
* os
, Address off
)
2770 Address start_off
= off
;
2771 off
+= this->orig_data_size_
;
2772 Address my_size
= this->plt_size_
+ this->branch_size_
;
2774 off
= align_address(off
, this->stub_align());
2775 // Include original section size and alignment padding in size
2776 my_size
+= off
- start_off
;
2777 this->reset_address_and_file_offset();
2778 this->set_current_data_size(my_size
);
2779 this->set_address_and_file_offset(os
->address() + start_off
,
2780 os
->offset() + start_off
);
2787 return align_address(this->address() + this->orig_data_size_
,
2788 this->stub_align());
2794 return align_address(this->offset() + this->orig_data_size_
,
2795 this->stub_align());
2800 { return this->plt_size_
; }
2805 Output_section
* os
= this->output_section();
2806 if (os
->addralign() < this->stub_align())
2808 os
->set_addralign(this->stub_align());
2809 // FIXME: get rid of the insane checkpointing.
2810 // We can't increase alignment of the input section to which
2811 // stubs are attached; The input section may be .init which
2812 // is pasted together with other .init sections to form a
2813 // function. Aligning might insert zero padding resulting in
2814 // sigill. However we do need to increase alignment of the
2815 // output section so that the align_address() on offset in
2816 // set_address_and_size() adds the same padding as the
2817 // align_address() on address in stub_address().
2818 // What's more, we need this alignment for the layout done in
2819 // relaxation_loop_body() so that the output section starts at
2820 // a suitably aligned address.
2821 os
->checkpoint_set_addralign(this->stub_align());
2823 if (this->last_plt_size_
!= this->plt_size_
2824 || this->last_branch_size_
!= this->branch_size_
)
2826 this->last_plt_size_
= this->plt_size_
;
2827 this->last_branch_size_
= this->branch_size_
;
2833 Target_powerpc
<size
, big_endian
>*
2839 class Plt_stub_ent_hash
;
2840 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
2841 Plt_stub_ent_hash
> Plt_stub_entries
;
2843 // Alignment of stub section.
2849 unsigned int min_align
= 32;
2850 unsigned int user_align
= 1 << parameters
->options().plt_align();
2851 return std::max(user_align
, min_align
);
2854 // Size of a given plt call stub.
2856 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
2861 Address pltaddr
= p
->second
;
2862 if (p
->first
.sym_
== NULL
2863 || (p
->first
.sym_
->type() == elfcpp::STT_GNU_IFUNC
2864 && p
->first
.sym_
->can_use_relative_reloc(false)))
2865 pltaddr
+= this->targ_
->iplt_section()->address();
2867 pltaddr
+= this->targ_
->plt_section()->address();
2868 Address tocbase
= this->targ_
->got_section()->output_section()->address();
2869 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2870 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
2871 tocbase
+= ppcobj
->toc_base_offset();
2872 Address off
= pltaddr
- tocbase
;
2873 bool static_chain
= parameters
->options().plt_static_chain();
2874 bool thread_safe
= this->targ_
->plt_thread_safe();
2875 unsigned int bytes
= (4 * 5
2878 + 4 * (ha(off
) != 0)
2879 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
2880 unsigned int align
= 1 << parameters
->options().plt_align();
2882 bytes
= (bytes
+ align
- 1) & -align
;
2886 // Return long branch stub size.
2888 branch_stub_size(Address to
)
2891 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
2892 if (to
- loc
+ (1 << 25) < 2 << 25)
2894 if (size
== 64 || !parameters
->options().output_is_position_independent())
2901 do_write(Output_file
*);
2903 // Plt call stub keys.
2907 Plt_stub_ent(const Symbol
* sym
)
2908 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2911 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2912 unsigned int locsym_index
)
2913 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2916 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2918 unsigned int r_type
,
2920 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2923 this->addend_
= addend
;
2924 else if (parameters
->options().output_is_position_independent()
2925 && r_type
== elfcpp::R_PPC_PLTREL24
)
2927 this->addend_
= addend
;
2928 if (this->addend_
>= 32768)
2929 this->object_
= object
;
2933 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2934 unsigned int locsym_index
,
2935 unsigned int r_type
,
2937 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2940 this->addend_
= addend
;
2941 else if (parameters
->options().output_is_position_independent()
2942 && r_type
== elfcpp::R_PPC_PLTREL24
)
2943 this->addend_
= addend
;
2946 bool operator==(const Plt_stub_ent
& that
) const
2948 return (this->sym_
== that
.sym_
2949 && this->object_
== that
.object_
2950 && this->addend_
== that
.addend_
2951 && this->locsym_
== that
.locsym_
);
2955 const Sized_relobj_file
<size
, big_endian
>* object_
;
2956 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
2957 unsigned int locsym_
;
2960 class Plt_stub_ent_hash
2963 size_t operator()(const Plt_stub_ent
& ent
) const
2965 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
2966 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
2972 // Long branch stub keys.
2973 class Branch_stub_ent
2976 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
2977 : dest_(to
), toc_base_off_(0)
2980 toc_base_off_
= obj
->toc_base_offset();
2983 bool operator==(const Branch_stub_ent
& that
) const
2985 return (this->dest_
== that
.dest_
2987 || this->toc_base_off_
== that
.toc_base_off_
));
2991 unsigned int toc_base_off_
;
2994 class Branch_stub_ent_hash
2997 size_t operator()(const Branch_stub_ent
& ent
) const
2998 { return ent
.dest_
^ ent
.toc_base_off_
; }
3001 // In a sane world this would be a global.
3002 Target_powerpc
<size
, big_endian
>* targ_
;
3003 // Map sym/object/addend to stub offset.
3004 Plt_stub_entries plt_call_stubs_
;
3005 // Map destination address to stub offset.
3006 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3007 Branch_stub_ent_hash
> Branch_stub_entries
;
3008 Branch_stub_entries long_branch_stubs_
;
3009 // size of input section
3010 section_size_type orig_data_size_
;
3012 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3015 // Make a new stub table, and record.
3017 template<int size
, bool big_endian
>
3018 Stub_table
<size
, big_endian
>*
3019 Target_powerpc
<size
, big_endian
>::new_stub_table()
3021 Stub_table
<size
, big_endian
>* stub_table
3022 = new Stub_table
<size
, big_endian
>(this);
3023 this->stub_tables_
.push_back(stub_table
);
3027 // Delayed stub table initialisation, because we create the stub table
3028 // before we know to which section it will be attached.
3030 template<int size
, bool big_endian
>
3032 Stub_table
<size
, big_endian
>::init(
3033 const Output_section::Input_section
* owner
,
3034 Output_section
* output_section
)
3036 this->set_relobj(owner
->relobj());
3037 this->set_shndx(owner
->shndx());
3038 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3039 this->set_output_section(output_section
);
3040 this->orig_data_size_
= owner
->current_data_size();
3042 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3043 new_relaxed
.push_back(this);
3044 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3047 // Add a plt call stub, if we do not already have one for this
3048 // sym/object/addend combo.
3050 template<int size
, bool big_endian
>
3052 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3053 const Sized_relobj_file
<size
, big_endian
>* object
,
3055 unsigned int r_type
,
3058 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3059 Address off
= this->plt_size_
;
3060 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3061 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3063 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3066 template<int size
, bool big_endian
>
3068 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3069 const Sized_relobj_file
<size
, big_endian
>* object
,
3070 unsigned int locsym_index
,
3071 unsigned int r_type
,
3074 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3075 Address off
= this->plt_size_
;
3076 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3077 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3079 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3082 // Find a plt call stub.
3084 template<int size
, bool big_endian
>
3085 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3086 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3087 const Sized_relobj_file
<size
, big_endian
>* object
,
3089 unsigned int r_type
,
3090 Address addend
) const
3092 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3093 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3094 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3097 template<int size
, bool big_endian
>
3098 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3099 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3101 Plt_stub_ent
ent(gsym
);
3102 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3103 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3106 template<int size
, bool big_endian
>
3107 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3108 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3109 const Sized_relobj_file
<size
, big_endian
>* object
,
3110 unsigned int locsym_index
,
3111 unsigned int r_type
,
3112 Address addend
) const
3114 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3115 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3116 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3119 template<int size
, bool big_endian
>
3120 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3121 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3122 const Sized_relobj_file
<size
, big_endian
>* object
,
3123 unsigned int locsym_index
) const
3125 Plt_stub_ent
ent(object
, locsym_index
);
3126 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3127 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3130 // Add a long branch stub if we don't already have one to given
3133 template<int size
, bool big_endian
>
3135 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3136 const Powerpc_relobj
<size
, big_endian
>* object
,
3139 Branch_stub_ent
ent(object
, to
);
3140 Address off
= this->branch_size_
;
3141 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3143 unsigned int stub_size
= this->branch_stub_size(to
);
3144 this->branch_size_
= off
+ stub_size
;
3145 if (size
== 64 && stub_size
!= 4)
3146 this->targ_
->add_branch_lookup_table(to
);
3150 // Find long branch stub.
3152 template<int size
, bool big_endian
>
3153 typename
elfcpp::Elf_types
<size
>::Elf_Addr
3154 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3155 const Powerpc_relobj
<size
, big_endian
>* object
,
3158 Branch_stub_ent
ent(object
, to
);
3159 typename
Branch_stub_entries::const_iterator p
3160 = this->long_branch_stubs_
.find(ent
);
3161 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3164 // A class to handle .glink.
3166 template<int size
, bool big_endian
>
3167 class Output_data_glink
: public Output_section_data
3170 static const int pltresolve_size
= 16*4;
3172 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3173 : Output_section_data(16), targ_(targ
)
3177 // Write to a map file.
3179 do_print_to_mapfile(Mapfile
* mapfile
) const
3180 { mapfile
->print_output_data(this, _("** glink")); }
3184 set_final_data_size();
3188 do_write(Output_file
*);
3190 // Allows access to .got and .plt for do_write.
3191 Target_powerpc
<size
, big_endian
>* targ_
;
3194 template<int size
, bool big_endian
>
3196 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3198 unsigned int count
= this->targ_
->plt_entry_count();
3199 section_size_type total
= 0;
3205 // space for branch table
3206 total
+= 4 * (count
- 1);
3208 total
+= -total
& 15;
3209 total
+= this->pltresolve_size
;
3213 total
+= this->pltresolve_size
;
3215 // space for branch table
3218 total
+= 4 * (count
- 0x8000);
3222 this->set_data_size(total
);
3225 // Write out plt and long branch stub code.
3227 template<int size
, bool big_endian
>
3229 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3231 if (this->plt_call_stubs_
.empty()
3232 && this->long_branch_stubs_
.empty())
3235 const section_size_type start_off
= this->offset();
3236 const section_size_type off
= this->stub_offset();
3237 const section_size_type oview_size
=
3238 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3239 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3242 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3243 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3247 const Output_data_got_powerpc
<size
, big_endian
>* got
3248 = this->targ_
->got_section();
3249 Address got_os_addr
= got
->output_section()->address();
3251 if (!this->plt_call_stubs_
.empty())
3253 // The base address of the .plt section.
3254 Address plt_base
= this->targ_
->plt_section()->address();
3255 Address iplt_base
= invalid_address
;
3257 // Write out plt call stubs.
3258 typename
Plt_stub_entries::const_iterator cs
;
3259 for (cs
= this->plt_call_stubs_
.begin();
3260 cs
!= this->plt_call_stubs_
.end();
3265 const Symbol
* gsym
= cs
->first
.sym_
;
3268 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3269 && gsym
->can_use_relative_reloc(false));
3270 pltoff
= gsym
->plt_offset();
3275 const Sized_relobj_file
<size
, big_endian
>* relobj
3276 = cs
->first
.object_
;
3277 unsigned int local_sym_index
= cs
->first
.locsym_
;
3278 pltoff
= relobj
->local_plt_offset(local_sym_index
);
3280 Address plt_addr
= pltoff
;
3283 if (iplt_base
== invalid_address
)
3284 iplt_base
= this->targ_
->iplt_section()->address();
3285 plt_addr
+= iplt_base
;
3288 plt_addr
+= plt_base
;
3289 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3290 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3291 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3292 Address off
= plt_addr
- got_addr
;
3294 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3295 gold_error(_("%s: linkage table error against `%s'"),
3296 cs
->first
.object_
->name().c_str(),
3297 cs
->first
.sym_
->demangled_name().c_str());
3299 bool static_chain
= parameters
->options().plt_static_chain();
3300 bool thread_safe
= this->targ_
->plt_thread_safe();
3301 bool use_fake_dep
= false;
3302 Address cmp_branch_off
= 0;
3305 unsigned int pltindex
3306 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3307 / this->targ_
->plt_entry_size());
3309 = (this->targ_
->glink_section()->pltresolve_size
3311 if (pltindex
> 32768)
3312 glinkoff
+= (pltindex
- 32768) * 4;
3314 = this->targ_
->glink_section()->address() + glinkoff
;
3316 = (this->stub_address() + cs
->second
+ 24
3317 + 4 * (ha(off
) != 0)
3318 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3319 + 4 * static_chain
);
3320 cmp_branch_off
= to
- from
;
3321 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3324 p
= oview
+ cs
->second
;
3327 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3328 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3329 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3330 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3332 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3335 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3338 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3339 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3341 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3343 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3347 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3348 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3349 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3351 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3354 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3357 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3358 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3361 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3362 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3364 if (thread_safe
&& !use_fake_dep
)
3366 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3367 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3368 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3371 write_insn
<big_endian
>(p
, bctr
);
3375 // Write out long branch stubs.
3376 typename
Branch_stub_entries::const_iterator bs
;
3377 for (bs
= this->long_branch_stubs_
.begin();
3378 bs
!= this->long_branch_stubs_
.end();
3381 p
= oview
+ this->plt_size_
+ bs
->second
;
3382 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3383 Address delta
= bs
->first
.dest_
- loc
;
3384 if (delta
+ (1 << 25) < 2 << 25)
3385 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3389 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3390 gold_assert(brlt_addr
!= invalid_address
);
3391 brlt_addr
+= this->targ_
->brlt_section()->address();
3392 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3393 Address brltoff
= brlt_addr
- got_addr
;
3394 if (ha(brltoff
) == 0)
3396 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3400 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3401 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3403 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3404 write_insn
<big_endian
>(p
, bctr
);
3410 if (!this->plt_call_stubs_
.empty())
3412 // The base address of the .plt section.
3413 Address plt_base
= this->targ_
->plt_section()->address();
3414 Address iplt_base
= invalid_address
;
3415 // The address of _GLOBAL_OFFSET_TABLE_.
3416 Address g_o_t
= invalid_address
;
3418 // Write out plt call stubs.
3419 typename
Plt_stub_entries::const_iterator cs
;
3420 for (cs
= this->plt_call_stubs_
.begin();
3421 cs
!= this->plt_call_stubs_
.end();
3426 const Symbol
* gsym
= cs
->first
.sym_
;
3429 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3430 && gsym
->can_use_relative_reloc(false));
3431 plt_addr
= gsym
->plt_offset();
3436 const Sized_relobj_file
<size
, big_endian
>* relobj
3437 = cs
->first
.object_
;
3438 unsigned int local_sym_index
= cs
->first
.locsym_
;
3439 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
3443 if (iplt_base
== invalid_address
)
3444 iplt_base
= this->targ_
->iplt_section()->address();
3445 plt_addr
+= iplt_base
;
3448 plt_addr
+= plt_base
;
3450 p
= oview
+ cs
->second
;
3451 if (parameters
->options().output_is_position_independent())
3454 const Powerpc_relobj
<size
, big_endian
>* ppcobj
3455 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
3456 (cs
->first
.object_
));
3457 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
3459 unsigned int got2
= ppcobj
->got2_shndx();
3460 got_addr
= ppcobj
->get_output_section_offset(got2
);
3461 gold_assert(got_addr
!= invalid_address
);
3462 got_addr
+= (ppcobj
->output_section(got2
)->address()
3463 + cs
->first
.addend_
);
3467 if (g_o_t
== invalid_address
)
3469 const Output_data_got_powerpc
<size
, big_endian
>* got
3470 = this->targ_
->got_section();
3471 g_o_t
= got
->address() + got
->g_o_t();
3476 Address off
= plt_addr
- got_addr
;
3479 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
3480 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
3481 write_insn
<big_endian
>(p
+ 8, bctr
);
3485 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
3486 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
3487 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3488 write_insn
<big_endian
>(p
+ 12, bctr
);
3493 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
3494 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
3495 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
3496 write_insn
<big_endian
>(p
+ 12, bctr
);
3501 // Write out long branch stubs.
3502 typename
Branch_stub_entries::const_iterator bs
;
3503 for (bs
= this->long_branch_stubs_
.begin();
3504 bs
!= this->long_branch_stubs_
.end();
3507 p
= oview
+ this->plt_size_
+ bs
->second
;
3508 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3509 Address delta
= bs
->first
.dest_
- loc
;
3510 if (delta
+ (1 << 25) < 2 << 25)
3511 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3512 else if (!parameters
->options().output_is_position_independent())
3514 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
3515 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
3516 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
3517 write_insn
<big_endian
>(p
+ 12, bctr
);
3522 write_insn
<big_endian
>(p
+ 0, mflr_0
);
3523 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
3524 write_insn
<big_endian
>(p
+ 8, mflr_12
);
3525 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
3526 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
3527 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3528 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
3529 write_insn
<big_endian
>(p
+ 28, bctr
);
3535 // Write out .glink.
3537 template<int size
, bool big_endian
>
3539 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
3541 const section_size_type off
= this->offset();
3542 const section_size_type oview_size
=
3543 convert_to_section_size_type(this->data_size());
3544 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3547 // The base address of the .plt section.
3548 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3549 Address plt_base
= this->targ_
->plt_section()->address();
3553 // Write pltresolve stub.
3555 Address after_bcl
= this->address() + 16;
3556 Address pltoff
= plt_base
- after_bcl
;
3558 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
3560 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
3561 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
3562 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
3563 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
3564 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
3565 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
3566 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
3567 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
3568 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3569 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
3570 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
3571 while (p
< oview
+ this->pltresolve_size
)
3572 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3574 // Write lazy link call stubs.
3576 while (p
< oview
+ oview_size
)
3580 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
3584 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
3585 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
3587 uint32_t branch_off
= 8 - (p
- oview
);
3588 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
3594 const Output_data_got_powerpc
<size
, big_endian
>* got
3595 = this->targ_
->got_section();
3596 // The address of _GLOBAL_OFFSET_TABLE_.
3597 Address g_o_t
= got
->address() + got
->g_o_t();
3599 // Write out pltresolve branch table.
3601 unsigned int the_end
= oview_size
- this->pltresolve_size
;
3602 unsigned char* end_p
= oview
+ the_end
;
3603 while (p
< end_p
- 8 * 4)
3604 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
3606 write_insn
<big_endian
>(p
, nop
), p
+= 4;
3608 // Write out pltresolve call stub.
3609 if (parameters
->options().output_is_position_independent())
3611 Address res0_off
= 0;
3612 Address after_bcl_off
= the_end
+ 12;
3613 Address bcl_res0
= after_bcl_off
- res0_off
;
3615 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
3616 write_insn
<big_endian
>(p
+ 4, mflr_0
);
3617 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
3618 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
3619 write_insn
<big_endian
>(p
+ 16, mflr_12
);
3620 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
3621 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
3623 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
3625 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
3626 if (ha(got_bcl
) == ha(got_bcl
+ 4))
3628 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
3629 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
3633 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
3634 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
3636 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
3637 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
3638 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
3639 write_insn
<big_endian
>(p
+ 52, bctr
);
3640 write_insn
<big_endian
>(p
+ 56, nop
);
3641 write_insn
<big_endian
>(p
+ 60, nop
);
3645 Address res0
= this->address();
3647 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
3648 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
3649 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3650 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
3652 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
3653 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
3654 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
3655 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
3656 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
3657 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
3659 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
3660 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
3661 write_insn
<big_endian
>(p
+ 32, bctr
);
3662 write_insn
<big_endian
>(p
+ 36, nop
);
3663 write_insn
<big_endian
>(p
+ 40, nop
);
3664 write_insn
<big_endian
>(p
+ 44, nop
);
3665 write_insn
<big_endian
>(p
+ 48, nop
);
3666 write_insn
<big_endian
>(p
+ 52, nop
);
3667 write_insn
<big_endian
>(p
+ 56, nop
);
3668 write_insn
<big_endian
>(p
+ 60, nop
);
3673 of
->write_output_view(off
, oview_size
, oview
);
3677 // A class to handle linker generated save/restore functions.
3679 template<int size
, bool big_endian
>
3680 class Output_data_save_res
: public Output_section_data_build
3683 Output_data_save_res(Symbol_table
* symtab
);
3686 // Write to a map file.
3688 do_print_to_mapfile(Mapfile
* mapfile
) const
3689 { mapfile
->print_output_data(this, _("** save/restore")); }
3692 do_write(Output_file
*);
3695 // The maximum size of save/restore contents.
3696 static const unsigned int savres_max
= 218*4;
3699 savres_define(Symbol_table
* symtab
,
3701 unsigned int lo
, unsigned int hi
,
3702 unsigned char* write_ent(unsigned char*, int),
3703 unsigned char* write_tail(unsigned char*, int));
3705 unsigned char *contents_
;
3708 template<bool big_endian
>
3709 static unsigned char*
3710 savegpr0(unsigned char* p
, int r
)
3712 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3713 write_insn
<big_endian
>(p
, insn
);
3717 template<bool big_endian
>
3718 static unsigned char*
3719 savegpr0_tail(unsigned char* p
, int r
)
3721 p
= savegpr0
<big_endian
>(p
, r
);
3722 uint32_t insn
= std_0_1
+ 16;
3723 write_insn
<big_endian
>(p
, insn
);
3725 write_insn
<big_endian
>(p
, blr
);
3729 template<bool big_endian
>
3730 static unsigned char*
3731 restgpr0(unsigned char* p
, int r
)
3733 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3734 write_insn
<big_endian
>(p
, insn
);
3738 template<bool big_endian
>
3739 static unsigned char*
3740 restgpr0_tail(unsigned char* p
, int r
)
3742 uint32_t insn
= ld_0_1
+ 16;
3743 write_insn
<big_endian
>(p
, insn
);
3745 p
= restgpr0
<big_endian
>(p
, r
);
3746 write_insn
<big_endian
>(p
, mtlr_0
);
3750 p
= restgpr0
<big_endian
>(p
, 30);
3751 p
= restgpr0
<big_endian
>(p
, 31);
3753 write_insn
<big_endian
>(p
, blr
);
3757 template<bool big_endian
>
3758 static unsigned char*
3759 savegpr1(unsigned char* p
, int r
)
3761 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3762 write_insn
<big_endian
>(p
, insn
);
3766 template<bool big_endian
>
3767 static unsigned char*
3768 savegpr1_tail(unsigned char* p
, int r
)
3770 p
= savegpr1
<big_endian
>(p
, r
);
3771 write_insn
<big_endian
>(p
, blr
);
3775 template<bool big_endian
>
3776 static unsigned char*
3777 restgpr1(unsigned char* p
, int r
)
3779 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3780 write_insn
<big_endian
>(p
, insn
);
3784 template<bool big_endian
>
3785 static unsigned char*
3786 restgpr1_tail(unsigned char* p
, int r
)
3788 p
= restgpr1
<big_endian
>(p
, r
);
3789 write_insn
<big_endian
>(p
, blr
);
3793 template<bool big_endian
>
3794 static unsigned char*
3795 savefpr(unsigned char* p
, int r
)
3797 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3798 write_insn
<big_endian
>(p
, insn
);
3802 template<bool big_endian
>
3803 static unsigned char*
3804 savefpr0_tail(unsigned char* p
, int r
)
3806 p
= savefpr
<big_endian
>(p
, r
);
3807 write_insn
<big_endian
>(p
, std_0_1
+ 16);
3809 write_insn
<big_endian
>(p
, blr
);
3813 template<bool big_endian
>
3814 static unsigned char*
3815 restfpr(unsigned char* p
, int r
)
3817 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
3818 write_insn
<big_endian
>(p
, insn
);
3822 template<bool big_endian
>
3823 static unsigned char*
3824 restfpr0_tail(unsigned char* p
, int r
)
3826 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
3828 p
= restfpr
<big_endian
>(p
, r
);
3829 write_insn
<big_endian
>(p
, mtlr_0
);
3833 p
= restfpr
<big_endian
>(p
, 30);
3834 p
= restfpr
<big_endian
>(p
, 31);
3836 write_insn
<big_endian
>(p
, blr
);
3840 template<bool big_endian
>
3841 static unsigned char*
3842 savefpr1_tail(unsigned char* p
, int r
)
3844 p
= savefpr
<big_endian
>(p
, r
);
3845 write_insn
<big_endian
>(p
, blr
);
3849 template<bool big_endian
>
3850 static unsigned char*
3851 restfpr1_tail(unsigned char* p
, int r
)
3853 p
= restfpr
<big_endian
>(p
, r
);
3854 write_insn
<big_endian
>(p
, blr
);
3858 template<bool big_endian
>
3859 static unsigned char*
3860 savevr(unsigned char* p
, int r
)
3862 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3863 write_insn
<big_endian
>(p
, insn
);
3865 insn
= stvx_0_12_0
+ (r
<< 21);
3866 write_insn
<big_endian
>(p
, insn
);
3870 template<bool big_endian
>
3871 static unsigned char*
3872 savevr_tail(unsigned char* p
, int r
)
3874 p
= savevr
<big_endian
>(p
, r
);
3875 write_insn
<big_endian
>(p
, blr
);
3879 template<bool big_endian
>
3880 static unsigned char*
3881 restvr(unsigned char* p
, int r
)
3883 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
3884 write_insn
<big_endian
>(p
, insn
);
3886 insn
= lvx_0_12_0
+ (r
<< 21);
3887 write_insn
<big_endian
>(p
, insn
);
3891 template<bool big_endian
>
3892 static unsigned char*
3893 restvr_tail(unsigned char* p
, int r
)
3895 p
= restvr
<big_endian
>(p
, r
);
3896 write_insn
<big_endian
>(p
, blr
);
3901 template<int size
, bool big_endian
>
3902 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
3903 Symbol_table
* symtab
)
3904 : Output_section_data_build(4),
3907 this->savres_define(symtab
,
3908 "_savegpr0_", 14, 31,
3909 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
3910 this->savres_define(symtab
,
3911 "_restgpr0_", 14, 29,
3912 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3913 this->savres_define(symtab
,
3914 "_restgpr0_", 30, 31,
3915 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
3916 this->savres_define(symtab
,
3917 "_savegpr1_", 14, 31,
3918 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
3919 this->savres_define(symtab
,
3920 "_restgpr1_", 14, 31,
3921 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
3922 this->savres_define(symtab
,
3923 "_savefpr_", 14, 31,
3924 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
3925 this->savres_define(symtab
,
3926 "_restfpr_", 14, 29,
3927 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
3928 this->savres_define(symtab
,
3929 "_restfpr_", 30, 31,
3930 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
3931 this->savres_define(symtab
,
3933 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
3934 this->savres_define(symtab
,
3936 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
3937 this->savres_define(symtab
,
3939 savevr
<big_endian
>, savevr_tail
<big_endian
>);
3940 this->savres_define(symtab
,
3942 restvr
<big_endian
>, restvr_tail
<big_endian
>);
3945 template<int size
, bool big_endian
>
3947 Output_data_save_res
<size
, big_endian
>::savres_define(
3948 Symbol_table
* symtab
,
3950 unsigned int lo
, unsigned int hi
,
3951 unsigned char* write_ent(unsigned char*, int),
3952 unsigned char* write_tail(unsigned char*, int))
3954 size_t len
= strlen(name
);
3955 bool writing
= false;
3958 memcpy(sym
, name
, len
);
3961 for (unsigned int i
= lo
; i
<= hi
; i
++)
3963 sym
[len
+ 0] = i
/ 10 + '0';
3964 sym
[len
+ 1] = i
% 10 + '0';
3965 Symbol
* gsym
= symtab
->lookup(sym
);
3966 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
3967 writing
= writing
|| refd
;
3970 if (this->contents_
== NULL
)
3971 this->contents_
= new unsigned char[this->savres_max
];
3973 section_size_type value
= this->current_data_size();
3974 unsigned char* p
= this->contents_
+ value
;
3976 p
= write_ent(p
, i
);
3978 p
= write_tail(p
, i
);
3979 section_size_type cur_size
= p
- this->contents_
;
3980 this->set_current_data_size(cur_size
);
3982 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
3983 this, value
, cur_size
- value
,
3984 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
3985 elfcpp::STV_HIDDEN
, 0, false, false);
3990 // Write out save/restore.
3992 template<int size
, bool big_endian
>
3994 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
3996 const section_size_type off
= this->offset();
3997 const section_size_type oview_size
=
3998 convert_to_section_size_type(this->data_size());
3999 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4000 memcpy(oview
, this->contents_
, oview_size
);
4001 of
->write_output_view(off
, oview_size
, oview
);
4005 // Create the glink section.
4007 template<int size
, bool big_endian
>
4009 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4011 if (this->glink_
== NULL
)
4013 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4014 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4015 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4016 this->glink_
, ORDER_TEXT
, false);
4020 // Create a PLT entry for a global symbol.
4022 template<int size
, bool big_endian
>
4024 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4028 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4029 && gsym
->can_use_relative_reloc(false))
4031 if (this->iplt_
== NULL
)
4032 this->make_iplt_section(symtab
, layout
);
4033 this->iplt_
->add_ifunc_entry(gsym
);
4037 if (this->plt_
== NULL
)
4038 this->make_plt_section(symtab
, layout
);
4039 this->plt_
->add_entry(gsym
);
4043 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4045 template<int size
, bool big_endian
>
4047 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4048 Symbol_table
* symtab
,
4050 Sized_relobj_file
<size
, big_endian
>* relobj
,
4053 if (this->iplt_
== NULL
)
4054 this->make_iplt_section(symtab
, layout
);
4055 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4058 // Return the number of entries in the PLT.
4060 template<int size
, bool big_endian
>
4062 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4064 if (this->plt_
== NULL
)
4066 unsigned int count
= this->plt_
->entry_count();
4067 if (this->iplt_
!= NULL
)
4068 count
+= this->iplt_
->entry_count();
4072 // Return the offset of the first non-reserved PLT entry.
4074 template<int size
, bool big_endian
>
4076 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4078 return this->plt_
->first_plt_entry_offset();
4081 // Return the size of each PLT entry.
4083 template<int size
, bool big_endian
>
4085 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4087 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4090 // Create a GOT entry for local dynamic __tls_get_addr calls.
4092 template<int size
, bool big_endian
>
4094 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4095 Symbol_table
* symtab
,
4097 Sized_relobj_file
<size
, big_endian
>* object
)
4099 if (this->tlsld_got_offset_
== -1U)
4101 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4102 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4103 Output_data_got_powerpc
<size
, big_endian
>* got
4104 = this->got_section(symtab
, layout
);
4105 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4106 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4108 this->tlsld_got_offset_
= got_offset
;
4110 return this->tlsld_got_offset_
;
4113 // Get the Reference_flags for a particular relocation.
4115 template<int size
, bool big_endian
>
4117 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4121 case elfcpp::R_POWERPC_NONE
:
4122 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4123 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4124 case elfcpp::R_PPC64_TOC
:
4125 // No symbol reference.
4128 case elfcpp::R_PPC64_ADDR64
:
4129 case elfcpp::R_PPC64_UADDR64
:
4130 case elfcpp::R_POWERPC_ADDR32
:
4131 case elfcpp::R_POWERPC_UADDR32
:
4132 case elfcpp::R_POWERPC_ADDR16
:
4133 case elfcpp::R_POWERPC_UADDR16
:
4134 case elfcpp::R_POWERPC_ADDR16_LO
:
4135 case elfcpp::R_POWERPC_ADDR16_HI
:
4136 case elfcpp::R_POWERPC_ADDR16_HA
:
4137 return Symbol::ABSOLUTE_REF
;
4139 case elfcpp::R_POWERPC_ADDR24
:
4140 case elfcpp::R_POWERPC_ADDR14
:
4141 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4142 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4143 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4145 case elfcpp::R_PPC64_REL64
:
4146 case elfcpp::R_POWERPC_REL32
:
4147 case elfcpp::R_PPC_LOCAL24PC
:
4148 case elfcpp::R_POWERPC_REL16
:
4149 case elfcpp::R_POWERPC_REL16_LO
:
4150 case elfcpp::R_POWERPC_REL16_HI
:
4151 case elfcpp::R_POWERPC_REL16_HA
:
4152 return Symbol::RELATIVE_REF
;
4154 case elfcpp::R_POWERPC_REL24
:
4155 case elfcpp::R_PPC_PLTREL24
:
4156 case elfcpp::R_POWERPC_REL14
:
4157 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4158 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4159 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4161 case elfcpp::R_POWERPC_GOT16
:
4162 case elfcpp::R_POWERPC_GOT16_LO
:
4163 case elfcpp::R_POWERPC_GOT16_HI
:
4164 case elfcpp::R_POWERPC_GOT16_HA
:
4165 case elfcpp::R_PPC64_GOT16_DS
:
4166 case elfcpp::R_PPC64_GOT16_LO_DS
:
4167 case elfcpp::R_PPC64_TOC16
:
4168 case elfcpp::R_PPC64_TOC16_LO
:
4169 case elfcpp::R_PPC64_TOC16_HI
:
4170 case elfcpp::R_PPC64_TOC16_HA
:
4171 case elfcpp::R_PPC64_TOC16_DS
:
4172 case elfcpp::R_PPC64_TOC16_LO_DS
:
4174 return Symbol::ABSOLUTE_REF
;
4176 case elfcpp::R_POWERPC_GOT_TPREL16
:
4177 case elfcpp::R_POWERPC_TLS
:
4178 return Symbol::TLS_REF
;
4180 case elfcpp::R_POWERPC_COPY
:
4181 case elfcpp::R_POWERPC_GLOB_DAT
:
4182 case elfcpp::R_POWERPC_JMP_SLOT
:
4183 case elfcpp::R_POWERPC_RELATIVE
:
4184 case elfcpp::R_POWERPC_DTPMOD
:
4186 // Not expected. We will give an error later.
4191 // Report an unsupported relocation against a local symbol.
4193 template<int size
, bool big_endian
>
4195 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4196 Sized_relobj_file
<size
, big_endian
>* object
,
4197 unsigned int r_type
)
4199 gold_error(_("%s: unsupported reloc %u against local symbol"),
4200 object
->name().c_str(), r_type
);
4203 // We are about to emit a dynamic relocation of type R_TYPE. If the
4204 // dynamic linker does not support it, issue an error.
4206 template<int size
, bool big_endian
>
4208 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4209 unsigned int r_type
)
4211 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4213 // These are the relocation types supported by glibc for both 32-bit
4214 // and 64-bit powerpc.
4217 case elfcpp::R_POWERPC_NONE
:
4218 case elfcpp::R_POWERPC_RELATIVE
:
4219 case elfcpp::R_POWERPC_GLOB_DAT
:
4220 case elfcpp::R_POWERPC_DTPMOD
:
4221 case elfcpp::R_POWERPC_DTPREL
:
4222 case elfcpp::R_POWERPC_TPREL
:
4223 case elfcpp::R_POWERPC_JMP_SLOT
:
4224 case elfcpp::R_POWERPC_COPY
:
4225 case elfcpp::R_POWERPC_IRELATIVE
:
4226 case elfcpp::R_POWERPC_ADDR32
:
4227 case elfcpp::R_POWERPC_UADDR32
:
4228 case elfcpp::R_POWERPC_ADDR24
:
4229 case elfcpp::R_POWERPC_ADDR16
:
4230 case elfcpp::R_POWERPC_UADDR16
:
4231 case elfcpp::R_POWERPC_ADDR16_LO
:
4232 case elfcpp::R_POWERPC_ADDR16_HI
:
4233 case elfcpp::R_POWERPC_ADDR16_HA
:
4234 case elfcpp::R_POWERPC_ADDR14
:
4235 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4236 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4237 case elfcpp::R_POWERPC_REL32
:
4238 case elfcpp::R_POWERPC_REL24
:
4239 case elfcpp::R_POWERPC_TPREL16
:
4240 case elfcpp::R_POWERPC_TPREL16_LO
:
4241 case elfcpp::R_POWERPC_TPREL16_HI
:
4242 case elfcpp::R_POWERPC_TPREL16_HA
:
4253 // These are the relocation types supported only on 64-bit.
4254 case elfcpp::R_PPC64_ADDR64
:
4255 case elfcpp::R_PPC64_UADDR64
:
4256 case elfcpp::R_PPC64_JMP_IREL
:
4257 case elfcpp::R_PPC64_ADDR16_DS
:
4258 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4259 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4260 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4261 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4262 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4263 case elfcpp::R_PPC64_REL64
:
4264 case elfcpp::R_POWERPC_ADDR30
:
4265 case elfcpp::R_PPC64_TPREL16_DS
:
4266 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4267 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4268 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4269 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4270 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4281 // These are the relocation types supported only on 32-bit.
4282 // ??? glibc ld.so doesn't need to support these.
4283 case elfcpp::R_POWERPC_DTPREL16
:
4284 case elfcpp::R_POWERPC_DTPREL16_LO
:
4285 case elfcpp::R_POWERPC_DTPREL16_HI
:
4286 case elfcpp::R_POWERPC_DTPREL16_HA
:
4294 // This prevents us from issuing more than one error per reloc
4295 // section. But we can still wind up issuing more than one
4296 // error per object file.
4297 if (this->issued_non_pic_error_
)
4299 gold_assert(parameters
->options().output_is_position_independent());
4300 object
->error(_("requires unsupported dynamic reloc; "
4301 "recompile with -fPIC"));
4302 this->issued_non_pic_error_
= true;
4306 // Return whether we need to make a PLT entry for a relocation of the
4307 // given type against a STT_GNU_IFUNC symbol.
4309 template<int size
, bool big_endian
>
4311 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4312 Sized_relobj_file
<size
, big_endian
>* object
,
4313 unsigned int r_type
)
4315 // In non-pic code any reference will resolve to the plt call stub
4316 // for the ifunc symbol.
4317 if (size
== 32 && !parameters
->options().output_is_position_independent())
4322 // Word size refs from data sections are OK.
4323 case elfcpp::R_POWERPC_ADDR32
:
4324 case elfcpp::R_POWERPC_UADDR32
:
4329 case elfcpp::R_PPC64_ADDR64
:
4330 case elfcpp::R_PPC64_UADDR64
:
4335 // GOT refs are good.
4336 case elfcpp::R_POWERPC_GOT16
:
4337 case elfcpp::R_POWERPC_GOT16_LO
:
4338 case elfcpp::R_POWERPC_GOT16_HI
:
4339 case elfcpp::R_POWERPC_GOT16_HA
:
4340 case elfcpp::R_PPC64_GOT16_DS
:
4341 case elfcpp::R_PPC64_GOT16_LO_DS
:
4344 // So are function calls.
4345 case elfcpp::R_POWERPC_ADDR24
:
4346 case elfcpp::R_POWERPC_ADDR14
:
4347 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4348 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4349 case elfcpp::R_POWERPC_REL24
:
4350 case elfcpp::R_PPC_PLTREL24
:
4351 case elfcpp::R_POWERPC_REL14
:
4352 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4353 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4360 // Anything else is a problem.
4361 // If we are building a static executable, the libc startup function
4362 // responsible for applying indirect function relocations is going
4363 // to complain about the reloc type.
4364 // If we are building a dynamic executable, we will have a text
4365 // relocation. The dynamic loader will set the text segment
4366 // writable and non-executable to apply text relocations. So we'll
4367 // segfault when trying to run the indirection function to resolve
4369 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4370 object
->name().c_str(), r_type
);
4374 // Scan a relocation for a local symbol.
4376 template<int size
, bool big_endian
>
4378 Target_powerpc
<size
, big_endian
>::Scan::local(
4379 Symbol_table
* symtab
,
4381 Target_powerpc
<size
, big_endian
>* target
,
4382 Sized_relobj_file
<size
, big_endian
>* object
,
4383 unsigned int data_shndx
,
4384 Output_section
* output_section
,
4385 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4386 unsigned int r_type
,
4387 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4390 Powerpc_relobj
<size
, big_endian
>* ppc_object
4391 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4396 && data_shndx
== ppc_object
->opd_shndx()
4397 && r_type
== elfcpp::R_PPC64_ADDR64
)
4398 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4402 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4403 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4404 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
4406 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4407 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4408 r_type
, r_sym
, reloc
.get_r_addend());
4409 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4414 case elfcpp::R_POWERPC_NONE
:
4415 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4416 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4417 case elfcpp::R_PPC64_TOCSAVE
:
4418 case elfcpp::R_PPC_EMB_MRKREF
:
4419 case elfcpp::R_POWERPC_TLS
:
4422 case elfcpp::R_PPC64_TOC
:
4424 Output_data_got_powerpc
<size
, big_endian
>* got
4425 = target
->got_section(symtab
, layout
);
4426 if (parameters
->options().output_is_position_independent())
4428 Address off
= reloc
.get_r_offset();
4430 && data_shndx
== ppc_object
->opd_shndx()
4431 && ppc_object
->get_opd_discard(off
- 8))
4434 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4435 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4436 rela_dyn
->add_output_section_relative(got
->output_section(),
4437 elfcpp::R_POWERPC_RELATIVE
,
4439 object
, data_shndx
, off
,
4440 symobj
->toc_base_offset());
4445 case elfcpp::R_PPC64_ADDR64
:
4446 case elfcpp::R_PPC64_UADDR64
:
4447 case elfcpp::R_POWERPC_ADDR32
:
4448 case elfcpp::R_POWERPC_UADDR32
:
4449 case elfcpp::R_POWERPC_ADDR24
:
4450 case elfcpp::R_POWERPC_ADDR16
:
4451 case elfcpp::R_POWERPC_ADDR16_LO
:
4452 case elfcpp::R_POWERPC_ADDR16_HI
:
4453 case elfcpp::R_POWERPC_ADDR16_HA
:
4454 case elfcpp::R_POWERPC_UADDR16
:
4455 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4456 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4457 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4458 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4459 case elfcpp::R_PPC64_ADDR16_DS
:
4460 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4461 case elfcpp::R_POWERPC_ADDR14
:
4462 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4463 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4464 // If building a shared library (or a position-independent
4465 // executable), we need to create a dynamic relocation for
4467 if (parameters
->options().output_is_position_independent()
4468 || (size
== 64 && is_ifunc
))
4470 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4472 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
4473 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
4475 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4476 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4479 rela_dyn
= target
->iplt_section()->rel_plt();
4480 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4482 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4483 output_section
, data_shndx
,
4484 reloc
.get_r_offset(),
4485 reloc
.get_r_addend(), false);
4489 check_non_pic(object
, r_type
);
4490 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4491 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
4492 data_shndx
, reloc
.get_r_offset(),
4493 reloc
.get_r_addend());
4498 case elfcpp::R_POWERPC_REL24
:
4499 case elfcpp::R_PPC_PLTREL24
:
4500 case elfcpp::R_PPC_LOCAL24PC
:
4501 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4502 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4503 reloc
.get_r_addend());
4506 case elfcpp::R_POWERPC_REL14
:
4507 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4508 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4509 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4510 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4511 reloc
.get_r_addend());
4514 case elfcpp::R_PPC64_REL64
:
4515 case elfcpp::R_POWERPC_REL32
:
4516 case elfcpp::R_POWERPC_REL16
:
4517 case elfcpp::R_POWERPC_REL16_LO
:
4518 case elfcpp::R_POWERPC_REL16_HI
:
4519 case elfcpp::R_POWERPC_REL16_HA
:
4520 case elfcpp::R_POWERPC_SECTOFF
:
4521 case elfcpp::R_POWERPC_TPREL16
:
4522 case elfcpp::R_POWERPC_DTPREL16
:
4523 case elfcpp::R_POWERPC_SECTOFF_LO
:
4524 case elfcpp::R_POWERPC_TPREL16_LO
:
4525 case elfcpp::R_POWERPC_DTPREL16_LO
:
4526 case elfcpp::R_POWERPC_SECTOFF_HI
:
4527 case elfcpp::R_POWERPC_TPREL16_HI
:
4528 case elfcpp::R_POWERPC_DTPREL16_HI
:
4529 case elfcpp::R_POWERPC_SECTOFF_HA
:
4530 case elfcpp::R_POWERPC_TPREL16_HA
:
4531 case elfcpp::R_POWERPC_DTPREL16_HA
:
4532 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4533 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4534 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4535 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4536 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4537 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4538 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4539 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4540 case elfcpp::R_PPC64_TPREL16_DS
:
4541 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4542 case elfcpp::R_PPC64_DTPREL16_DS
:
4543 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4544 case elfcpp::R_PPC64_SECTOFF_DS
:
4545 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4546 case elfcpp::R_PPC64_TLSGD
:
4547 case elfcpp::R_PPC64_TLSLD
:
4550 case elfcpp::R_POWERPC_GOT16
:
4551 case elfcpp::R_POWERPC_GOT16_LO
:
4552 case elfcpp::R_POWERPC_GOT16_HI
:
4553 case elfcpp::R_POWERPC_GOT16_HA
:
4554 case elfcpp::R_PPC64_GOT16_DS
:
4555 case elfcpp::R_PPC64_GOT16_LO_DS
:
4557 // The symbol requires a GOT entry.
4558 Output_data_got_powerpc
<size
, big_endian
>* got
4559 = target
->got_section(symtab
, layout
);
4560 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4562 if (!parameters
->options().output_is_position_independent())
4564 if (size
== 32 && is_ifunc
)
4565 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
4567 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
4569 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
4571 // If we are generating a shared object or a pie, this
4572 // symbol's GOT entry will be set by a dynamic relocation.
4574 off
= got
->add_constant(0);
4575 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
4577 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4578 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4581 rela_dyn
= target
->iplt_section()->rel_plt();
4582 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4584 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
4585 got
, off
, 0, false);
4590 case elfcpp::R_PPC64_TOC16
:
4591 case elfcpp::R_PPC64_TOC16_LO
:
4592 case elfcpp::R_PPC64_TOC16_HI
:
4593 case elfcpp::R_PPC64_TOC16_HA
:
4594 case elfcpp::R_PPC64_TOC16_DS
:
4595 case elfcpp::R_PPC64_TOC16_LO_DS
:
4596 // We need a GOT section.
4597 target
->got_section(symtab
, layout
);
4600 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4601 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4602 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4603 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4605 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4606 if (tls_type
== tls::TLSOPT_NONE
)
4608 Output_data_got_powerpc
<size
, big_endian
>* got
4609 = target
->got_section(symtab
, layout
);
4610 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4611 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4612 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
4613 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
4615 else if (tls_type
== tls::TLSOPT_TO_LE
)
4617 // no GOT relocs needed for Local Exec.
4624 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4625 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4626 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4627 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4629 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4630 if (tls_type
== tls::TLSOPT_NONE
)
4631 target
->tlsld_got_offset(symtab
, layout
, object
);
4632 else if (tls_type
== tls::TLSOPT_TO_LE
)
4634 // no GOT relocs needed for Local Exec.
4635 if (parameters
->options().emit_relocs())
4637 Output_section
* os
= layout
->tls_segment()->first_section();
4638 gold_assert(os
!= NULL
);
4639 os
->set_needs_symtab_index();
4647 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4648 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4649 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4650 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4652 Output_data_got_powerpc
<size
, big_endian
>* got
4653 = target
->got_section(symtab
, layout
);
4654 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4655 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
4659 case elfcpp::R_POWERPC_GOT_TPREL16
:
4660 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4661 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4662 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4664 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
4665 if (tls_type
== tls::TLSOPT_NONE
)
4667 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4668 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
4670 Output_data_got_powerpc
<size
, big_endian
>* got
4671 = target
->got_section(symtab
, layout
);
4672 unsigned int off
= got
->add_constant(0);
4673 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
4675 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4676 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
4677 elfcpp::R_POWERPC_TPREL
,
4681 else if (tls_type
== tls::TLSOPT_TO_LE
)
4683 // no GOT relocs needed for Local Exec.
4691 unsupported_reloc_local(object
, r_type
);
4696 // Report an unsupported relocation against a global symbol.
4698 template<int size
, bool big_endian
>
4700 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
4701 Sized_relobj_file
<size
, big_endian
>* object
,
4702 unsigned int r_type
,
4705 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4706 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
4709 // Scan a relocation for a global symbol.
4711 template<int size
, bool big_endian
>
4713 Target_powerpc
<size
, big_endian
>::Scan::global(
4714 Symbol_table
* symtab
,
4716 Target_powerpc
<size
, big_endian
>* target
,
4717 Sized_relobj_file
<size
, big_endian
>* object
,
4718 unsigned int data_shndx
,
4719 Output_section
* output_section
,
4720 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4721 unsigned int r_type
,
4724 Powerpc_relobj
<size
, big_endian
>* ppc_object
4725 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4727 // A STT_GNU_IFUNC symbol may require a PLT entry.
4728 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4729 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
4731 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4732 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4733 reloc
.get_r_addend());
4734 target
->make_plt_entry(symtab
, layout
, gsym
);
4739 case elfcpp::R_POWERPC_NONE
:
4740 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4741 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4742 case elfcpp::R_PPC_LOCAL24PC
:
4743 case elfcpp::R_PPC_EMB_MRKREF
:
4744 case elfcpp::R_POWERPC_TLS
:
4747 case elfcpp::R_PPC64_TOC
:
4749 Output_data_got_powerpc
<size
, big_endian
>* got
4750 = target
->got_section(symtab
, layout
);
4751 if (parameters
->options().output_is_position_independent())
4753 Address off
= reloc
.get_r_offset();
4755 && data_shndx
== ppc_object
->opd_shndx()
4756 && ppc_object
->get_opd_discard(off
- 8))
4759 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4760 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
4761 if (data_shndx
!= ppc_object
->opd_shndx())
4762 symobj
= static_cast
4763 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4764 rela_dyn
->add_output_section_relative(got
->output_section(),
4765 elfcpp::R_POWERPC_RELATIVE
,
4767 object
, data_shndx
, off
,
4768 symobj
->toc_base_offset());
4773 case elfcpp::R_PPC64_ADDR64
:
4775 && data_shndx
== ppc_object
->opd_shndx()
4776 && (gsym
->is_defined_in_discarded_section()
4777 || gsym
->object() != object
))
4779 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4783 case elfcpp::R_PPC64_UADDR64
:
4784 case elfcpp::R_POWERPC_ADDR32
:
4785 case elfcpp::R_POWERPC_UADDR32
:
4786 case elfcpp::R_POWERPC_ADDR24
:
4787 case elfcpp::R_POWERPC_ADDR16
:
4788 case elfcpp::R_POWERPC_ADDR16_LO
:
4789 case elfcpp::R_POWERPC_ADDR16_HI
:
4790 case elfcpp::R_POWERPC_ADDR16_HA
:
4791 case elfcpp::R_POWERPC_UADDR16
:
4792 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4793 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4794 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4795 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4796 case elfcpp::R_PPC64_ADDR16_DS
:
4797 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4798 case elfcpp::R_POWERPC_ADDR14
:
4799 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4800 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4802 // Make a PLT entry if necessary.
4803 if (gsym
->needs_plt_entry())
4805 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4807 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4808 reloc
.get_r_addend());
4809 target
->make_plt_entry(symtab
, layout
, gsym
);
4810 // Since this is not a PC-relative relocation, we may be
4811 // taking the address of a function. In that case we need to
4812 // set the entry in the dynamic symbol table to the address of
4813 // the PLT call stub.
4815 && gsym
->is_from_dynobj()
4816 && !parameters
->options().output_is_position_independent())
4817 gsym
->set_needs_dynsym_value();
4819 // Make a dynamic relocation if necessary.
4820 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4821 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
4823 if (gsym
->may_need_copy_reloc())
4825 target
->copy_reloc(symtab
, layout
, object
,
4826 data_shndx
, output_section
, gsym
, reloc
);
4828 else if ((size
== 32
4829 && r_type
== elfcpp::R_POWERPC_ADDR32
4830 && gsym
->can_use_relative_reloc(false)
4831 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
4832 && parameters
->options().shared()))
4834 && r_type
== elfcpp::R_PPC64_ADDR64
4835 && (gsym
->can_use_relative_reloc(false)
4836 || data_shndx
== ppc_object
->opd_shndx())))
4838 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4839 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4840 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4842 rela_dyn
= target
->iplt_section()->rel_plt();
4843 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4845 rela_dyn
->add_symbolless_global_addend(
4846 gsym
, dynrel
, output_section
, object
, data_shndx
,
4847 reloc
.get_r_offset(), reloc
.get_r_addend());
4851 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4852 check_non_pic(object
, r_type
);
4853 rela_dyn
->add_global(gsym
, r_type
, output_section
,
4855 reloc
.get_r_offset(),
4856 reloc
.get_r_addend());
4862 case elfcpp::R_PPC_PLTREL24
:
4863 case elfcpp::R_POWERPC_REL24
:
4864 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4865 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4866 reloc
.get_r_addend());
4867 if (gsym
->needs_plt_entry()
4868 || (!gsym
->final_value_is_known()
4869 && (gsym
->is_undefined()
4870 || gsym
->is_from_dynobj()
4871 || gsym
->is_preemptible())))
4872 target
->make_plt_entry(symtab
, layout
, gsym
);
4875 case elfcpp::R_PPC64_REL64
:
4876 case elfcpp::R_POWERPC_REL32
:
4877 // Make a dynamic relocation if necessary.
4878 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
4880 if (gsym
->may_need_copy_reloc())
4882 target
->copy_reloc(symtab
, layout
, object
,
4883 data_shndx
, output_section
, gsym
,
4888 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4889 check_non_pic(object
, r_type
);
4890 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
4891 data_shndx
, reloc
.get_r_offset(),
4892 reloc
.get_r_addend());
4897 case elfcpp::R_POWERPC_REL14
:
4898 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4899 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4900 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4901 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
4902 reloc
.get_r_addend());
4905 case elfcpp::R_POWERPC_REL16
:
4906 case elfcpp::R_POWERPC_REL16_LO
:
4907 case elfcpp::R_POWERPC_REL16_HI
:
4908 case elfcpp::R_POWERPC_REL16_HA
:
4909 case elfcpp::R_POWERPC_SECTOFF
:
4910 case elfcpp::R_POWERPC_TPREL16
:
4911 case elfcpp::R_POWERPC_DTPREL16
:
4912 case elfcpp::R_POWERPC_SECTOFF_LO
:
4913 case elfcpp::R_POWERPC_TPREL16_LO
:
4914 case elfcpp::R_POWERPC_DTPREL16_LO
:
4915 case elfcpp::R_POWERPC_SECTOFF_HI
:
4916 case elfcpp::R_POWERPC_TPREL16_HI
:
4917 case elfcpp::R_POWERPC_DTPREL16_HI
:
4918 case elfcpp::R_POWERPC_SECTOFF_HA
:
4919 case elfcpp::R_POWERPC_TPREL16_HA
:
4920 case elfcpp::R_POWERPC_DTPREL16_HA
:
4921 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4922 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4923 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4924 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4925 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4926 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4927 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4928 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4929 case elfcpp::R_PPC64_TPREL16_DS
:
4930 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4931 case elfcpp::R_PPC64_DTPREL16_DS
:
4932 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4933 case elfcpp::R_PPC64_SECTOFF_DS
:
4934 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4935 case elfcpp::R_PPC64_TLSGD
:
4936 case elfcpp::R_PPC64_TLSLD
:
4939 case elfcpp::R_POWERPC_GOT16
:
4940 case elfcpp::R_POWERPC_GOT16_LO
:
4941 case elfcpp::R_POWERPC_GOT16_HI
:
4942 case elfcpp::R_POWERPC_GOT16_HA
:
4943 case elfcpp::R_PPC64_GOT16_DS
:
4944 case elfcpp::R_PPC64_GOT16_LO_DS
:
4946 // The symbol requires a GOT entry.
4947 Output_data_got_powerpc
<size
, big_endian
>* got
;
4949 got
= target
->got_section(symtab
, layout
);
4950 if (gsym
->final_value_is_known())
4952 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4953 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
4955 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
4957 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
4959 // If we are generating a shared object or a pie, this
4960 // symbol's GOT entry will be set by a dynamic relocation.
4961 unsigned int off
= got
->add_constant(0);
4962 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
4964 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4965 if (gsym
->can_use_relative_reloc(false)
4967 && gsym
->visibility() == elfcpp::STV_PROTECTED
4968 && parameters
->options().shared()))
4970 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
4971 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
4973 rela_dyn
= target
->iplt_section()->rel_plt();
4974 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
4976 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
4980 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
4981 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
4987 case elfcpp::R_PPC64_TOC16
:
4988 case elfcpp::R_PPC64_TOC16_LO
:
4989 case elfcpp::R_PPC64_TOC16_HI
:
4990 case elfcpp::R_PPC64_TOC16_HA
:
4991 case elfcpp::R_PPC64_TOC16_DS
:
4992 case elfcpp::R_PPC64_TOC16_LO_DS
:
4993 // We need a GOT section.
4994 target
->got_section(symtab
, layout
);
4997 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4998 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4999 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5000 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5002 const bool final
= gsym
->final_value_is_known();
5003 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5004 if (tls_type
== tls::TLSOPT_NONE
)
5006 Output_data_got_powerpc
<size
, big_endian
>* got
5007 = target
->got_section(symtab
, layout
);
5008 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
5009 target
->rela_dyn_section(layout
),
5010 elfcpp::R_POWERPC_DTPMOD
,
5011 elfcpp::R_POWERPC_DTPREL
);
5013 else if (tls_type
== tls::TLSOPT_TO_IE
)
5015 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5017 Output_data_got_powerpc
<size
, big_endian
>* got
5018 = target
->got_section(symtab
, layout
);
5019 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5020 if (gsym
->is_undefined()
5021 || gsym
->is_from_dynobj())
5023 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5024 elfcpp::R_POWERPC_TPREL
);
5028 unsigned int off
= got
->add_constant(0);
5029 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5030 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5031 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5036 else if (tls_type
== tls::TLSOPT_TO_LE
)
5038 // no GOT relocs needed for Local Exec.
5045 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5046 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5047 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5048 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5050 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5051 if (tls_type
== tls::TLSOPT_NONE
)
5052 target
->tlsld_got_offset(symtab
, layout
, object
);
5053 else if (tls_type
== tls::TLSOPT_TO_LE
)
5055 // no GOT relocs needed for Local Exec.
5056 if (parameters
->options().emit_relocs())
5058 Output_section
* os
= layout
->tls_segment()->first_section();
5059 gold_assert(os
!= NULL
);
5060 os
->set_needs_symtab_index();
5068 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5069 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5070 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5071 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5073 Output_data_got_powerpc
<size
, big_endian
>* got
5074 = target
->got_section(symtab
, layout
);
5075 if (!gsym
->final_value_is_known()
5076 && (gsym
->is_from_dynobj()
5077 || gsym
->is_undefined()
5078 || gsym
->is_preemptible()))
5079 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5080 target
->rela_dyn_section(layout
),
5081 elfcpp::R_POWERPC_DTPREL
);
5083 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5087 case elfcpp::R_POWERPC_GOT_TPREL16
:
5088 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5089 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5090 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5092 const bool final
= gsym
->final_value_is_known();
5093 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5094 if (tls_type
== tls::TLSOPT_NONE
)
5096 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5098 Output_data_got_powerpc
<size
, big_endian
>* got
5099 = target
->got_section(symtab
, layout
);
5100 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5101 if (gsym
->is_undefined()
5102 || gsym
->is_from_dynobj())
5104 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5105 elfcpp::R_POWERPC_TPREL
);
5109 unsigned int off
= got
->add_constant(0);
5110 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5111 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5112 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5117 else if (tls_type
== tls::TLSOPT_TO_LE
)
5119 // no GOT relocs needed for Local Exec.
5127 unsupported_reloc_global(object
, r_type
, gsym
);
5132 // Process relocations for gc.
5134 template<int size
, bool big_endian
>
5136 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5137 Symbol_table
* symtab
,
5139 Sized_relobj_file
<size
, big_endian
>* object
,
5140 unsigned int data_shndx
,
5142 const unsigned char* prelocs
,
5144 Output_section
* output_section
,
5145 bool needs_special_offset_handling
,
5146 size_t local_symbol_count
,
5147 const unsigned char* plocal_symbols
)
5149 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5150 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5151 Powerpc_relobj
<size
, big_endian
>* ppc_object
5152 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5154 ppc_object
->set_opd_valid();
5155 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5157 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5158 for (p
= ppc_object
->access_from_map()->begin();
5159 p
!= ppc_object
->access_from_map()->end();
5162 Address dst_off
= p
->first
;
5163 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5164 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5165 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5167 Object
* src_obj
= s
->first
;
5168 unsigned int src_indx
= s
->second
;
5169 symtab
->gc()->add_reference(src_obj
, src_indx
,
5170 ppc_object
, dst_indx
);
5174 ppc_object
->access_from_map()->clear();
5175 ppc_object
->process_gc_mark(symtab
);
5176 // Don't look at .opd relocs as .opd will reference everything.
5180 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5181 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5190 needs_special_offset_handling
,
5195 // Handle target specific gc actions when adding a gc reference from
5196 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5197 // and DST_OFF. For powerpc64, this adds a referenc to the code
5198 // section of a function descriptor.
5200 template<int size
, bool big_endian
>
5202 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5203 Symbol_table
* symtab
,
5205 unsigned int src_shndx
,
5207 unsigned int dst_shndx
,
5208 Address dst_off
) const
5210 Powerpc_relobj
<size
, big_endian
>* ppc_object
5211 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5213 && !ppc_object
->is_dynamic()
5214 && dst_shndx
== ppc_object
->opd_shndx())
5216 if (ppc_object
->opd_valid())
5218 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5219 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5223 // If we haven't run scan_opd_relocs, we must delay
5224 // processing this function descriptor reference.
5225 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5230 // Add any special sections for this symbol to the gc work list.
5231 // For powerpc64, this adds the code section of a function
5234 template<int size
, bool big_endian
>
5236 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5237 Symbol_table
* symtab
,
5242 Powerpc_relobj
<size
, big_endian
>* ppc_object
5243 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5245 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5246 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
5248 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5249 Address dst_off
= gsym
->value();
5250 if (ppc_object
->opd_valid())
5252 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5253 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5256 ppc_object
->add_gc_mark(dst_off
);
5261 // Scan relocations for a section.
5263 template<int size
, bool big_endian
>
5265 Target_powerpc
<size
, big_endian
>::scan_relocs(
5266 Symbol_table
* symtab
,
5268 Sized_relobj_file
<size
, big_endian
>* object
,
5269 unsigned int data_shndx
,
5270 unsigned int sh_type
,
5271 const unsigned char* prelocs
,
5273 Output_section
* output_section
,
5274 bool needs_special_offset_handling
,
5275 size_t local_symbol_count
,
5276 const unsigned char* plocal_symbols
)
5278 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5279 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5281 if (sh_type
== elfcpp::SHT_REL
)
5283 gold_error(_("%s: unsupported REL reloc section"),
5284 object
->name().c_str());
5288 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5297 needs_special_offset_handling
,
5302 // Functor class for processing the global symbol table.
5303 // Removes symbols defined on discarded opd entries.
5305 template<bool big_endian
>
5306 class Global_symbol_visitor_opd
5309 Global_symbol_visitor_opd()
5313 operator()(Sized_symbol
<64>* sym
)
5315 if (sym
->has_symtab_index()
5316 || sym
->source() != Symbol::FROM_OBJECT
5317 || !sym
->in_real_elf())
5320 Powerpc_relobj
<64, big_endian
>* symobj
5321 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5322 if (symobj
->is_dynamic()
5323 || symobj
->opd_shndx() == 0)
5327 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5328 if (shndx
== symobj
->opd_shndx()
5329 && symobj
->get_opd_discard(sym
->value()))
5330 sym
->set_symtab_index(-1U);
5334 template<int size
, bool big_endian
>
5336 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5338 Symbol_table
* symtab
)
5342 Output_data_save_res
<64, big_endian
>* savres
5343 = new Output_data_save_res
<64, big_endian
>(symtab
);
5344 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5345 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5346 savres
, ORDER_TEXT
, false);
5350 // Finalize the sections.
5352 template<int size
, bool big_endian
>
5354 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
5356 const Input_objects
*,
5357 Symbol_table
* symtab
)
5359 if (parameters
->doing_static_link())
5361 // At least some versions of glibc elf-init.o have a strong
5362 // reference to __rela_iplt marker syms. A weak ref would be
5364 if (this->iplt_
!= NULL
)
5366 Reloc_section
* rel
= this->iplt_
->rel_plt();
5367 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
5368 Symbol_table::PREDEFINED
, rel
, 0, 0,
5369 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5370 elfcpp::STV_HIDDEN
, 0, false, true);
5371 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
5372 Symbol_table::PREDEFINED
, rel
, 0, 0,
5373 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5374 elfcpp::STV_HIDDEN
, 0, true, true);
5378 symtab
->define_as_constant("__rela_iplt_start", NULL
,
5379 Symbol_table::PREDEFINED
, 0, 0,
5380 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5381 elfcpp::STV_HIDDEN
, 0, true, false);
5382 symtab
->define_as_constant("__rela_iplt_end", NULL
,
5383 Symbol_table::PREDEFINED
, 0, 0,
5384 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
5385 elfcpp::STV_HIDDEN
, 0, true, false);
5391 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
5392 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
5394 if (!parameters
->options().relocatable())
5396 this->define_save_restore_funcs(layout
, symtab
);
5398 // Annoyingly, we need to make these sections now whether or
5399 // not we need them. If we delay until do_relax then we
5400 // need to mess with the relaxation machinery checkpointing.
5401 this->got_section(symtab
, layout
);
5402 this->make_brlt_section(layout
);
5406 // Fill in some more dynamic tags.
5407 Output_data_dynamic
* odyn
= layout
->dynamic_data();
5410 const Reloc_section
* rel_plt
= (this->plt_
== NULL
5412 : this->plt_
->rel_plt());
5413 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
5414 this->rela_dyn_
, true, size
== 32);
5418 if (this->got_
!= NULL
)
5420 this->got_
->finalize_data_size();
5421 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
5422 this->got_
, this->got_
->g_o_t());
5427 if (this->glink_
!= NULL
)
5429 this->glink_
->finalize_data_size();
5430 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
5432 (this->glink_
->pltresolve_size
5438 // Emit any relocs we saved in an attempt to avoid generating COPY
5440 if (this->copy_relocs_
.any_saved_relocs())
5441 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
5444 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5448 ok_lo_toc_insn(uint32_t insn
)
5450 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
5451 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
5452 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
5453 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
5454 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
5455 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
5456 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
5457 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
5458 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
5459 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
5460 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
5461 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
5462 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
5463 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
5464 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5466 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
5467 && ((insn
& 3) == 0 || (insn
& 3) == 3))
5468 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
5471 // Return the value to use for a branch relocation.
5473 template<int size
, bool big_endian
>
5474 typename
elfcpp::Elf_types
<size
>::Elf_Addr
5475 Target_powerpc
<size
, big_endian
>::symval_for_branch(
5477 const Sized_symbol
<size
>* gsym
,
5478 Powerpc_relobj
<size
, big_endian
>* object
,
5479 unsigned int *dest_shndx
)
5485 // If the symbol is defined in an opd section, ie. is a function
5486 // descriptor, use the function descriptor code entry address
5487 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
5489 && gsym
->source() != Symbol::FROM_OBJECT
)
5492 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5493 unsigned int shndx
= symobj
->opd_shndx();
5496 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
5497 gold_assert(opd_addr
!= invalid_address
);
5498 opd_addr
+= symobj
->output_section(shndx
)->address();
5499 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
5502 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
5503 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
5504 gold_assert(sec_addr
!= invalid_address
);
5505 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
5506 value
= sec_addr
+ sec_off
;
5511 // Perform a relocation.
5513 template<int size
, bool big_endian
>
5515 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
5516 const Relocate_info
<size
, big_endian
>* relinfo
,
5517 Target_powerpc
* target
,
5520 const elfcpp::Rela
<size
, big_endian
>& rela
,
5521 unsigned int r_type
,
5522 const Sized_symbol
<size
>* gsym
,
5523 const Symbol_value
<size
>* psymval
,
5524 unsigned char* view
,
5526 section_size_type view_size
)
5528 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
5529 || r_type
== elfcpp::R_PPC_PLTREL24
)
5531 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
5532 enum skip_tls last_tls
= this->call_tls_get_addr_
;
5533 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
5536 if (last_tls
== CALL_NOT_EXPECTED
)
5537 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5538 _("__tls_get_addr call lacks marker reloc"));
5539 else if (last_tls
== CALL_SKIP
)
5542 else if (last_tls
!= CALL_NOT_EXPECTED
)
5543 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5544 _("missing expected __tls_get_addr call"));
5546 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
5547 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
5548 Powerpc_relobj
<size
, big_endian
>* const object
5549 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5551 bool has_plt_value
= false;
5552 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5554 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5555 : object
->local_has_plt_offset(r_sym
))
5557 Stub_table
<size
, big_endian
>* stub_table
5558 = object
->stub_table(relinfo
->data_shndx
);
5559 if (stub_table
== NULL
)
5561 // This is a ref from a data section to an ifunc symbol.
5562 if (target
->stub_tables().size() != 0)
5563 stub_table
= target
->stub_tables()[0];
5565 gold_assert(stub_table
!= NULL
);
5568 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
5569 rela
.get_r_addend());
5571 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
5572 rela
.get_r_addend());
5573 gold_assert(off
!= invalid_address
);
5574 value
= stub_table
->stub_address() + off
;
5575 has_plt_value
= true;
5578 if (r_type
== elfcpp::R_POWERPC_GOT16
5579 || r_type
== elfcpp::R_POWERPC_GOT16_LO
5580 || r_type
== elfcpp::R_POWERPC_GOT16_HI
5581 || r_type
== elfcpp::R_POWERPC_GOT16_HA
5582 || r_type
== elfcpp::R_PPC64_GOT16_DS
5583 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
5587 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
5588 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
5592 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5593 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
5594 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
5596 value
-= target
->got_section()->got_base_offset(object
);
5598 else if (r_type
== elfcpp::R_PPC64_TOC
)
5600 value
= (target
->got_section()->output_section()->address()
5601 + object
->toc_base_offset());
5603 else if (gsym
!= NULL
5604 && (r_type
== elfcpp::R_POWERPC_REL24
5605 || r_type
== elfcpp::R_PPC_PLTREL24
)
5610 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
5611 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
5612 bool can_plt_call
= false;
5613 if (rela
.get_r_offset() + 8 <= view_size
)
5615 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
5616 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
5619 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
5621 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
5622 can_plt_call
= true;
5627 // If we don't have a branch and link followed by a nop,
5628 // we can't go via the plt because there is no place to
5629 // put a toc restoring instruction.
5630 // Unless we know we won't be returning.
5631 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
5632 can_plt_call
= true;
5636 // This is not an error in one special case: A self
5637 // call. It isn't possible to cheaply verify we have
5638 // such a call so just check for a call to the same
5641 Address code
= value
;
5642 if (gsym
->source() == Symbol::FROM_OBJECT
5643 && gsym
->object() == object
)
5645 Address addend
= rela
.get_r_addend();
5646 unsigned int dest_shndx
;
5647 Address opdent
= psymval
->value(object
, addend
);
5648 code
= target
->symval_for_branch(opdent
, gsym
, object
,
5651 if (dest_shndx
== 0)
5652 dest_shndx
= gsym
->shndx(&is_ordinary
);
5653 ok
= dest_shndx
== relinfo
->data_shndx
;
5657 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5658 _("call lacks nop, can't restore toc; "
5659 "recompile with -fPIC"));
5665 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5666 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5667 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5668 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5670 // First instruction of a global dynamic sequence, arg setup insn.
5671 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5672 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5673 enum Got_type got_type
= GOT_TYPE_STANDARD
;
5674 if (tls_type
== tls::TLSOPT_NONE
)
5675 got_type
= GOT_TYPE_TLSGD
;
5676 else if (tls_type
== tls::TLSOPT_TO_IE
)
5677 got_type
= GOT_TYPE_TPREL
;
5678 if (got_type
!= GOT_TYPE_STANDARD
)
5682 gold_assert(gsym
->has_got_offset(got_type
));
5683 value
= gsym
->got_offset(got_type
);
5687 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5688 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
5689 value
= object
->local_got_offset(r_sym
, got_type
);
5691 value
-= target
->got_section()->got_base_offset(object
);
5693 if (tls_type
== tls::TLSOPT_TO_IE
)
5695 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5696 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5698 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5699 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5700 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
5702 insn
|= 32 << 26; // lwz
5704 insn
|= 58 << 26; // ld
5705 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5707 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5708 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5710 else if (tls_type
== tls::TLSOPT_TO_LE
)
5712 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5713 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5715 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5716 Insn insn
= addis_3_13
;
5719 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5720 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5721 value
= psymval
->value(object
, rela
.get_r_addend());
5725 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5727 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5728 r_type
= elfcpp::R_POWERPC_NONE
;
5732 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5733 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5734 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5735 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5737 // First instruction of a local dynamic sequence, arg setup insn.
5738 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5739 if (tls_type
== tls::TLSOPT_NONE
)
5741 value
= target
->tlsld_got_offset();
5742 value
-= target
->got_section()->got_base_offset(object
);
5746 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5747 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5748 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5750 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5751 Insn insn
= addis_3_13
;
5754 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5755 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5760 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5762 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5763 r_type
= elfcpp::R_POWERPC_NONE
;
5767 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
5768 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
5769 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
5770 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
5772 // Accesses relative to a local dynamic sequence address,
5773 // no optimisation here.
5776 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
5777 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
5781 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5782 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
5783 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
5785 value
-= target
->got_section()->got_base_offset(object
);
5787 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5788 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5789 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5790 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5792 // First instruction of initial exec sequence.
5793 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5794 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5795 if (tls_type
== tls::TLSOPT_NONE
)
5799 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
5800 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
5804 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5805 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
5806 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
5808 value
-= target
->got_section()->got_base_offset(object
);
5812 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
5813 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5814 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5816 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5817 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5818 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
5823 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5824 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5825 value
= psymval
->value(object
, rela
.get_r_addend());
5829 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
5831 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5832 r_type
= elfcpp::R_POWERPC_NONE
;
5836 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5837 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5839 // Second instruction of a global dynamic sequence,
5840 // the __tls_get_addr call
5841 this->call_tls_get_addr_
= CALL_EXPECTED
;
5842 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5843 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5844 if (tls_type
!= tls::TLSOPT_NONE
)
5846 if (tls_type
== tls::TLSOPT_TO_IE
)
5848 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5849 Insn insn
= add_3_3_13
;
5852 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5853 r_type
= elfcpp::R_POWERPC_NONE
;
5857 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5858 Insn insn
= addi_3_3
;
5859 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5860 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5861 view
+= 2 * big_endian
;
5862 value
= psymval
->value(object
, rela
.get_r_addend());
5864 this->call_tls_get_addr_
= CALL_SKIP
;
5867 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5868 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5870 // Second instruction of a local dynamic sequence,
5871 // the __tls_get_addr call
5872 this->call_tls_get_addr_
= CALL_EXPECTED
;
5873 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5874 if (tls_type
== tls::TLSOPT_TO_LE
)
5876 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5877 Insn insn
= addi_3_3
;
5878 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5879 this->call_tls_get_addr_
= CALL_SKIP
;
5880 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5881 view
+= 2 * big_endian
;
5885 else if (r_type
== elfcpp::R_POWERPC_TLS
)
5887 // Second instruction of an initial exec sequence
5888 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5889 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5890 if (tls_type
== tls::TLSOPT_TO_LE
)
5892 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
5893 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
5894 unsigned int reg
= size
== 32 ? 2 : 13;
5895 insn
= at_tls_transform(insn
, reg
);
5896 gold_assert(insn
!= 0);
5897 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
5898 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5899 view
+= 2 * big_endian
;
5900 value
= psymval
->value(object
, rela
.get_r_addend());
5903 else if (!has_plt_value
)
5906 unsigned int dest_shndx
;
5907 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
5908 addend
= rela
.get_r_addend();
5909 value
= psymval
->value(object
, addend
);
5910 if (size
== 64 && is_branch_reloc(r_type
))
5911 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
5912 unsigned int max_branch_offset
= 0;
5913 if (r_type
== elfcpp::R_POWERPC_REL24
5914 || r_type
== elfcpp::R_PPC_PLTREL24
5915 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
5916 max_branch_offset
= 1 << 25;
5917 else if (r_type
== elfcpp::R_POWERPC_REL14
5918 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
5919 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
5920 max_branch_offset
= 1 << 15;
5921 if (max_branch_offset
!= 0
5922 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
5924 Stub_table
<size
, big_endian
>* stub_table
5925 = object
->stub_table(relinfo
->data_shndx
);
5926 gold_assert(stub_table
!= NULL
);
5927 Address off
= stub_table
->find_long_branch_entry(object
, value
);
5928 if (off
!= invalid_address
)
5929 value
= stub_table
->stub_address() + stub_table
->plt_size() + off
;
5935 case elfcpp::R_PPC64_REL64
:
5936 case elfcpp::R_POWERPC_REL32
:
5937 case elfcpp::R_POWERPC_REL24
:
5938 case elfcpp::R_PPC_PLTREL24
:
5939 case elfcpp::R_PPC_LOCAL24PC
:
5940 case elfcpp::R_POWERPC_REL16
:
5941 case elfcpp::R_POWERPC_REL16_LO
:
5942 case elfcpp::R_POWERPC_REL16_HI
:
5943 case elfcpp::R_POWERPC_REL16_HA
:
5944 case elfcpp::R_POWERPC_REL14
:
5945 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5946 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5950 case elfcpp::R_PPC64_TOC16
:
5951 case elfcpp::R_PPC64_TOC16_LO
:
5952 case elfcpp::R_PPC64_TOC16_HI
:
5953 case elfcpp::R_PPC64_TOC16_HA
:
5954 case elfcpp::R_PPC64_TOC16_DS
:
5955 case elfcpp::R_PPC64_TOC16_LO_DS
:
5956 // Subtract the TOC base address.
5957 value
-= (target
->got_section()->output_section()->address()
5958 + object
->toc_base_offset());
5961 case elfcpp::R_POWERPC_SECTOFF
:
5962 case elfcpp::R_POWERPC_SECTOFF_LO
:
5963 case elfcpp::R_POWERPC_SECTOFF_HI
:
5964 case elfcpp::R_POWERPC_SECTOFF_HA
:
5965 case elfcpp::R_PPC64_SECTOFF_DS
:
5966 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5968 value
-= os
->address();
5971 case elfcpp::R_PPC64_TPREL16_DS
:
5972 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5974 // R_PPC_TLSGD and R_PPC_TLSLD
5976 case elfcpp::R_POWERPC_TPREL16
:
5977 case elfcpp::R_POWERPC_TPREL16_LO
:
5978 case elfcpp::R_POWERPC_TPREL16_HI
:
5979 case elfcpp::R_POWERPC_TPREL16_HA
:
5980 case elfcpp::R_POWERPC_TPREL
:
5981 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5982 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5983 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5984 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5985 // tls symbol values are relative to tls_segment()->vaddr()
5989 case elfcpp::R_PPC64_DTPREL16_DS
:
5990 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5991 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5992 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5993 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5994 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5996 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
5997 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
5999 case elfcpp::R_POWERPC_DTPREL16
:
6000 case elfcpp::R_POWERPC_DTPREL16_LO
:
6001 case elfcpp::R_POWERPC_DTPREL16_HI
:
6002 case elfcpp::R_POWERPC_DTPREL16_HA
:
6003 case elfcpp::R_POWERPC_DTPREL
:
6004 // tls symbol values are relative to tls_segment()->vaddr()
6005 value
-= dtp_offset
;
6012 Insn branch_bit
= 0;
6015 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6016 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6017 branch_bit
= 1 << 21;
6018 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6019 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6021 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6022 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6025 if (this->is_isa_v2
)
6027 // Set 'a' bit. This is 0b00010 in BO field for branch
6028 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6029 // for branch on CTR insns (BO == 1a00t or 1a01t).
6030 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6032 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6039 // Invert 'y' bit if not the default.
6040 if (static_cast<Signed_address
>(value
) < 0)
6043 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6053 // Multi-instruction sequences that access the TOC can be
6054 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6055 // to nop; addi rb,r2,x;
6061 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6062 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6063 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6064 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6065 case elfcpp::R_POWERPC_GOT16_HA
:
6066 case elfcpp::R_PPC64_TOC16_HA
:
6067 if (!parameters
->options().no_toc_optimize())
6069 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6070 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6071 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6072 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6073 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6074 _("toc optimization is not supported "
6075 "for %#08x instruction"), insn
);
6076 else if (value
+ 0x8000 < 0x10000)
6078 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6084 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6085 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6086 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6087 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6088 case elfcpp::R_POWERPC_GOT16_LO
:
6089 case elfcpp::R_PPC64_GOT16_LO_DS
:
6090 case elfcpp::R_PPC64_TOC16_LO
:
6091 case elfcpp::R_PPC64_TOC16_LO_DS
:
6092 if (!parameters
->options().no_toc_optimize())
6094 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6095 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6096 if (!ok_lo_toc_insn(insn
))
6097 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6098 _("toc optimization is not supported "
6099 "for %#08x instruction"), insn
);
6100 else if (value
+ 0x8000 < 0x10000)
6102 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6104 // Transform addic to addi when we change reg.
6105 insn
&= ~((0x3f << 26) | (0x1f << 16));
6106 insn
|= (14u << 26) | (2 << 16);
6110 insn
&= ~(0x1f << 16);
6113 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6120 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6123 case elfcpp::R_POWERPC_ADDR32
:
6124 case elfcpp::R_POWERPC_UADDR32
:
6126 overflow
= Reloc::CHECK_BITFIELD
;
6129 case elfcpp::R_POWERPC_REL32
:
6131 overflow
= Reloc::CHECK_SIGNED
;
6134 case elfcpp::R_POWERPC_ADDR24
:
6135 case elfcpp::R_POWERPC_ADDR16
:
6136 case elfcpp::R_POWERPC_UADDR16
:
6137 case elfcpp::R_PPC64_ADDR16_DS
:
6138 case elfcpp::R_POWERPC_ADDR14
:
6139 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6140 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6141 overflow
= Reloc::CHECK_BITFIELD
;
6144 case elfcpp::R_POWERPC_REL24
:
6145 case elfcpp::R_PPC_PLTREL24
:
6146 case elfcpp::R_PPC_LOCAL24PC
:
6147 case elfcpp::R_POWERPC_REL16
:
6148 case elfcpp::R_PPC64_TOC16
:
6149 case elfcpp::R_POWERPC_GOT16
:
6150 case elfcpp::R_POWERPC_SECTOFF
:
6151 case elfcpp::R_POWERPC_TPREL16
:
6152 case elfcpp::R_POWERPC_DTPREL16
:
6153 case elfcpp::R_PPC64_TPREL16_DS
:
6154 case elfcpp::R_PPC64_DTPREL16_DS
:
6155 case elfcpp::R_PPC64_TOC16_DS
:
6156 case elfcpp::R_PPC64_GOT16_DS
:
6157 case elfcpp::R_PPC64_SECTOFF_DS
:
6158 case elfcpp::R_POWERPC_REL14
:
6159 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6160 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6161 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6162 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6163 case elfcpp::R_POWERPC_GOT_TPREL16
:
6164 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6165 overflow
= Reloc::CHECK_SIGNED
;
6169 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6170 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6173 case elfcpp::R_POWERPC_NONE
:
6174 case elfcpp::R_POWERPC_TLS
:
6175 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6176 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6177 case elfcpp::R_PPC_EMB_MRKREF
:
6180 case elfcpp::R_PPC64_ADDR64
:
6181 case elfcpp::R_PPC64_REL64
:
6182 case elfcpp::R_PPC64_TOC
:
6183 Reloc::addr64(view
, value
);
6186 case elfcpp::R_POWERPC_TPREL
:
6187 case elfcpp::R_POWERPC_DTPREL
:
6189 Reloc::addr64(view
, value
);
6191 status
= Reloc::addr32(view
, value
, overflow
);
6194 case elfcpp::R_PPC64_UADDR64
:
6195 Reloc::addr64_u(view
, value
);
6198 case elfcpp::R_POWERPC_ADDR32
:
6199 status
= Reloc::addr32(view
, value
, overflow
);
6202 case elfcpp::R_POWERPC_REL32
:
6203 case elfcpp::R_POWERPC_UADDR32
:
6204 status
= Reloc::addr32_u(view
, value
, overflow
);
6207 case elfcpp::R_POWERPC_ADDR24
:
6208 case elfcpp::R_POWERPC_REL24
:
6209 case elfcpp::R_PPC_PLTREL24
:
6210 case elfcpp::R_PPC_LOCAL24PC
:
6211 status
= Reloc::addr24(view
, value
, overflow
);
6214 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6215 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6218 status
= Reloc::addr16_ds(view
, value
, overflow
);
6221 case elfcpp::R_POWERPC_ADDR16
:
6222 case elfcpp::R_POWERPC_REL16
:
6223 case elfcpp::R_PPC64_TOC16
:
6224 case elfcpp::R_POWERPC_GOT16
:
6225 case elfcpp::R_POWERPC_SECTOFF
:
6226 case elfcpp::R_POWERPC_TPREL16
:
6227 case elfcpp::R_POWERPC_DTPREL16
:
6228 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6229 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6230 case elfcpp::R_POWERPC_GOT_TPREL16
:
6231 case elfcpp::R_POWERPC_ADDR16_LO
:
6232 case elfcpp::R_POWERPC_REL16_LO
:
6233 case elfcpp::R_PPC64_TOC16_LO
:
6234 case elfcpp::R_POWERPC_GOT16_LO
:
6235 case elfcpp::R_POWERPC_SECTOFF_LO
:
6236 case elfcpp::R_POWERPC_TPREL16_LO
:
6237 case elfcpp::R_POWERPC_DTPREL16_LO
:
6238 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6239 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6240 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6241 status
= Reloc::addr16(view
, value
, overflow
);
6244 case elfcpp::R_POWERPC_UADDR16
:
6245 status
= Reloc::addr16_u(view
, value
, overflow
);
6248 case elfcpp::R_POWERPC_ADDR16_HI
:
6249 case elfcpp::R_POWERPC_REL16_HI
:
6250 case elfcpp::R_PPC64_TOC16_HI
:
6251 case elfcpp::R_POWERPC_GOT16_HI
:
6252 case elfcpp::R_POWERPC_SECTOFF_HI
:
6253 case elfcpp::R_POWERPC_TPREL16_HI
:
6254 case elfcpp::R_POWERPC_DTPREL16_HI
:
6255 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6256 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6257 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6258 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6259 Reloc::addr16_hi(view
, value
);
6262 case elfcpp::R_POWERPC_ADDR16_HA
:
6263 case elfcpp::R_POWERPC_REL16_HA
:
6264 case elfcpp::R_PPC64_TOC16_HA
:
6265 case elfcpp::R_POWERPC_GOT16_HA
:
6266 case elfcpp::R_POWERPC_SECTOFF_HA
:
6267 case elfcpp::R_POWERPC_TPREL16_HA
:
6268 case elfcpp::R_POWERPC_DTPREL16_HA
:
6269 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6270 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6271 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6272 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6273 Reloc::addr16_ha(view
, value
);
6276 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6278 // R_PPC_EMB_NADDR16_LO
6280 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6281 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6282 Reloc::addr16_hi2(view
, value
);
6285 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6287 // R_PPC_EMB_NADDR16_HI
6289 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6290 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6291 Reloc::addr16_ha2(view
, value
);
6294 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6296 // R_PPC_EMB_NADDR16_HA
6298 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
6299 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6300 Reloc::addr16_hi3(view
, value
);
6303 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6307 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
6308 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6309 Reloc::addr16_ha3(view
, value
);
6312 case elfcpp::R_PPC64_DTPREL16_DS
:
6313 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6315 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6317 case elfcpp::R_PPC64_TPREL16_DS
:
6318 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6320 // R_PPC_TLSGD, R_PPC_TLSLD
6322 case elfcpp::R_PPC64_ADDR16_DS
:
6323 case elfcpp::R_PPC64_ADDR16_LO_DS
:
6324 case elfcpp::R_PPC64_TOC16_DS
:
6325 case elfcpp::R_PPC64_TOC16_LO_DS
:
6326 case elfcpp::R_PPC64_GOT16_DS
:
6327 case elfcpp::R_PPC64_GOT16_LO_DS
:
6328 case elfcpp::R_PPC64_SECTOFF_DS
:
6329 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6330 status
= Reloc::addr16_ds(view
, value
, overflow
);
6333 case elfcpp::R_POWERPC_ADDR14
:
6334 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6335 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6336 case elfcpp::R_POWERPC_REL14
:
6337 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6338 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6339 status
= Reloc::addr14(view
, value
, overflow
);
6342 case elfcpp::R_POWERPC_COPY
:
6343 case elfcpp::R_POWERPC_GLOB_DAT
:
6344 case elfcpp::R_POWERPC_JMP_SLOT
:
6345 case elfcpp::R_POWERPC_RELATIVE
:
6346 case elfcpp::R_POWERPC_DTPMOD
:
6347 case elfcpp::R_PPC64_JMP_IREL
:
6348 case elfcpp::R_POWERPC_IRELATIVE
:
6349 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6350 _("unexpected reloc %u in object file"),
6354 case elfcpp::R_PPC_EMB_SDA21
:
6359 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6363 case elfcpp::R_PPC_EMB_SDA2I16
:
6364 case elfcpp::R_PPC_EMB_SDA2REL
:
6367 // R_PPC64_TLSGD, R_PPC64_TLSLD
6370 case elfcpp::R_POWERPC_PLT32
:
6371 case elfcpp::R_POWERPC_PLTREL32
:
6372 case elfcpp::R_POWERPC_PLT16_LO
:
6373 case elfcpp::R_POWERPC_PLT16_HI
:
6374 case elfcpp::R_POWERPC_PLT16_HA
:
6375 case elfcpp::R_PPC_SDAREL16
:
6376 case elfcpp::R_POWERPC_ADDR30
:
6377 case elfcpp::R_PPC64_PLT64
:
6378 case elfcpp::R_PPC64_PLTREL64
:
6379 case elfcpp::R_PPC64_PLTGOT16
:
6380 case elfcpp::R_PPC64_PLTGOT16_LO
:
6381 case elfcpp::R_PPC64_PLTGOT16_HI
:
6382 case elfcpp::R_PPC64_PLTGOT16_HA
:
6383 case elfcpp::R_PPC64_PLT16_LO_DS
:
6384 case elfcpp::R_PPC64_PLTGOT16_DS
:
6385 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
6386 case elfcpp::R_PPC_EMB_RELSEC16
:
6387 case elfcpp::R_PPC_EMB_RELST_LO
:
6388 case elfcpp::R_PPC_EMB_RELST_HI
:
6389 case elfcpp::R_PPC_EMB_RELST_HA
:
6390 case elfcpp::R_PPC_EMB_BIT_FLD
:
6391 case elfcpp::R_PPC_EMB_RELSDA
:
6392 case elfcpp::R_PPC_TOC16
:
6395 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6396 _("unsupported reloc %u"),
6400 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
6401 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6402 _("relocation overflow"));
6407 // Relocate section data.
6409 template<int size
, bool big_endian
>
6411 Target_powerpc
<size
, big_endian
>::relocate_section(
6412 const Relocate_info
<size
, big_endian
>* relinfo
,
6413 unsigned int sh_type
,
6414 const unsigned char* prelocs
,
6416 Output_section
* output_section
,
6417 bool needs_special_offset_handling
,
6418 unsigned char* view
,
6420 section_size_type view_size
,
6421 const Reloc_symbol_changes
* reloc_symbol_changes
)
6423 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
6424 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
6425 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
6426 Powerpc_comdat_behavior
;
6428 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6430 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
6431 Powerpc_relocate
, Powerpc_comdat_behavior
>(
6437 needs_special_offset_handling
,
6441 reloc_symbol_changes
);
6444 class Powerpc_scan_relocatable_reloc
6447 // Return the strategy to use for a local symbol which is not a
6448 // section symbol, given the relocation type.
6449 inline Relocatable_relocs::Reloc_strategy
6450 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
6452 if (r_type
== 0 && r_sym
== 0)
6453 return Relocatable_relocs::RELOC_DISCARD
;
6454 return Relocatable_relocs::RELOC_COPY
;
6457 // Return the strategy to use for a local symbol which is a section
6458 // symbol, given the relocation type.
6459 inline Relocatable_relocs::Reloc_strategy
6460 local_section_strategy(unsigned int, Relobj
*)
6462 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
6465 // Return the strategy to use for a global symbol, given the
6466 // relocation type, the object, and the symbol index.
6467 inline Relocatable_relocs::Reloc_strategy
6468 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
6470 if (r_type
== elfcpp::R_PPC_PLTREL24
)
6471 return Relocatable_relocs::RELOC_SPECIAL
;
6472 return Relocatable_relocs::RELOC_COPY
;
6476 // Scan the relocs during a relocatable link.
6478 template<int size
, bool big_endian
>
6480 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
6481 Symbol_table
* symtab
,
6483 Sized_relobj_file
<size
, big_endian
>* object
,
6484 unsigned int data_shndx
,
6485 unsigned int sh_type
,
6486 const unsigned char* prelocs
,
6488 Output_section
* output_section
,
6489 bool needs_special_offset_handling
,
6490 size_t local_symbol_count
,
6491 const unsigned char* plocal_symbols
,
6492 Relocatable_relocs
* rr
)
6494 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6496 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
6497 Powerpc_scan_relocatable_reloc
>(
6505 needs_special_offset_handling
,
6511 // Emit relocations for a section.
6512 // This is a modified version of the function by the same name in
6513 // target-reloc.h. Using relocate_special_relocatable for
6514 // R_PPC_PLTREL24 would require duplication of the entire body of the
6515 // loop, so we may as well duplicate the whole thing.
6517 template<int size
, bool big_endian
>
6519 Target_powerpc
<size
, big_endian
>::relocate_relocs(
6520 const Relocate_info
<size
, big_endian
>* relinfo
,
6521 unsigned int sh_type
,
6522 const unsigned char* prelocs
,
6524 Output_section
* output_section
,
6525 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
6526 const Relocatable_relocs
* rr
,
6528 Address view_address
,
6530 unsigned char* reloc_view
,
6531 section_size_type reloc_view_size
)
6533 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6535 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
6537 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
6539 const int reloc_size
6540 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
6542 Powerpc_relobj
<size
, big_endian
>* const object
6543 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6544 const unsigned int local_count
= object
->local_symbol_count();
6545 unsigned int got2_shndx
= object
->got2_shndx();
6546 Address got2_addend
= 0;
6547 if (got2_shndx
!= 0)
6549 got2_addend
= object
->get_output_section_offset(got2_shndx
);
6550 gold_assert(got2_addend
!= invalid_address
);
6553 unsigned char* pwrite
= reloc_view
;
6554 bool zap_next
= false;
6555 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
6557 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
6558 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
6561 Reltype
reloc(prelocs
);
6562 Reltype_write
reloc_write(pwrite
);
6564 Address offset
= reloc
.get_r_offset();
6565 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
6566 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
6567 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
6568 const unsigned int orig_r_sym
= r_sym
;
6569 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
6570 = reloc
.get_r_addend();
6571 const Symbol
* gsym
= NULL
;
6575 // We could arrange to discard these and other relocs for
6576 // tls optimised sequences in the strategy methods, but for
6577 // now do as BFD ld does.
6578 r_type
= elfcpp::R_POWERPC_NONE
;
6582 // Get the new symbol index.
6583 if (r_sym
< local_count
)
6587 case Relocatable_relocs::RELOC_COPY
:
6588 case Relocatable_relocs::RELOC_SPECIAL
:
6591 r_sym
= object
->symtab_index(r_sym
);
6592 gold_assert(r_sym
!= -1U);
6596 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
6598 // We are adjusting a section symbol. We need to find
6599 // the symbol table index of the section symbol for
6600 // the output section corresponding to input section
6601 // in which this symbol is defined.
6602 gold_assert(r_sym
< local_count
);
6604 unsigned int shndx
=
6605 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
6606 gold_assert(is_ordinary
);
6607 Output_section
* os
= object
->output_section(shndx
);
6608 gold_assert(os
!= NULL
);
6609 gold_assert(os
->needs_symtab_index());
6610 r_sym
= os
->symtab_index();
6620 gsym
= object
->global_symbol(r_sym
);
6621 gold_assert(gsym
!= NULL
);
6622 if (gsym
->is_forwarder())
6623 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
6625 gold_assert(gsym
->has_symtab_index());
6626 r_sym
= gsym
->symtab_index();
6629 // Get the new offset--the location in the output section where
6630 // this relocation should be applied.
6631 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6632 offset
+= offset_in_output_section
;
6635 section_offset_type sot_offset
=
6636 convert_types
<section_offset_type
, Address
>(offset
);
6637 section_offset_type new_sot_offset
=
6638 output_section
->output_offset(object
, relinfo
->data_shndx
,
6640 gold_assert(new_sot_offset
!= -1);
6641 offset
= new_sot_offset
;
6644 // In an object file, r_offset is an offset within the section.
6645 // In an executable or dynamic object, generated by
6646 // --emit-relocs, r_offset is an absolute address.
6647 if (!parameters
->options().relocatable())
6649 offset
+= view_address
;
6650 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
6651 offset
-= offset_in_output_section
;
6654 // Handle the reloc addend based on the strategy.
6655 if (strategy
== Relocatable_relocs::RELOC_COPY
)
6657 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
6659 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
6660 addend
= psymval
->value(object
, addend
);
6662 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
6664 if (addend
>= 32768)
6665 addend
+= got2_addend
;
6670 if (!parameters
->options().relocatable())
6672 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6673 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6674 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6675 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6677 // First instruction of a global dynamic sequence,
6679 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6680 switch (this->optimize_tls_gd(final
))
6682 case tls::TLSOPT_TO_IE
:
6683 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6684 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6686 case tls::TLSOPT_TO_LE
:
6687 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6688 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6689 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6692 r_type
= elfcpp::R_POWERPC_NONE
;
6693 offset
-= 2 * big_endian
;
6700 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6701 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6702 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6703 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6705 // First instruction of a local dynamic sequence,
6707 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6709 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6710 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6712 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6713 const Output_section
* os
= relinfo
->layout
->tls_segment()
6715 gold_assert(os
!= NULL
);
6716 gold_assert(os
->needs_symtab_index());
6717 r_sym
= os
->symtab_index();
6718 addend
= dtp_offset
;
6722 r_type
= elfcpp::R_POWERPC_NONE
;
6723 offset
-= 2 * big_endian
;
6727 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6728 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6729 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6730 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6732 // First instruction of initial exec sequence.
6733 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6734 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6736 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6737 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6738 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6741 r_type
= elfcpp::R_POWERPC_NONE
;
6742 offset
-= 2 * big_endian
;
6746 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6747 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6749 // Second instruction of a global dynamic sequence,
6750 // the __tls_get_addr call
6751 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6752 switch (this->optimize_tls_gd(final
))
6754 case tls::TLSOPT_TO_IE
:
6755 r_type
= elfcpp::R_POWERPC_NONE
;
6758 case tls::TLSOPT_TO_LE
:
6759 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6760 offset
+= 2 * big_endian
;
6767 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6768 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6770 // Second instruction of a local dynamic sequence,
6771 // the __tls_get_addr call
6772 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
6774 const Output_section
* os
= relinfo
->layout
->tls_segment()
6776 gold_assert(os
!= NULL
);
6777 gold_assert(os
->needs_symtab_index());
6778 r_sym
= os
->symtab_index();
6779 addend
= dtp_offset
;
6780 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6781 offset
+= 2 * big_endian
;
6785 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6787 // Second instruction of an initial exec sequence
6788 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6789 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
6791 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6792 offset
+= 2 * big_endian
;
6797 reloc_write
.put_r_offset(offset
);
6798 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
6799 reloc_write
.put_r_addend(addend
);
6801 pwrite
+= reloc_size
;
6804 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
6805 == reloc_view_size
);
6808 // Return the value to use for a dynamic symbol which requires special
6809 // treatment. This is how we support equality comparisons of function
6810 // pointers across shared library boundaries, as described in the
6811 // processor specific ABI supplement.
6813 template<int size
, bool big_endian
>
6815 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
6819 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
6820 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6821 p
!= this->stub_tables_
.end();
6824 Address off
= (*p
)->find_plt_call_entry(gsym
);
6825 if (off
!= invalid_address
)
6826 return (*p
)->stub_address() + off
;
6832 // Return the PLT address to use for a local symbol.
6833 template<int size
, bool big_endian
>
6835 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
6836 const Relobj
* object
,
6837 unsigned int symndx
) const
6841 const Sized_relobj
<size
, big_endian
>* relobj
6842 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
6843 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6844 p
!= this->stub_tables_
.end();
6847 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
6849 if (off
!= invalid_address
)
6850 return (*p
)->stub_address() + off
;
6856 // Return the PLT address to use for a global symbol.
6857 template<int size
, bool big_endian
>
6859 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
6860 const Symbol
* gsym
) const
6864 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
6865 p
!= this->stub_tables_
.end();
6868 Address off
= (*p
)->find_plt_call_entry(gsym
);
6869 if (off
!= invalid_address
)
6870 return (*p
)->stub_address() + off
;
6876 // Return the offset to use for the GOT_INDX'th got entry which is
6877 // for a local tls symbol specified by OBJECT, SYMNDX.
6878 template<int size
, bool big_endian
>
6880 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
6881 const Relobj
* object
,
6882 unsigned int symndx
,
6883 unsigned int got_indx
) const
6885 const Powerpc_relobj
<size
, big_endian
>* ppc_object
6886 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
6887 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
6889 for (Got_type got_type
= GOT_TYPE_TLSGD
;
6890 got_type
<= GOT_TYPE_TPREL
;
6891 got_type
= Got_type(got_type
+ 1))
6892 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
6894 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
6895 if (got_type
== GOT_TYPE_TLSGD
)
6897 if (off
== got_indx
* (size
/ 8))
6899 if (got_type
== GOT_TYPE_TPREL
)
6909 // Return the offset to use for the GOT_INDX'th got entry which is
6910 // for global tls symbol GSYM.
6911 template<int size
, bool big_endian
>
6913 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
6915 unsigned int got_indx
) const
6917 if (gsym
->type() == elfcpp::STT_TLS
)
6919 for (Got_type got_type
= GOT_TYPE_TLSGD
;
6920 got_type
<= GOT_TYPE_TPREL
;
6921 got_type
= Got_type(got_type
+ 1))
6922 if (gsym
->has_got_offset(got_type
))
6924 unsigned int off
= gsym
->got_offset(got_type
);
6925 if (got_type
== GOT_TYPE_TLSGD
)
6927 if (off
== got_indx
* (size
/ 8))
6929 if (got_type
== GOT_TYPE_TPREL
)
6939 // The selector for powerpc object files.
6941 template<int size
, bool big_endian
>
6942 class Target_selector_powerpc
: public Target_selector
6945 Target_selector_powerpc()
6946 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
6948 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
6949 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
6951 ? (big_endian
? "elf64ppc" : "elf64lppc")
6952 : (big_endian
? "elf32ppc" : "elf32lppc")))
6956 do_recognize(Input_file
*, off_t
, int machine
, int, int)
6961 if (machine
!= elfcpp::EM_PPC64
)
6966 if (machine
!= elfcpp::EM_PPC
)
6974 return this->instantiate_target();
6978 do_instantiate_target()
6979 { return new Target_powerpc
<size
, big_endian
>(); }
6982 Target_selector_powerpc
<32, true> target_selector_ppc32
;
6983 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
6984 Target_selector_powerpc
<64, true> target_selector_ppc64
;
6985 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
6987 } // End anonymous namespace.