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.
27 #include "parameters.h"
34 #include "copy-relocs.h"
36 #include "target-reloc.h"
37 #include "target-select.h"
47 template<int size
, bool big_endian
>
48 class Output_data_plt_powerpc
;
50 template<int size
, bool big_endian
>
51 class Output_data_got_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_glink
;
56 template<int size
, bool big_endian
>
57 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
60 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
61 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
62 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
64 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
65 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
66 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
67 special_(0), opd_valid_(false), opd_ent_(), access_from_map_()
73 // The .got2 section shndx.
78 return this->special_
;
83 // The .opd section shndx.
90 return this->special_
;
93 // Init OPD entry arrays.
95 init_opd(size_t opd_size
)
97 size_t count
= this->opd_ent_ndx(opd_size
);
98 this->opd_ent_
.resize(count
);
101 // Return section and offset of function entry for .opd + R_OFF.
103 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
105 size_t ndx
= this->opd_ent_ndx(r_off
);
106 gold_assert(ndx
< this->opd_ent_
.size());
107 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
109 *value
= this->opd_ent_
[ndx
].off
;
110 return this->opd_ent_
[ndx
].shndx
;
113 // Set section and offset of function entry for .opd + R_OFF.
115 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
117 size_t ndx
= this->opd_ent_ndx(r_off
);
118 gold_assert(ndx
< this->opd_ent_
.size());
119 this->opd_ent_
[ndx
].shndx
= shndx
;
120 this->opd_ent_
[ndx
].off
= value
;
123 // Return discard flag for .opd + R_OFF.
125 get_opd_discard(Address r_off
) const
127 size_t ndx
= this->opd_ent_ndx(r_off
);
128 gold_assert(ndx
< this->opd_ent_
.size());
129 return this->opd_ent_
[ndx
].discard
;
132 // Set discard flag for .opd + R_OFF.
134 set_opd_discard(Address r_off
)
136 size_t ndx
= this->opd_ent_ndx(r_off
);
137 gold_assert(ndx
< this->opd_ent_
.size());
138 this->opd_ent_
[ndx
].discard
= true;
143 { return &this->access_from_map_
; }
145 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
146 // section at DST_OFF.
148 add_reference(Object
* src_obj
,
149 unsigned int src_indx
,
150 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
152 Section_id
src_id(src_obj
, src_indx
);
153 this->access_from_map_
[dst_off
].insert(src_id
);
156 // Add a reference to the code section specified by the .opd entry
159 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
161 size_t ndx
= this->opd_ent_ndx(dst_off
);
162 if (ndx
>= this->opd_ent_
.size())
163 this->opd_ent_
.resize(ndx
+ 1);
164 this->opd_ent_
[ndx
].gc_mark
= true;
168 process_gc_mark(Symbol_table
* symtab
)
170 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
171 if (this->opd_ent_
[i
].gc_mark
)
173 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
174 symtab
->gc()->worklist().push(Section_id(this, shndx
));
180 { return this->opd_valid_
; }
184 { this->opd_valid_
= true; }
186 // Examine .rela.opd to build info about function entry points.
188 scan_opd_relocs(size_t reloc_count
,
189 const unsigned char* prelocs
,
190 const unsigned char* plocal_syms
);
192 // Perform the Sized_relobj_file method, then set up opd info from
195 do_read_relocs(Read_relocs_data
*);
197 // Set up some symbols, then perform Sized_relobj_file method.
198 // Occurs after garbage collection, which is why opd info can't be
201 do_scan_relocs(Symbol_table
*, Layout
*, Read_relocs_data
*);
204 do_find_special_sections(Read_symbols_data
* sd
);
206 // Adjust this local symbol value. Return false if the symbol
207 // should be discarded from the output file.
209 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
211 if (size
== 64 && this->opd_shndx() != 0)
214 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
216 if (this->get_opd_discard(lv
->input_value()))
222 // Return offset in output GOT section that this object will use
223 // as a TOC pointer. Won't be just a constant with multi-toc support.
225 toc_base_offset() const
237 // Return index into opd_ent_ array for .opd entry at OFF.
238 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
239 // apart when the language doesn't use the last 8-byte word, the
240 // environment pointer. Thus dividing the entry section offset by
241 // 16 will give an index into opd_ent_ that works for either layout
242 // of .opd. (It leaves some elements of the vector unused when .opd
243 // entries are spaced 24 bytes apart, but we don't know the spacing
244 // until relocations are processed, and in any case it is possible
245 // for an object to have some entries spaced 16 bytes apart and
246 // others 24 bytes apart.)
248 opd_ent_ndx(size_t off
) const
251 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
252 unsigned int special_
;
254 // Set at the start of gc_process_relocs, when we know opd_ent_
255 // vector is valid. The flag could be made atomic and set in
256 // do_read_relocs with memory_order_release and then tested with
257 // memory_order_acquire, potentially resulting in fewer entries in
261 // The first 8-byte word of an OPD entry gives the address of the
262 // entry point of the function. Relocatable object files have a
263 // relocation on this word. The following vector records the
264 // section and offset specified by these relocations.
265 std::vector
<Opd_ent
> opd_ent_
;
267 // References made to this object's .opd section when running
268 // gc_process_relocs for another object, before the opd_ent_ vector
269 // is valid for this object.
270 Access_from access_from_map_
;
273 template<int size
, bool big_endian
>
274 class Target_powerpc
: public Sized_target
<size
, big_endian
>
278 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
279 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
280 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
281 static const Address invalid_address
= static_cast<Address
>(0) - 1;
282 // Offset of tp and dtp pointers from start of TLS block.
283 static const Address tp_offset
= 0x7000;
284 static const Address dtp_offset
= 0x8000;
287 : Sized_target
<size
, big_endian
>(&powerpc_info
),
288 got_(NULL
), plt_(NULL
), iplt_(NULL
), glink_(NULL
), rela_dyn_(NULL
),
289 copy_relocs_(elfcpp::R_POWERPC_COPY
),
290 dynbss_(NULL
), tlsld_got_offset_(-1U)
294 // Process the relocations to determine unreferenced sections for
295 // garbage collection.
297 gc_process_relocs(Symbol_table
* symtab
,
299 Sized_relobj_file
<size
, big_endian
>* object
,
300 unsigned int data_shndx
,
301 unsigned int sh_type
,
302 const unsigned char* prelocs
,
304 Output_section
* output_section
,
305 bool needs_special_offset_handling
,
306 size_t local_symbol_count
,
307 const unsigned char* plocal_symbols
);
309 // Scan the relocations to look for symbol adjustments.
311 scan_relocs(Symbol_table
* symtab
,
313 Sized_relobj_file
<size
, big_endian
>* object
,
314 unsigned int data_shndx
,
315 unsigned int sh_type
,
316 const unsigned char* prelocs
,
318 Output_section
* output_section
,
319 bool needs_special_offset_handling
,
320 size_t local_symbol_count
,
321 const unsigned char* plocal_symbols
);
323 // Map input .toc section to output .got section.
325 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
327 if (size
== 64 && strcmp(name
, ".toc") == 0)
335 // Provide linker defined save/restore functions.
337 define_save_restore_funcs(Layout
*, Symbol_table
*);
339 // Finalize the sections.
341 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
343 // Return the value to use for a dynamic which requires special
346 do_dynsym_value(const Symbol
*) const;
348 // Return the PLT address to use for a local symbol.
350 do_plt_address_for_local(const Relobj
*, unsigned int) const;
352 // Return the PLT address to use for a global symbol.
354 do_plt_address_for_global(const Symbol
*) const;
356 // Return the offset to use for the GOT_INDX'th got entry which is
357 // for a local tls symbol specified by OBJECT, SYMNDX.
359 do_tls_offset_for_local(const Relobj
* object
,
361 unsigned int got_indx
) const;
363 // Return the offset to use for the GOT_INDX'th got entry which is
364 // for global tls symbol GSYM.
366 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
368 // Relocate a section.
370 relocate_section(const Relocate_info
<size
, big_endian
>*,
371 unsigned int sh_type
,
372 const unsigned char* prelocs
,
374 Output_section
* output_section
,
375 bool needs_special_offset_handling
,
377 Address view_address
,
378 section_size_type view_size
,
379 const Reloc_symbol_changes
*);
381 // Scan the relocs during a relocatable link.
383 scan_relocatable_relocs(Symbol_table
* symtab
,
385 Sized_relobj_file
<size
, big_endian
>* object
,
386 unsigned int data_shndx
,
387 unsigned int sh_type
,
388 const unsigned char* prelocs
,
390 Output_section
* output_section
,
391 bool needs_special_offset_handling
,
392 size_t local_symbol_count
,
393 const unsigned char* plocal_symbols
,
394 Relocatable_relocs
*);
396 // Emit relocations for a section.
398 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
399 unsigned int sh_type
,
400 const unsigned char* prelocs
,
402 Output_section
* output_section
,
403 typename
elfcpp::Elf_types
<size
>::Elf_Off
404 offset_in_output_section
,
405 const Relocatable_relocs
*,
407 Address view_address
,
409 unsigned char* reloc_view
,
410 section_size_type reloc_view_size
);
412 // Return whether SYM is defined by the ABI.
414 do_is_defined_by_abi(const Symbol
* sym
) const
416 return strcmp(sym
->name(), "__tls_get_addr") == 0;
419 // Return the size of the GOT section.
423 gold_assert(this->got_
!= NULL
);
424 return this->got_
->data_size();
427 // Get the PLT section.
428 const Output_data_plt_powerpc
<size
, big_endian
>*
431 gold_assert(this->plt_
!= NULL
);
435 // Get the IPLT section.
436 const Output_data_plt_powerpc
<size
, big_endian
>*
439 gold_assert(this->iplt_
!= NULL
);
443 // Get the .glink section.
444 const Output_data_glink
<size
, big_endian
>*
445 glink_section() const
447 gold_assert(this->glink_
!= NULL
);
451 // Get the GOT section.
452 const Output_data_got_powerpc
<size
, big_endian
>*
455 gold_assert(this->got_
!= NULL
);
459 // Get the GOT section, creating it if necessary.
460 Output_data_got_powerpc
<size
, big_endian
>*
461 got_section(Symbol_table
*, Layout
*);
464 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
465 const elfcpp::Ehdr
<size
, big_endian
>&);
467 // Return the number of entries in the GOT.
469 got_entry_count() const
471 if (this->got_
== NULL
)
473 return this->got_size() / (size
/ 8);
476 // Return the number of entries in the PLT.
478 plt_entry_count() const;
480 // Return the offset of the first non-reserved PLT entry.
482 first_plt_entry_offset() const;
484 // Return the size of each PLT entry.
486 plt_entry_size() const;
488 // Add any special sections for this symbol to the gc work list.
489 // For powerpc64, this adds the code section of a function
492 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
494 // Handle target specific gc actions when adding a gc reference from
495 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
496 // and DST_OFF. For powerpc64, this adds a referenc to the code
497 // section of a function descriptor.
499 do_gc_add_reference(Symbol_table
* symtab
,
501 unsigned int src_shndx
,
503 unsigned int dst_shndx
,
504 Address dst_off
) const;
508 // The class which scans relocations.
512 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
515 : issued_non_pic_error_(false)
519 get_reference_flags(unsigned int r_type
);
522 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
523 Sized_relobj_file
<size
, big_endian
>* object
,
524 unsigned int data_shndx
,
525 Output_section
* output_section
,
526 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
527 const elfcpp::Sym
<size
, big_endian
>& lsym
,
531 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
532 Sized_relobj_file
<size
, big_endian
>* object
,
533 unsigned int data_shndx
,
534 Output_section
* output_section
,
535 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
539 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
541 Sized_relobj_file
<size
, big_endian
>* ,
544 const elfcpp::Rela
<size
, big_endian
>& ,
546 const elfcpp::Sym
<size
, big_endian
>&)
550 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
552 Sized_relobj_file
<size
, big_endian
>* ,
555 const elfcpp::Rela
<size
,
557 unsigned int , Symbol
*)
562 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
563 unsigned int r_type
);
566 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
567 unsigned int r_type
, Symbol
*);
570 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
571 Target_powerpc
* target
);
574 check_non_pic(Relobj
*, unsigned int r_type
);
577 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
578 unsigned int r_type
);
580 // Whether we have issued an error about a non-PIC compilation.
581 bool issued_non_pic_error_
;
585 symval_for_branch(Address value
, const Sized_symbol
<size
>* gsym
,
586 Powerpc_relobj
<size
, big_endian
>* object
,
587 unsigned int *dest_shndx
);
589 // The class which implements relocation.
593 // Use 'at' branch hints when true, 'y' when false.
594 // FIXME maybe: set this with an option.
595 static const bool is_isa_v2
= true;
599 CALL_NOT_EXPECTED
= 0,
605 : call_tls_get_addr_(CALL_NOT_EXPECTED
)
610 if (this->call_tls_get_addr_
!= CALL_NOT_EXPECTED
)
612 // FIXME: This needs to specify the location somehow.
613 gold_error(_("missing expected __tls_get_addr call"));
617 // Do a relocation. Return false if the caller should not issue
618 // any warnings about this relocation.
620 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
621 Output_section
*, size_t relnum
,
622 const elfcpp::Rela
<size
, big_endian
>&,
623 unsigned int r_type
, const Sized_symbol
<size
>*,
624 const Symbol_value
<size
>*,
626 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
629 // This is set if we should skip the next reloc, which should be a
630 // call to __tls_get_addr.
631 enum skip_tls call_tls_get_addr_
;
634 class Relocate_comdat_behavior
637 // Decide what the linker should do for relocations that refer to
638 // discarded comdat sections.
639 inline Comdat_behavior
640 get(const char* name
)
642 gold::Default_comdat_behavior default_behavior
;
643 Comdat_behavior ret
= default_behavior
.get(name
);
644 if (ret
== CB_WARNING
)
647 && (strcmp(name
, ".fixup") == 0
648 || strcmp(name
, ".got2") == 0))
651 && (strcmp(name
, ".opd") == 0
652 || strcmp(name
, ".toc") == 0
653 || strcmp(name
, ".toc1") == 0))
660 // A class which returns the size required for a relocation type,
661 // used while scanning relocs during a relocatable link.
662 class Relocatable_size_for_reloc
666 get_size_for_reloc(unsigned int, Relobj
*)
673 // Optimize the TLS relocation type based on what we know about the
674 // symbol. IS_FINAL is true if the final address of this symbol is
675 // known at link time.
677 tls::Tls_optimization
678 optimize_tls_gd(bool is_final
)
680 // If we are generating a shared library, then we can't do anything
682 if (parameters
->options().shared())
683 return tls::TLSOPT_NONE
;
686 return tls::TLSOPT_TO_IE
;
687 return tls::TLSOPT_TO_LE
;
690 tls::Tls_optimization
693 if (parameters
->options().shared())
694 return tls::TLSOPT_NONE
;
696 return tls::TLSOPT_TO_LE
;
699 tls::Tls_optimization
700 optimize_tls_ie(bool is_final
)
702 if (!is_final
|| parameters
->options().shared())
703 return tls::TLSOPT_NONE
;
705 return tls::TLSOPT_TO_LE
;
710 make_glink_section(Layout
*);
712 // Create the PLT section.
714 make_plt_section(Layout
*);
717 make_iplt_section(Layout
*);
719 // Create a PLT entry for a global symbol.
721 make_plt_entry(Layout
*, Symbol
*,
722 const elfcpp::Rela
<size
, big_endian
>&,
723 const Sized_relobj_file
<size
, big_endian
>* object
);
725 // Create a PLT entry for a local IFUNC symbol.
727 make_local_ifunc_plt_entry(Layout
*,
728 const elfcpp::Rela
<size
, big_endian
>&,
729 Sized_relobj_file
<size
, big_endian
>*);
731 // Create a GOT entry for local dynamic __tls_get_addr.
733 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
734 Sized_relobj_file
<size
, big_endian
>* object
);
737 tlsld_got_offset() const
739 return this->tlsld_got_offset_
;
742 // Get the dynamic reloc section, creating it if necessary.
744 rela_dyn_section(Layout
*);
746 // Copy a relocation against a global symbol.
748 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
749 Sized_relobj_file
<size
, big_endian
>* object
,
750 unsigned int shndx
, Output_section
* output_section
,
751 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
753 this->copy_relocs_
.copy_reloc(symtab
, layout
,
754 symtab
->get_sized_symbol
<size
>(sym
),
755 object
, shndx
, output_section
,
756 reloc
, this->rela_dyn_section(layout
));
759 // Information about this specific target which we pass to the
760 // general Target structure.
761 static Target::Target_info powerpc_info
;
763 // The types of GOT entries needed for this platform.
764 // These values are exposed to the ABI in an incremental link.
765 // Do not renumber existing values without changing the version
766 // number of the .gnu_incremental_inputs section.
770 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
771 GOT_TYPE_DTPREL
, // entry for @got@dtprel
772 GOT_TYPE_TPREL
// entry for @got@tprel
775 // The GOT output section.
776 Output_data_got_powerpc
<size
, big_endian
>* got_
;
777 // The PLT output section.
778 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
779 // The IPLT output section.
780 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
781 // The .glink output section.
782 Output_data_glink
<size
, big_endian
>* glink_
;
783 // The dynamic reloc output section.
784 Reloc_section
* rela_dyn_
;
785 // Relocs saved to avoid a COPY reloc.
786 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
787 // Space for variables copied with a COPY reloc.
788 Output_data_space
* dynbss_
;
789 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
790 unsigned int tlsld_got_offset_
;
794 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
797 true, // is_big_endian
798 elfcpp::EM_PPC
, // machine_code
799 false, // has_make_symbol
800 false, // has_resolve
801 false, // has_code_fill
802 true, // is_default_stack_executable
803 false, // can_icf_inline_merge_sections
805 "/usr/lib/ld.so.1", // dynamic_linker
806 0x10000000, // default_text_segment_address
807 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
808 4 * 1024, // common_pagesize (overridable by -z common-page-size)
809 false, // isolate_execinstr
811 elfcpp::SHN_UNDEF
, // small_common_shndx
812 elfcpp::SHN_UNDEF
, // large_common_shndx
813 0, // small_common_section_flags
814 0, // large_common_section_flags
815 NULL
, // attributes_section
816 NULL
// attributes_vendor
820 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
823 false, // is_big_endian
824 elfcpp::EM_PPC
, // machine_code
825 false, // has_make_symbol
826 false, // has_resolve
827 false, // has_code_fill
828 true, // is_default_stack_executable
829 false, // can_icf_inline_merge_sections
831 "/usr/lib/ld.so.1", // dynamic_linker
832 0x10000000, // default_text_segment_address
833 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
834 4 * 1024, // common_pagesize (overridable by -z common-page-size)
835 false, // isolate_execinstr
837 elfcpp::SHN_UNDEF
, // small_common_shndx
838 elfcpp::SHN_UNDEF
, // large_common_shndx
839 0, // small_common_section_flags
840 0, // large_common_section_flags
841 NULL
, // attributes_section
842 NULL
// attributes_vendor
846 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
849 true, // is_big_endian
850 elfcpp::EM_PPC64
, // machine_code
851 false, // has_make_symbol
852 false, // has_resolve
853 false, // has_code_fill
854 true, // is_default_stack_executable
855 false, // can_icf_inline_merge_sections
857 "/usr/lib/ld.so.1", // dynamic_linker
858 0x10000000, // default_text_segment_address
859 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
860 4 * 1024, // common_pagesize (overridable by -z common-page-size)
861 false, // isolate_execinstr
863 elfcpp::SHN_UNDEF
, // small_common_shndx
864 elfcpp::SHN_UNDEF
, // large_common_shndx
865 0, // small_common_section_flags
866 0, // large_common_section_flags
867 NULL
, // attributes_section
868 NULL
// attributes_vendor
872 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
875 false, // is_big_endian
876 elfcpp::EM_PPC64
, // machine_code
877 false, // has_make_symbol
878 false, // has_resolve
879 false, // has_code_fill
880 true, // is_default_stack_executable
881 false, // can_icf_inline_merge_sections
883 "/usr/lib/ld.so.1", // dynamic_linker
884 0x10000000, // default_text_segment_address
885 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
886 4 * 1024, // common_pagesize (overridable by -z common-page-size)
887 false, // isolate_execinstr
889 elfcpp::SHN_UNDEF
, // small_common_shndx
890 elfcpp::SHN_UNDEF
, // large_common_shndx
891 0, // small_common_section_flags
892 0, // large_common_section_flags
893 NULL
, // attributes_section
894 NULL
// attributes_vendor
898 is_branch_reloc(unsigned int r_type
)
900 return (r_type
== elfcpp::R_POWERPC_REL24
901 || r_type
== elfcpp::R_PPC_PLTREL24
902 || r_type
== elfcpp::R_PPC_LOCAL24PC
903 || r_type
== elfcpp::R_POWERPC_REL14
904 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
905 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
906 || r_type
== elfcpp::R_POWERPC_ADDR24
907 || r_type
== elfcpp::R_POWERPC_ADDR14
908 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
909 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
912 // If INSN is an opcode that may be used with an @tls operand, return
913 // the transformed insn for TLS optimisation, otherwise return 0. If
914 // REG is non-zero only match an insn with RB or RA equal to REG.
916 at_tls_transform(uint32_t insn
, unsigned int reg
)
918 if ((insn
& (0x3f << 26)) != 31 << 26)
922 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
923 rtra
= insn
& ((1 << 26) - (1 << 16));
924 else if (((insn
>> 16) & 0x1f) == reg
)
925 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
929 if ((insn
& (0x3ff << 1)) == 266 << 1)
932 else if ((insn
& (0x1f << 1)) == 23 << 1
933 && ((insn
& (0x1f << 6)) < 14 << 6
934 || ((insn
& (0x1f << 6)) >= 16 << 6
935 && (insn
& (0x1f << 6)) < 24 << 6)))
936 // load and store indexed -> dform
937 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
938 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
939 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
940 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
941 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
943 insn
= (58 << 26) | 2;
950 // Modified version of symtab.h class Symbol member
951 // Given a direct absolute or pc-relative static relocation against
952 // the global symbol, this function returns whether a dynamic relocation
957 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
959 // No dynamic relocations in a static link!
960 if (parameters
->doing_static_link())
963 // A reference to an undefined symbol from an executable should be
964 // statically resolved to 0, and does not need a dynamic relocation.
965 // This matches gnu ld behavior.
966 if (gsym
->is_undefined() && !parameters
->options().shared())
969 // A reference to an absolute symbol does not need a dynamic relocation.
970 if (gsym
->is_absolute())
973 // An absolute reference within a position-independent output file
974 // will need a dynamic relocation.
975 if ((flags
& Symbol::ABSOLUTE_REF
)
976 && parameters
->options().output_is_position_independent())
979 // A function call that can branch to a local PLT entry does not need
980 // a dynamic relocation.
981 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
984 // A reference to any PLT entry in a non-position-independent executable
985 // does not need a dynamic relocation.
986 // Except due to having function descriptors on powerpc64 we don't define
987 // functions to their plt code in an executable, so this doesn't apply.
989 && !parameters
->options().output_is_position_independent()
990 && gsym
->has_plt_offset())
993 // A reference to a symbol defined in a dynamic object or to a
994 // symbol that is preemptible will need a dynamic relocation.
995 if (gsym
->is_from_dynobj()
996 || gsym
->is_undefined()
997 || gsym
->is_preemptible())
1000 // For all other cases, return FALSE.
1004 // Modified version of symtab.h class Symbol member
1005 // Whether we should use the PLT offset associated with a symbol for
1006 // a relocation. FLAGS is a set of Reference_flags.
1010 use_plt_offset(const Symbol
* gsym
, int flags
)
1012 // If the symbol doesn't have a PLT offset, then naturally we
1013 // don't want to use it.
1014 if (!gsym
->has_plt_offset())
1017 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1018 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1021 // If we are going to generate a dynamic relocation, then we will
1022 // wind up using that, so no need to use the PLT entry.
1023 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1026 // If the symbol is from a dynamic object, we need to use the PLT
1028 if (gsym
->is_from_dynobj())
1031 // If we are generating a shared object, and gsym symbol is
1032 // undefined or preemptible, we need to use the PLT entry.
1033 if (parameters
->options().shared()
1034 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1037 // If gsym is a call to a weak undefined symbol, we need to use
1038 // the PLT entry; the symbol may be defined by a library loaded
1040 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1043 // Otherwise we can use the regular definition.
1047 template<int size
, bool big_endian
>
1048 class Powerpc_relocate_functions
1065 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1066 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1068 template<int valsize
>
1070 has_overflow_signed(Address value
)
1072 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1073 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1074 limit
<<= ((valsize
- 1) >> 1);
1075 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1076 return value
+ limit
> (limit
<< 1) - 1;
1079 template<int valsize
>
1081 has_overflow_bitfield(Address value
)
1083 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1084 limit
<<= ((valsize
- 1) >> 1);
1085 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1086 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1089 template<int valsize
>
1090 static inline Status
1091 overflowed(Address value
, Overflow_check overflow
)
1093 if (overflow
== CHECK_SIGNED
)
1095 if (has_overflow_signed
<valsize
>(value
))
1096 return STATUS_OVERFLOW
;
1098 else if (overflow
== CHECK_BITFIELD
)
1100 if (has_overflow_bitfield
<valsize
>(value
))
1101 return STATUS_OVERFLOW
;
1106 // Do a simple RELA relocation
1107 template<int valsize
>
1108 static inline Status
1109 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1111 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1112 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1113 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1114 return overflowed
<valsize
>(value
, overflow
);
1117 template<int valsize
>
1118 static inline Status
1119 rela(unsigned char* view
,
1120 unsigned int right_shift
,
1121 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1123 Overflow_check overflow
)
1125 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1126 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1127 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1128 Valtype reloc
= value
>> right_shift
;
1131 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1132 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1135 // Do a simple RELA relocation, unaligned.
1136 template<int valsize
>
1137 static inline Status
1138 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1140 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1141 return overflowed
<valsize
>(value
, overflow
);
1144 template<int valsize
>
1145 static inline Status
1146 rela_ua(unsigned char* view
,
1147 unsigned int right_shift
,
1148 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1150 Overflow_check overflow
)
1152 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1154 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1155 Valtype reloc
= value
>> right_shift
;
1158 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1159 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1163 // R_PPC64_ADDR64: (Symbol + Addend)
1165 addr64(unsigned char* view
, Address value
)
1166 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1168 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1170 addr64_u(unsigned char* view
, Address value
)
1171 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1173 // R_POWERPC_ADDR32: (Symbol + Addend)
1174 static inline Status
1175 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1176 { return This::template rela
<32>(view
, value
, overflow
); }
1178 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1179 static inline Status
1180 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1181 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1183 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1184 static inline Status
1185 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1187 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1188 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1189 stat
= STATUS_OVERFLOW
;
1193 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1194 static inline Status
1195 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1196 { return This::template rela
<16>(view
, value
, overflow
); }
1198 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1199 static inline Status
1200 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1201 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1203 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1204 static inline Status
1205 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1207 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1208 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1209 stat
= STATUS_OVERFLOW
;
1213 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1215 addr16_hi(unsigned char* view
, Address value
)
1216 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1218 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1220 addr16_ha(unsigned char* view
, Address value
)
1221 { This::addr16_hi(view
, value
+ 0x8000); }
1223 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1225 addr16_hi2(unsigned char* view
, Address value
)
1226 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1228 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1230 addr16_ha2(unsigned char* view
, Address value
)
1231 { This::addr16_hi2(view
, value
+ 0x8000); }
1233 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1235 addr16_hi3(unsigned char* view
, Address value
)
1236 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1238 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1240 addr16_ha3(unsigned char* view
, Address value
)
1241 { This::addr16_hi3(view
, value
+ 0x8000); }
1243 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1244 static inline Status
1245 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1247 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1248 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1249 stat
= STATUS_OVERFLOW
;
1254 // Stash away the index of .got2 or .opd in a relocatable object, if
1255 // such a section exists.
1257 template<int size
, bool big_endian
>
1259 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1260 Read_symbols_data
* sd
)
1262 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1263 const unsigned char* namesu
= sd
->section_names
->data();
1264 const char* names
= reinterpret_cast<const char*>(namesu
);
1265 section_size_type names_size
= sd
->section_names_size
;
1266 const unsigned char* s
;
1268 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1269 names
, names_size
, NULL
);
1272 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1273 this->special_
= ndx
;
1275 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1278 // Examine .rela.opd to build info about function entry points.
1280 template<int size
, bool big_endian
>
1282 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1284 const unsigned char* prelocs
,
1285 const unsigned char* plocal_syms
)
1289 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1291 const int reloc_size
1292 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1293 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1294 Address expected_off
= 0;
1295 bool regular
= true;
1296 unsigned int opd_ent_size
= 0;
1298 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1300 Reltype
reloc(prelocs
);
1301 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1302 = reloc
.get_r_info();
1303 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1304 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1306 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1307 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1310 if (r_sym
< this->local_symbol_count())
1312 typename
elfcpp::Sym
<size
, big_endian
>
1313 lsym(plocal_syms
+ r_sym
* sym_size
);
1314 shndx
= lsym
.get_st_shndx();
1315 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1316 value
= lsym
.get_st_value();
1319 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1321 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1322 value
+ reloc
.get_r_addend());
1325 expected_off
= reloc
.get_r_offset();
1326 opd_ent_size
= expected_off
;
1328 else if (expected_off
!= reloc
.get_r_offset())
1330 expected_off
+= opd_ent_size
;
1332 else if (r_type
== elfcpp::R_PPC64_TOC
)
1334 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1339 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1340 this->name().c_str(), r_type
);
1344 if (reloc_count
<= 2)
1345 opd_ent_size
= this->section_size(this->opd_shndx());
1346 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1350 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1351 this->name().c_str());
1357 template<int size
, bool big_endian
>
1359 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1361 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1364 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1365 p
!= rd
->relocs
.end();
1368 if (p
->data_shndx
== this->opd_shndx())
1370 uint64_t opd_size
= this->section_size(this->opd_shndx());
1371 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1374 this->init_opd(opd_size
);
1375 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1376 rd
->local_symbols
->data());
1384 // Set up some symbols, then perform Sized_relobj_file method.
1386 template<int size
, bool big_endian
>
1388 Powerpc_relobj
<size
, big_endian
>::do_scan_relocs(Symbol_table
* symtab
,
1390 Read_relocs_data
* rd
)
1394 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1395 // undefined when scanning relocs (and thus requires
1396 // non-relative dynamic relocs). The proper value will be
1398 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1399 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1401 Target_powerpc
<size
, big_endian
>* target
=
1402 static_cast<Target_powerpc
<size
, big_endian
>*>(
1403 parameters
->sized_target
<size
, big_endian
>());
1404 Output_data_got_powerpc
<size
, big_endian
>* got
1405 = target
->got_section(symtab
, layout
);
1406 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1407 Symbol_table::PREDEFINED
,
1411 elfcpp::STV_HIDDEN
, 0,
1415 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1416 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1417 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1419 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1421 = layout
->add_output_section_data(".sdata", 0,
1423 | elfcpp::SHF_WRITE
,
1424 sdata
, ORDER_SMALL_DATA
, false);
1425 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1426 Symbol_table::PREDEFINED
,
1427 os
, 32768, 0, elfcpp::STT_OBJECT
,
1428 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1432 Sized_relobj_file
<size
, big_endian
>::do_scan_relocs(symtab
, layout
, rd
);
1435 // Set up PowerPC target specific relobj.
1437 template<int size
, bool big_endian
>
1439 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1440 const std::string
& name
,
1441 Input_file
* input_file
,
1442 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1444 int et
= ehdr
.get_e_type();
1445 // ET_EXEC files are valid input for --just-symbols/-R,
1446 // and we treat them as relocatable objects.
1447 if (et
== elfcpp::ET_REL
1448 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1450 Powerpc_relobj
<size
, big_endian
>* obj
=
1451 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1455 else if (et
== elfcpp::ET_DYN
)
1457 Sized_dynobj
<size
, big_endian
>* obj
=
1458 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1464 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1469 template<int size
, bool big_endian
>
1470 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1473 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1474 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1476 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1477 : Output_data_got
<size
, big_endian
>(),
1478 symtab_(symtab
), layout_(layout
),
1479 header_ent_cnt_(size
== 32 ? 3 : 1),
1480 header_index_(size
== 32 ? 0x2000 : 0)
1485 // Create a new GOT entry and return its offset.
1487 add_got_entry(Got_entry got_entry
)
1489 this->reserve_ent();
1490 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1493 // Create a pair of new GOT entries and return the offset of the first.
1495 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1497 this->reserve_ent(2);
1498 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1503 add_constant_pair(Valtype c1
, Valtype c2
)
1505 this->reserve_ent(2);
1506 unsigned int got_offset
= this->add_constant(c1
);
1507 this->add_constant(c2
);
1511 // Offset of _GLOBAL_OFFSET_TABLE_.
1515 return this->got_offset(this->header_index_
);
1518 // Offset of base used to access the GOT/TOC.
1519 // The got/toc pointer reg will be set to this value.
1521 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1524 return this->g_o_t();
1526 return (this->output_section()->address()
1527 + object
->toc_base_offset()
1531 // Ensure our GOT has a header.
1533 set_final_data_size()
1535 if (this->header_ent_cnt_
!= 0)
1536 this->make_header();
1537 Output_data_got
<size
, big_endian
>::set_final_data_size();
1540 // First word of GOT header needs some values that are not
1541 // handled by Output_data_got so poke them in here.
1542 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1544 do_write(Output_file
* of
)
1547 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
1548 val
= this->layout_
->dynamic_section()->address();
1550 val
= this->output_section()->address() + 0x8000;
1551 this->replace_constant(this->header_index_
, val
);
1552 Output_data_got
<size
, big_endian
>::do_write(of
);
1557 reserve_ent(unsigned int cnt
= 1)
1559 if (this->header_ent_cnt_
== 0)
1561 if (this->num_entries() + cnt
> this->header_index_
)
1562 this->make_header();
1568 this->header_ent_cnt_
= 0;
1569 this->header_index_
= this->num_entries();
1572 Output_data_got
<size
, big_endian
>::add_constant(0);
1573 Output_data_got
<size
, big_endian
>::add_constant(0);
1574 Output_data_got
<size
, big_endian
>::add_constant(0);
1576 // Define _GLOBAL_OFFSET_TABLE_ at the header
1577 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1580 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
1581 sym
->set_value(this->g_o_t());
1584 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1585 Symbol_table::PREDEFINED
,
1586 this, this->g_o_t(), 0,
1589 elfcpp::STV_HIDDEN
, 0,
1593 Output_data_got
<size
, big_endian
>::add_constant(0);
1596 // Stashed pointers.
1597 Symbol_table
* symtab_
;
1601 unsigned int header_ent_cnt_
;
1602 // GOT header index.
1603 unsigned int header_index_
;
1606 // Get the GOT section, creating it if necessary.
1608 template<int size
, bool big_endian
>
1609 Output_data_got_powerpc
<size
, big_endian
>*
1610 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1613 if (this->got_
== NULL
)
1615 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1618 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1620 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1621 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1622 this->got_
, ORDER_DATA
, false);
1628 // Get the dynamic reloc section, creating it if necessary.
1630 template<int size
, bool big_endian
>
1631 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1632 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1634 if (this->rela_dyn_
== NULL
)
1636 gold_assert(layout
!= NULL
);
1637 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1638 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1639 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1640 ORDER_DYNAMIC_RELOCS
, false);
1642 return this->rela_dyn_
;
1645 // A class to handle the PLT data.
1647 template<int size
, bool big_endian
>
1648 class Output_data_plt_powerpc
: public Output_section_data_build
1651 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
1652 size
, big_endian
> Reloc_section
;
1654 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
1655 Reloc_section
* plt_rel
,
1656 unsigned int reserved_size
,
1658 : Output_section_data_build(size
== 32 ? 4 : 8),
1661 initial_plt_entry_size_(reserved_size
),
1665 // Add an entry to the PLT.
1670 add_ifunc_entry(Symbol
*);
1673 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
1675 // Return the .rela.plt section data.
1682 // Return the number of PLT entries.
1686 return ((this->current_data_size() - this->initial_plt_entry_size_
)
1690 // Return the offset of the first non-reserved PLT entry.
1692 first_plt_entry_offset()
1693 { return this->initial_plt_entry_size_
; }
1695 // Return the size of a PLT entry.
1697 get_plt_entry_size()
1698 { return plt_entry_size
; }
1702 do_adjust_output_section(Output_section
* os
)
1707 // Write to a map file.
1709 do_print_to_mapfile(Mapfile
* mapfile
) const
1710 { mapfile
->print_output_data(this, this->name_
); }
1713 // The size of an entry in the PLT.
1714 static const int plt_entry_size
= size
== 32 ? 4 : 24;
1716 // Write out the PLT data.
1718 do_write(Output_file
*);
1720 // The reloc section.
1721 Reloc_section
* rel_
;
1722 // Allows access to .glink for do_write.
1723 Target_powerpc
<size
, big_endian
>* targ_
;
1724 // The size of the first reserved entry.
1725 int initial_plt_entry_size_
;
1726 // What to report in map file.
1730 // Add an entry to the PLT.
1732 template<int size
, bool big_endian
>
1734 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
1736 if (!gsym
->has_plt_offset())
1738 off_t off
= this->current_data_size();
1740 off
+= this->first_plt_entry_offset();
1741 gsym
->set_plt_offset(off
);
1742 gsym
->set_needs_dynsym_entry();
1743 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
1744 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
1745 off
+= plt_entry_size
;
1746 this->set_current_data_size(off
);
1750 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
1752 template<int size
, bool big_endian
>
1754 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
1756 if (!gsym
->has_plt_offset())
1758 off_t off
= this->current_data_size();
1759 gsym
->set_plt_offset(off
);
1760 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1762 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1763 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
1764 off
+= plt_entry_size
;
1765 this->set_current_data_size(off
);
1769 // Add an entry for a local ifunc symbol to the IPLT.
1771 template<int size
, bool big_endian
>
1773 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
1774 Sized_relobj_file
<size
, big_endian
>* relobj
,
1775 unsigned int local_sym_index
)
1777 if (!relobj
->local_has_plt_offset(local_sym_index
))
1779 off_t off
= this->current_data_size();
1780 relobj
->set_local_plt_offset(local_sym_index
, off
);
1781 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1783 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1784 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
1786 off
+= plt_entry_size
;
1787 this->set_current_data_size(off
);
1791 static const uint32_t add_0_11_11
= 0x7c0b5a14;
1792 static const uint32_t add_3_3_2
= 0x7c631214;
1793 static const uint32_t add_3_3_13
= 0x7c636a14;
1794 static const uint32_t add_11_0_11
= 0x7d605a14;
1795 static const uint32_t add_12_2_11
= 0x7d825a14;
1796 static const uint32_t addi_11_11
= 0x396b0000;
1797 static const uint32_t addi_12_12
= 0x398c0000;
1798 static const uint32_t addi_2_2
= 0x38420000;
1799 static const uint32_t addi_3_2
= 0x38620000;
1800 static const uint32_t addi_3_3
= 0x38630000;
1801 static const uint32_t addis_0_2
= 0x3c020000;
1802 static const uint32_t addis_0_13
= 0x3c0d0000;
1803 static const uint32_t addis_11_11
= 0x3d6b0000;
1804 static const uint32_t addis_11_30
= 0x3d7e0000;
1805 static const uint32_t addis_12_12
= 0x3d8c0000;
1806 static const uint32_t addis_12_2
= 0x3d820000;
1807 static const uint32_t addis_3_2
= 0x3c620000;
1808 static const uint32_t addis_3_13
= 0x3c6d0000;
1809 static const uint32_t b
= 0x48000000;
1810 static const uint32_t bcl_20_31
= 0x429f0005;
1811 static const uint32_t bctr
= 0x4e800420;
1812 static const uint32_t blr
= 0x4e800020;
1813 static const uint32_t blrl
= 0x4e800021;
1814 static const uint32_t cror_15_15_15
= 0x4def7b82;
1815 static const uint32_t cror_31_31_31
= 0x4ffffb82;
1816 static const uint32_t ld_0_1
= 0xe8010000;
1817 static const uint32_t ld_0_12
= 0xe80c0000;
1818 static const uint32_t ld_11_12
= 0xe96c0000;
1819 static const uint32_t ld_11_2
= 0xe9620000;
1820 static const uint32_t ld_2_1
= 0xe8410000;
1821 static const uint32_t ld_2_11
= 0xe84b0000;
1822 static const uint32_t ld_2_12
= 0xe84c0000;
1823 static const uint32_t ld_2_2
= 0xe8420000;
1824 static const uint32_t lfd_0_1
= 0xc8010000;
1825 static const uint32_t li_0_0
= 0x38000000;
1826 static const uint32_t li_12_0
= 0x39800000;
1827 static const uint32_t lis_0_0
= 0x3c000000;
1828 static const uint32_t lis_11
= 0x3d600000;
1829 static const uint32_t lis_12
= 0x3d800000;
1830 static const uint32_t lwz_0_12
= 0x800c0000;
1831 static const uint32_t lwz_11_11
= 0x816b0000;
1832 static const uint32_t lwz_11_30
= 0x817e0000;
1833 static const uint32_t lwz_12_12
= 0x818c0000;
1834 static const uint32_t lwzu_0_12
= 0x840c0000;
1835 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
1836 static const uint32_t mflr_0
= 0x7c0802a6;
1837 static const uint32_t mflr_11
= 0x7d6802a6;
1838 static const uint32_t mflr_12
= 0x7d8802a6;
1839 static const uint32_t mtctr_0
= 0x7c0903a6;
1840 static const uint32_t mtctr_11
= 0x7d6903a6;
1841 static const uint32_t mtlr_0
= 0x7c0803a6;
1842 static const uint32_t mtlr_12
= 0x7d8803a6;
1843 static const uint32_t nop
= 0x60000000;
1844 static const uint32_t ori_0_0_0
= 0x60000000;
1845 static const uint32_t std_0_1
= 0xf8010000;
1846 static const uint32_t std_0_12
= 0xf80c0000;
1847 static const uint32_t std_2_1
= 0xf8410000;
1848 static const uint32_t stfd_0_1
= 0xd8010000;
1849 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
1850 static const uint32_t sub_11_11_12
= 0x7d6c5850;
1852 // Write out the PLT.
1854 template<int size
, bool big_endian
>
1856 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
1860 const off_t offset
= this->offset();
1861 const section_size_type oview_size
1862 = convert_to_section_size_type(this->data_size());
1863 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1864 unsigned char* pov
= oview
;
1865 unsigned char* endpov
= oview
+ oview_size
;
1867 // The address of the .glink branch table
1868 const Output_data_glink
<size
, big_endian
>* glink
1869 = this->targ_
->glink_section();
1870 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
1871 = glink
->address() + glink
->pltresolve();
1873 while (pov
< endpov
)
1875 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
1880 of
->write_output_view(offset
, oview_size
, oview
);
1884 // Create the PLT section.
1886 template<int size
, bool big_endian
>
1888 Target_powerpc
<size
, big_endian
>::make_plt_section(Layout
* layout
)
1890 if (this->plt_
== NULL
)
1892 if (this->glink_
== NULL
)
1893 make_glink_section(layout
);
1895 // Ensure that .rela.dyn always appears before .rela.plt This is
1896 // necessary due to how, on PowerPC and some other targets, .rela.dyn
1897 // needs to include .rela.plt in it's range.
1898 this->rela_dyn_section(layout
);
1900 Reloc_section
* plt_rel
= new Reloc_section(false);
1901 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
1902 elfcpp::SHF_ALLOC
, plt_rel
,
1903 ORDER_DYNAMIC_PLT_RELOCS
, false);
1905 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
1906 size
== 32 ? 0 : 24,
1908 layout
->add_output_section_data(".plt",
1910 ? elfcpp::SHT_PROGBITS
1911 : elfcpp::SHT_NOBITS
),
1912 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1921 // Create the IPLT section.
1923 template<int size
, bool big_endian
>
1925 Target_powerpc
<size
, big_endian
>::make_iplt_section(Layout
* layout
)
1927 if (this->iplt_
== NULL
)
1929 this->make_plt_section(layout
);
1931 Reloc_section
* iplt_rel
= new Reloc_section(false);
1932 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
1934 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
1936 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
1940 // A class to handle .glink.
1942 template<int size
, bool big_endian
>
1943 class Output_data_glink
: public Output_section_data
1946 static const int pltresolve_size
= 16*4;
1948 Output_data_glink(Target_powerpc
<size
, big_endian
>*);
1952 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1954 const elfcpp::Rela
<size
, big_endian
>&);
1957 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1959 const elfcpp::Rela
<size
, big_endian
>&);
1962 find_entry(const Symbol
*) const;
1965 find_entry(const Sized_relobj_file
<size
, big_endian
>*, unsigned int) const;
1968 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1970 const elfcpp::Rela
<size
, big_endian
>&) const;
1973 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1975 const elfcpp::Rela
<size
, big_endian
>&) const;
1978 glink_entry_size() const
1983 // FIXME: We should be using multiple glink sections for
1984 // stubs to support > 33M applications.
1991 return this->pltresolve_
;
1995 // Write to a map file.
1997 do_print_to_mapfile(Mapfile
* mapfile
) const
1998 { mapfile
->print_output_data(this, _("** glink")); }
2002 set_final_data_size();
2006 do_write(Output_file
*);
2011 Glink_sym_ent(const Symbol
* sym
)
2012 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2015 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2016 unsigned int locsym_index
)
2017 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2020 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2022 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2023 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2026 this->addend_
= reloc
.get_r_addend();
2027 else if (parameters
->options().output_is_position_independent()
2028 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2029 == elfcpp::R_PPC_PLTREL24
))
2031 this->addend_
= reloc
.get_r_addend();
2032 if (this->addend_
>= 32768)
2033 this->object_
= object
;
2037 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2038 unsigned int locsym_index
,
2039 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2040 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2043 this->addend_
= reloc
.get_r_addend();
2044 else if (parameters
->options().output_is_position_independent()
2045 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2046 == elfcpp::R_PPC_PLTREL24
))
2047 this->addend_
= reloc
.get_r_addend();
2050 bool operator==(const Glink_sym_ent
& that
) const
2052 return (this->sym_
== that
.sym_
2053 && this->object_
== that
.object_
2054 && this->addend_
== that
.addend_
2055 && this->locsym_
== that
.locsym_
);
2059 const Sized_relobj_file
<size
, big_endian
>* object_
;
2060 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
2061 unsigned int locsym_
;
2064 class Glink_sym_ent_hash
2067 size_t operator()(const Glink_sym_ent
& ent
) const
2069 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
2070 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
2076 // Map sym/object/addend to index.
2077 typedef Unordered_map
<Glink_sym_ent
, unsigned int,
2078 Glink_sym_ent_hash
> Glink_entries
;
2079 Glink_entries glink_entries_
;
2081 // Offset of pltresolve stub (actually, branch table for 32-bit)
2084 // Allows access to .got and .plt for do_write.
2085 Target_powerpc
<size
, big_endian
>* targ_
;
2088 // Create the glink section.
2090 template<int size
, bool big_endian
>
2091 Output_data_glink
<size
, big_endian
>::Output_data_glink(
2092 Target_powerpc
<size
, big_endian
>* targ
)
2093 : Output_section_data(16),
2094 pltresolve_(0), targ_(targ
)
2098 // Add an entry to glink, if we do not already have one for this
2099 // sym/object/addend combo.
2101 template<int size
, bool big_endian
>
2103 Output_data_glink
<size
, big_endian
>::add_entry(
2104 const Sized_relobj_file
<size
, big_endian
>* object
,
2106 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2108 Glink_sym_ent
ent(object
, gsym
, reloc
);
2109 unsigned int indx
= this->glink_entries_
.size();
2110 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
2113 template<int size
, bool big_endian
>
2115 Output_data_glink
<size
, big_endian
>::add_entry(
2116 const Sized_relobj_file
<size
, big_endian
>* object
,
2117 unsigned int locsym_index
,
2118 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2120 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
2121 unsigned int indx
= this->glink_entries_
.size();
2122 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
2125 template<int size
, bool big_endian
>
2127 Output_data_glink
<size
, big_endian
>::find_entry(
2128 const Sized_relobj_file
<size
, big_endian
>* object
,
2130 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2132 Glink_sym_ent
ent(object
, gsym
, reloc
);
2133 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2134 gold_assert(p
!= this->glink_entries_
.end());
2138 template<int size
, bool big_endian
>
2140 Output_data_glink
<size
, big_endian
>::find_entry(const Symbol
* gsym
) const
2142 Glink_sym_ent
ent(gsym
);
2143 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2144 gold_assert(p
!= this->glink_entries_
.end());
2148 template<int size
, bool big_endian
>
2150 Output_data_glink
<size
, big_endian
>::find_entry(
2151 const Sized_relobj_file
<size
, big_endian
>* object
,
2152 unsigned int locsym_index
,
2153 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2155 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
2156 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2157 gold_assert(p
!= this->glink_entries_
.end());
2161 template<int size
, bool big_endian
>
2163 Output_data_glink
<size
, big_endian
>::find_entry(
2164 const Sized_relobj_file
<size
, big_endian
>* object
,
2165 unsigned int locsym_index
) const
2167 Glink_sym_ent
ent(object
, locsym_index
);
2168 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2169 gold_assert(p
!= this->glink_entries_
.end());
2173 template<int size
, bool big_endian
>
2175 Output_data_glink
<size
, big_endian
>::set_final_data_size()
2177 unsigned int count
= this->glink_entries_
.size();
2178 off_t total
= count
;
2185 this->pltresolve_
= total
;
2187 // space for branch table
2188 total
+= 4 * (count
- 1);
2190 total
+= -total
& 15;
2191 total
+= this->pltresolve_size
;
2196 this->pltresolve_
= total
;
2197 total
+= this->pltresolve_size
;
2199 // space for branch table
2202 total
+= 4 * (count
- 0x8000);
2206 this->set_data_size(total
);
2209 static inline uint32_t
2215 static inline uint32_t
2221 static inline uint32_t
2224 return hi(a
+ 0x8000);
2227 template<bool big_endian
>
2229 write_insn(unsigned char* p
, uint32_t v
)
2231 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2234 // Write out .glink.
2236 template<int size
, bool big_endian
>
2238 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
2240 const off_t off
= this->offset();
2241 const section_size_type oview_size
=
2242 convert_to_section_size_type(this->data_size());
2243 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2246 // The base address of the .plt section.
2247 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2248 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2249 Address plt_base
= this->targ_
->plt_section()->address();
2250 Address iplt_base
= invalid_address
;
2252 const Output_data_got_powerpc
<size
, big_endian
>* got
2253 = this->targ_
->got_section();
2257 Address got_os_addr
= got
->output_section()->address();
2259 // Write out call stubs.
2260 typename
Glink_entries::const_iterator g
;
2261 for (g
= this->glink_entries_
.begin();
2262 g
!= this->glink_entries_
.end();
2267 const Symbol
* gsym
= g
->first
.sym_
;
2270 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2271 && gsym
->can_use_relative_reloc(false));
2272 plt_addr
= gsym
->plt_offset();
2277 const Sized_relobj_file
<size
, big_endian
>* relobj
2279 unsigned int local_sym_index
= g
->first
.locsym_
;
2280 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2284 if (iplt_base
== invalid_address
)
2285 iplt_base
= this->targ_
->iplt_section()->address();
2286 plt_addr
+= iplt_base
;
2289 plt_addr
+= plt_base
;
2290 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2291 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2292 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
2293 Address pltoff
= plt_addr
- got_addr
;
2295 if (pltoff
+ 0x80008000 > 0xffffffff || (pltoff
& 7) != 0)
2296 gold_error(_("%s: linkage table error against `%s'"),
2297 g
->first
.object_
->name().c_str(),
2298 g
->first
.sym_
->demangled_name().c_str());
2300 p
= oview
+ g
->second
* this->glink_entry_size();
2301 if (ha(pltoff
) != 0)
2303 write_insn
<big_endian
>(p
, addis_12_2
+ ha(pltoff
)), p
+= 4;
2304 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2305 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
)), p
+= 4;
2306 if (ha(pltoff
+ 16) != ha(pltoff
))
2308 write_insn
<big_endian
>(p
, addi_12_12
+ l(pltoff
)), p
+= 4;
2311 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2312 write_insn
<big_endian
>(p
, ld_2_12
+ l(pltoff
+ 8)), p
+= 4;
2313 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
+ 16)), p
+= 4;
2314 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2318 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2319 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
)), p
+= 4;
2320 if (ha(pltoff
+ 16) != ha(pltoff
))
2322 write_insn
<big_endian
>(p
, addi_2_2
+ l(pltoff
)), p
+= 4;
2325 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2326 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
+ 16)), p
+= 4;
2327 write_insn
<big_endian
>(p
, ld_2_2
+ l(pltoff
+ 8)), p
+= 4;
2328 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2332 // Write pltresolve stub.
2333 p
= oview
+ this->pltresolve_
;
2334 Address after_bcl
= this->address() + this->pltresolve_
+ 16;
2335 Address pltoff
= plt_base
- after_bcl
;
2337 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
2339 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
2340 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
2341 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
2342 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
2343 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
2344 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
2345 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
2346 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
2347 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2348 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
2349 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2350 while (p
< oview
+ this->pltresolve_
+ this->pltresolve_size
)
2351 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2353 // Write lazy link call stubs.
2355 while (p
< oview
+ oview_size
)
2359 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
2363 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
2364 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
2366 uint32_t branch_off
= this->pltresolve_
+ 8 - (p
- oview
);
2367 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
2373 // The address of _GLOBAL_OFFSET_TABLE_.
2374 Address g_o_t
= got
->address() + got
->g_o_t();
2376 // Write out call stubs.
2377 typename
Glink_entries::const_iterator g
;
2378 for (g
= this->glink_entries_
.begin();
2379 g
!= this->glink_entries_
.end();
2384 const Symbol
* gsym
= g
->first
.sym_
;
2387 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2388 && gsym
->can_use_relative_reloc(false));
2389 plt_addr
= gsym
->plt_offset();
2394 const Sized_relobj_file
<size
, big_endian
>* relobj
2396 unsigned int local_sym_index
= g
->first
.locsym_
;
2397 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2401 if (iplt_base
== invalid_address
)
2402 iplt_base
= this->targ_
->iplt_section()->address();
2403 plt_addr
+= iplt_base
;
2406 plt_addr
+= plt_base
;
2408 p
= oview
+ g
->second
* this->glink_entry_size();
2409 if (parameters
->options().output_is_position_independent())
2412 const Powerpc_relobj
<size
, big_endian
>* object
= static_cast
2413 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2414 if (object
!= NULL
&& g
->first
.addend_
>= 32768)
2416 unsigned int got2
= object
->got2_shndx();
2417 got_addr
= g
->first
.object_
->get_output_section_offset(got2
);
2418 gold_assert(got_addr
!= invalid_address
);
2419 got_addr
+= (g
->first
.object_
->output_section(got2
)->address()
2420 + g
->first
.addend_
);
2425 Address pltoff
= plt_addr
- got_addr
;
2426 if (ha(pltoff
) == 0)
2428 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(pltoff
));
2429 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
2430 write_insn
<big_endian
>(p
+ 8, bctr
);
2434 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(pltoff
));
2435 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(pltoff
));
2436 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2437 write_insn
<big_endian
>(p
+ 12, bctr
);
2442 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
2443 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
2444 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2445 write_insn
<big_endian
>(p
+ 12, bctr
);
2449 // Write out pltresolve branch table.
2450 p
= oview
+ this->pltresolve_
;
2451 unsigned int the_end
= oview_size
- this->pltresolve_size
;
2452 unsigned char* end_p
= oview
+ the_end
;
2453 while (p
< end_p
- 8 * 4)
2454 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
2456 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2458 // Write out pltresolve call stub.
2459 if (parameters
->options().output_is_position_independent())
2461 Address res0_off
= this->pltresolve_
;
2462 Address after_bcl_off
= the_end
+ 12;
2463 Address bcl_res0
= after_bcl_off
- res0_off
;
2465 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
2466 write_insn
<big_endian
>(p
+ 4, mflr_0
);
2467 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
2468 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
2469 write_insn
<big_endian
>(p
+ 16, mflr_12
);
2470 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
2471 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
2473 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
2475 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
2476 if (ha(got_bcl
) == ha(got_bcl
+ 4))
2478 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
2479 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
2483 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
2484 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
2486 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
2487 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
2488 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
2489 write_insn
<big_endian
>(p
+ 52, bctr
);
2490 write_insn
<big_endian
>(p
+ 56, nop
);
2491 write_insn
<big_endian
>(p
+ 60, nop
);
2495 Address res0
= this->pltresolve_
+ this->address();
2497 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
2498 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
2499 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2500 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
2502 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
2503 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
2504 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
2505 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
2506 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2507 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
2509 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
2510 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
2511 write_insn
<big_endian
>(p
+ 32, bctr
);
2512 write_insn
<big_endian
>(p
+ 36, nop
);
2513 write_insn
<big_endian
>(p
+ 40, nop
);
2514 write_insn
<big_endian
>(p
+ 44, nop
);
2515 write_insn
<big_endian
>(p
+ 48, nop
);
2516 write_insn
<big_endian
>(p
+ 52, nop
);
2517 write_insn
<big_endian
>(p
+ 56, nop
);
2518 write_insn
<big_endian
>(p
+ 60, nop
);
2523 of
->write_output_view(off
, oview_size
, oview
);
2527 // A class to handle linker generated save/restore functions.
2529 template<int size
, bool big_endian
>
2530 class Output_data_save_res
: public Output_section_data_build
2533 Output_data_save_res(Symbol_table
* symtab
);
2536 // Write to a map file.
2538 do_print_to_mapfile(Mapfile
* mapfile
) const
2539 { mapfile
->print_output_data(this, _("** save/restore")); }
2542 do_write(Output_file
*);
2545 // The maximum size of save/restore contents.
2546 static const unsigned int savres_max
= 218*4;
2549 savres_define(Symbol_table
* symtab
,
2551 unsigned int lo
, unsigned int hi
,
2552 unsigned char* write_ent(unsigned char*, int),
2553 unsigned char* write_tail(unsigned char*, int));
2555 unsigned char *contents_
;
2558 template<bool big_endian
>
2559 static unsigned char*
2560 savegpr0(unsigned char* p
, int r
)
2562 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2563 write_insn
<big_endian
>(p
, insn
);
2567 template<bool big_endian
>
2568 static unsigned char*
2569 savegpr0_tail(unsigned char* p
, int r
)
2571 p
= savegpr0
<big_endian
>(p
, r
);
2572 uint32_t insn
= std_0_1
+ 16;
2573 write_insn
<big_endian
>(p
, insn
);
2575 write_insn
<big_endian
>(p
, blr
);
2579 template<bool big_endian
>
2580 static unsigned char*
2581 restgpr0(unsigned char* p
, int r
)
2583 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2584 write_insn
<big_endian
>(p
, insn
);
2588 template<bool big_endian
>
2589 static unsigned char*
2590 restgpr0_tail(unsigned char* p
, int r
)
2592 uint32_t insn
= ld_0_1
+ 16;
2593 write_insn
<big_endian
>(p
, insn
);
2595 p
= restgpr0
<big_endian
>(p
, r
);
2596 write_insn
<big_endian
>(p
, mtlr_0
);
2600 p
= restgpr0
<big_endian
>(p
, 30);
2601 p
= restgpr0
<big_endian
>(p
, 31);
2603 write_insn
<big_endian
>(p
, blr
);
2607 template<bool big_endian
>
2608 static unsigned char*
2609 savegpr1(unsigned char* p
, int r
)
2611 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2612 write_insn
<big_endian
>(p
, insn
);
2616 template<bool big_endian
>
2617 static unsigned char*
2618 savegpr1_tail(unsigned char* p
, int r
)
2620 p
= savegpr1
<big_endian
>(p
, r
);
2621 write_insn
<big_endian
>(p
, blr
);
2625 template<bool big_endian
>
2626 static unsigned char*
2627 restgpr1(unsigned char* p
, int r
)
2629 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2630 write_insn
<big_endian
>(p
, insn
);
2634 template<bool big_endian
>
2635 static unsigned char*
2636 restgpr1_tail(unsigned char* p
, int r
)
2638 p
= restgpr1
<big_endian
>(p
, r
);
2639 write_insn
<big_endian
>(p
, blr
);
2643 template<bool big_endian
>
2644 static unsigned char*
2645 savefpr(unsigned char* p
, int r
)
2647 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2648 write_insn
<big_endian
>(p
, insn
);
2652 template<bool big_endian
>
2653 static unsigned char*
2654 savefpr0_tail(unsigned char* p
, int r
)
2656 p
= savefpr
<big_endian
>(p
, r
);
2657 write_insn
<big_endian
>(p
, std_0_1
+ 16);
2659 write_insn
<big_endian
>(p
, blr
);
2663 template<bool big_endian
>
2664 static unsigned char*
2665 restfpr(unsigned char* p
, int r
)
2667 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2668 write_insn
<big_endian
>(p
, insn
);
2672 template<bool big_endian
>
2673 static unsigned char*
2674 restfpr0_tail(unsigned char* p
, int r
)
2676 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
2678 p
= restfpr
<big_endian
>(p
, r
);
2679 write_insn
<big_endian
>(p
, mtlr_0
);
2683 p
= restfpr
<big_endian
>(p
, 30);
2684 p
= restfpr
<big_endian
>(p
, 31);
2686 write_insn
<big_endian
>(p
, blr
);
2690 template<bool big_endian
>
2691 static unsigned char*
2692 savefpr1_tail(unsigned char* p
, int r
)
2694 p
= savefpr
<big_endian
>(p
, r
);
2695 write_insn
<big_endian
>(p
, blr
);
2699 template<bool big_endian
>
2700 static unsigned char*
2701 restfpr1_tail(unsigned char* p
, int r
)
2703 p
= restfpr
<big_endian
>(p
, r
);
2704 write_insn
<big_endian
>(p
, blr
);
2708 template<bool big_endian
>
2709 static unsigned char*
2710 savevr(unsigned char* p
, int r
)
2712 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2713 write_insn
<big_endian
>(p
, insn
);
2715 insn
= stvx_0_12_0
+ (r
<< 21);
2716 write_insn
<big_endian
>(p
, insn
);
2720 template<bool big_endian
>
2721 static unsigned char*
2722 savevr_tail(unsigned char* p
, int r
)
2724 p
= savevr
<big_endian
>(p
, r
);
2725 write_insn
<big_endian
>(p
, blr
);
2729 template<bool big_endian
>
2730 static unsigned char*
2731 restvr(unsigned char* p
, int r
)
2733 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2734 write_insn
<big_endian
>(p
, insn
);
2736 insn
= lvx_0_12_0
+ (r
<< 21);
2737 write_insn
<big_endian
>(p
, insn
);
2741 template<bool big_endian
>
2742 static unsigned char*
2743 restvr_tail(unsigned char* p
, int r
)
2745 p
= restvr
<big_endian
>(p
, r
);
2746 write_insn
<big_endian
>(p
, blr
);
2751 template<int size
, bool big_endian
>
2752 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
2753 Symbol_table
* symtab
)
2754 : Output_section_data_build(4),
2757 this->savres_define(symtab
,
2758 "_savegpr0_", 14, 31,
2759 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
2760 this->savres_define(symtab
,
2761 "_restgpr0_", 14, 29,
2762 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2763 this->savres_define(symtab
,
2764 "_restgpr0_", 30, 31,
2765 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2766 this->savres_define(symtab
,
2767 "_savegpr1_", 14, 31,
2768 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
2769 this->savres_define(symtab
,
2770 "_restgpr1_", 14, 31,
2771 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
2772 this->savres_define(symtab
,
2773 "_savefpr_", 14, 31,
2774 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
2775 this->savres_define(symtab
,
2776 "_restfpr_", 14, 29,
2777 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2778 this->savres_define(symtab
,
2779 "_restfpr_", 30, 31,
2780 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2781 this->savres_define(symtab
,
2783 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
2784 this->savres_define(symtab
,
2786 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
2787 this->savres_define(symtab
,
2789 savevr
<big_endian
>, savevr_tail
<big_endian
>);
2790 this->savres_define(symtab
,
2792 restvr
<big_endian
>, restvr_tail
<big_endian
>);
2795 template<int size
, bool big_endian
>
2797 Output_data_save_res
<size
, big_endian
>::savres_define(
2798 Symbol_table
* symtab
,
2800 unsigned int lo
, unsigned int hi
,
2801 unsigned char* write_ent(unsigned char*, int),
2802 unsigned char* write_tail(unsigned char*, int))
2804 size_t len
= strlen(name
);
2805 bool writing
= false;
2808 memcpy(sym
, name
, len
);
2811 for (unsigned int i
= lo
; i
<= hi
; i
++)
2813 sym
[len
+ 0] = i
/ 10 + '0';
2814 sym
[len
+ 1] = i
% 10 + '0';
2815 Symbol
* gsym
= symtab
->lookup(sym
);
2816 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
2817 writing
= writing
|| refd
;
2820 if (this->contents_
== NULL
)
2821 this->contents_
= new unsigned char[this->savres_max
];
2823 off_t value
= this->current_data_size();
2824 unsigned char* p
= this->contents_
+ value
;
2826 p
= write_ent(p
, i
);
2828 p
= write_tail(p
, i
);
2829 off_t cur_size
= p
- this->contents_
;
2830 this->set_current_data_size(cur_size
);
2832 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
2833 this, value
, cur_size
- value
,
2834 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
2835 elfcpp::STV_HIDDEN
, 0, false, false);
2840 // Write out save/restore.
2842 template<int size
, bool big_endian
>
2844 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
2846 const off_t off
= this->offset();
2847 const section_size_type oview_size
=
2848 convert_to_section_size_type(this->data_size());
2849 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2850 memcpy(oview
, this->contents_
, oview_size
);
2851 of
->write_output_view(off
, oview_size
, oview
);
2855 // Create the glink section.
2857 template<int size
, bool big_endian
>
2859 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
2861 if (this->glink_
== NULL
)
2863 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
2864 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
2865 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
2866 this->glink_
, ORDER_TEXT
, false);
2870 // Create a PLT entry for a global symbol.
2872 template<int size
, bool big_endian
>
2874 Target_powerpc
<size
, big_endian
>::make_plt_entry(
2877 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2878 const Sized_relobj_file
<size
, big_endian
>* object
)
2880 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
2881 && gsym
->can_use_relative_reloc(false))
2883 if (this->iplt_
== NULL
)
2884 this->make_iplt_section(layout
);
2885 this->iplt_
->add_ifunc_entry(gsym
);
2889 if (this->plt_
== NULL
)
2890 this->make_plt_section(layout
);
2891 this->plt_
->add_entry(gsym
);
2893 this->glink_
->add_entry(object
, gsym
, reloc
);
2896 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
2898 template<int size
, bool big_endian
>
2900 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
2902 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2903 Sized_relobj_file
<size
, big_endian
>* relobj
)
2905 if (this->iplt_
== NULL
)
2906 this->make_iplt_section(layout
);
2907 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2908 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
2909 this->glink_
->add_entry(relobj
, r_sym
, reloc
);
2912 // Return the number of entries in the PLT.
2914 template<int size
, bool big_endian
>
2916 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
2918 if (this->plt_
== NULL
)
2920 unsigned int count
= this->plt_
->entry_count();
2921 if (this->iplt_
!= NULL
)
2922 count
+= this->iplt_
->entry_count();
2926 // Return the offset of the first non-reserved PLT entry.
2928 template<int size
, bool big_endian
>
2930 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
2932 return this->plt_
->first_plt_entry_offset();
2935 // Return the size of each PLT entry.
2937 template<int size
, bool big_endian
>
2939 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
2941 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
2944 // Create a GOT entry for local dynamic __tls_get_addr calls.
2946 template<int size
, bool big_endian
>
2948 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
2949 Symbol_table
* symtab
,
2951 Sized_relobj_file
<size
, big_endian
>* object
)
2953 if (this->tlsld_got_offset_
== -1U)
2955 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
2956 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
2957 Output_data_got_powerpc
<size
, big_endian
>* got
2958 = this->got_section(symtab
, layout
);
2959 unsigned int got_offset
= got
->add_constant_pair(0, 0);
2960 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
2962 this->tlsld_got_offset_
= got_offset
;
2964 return this->tlsld_got_offset_
;
2967 // Get the Reference_flags for a particular relocation.
2969 template<int size
, bool big_endian
>
2971 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
2975 case elfcpp::R_POWERPC_NONE
:
2976 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2977 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2978 case elfcpp::R_PPC64_TOC
:
2979 // No symbol reference.
2982 case elfcpp::R_PPC64_ADDR64
:
2983 case elfcpp::R_PPC64_UADDR64
:
2984 case elfcpp::R_POWERPC_ADDR32
:
2985 case elfcpp::R_POWERPC_UADDR32
:
2986 case elfcpp::R_POWERPC_ADDR16
:
2987 case elfcpp::R_POWERPC_UADDR16
:
2988 case elfcpp::R_POWERPC_ADDR16_LO
:
2989 case elfcpp::R_POWERPC_ADDR16_HI
:
2990 case elfcpp::R_POWERPC_ADDR16_HA
:
2991 return Symbol::ABSOLUTE_REF
;
2993 case elfcpp::R_POWERPC_ADDR24
:
2994 case elfcpp::R_POWERPC_ADDR14
:
2995 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2996 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2997 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
2999 case elfcpp::R_PPC64_REL64
:
3000 case elfcpp::R_POWERPC_REL32
:
3001 case elfcpp::R_PPC_LOCAL24PC
:
3002 case elfcpp::R_POWERPC_REL16
:
3003 case elfcpp::R_POWERPC_REL16_LO
:
3004 case elfcpp::R_POWERPC_REL16_HI
:
3005 case elfcpp::R_POWERPC_REL16_HA
:
3006 return Symbol::RELATIVE_REF
;
3008 case elfcpp::R_POWERPC_REL24
:
3009 case elfcpp::R_PPC_PLTREL24
:
3010 case elfcpp::R_POWERPC_REL14
:
3011 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3012 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3013 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
3015 case elfcpp::R_POWERPC_GOT16
:
3016 case elfcpp::R_POWERPC_GOT16_LO
:
3017 case elfcpp::R_POWERPC_GOT16_HI
:
3018 case elfcpp::R_POWERPC_GOT16_HA
:
3019 case elfcpp::R_PPC64_GOT16_DS
:
3020 case elfcpp::R_PPC64_GOT16_LO_DS
:
3021 case elfcpp::R_PPC64_TOC16
:
3022 case elfcpp::R_PPC64_TOC16_LO
:
3023 case elfcpp::R_PPC64_TOC16_HI
:
3024 case elfcpp::R_PPC64_TOC16_HA
:
3025 case elfcpp::R_PPC64_TOC16_DS
:
3026 case elfcpp::R_PPC64_TOC16_LO_DS
:
3028 return Symbol::ABSOLUTE_REF
;
3030 case elfcpp::R_POWERPC_GOT_TPREL16
:
3031 case elfcpp::R_POWERPC_TLS
:
3032 return Symbol::TLS_REF
;
3034 case elfcpp::R_POWERPC_COPY
:
3035 case elfcpp::R_POWERPC_GLOB_DAT
:
3036 case elfcpp::R_POWERPC_JMP_SLOT
:
3037 case elfcpp::R_POWERPC_RELATIVE
:
3038 case elfcpp::R_POWERPC_DTPMOD
:
3040 // Not expected. We will give an error later.
3045 // Report an unsupported relocation against a local symbol.
3047 template<int size
, bool big_endian
>
3049 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
3050 Sized_relobj_file
<size
, big_endian
>* object
,
3051 unsigned int r_type
)
3053 gold_error(_("%s: unsupported reloc %u against local symbol"),
3054 object
->name().c_str(), r_type
);
3057 // We are about to emit a dynamic relocation of type R_TYPE. If the
3058 // dynamic linker does not support it, issue an error.
3060 template<int size
, bool big_endian
>
3062 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
3063 unsigned int r_type
)
3065 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
3067 // These are the relocation types supported by glibc for both 32-bit
3068 // and 64-bit powerpc.
3071 case elfcpp::R_POWERPC_NONE
:
3072 case elfcpp::R_POWERPC_RELATIVE
:
3073 case elfcpp::R_POWERPC_GLOB_DAT
:
3074 case elfcpp::R_POWERPC_DTPMOD
:
3075 case elfcpp::R_POWERPC_DTPREL
:
3076 case elfcpp::R_POWERPC_TPREL
:
3077 case elfcpp::R_POWERPC_JMP_SLOT
:
3078 case elfcpp::R_POWERPC_COPY
:
3079 case elfcpp::R_POWERPC_IRELATIVE
:
3080 case elfcpp::R_POWERPC_ADDR32
:
3081 case elfcpp::R_POWERPC_UADDR32
:
3082 case elfcpp::R_POWERPC_ADDR24
:
3083 case elfcpp::R_POWERPC_ADDR16
:
3084 case elfcpp::R_POWERPC_UADDR16
:
3085 case elfcpp::R_POWERPC_ADDR16_LO
:
3086 case elfcpp::R_POWERPC_ADDR16_HI
:
3087 case elfcpp::R_POWERPC_ADDR16_HA
:
3088 case elfcpp::R_POWERPC_ADDR14
:
3089 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3090 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3091 case elfcpp::R_POWERPC_REL32
:
3092 case elfcpp::R_POWERPC_REL24
:
3093 case elfcpp::R_POWERPC_TPREL16
:
3094 case elfcpp::R_POWERPC_TPREL16_LO
:
3095 case elfcpp::R_POWERPC_TPREL16_HI
:
3096 case elfcpp::R_POWERPC_TPREL16_HA
:
3107 // These are the relocation types supported only on 64-bit.
3108 case elfcpp::R_PPC64_ADDR64
:
3109 case elfcpp::R_PPC64_UADDR64
:
3110 case elfcpp::R_PPC64_JMP_IREL
:
3111 case elfcpp::R_PPC64_ADDR16_DS
:
3112 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3113 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3114 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3115 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3116 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3117 case elfcpp::R_PPC64_REL64
:
3118 case elfcpp::R_POWERPC_ADDR30
:
3119 case elfcpp::R_PPC64_TPREL16_DS
:
3120 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3121 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3122 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3123 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3124 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3135 // These are the relocation types supported only on 32-bit.
3136 // ??? glibc ld.so doesn't need to support these.
3137 case elfcpp::R_POWERPC_DTPREL16
:
3138 case elfcpp::R_POWERPC_DTPREL16_LO
:
3139 case elfcpp::R_POWERPC_DTPREL16_HI
:
3140 case elfcpp::R_POWERPC_DTPREL16_HA
:
3148 // This prevents us from issuing more than one error per reloc
3149 // section. But we can still wind up issuing more than one
3150 // error per object file.
3151 if (this->issued_non_pic_error_
)
3153 gold_assert(parameters
->options().output_is_position_independent());
3154 object
->error(_("requires unsupported dynamic reloc; "
3155 "recompile with -fPIC"));
3156 this->issued_non_pic_error_
= true;
3160 // Return whether we need to make a PLT entry for a relocation of the
3161 // given type against a STT_GNU_IFUNC symbol.
3163 template<int size
, bool big_endian
>
3165 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
3166 Sized_relobj_file
<size
, big_endian
>* object
,
3167 unsigned int r_type
)
3169 // In non-pic code any reference will resolve to the plt call stub
3170 // for the ifunc symbol.
3171 if (size
== 32 && !parameters
->options().output_is_position_independent())
3176 // Word size refs from data sections are OK.
3177 case elfcpp::R_POWERPC_ADDR32
:
3178 case elfcpp::R_POWERPC_UADDR32
:
3183 case elfcpp::R_PPC64_ADDR64
:
3184 case elfcpp::R_PPC64_UADDR64
:
3189 // GOT refs are good.
3190 case elfcpp::R_POWERPC_GOT16
:
3191 case elfcpp::R_POWERPC_GOT16_LO
:
3192 case elfcpp::R_POWERPC_GOT16_HI
:
3193 case elfcpp::R_POWERPC_GOT16_HA
:
3194 case elfcpp::R_PPC64_GOT16_DS
:
3195 case elfcpp::R_PPC64_GOT16_LO_DS
:
3198 // So are function calls.
3199 case elfcpp::R_POWERPC_ADDR24
:
3200 case elfcpp::R_POWERPC_ADDR14
:
3201 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3202 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3203 case elfcpp::R_POWERPC_REL24
:
3204 case elfcpp::R_PPC_PLTREL24
:
3205 case elfcpp::R_POWERPC_REL14
:
3206 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3207 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3214 // Anything else is a problem.
3215 // If we are building a static executable, the libc startup function
3216 // responsible for applying indirect function relocations is going
3217 // to complain about the reloc type.
3218 // If we are building a dynamic executable, we will have a text
3219 // relocation. The dynamic loader will set the text segment
3220 // writable and non-executable to apply text relocations. So we'll
3221 // segfault when trying to run the indirection function to resolve
3223 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
3224 object
->name().c_str(), r_type
);
3228 // Scan a relocation for a local symbol.
3230 template<int size
, bool big_endian
>
3232 Target_powerpc
<size
, big_endian
>::Scan::local(
3233 Symbol_table
* symtab
,
3235 Target_powerpc
<size
, big_endian
>* target
,
3236 Sized_relobj_file
<size
, big_endian
>* object
,
3237 unsigned int data_shndx
,
3238 Output_section
* output_section
,
3239 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3240 unsigned int r_type
,
3241 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3244 Powerpc_relobj
<size
, big_endian
>* ppc_object
3245 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3250 && data_shndx
== ppc_object
->opd_shndx()
3251 && r_type
== elfcpp::R_PPC64_ADDR64
)
3252 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3256 // A local STT_GNU_IFUNC symbol may require a PLT entry.
3257 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
3258 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
3259 target
->make_local_ifunc_plt_entry(layout
, reloc
, object
);
3263 case elfcpp::R_POWERPC_NONE
:
3264 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3265 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3266 case elfcpp::R_PPC64_TOCSAVE
:
3267 case elfcpp::R_PPC_EMB_MRKREF
:
3268 case elfcpp::R_POWERPC_TLS
:
3271 case elfcpp::R_PPC64_TOC
:
3273 Output_data_got_powerpc
<size
, big_endian
>* got
3274 = target
->got_section(symtab
, layout
);
3275 if (parameters
->options().output_is_position_independent())
3277 Address off
= reloc
.get_r_offset();
3279 && data_shndx
== ppc_object
->opd_shndx()
3280 && ppc_object
->get_opd_discard(off
- 8))
3283 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3284 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3285 rela_dyn
->add_output_section_relative(got
->output_section(),
3286 elfcpp::R_POWERPC_RELATIVE
,
3288 object
, data_shndx
, off
,
3289 symobj
->toc_base_offset());
3294 case elfcpp::R_PPC64_ADDR64
:
3295 case elfcpp::R_PPC64_UADDR64
:
3296 case elfcpp::R_POWERPC_ADDR32
:
3297 case elfcpp::R_POWERPC_UADDR32
:
3298 case elfcpp::R_POWERPC_ADDR24
:
3299 case elfcpp::R_POWERPC_ADDR16
:
3300 case elfcpp::R_POWERPC_ADDR16_LO
:
3301 case elfcpp::R_POWERPC_ADDR16_HI
:
3302 case elfcpp::R_POWERPC_ADDR16_HA
:
3303 case elfcpp::R_POWERPC_UADDR16
:
3304 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3305 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3306 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3307 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3308 case elfcpp::R_PPC64_ADDR16_DS
:
3309 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3310 case elfcpp::R_POWERPC_ADDR14
:
3311 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3312 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3313 // If building a shared library (or a position-independent
3314 // executable), we need to create a dynamic relocation for
3316 if (parameters
->options().output_is_position_independent()
3317 || (size
== 64 && is_ifunc
))
3319 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3321 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
3322 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
3324 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3325 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3328 rela_dyn
= target
->iplt_section()->rel_plt();
3329 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3331 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3332 output_section
, data_shndx
,
3333 reloc
.get_r_offset(),
3334 reloc
.get_r_addend(), false);
3338 check_non_pic(object
, r_type
);
3339 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3340 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
3341 data_shndx
, reloc
.get_r_offset(),
3342 reloc
.get_r_addend());
3347 case elfcpp::R_PPC64_REL64
:
3348 case elfcpp::R_POWERPC_REL32
:
3349 case elfcpp::R_POWERPC_REL24
:
3350 case elfcpp::R_PPC_PLTREL24
:
3351 case elfcpp::R_PPC_LOCAL24PC
:
3352 case elfcpp::R_POWERPC_REL16
:
3353 case elfcpp::R_POWERPC_REL16_LO
:
3354 case elfcpp::R_POWERPC_REL16_HI
:
3355 case elfcpp::R_POWERPC_REL16_HA
:
3356 case elfcpp::R_POWERPC_REL14
:
3357 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3358 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3359 case elfcpp::R_POWERPC_SECTOFF
:
3360 case elfcpp::R_POWERPC_TPREL16
:
3361 case elfcpp::R_POWERPC_DTPREL16
:
3362 case elfcpp::R_POWERPC_SECTOFF_LO
:
3363 case elfcpp::R_POWERPC_TPREL16_LO
:
3364 case elfcpp::R_POWERPC_DTPREL16_LO
:
3365 case elfcpp::R_POWERPC_SECTOFF_HI
:
3366 case elfcpp::R_POWERPC_TPREL16_HI
:
3367 case elfcpp::R_POWERPC_DTPREL16_HI
:
3368 case elfcpp::R_POWERPC_SECTOFF_HA
:
3369 case elfcpp::R_POWERPC_TPREL16_HA
:
3370 case elfcpp::R_POWERPC_DTPREL16_HA
:
3371 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3372 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3373 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3374 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3375 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3376 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3377 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3378 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3379 case elfcpp::R_PPC64_TPREL16_DS
:
3380 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3381 case elfcpp::R_PPC64_DTPREL16_DS
:
3382 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3383 case elfcpp::R_PPC64_SECTOFF_DS
:
3384 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3385 case elfcpp::R_PPC64_TLSGD
:
3386 case elfcpp::R_PPC64_TLSLD
:
3389 case elfcpp::R_POWERPC_GOT16
:
3390 case elfcpp::R_POWERPC_GOT16_LO
:
3391 case elfcpp::R_POWERPC_GOT16_HI
:
3392 case elfcpp::R_POWERPC_GOT16_HA
:
3393 case elfcpp::R_PPC64_GOT16_DS
:
3394 case elfcpp::R_PPC64_GOT16_LO_DS
:
3396 // The symbol requires a GOT entry.
3397 Output_data_got_powerpc
<size
, big_endian
>* got
3398 = target
->got_section(symtab
, layout
);
3399 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3401 if (!parameters
->options().output_is_position_independent())
3403 if (size
== 32 && is_ifunc
)
3404 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
3406 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
3408 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
3410 // If we are generating a shared object or a pie, this
3411 // symbol's GOT entry will be set by a dynamic relocation.
3413 off
= got
->add_constant(0);
3414 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
3416 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3417 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3420 rela_dyn
= target
->iplt_section()->rel_plt();
3421 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3423 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3424 got
, off
, 0, false);
3429 case elfcpp::R_PPC64_TOC16
:
3430 case elfcpp::R_PPC64_TOC16_LO
:
3431 case elfcpp::R_PPC64_TOC16_HI
:
3432 case elfcpp::R_PPC64_TOC16_HA
:
3433 case elfcpp::R_PPC64_TOC16_DS
:
3434 case elfcpp::R_PPC64_TOC16_LO_DS
:
3435 // We need a GOT section.
3436 target
->got_section(symtab
, layout
);
3439 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3440 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3441 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3442 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3444 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
3445 if (tls_type
== tls::TLSOPT_NONE
)
3447 Output_data_got_powerpc
<size
, big_endian
>* got
3448 = target
->got_section(symtab
, layout
);
3449 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3450 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3451 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
3452 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
3454 else if (tls_type
== tls::TLSOPT_TO_LE
)
3456 // no GOT relocs needed for Local Exec.
3463 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3464 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3465 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3466 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3468 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3469 if (tls_type
== tls::TLSOPT_NONE
)
3470 target
->tlsld_got_offset(symtab
, layout
, object
);
3471 else if (tls_type
== tls::TLSOPT_TO_LE
)
3473 // no GOT relocs needed for Local Exec.
3474 if (parameters
->options().emit_relocs())
3476 Output_section
* os
= layout
->tls_segment()->first_section();
3477 gold_assert(os
!= NULL
);
3478 os
->set_needs_symtab_index();
3486 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3487 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3488 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3489 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3491 Output_data_got_powerpc
<size
, big_endian
>* got
3492 = target
->got_section(symtab
, layout
);
3493 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3494 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
3498 case elfcpp::R_POWERPC_GOT_TPREL16
:
3499 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3500 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3501 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3503 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
3504 if (tls_type
== tls::TLSOPT_NONE
)
3506 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3507 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
3509 Output_data_got_powerpc
<size
, big_endian
>* got
3510 = target
->got_section(symtab
, layout
);
3511 unsigned int off
= got
->add_constant(0);
3512 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
3514 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3515 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
3516 elfcpp::R_POWERPC_TPREL
,
3520 else if (tls_type
== tls::TLSOPT_TO_LE
)
3522 // no GOT relocs needed for Local Exec.
3530 unsupported_reloc_local(object
, r_type
);
3535 // Report an unsupported relocation against a global symbol.
3537 template<int size
, bool big_endian
>
3539 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
3540 Sized_relobj_file
<size
, big_endian
>* object
,
3541 unsigned int r_type
,
3544 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
3545 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
3548 // Scan a relocation for a global symbol.
3550 template<int size
, bool big_endian
>
3552 Target_powerpc
<size
, big_endian
>::Scan::global(
3553 Symbol_table
* symtab
,
3555 Target_powerpc
<size
, big_endian
>* target
,
3556 Sized_relobj_file
<size
, big_endian
>* object
,
3557 unsigned int data_shndx
,
3558 Output_section
* output_section
,
3559 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3560 unsigned int r_type
,
3563 Powerpc_relobj
<size
, big_endian
>* ppc_object
3564 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3566 // A STT_GNU_IFUNC symbol may require a PLT entry.
3567 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
3568 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
3569 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
3573 case elfcpp::R_POWERPC_NONE
:
3574 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3575 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3576 case elfcpp::R_PPC_LOCAL24PC
:
3577 case elfcpp::R_PPC_EMB_MRKREF
:
3578 case elfcpp::R_POWERPC_TLS
:
3581 case elfcpp::R_PPC64_TOC
:
3583 Output_data_got_powerpc
<size
, big_endian
>* got
3584 = target
->got_section(symtab
, layout
);
3585 if (parameters
->options().output_is_position_independent())
3587 Address off
= reloc
.get_r_offset();
3589 && data_shndx
== ppc_object
->opd_shndx()
3590 && ppc_object
->get_opd_discard(off
- 8))
3593 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3594 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3595 if (data_shndx
!= ppc_object
->opd_shndx())
3596 symobj
= static_cast
3597 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
3598 rela_dyn
->add_output_section_relative(got
->output_section(),
3599 elfcpp::R_POWERPC_RELATIVE
,
3601 object
, data_shndx
, off
,
3602 symobj
->toc_base_offset());
3607 case elfcpp::R_PPC64_ADDR64
:
3609 && data_shndx
== ppc_object
->opd_shndx()
3610 && (gsym
->is_defined_in_discarded_section()
3611 || gsym
->object() != object
))
3613 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3617 case elfcpp::R_PPC64_UADDR64
:
3618 case elfcpp::R_POWERPC_ADDR32
:
3619 case elfcpp::R_POWERPC_UADDR32
:
3620 case elfcpp::R_POWERPC_ADDR24
:
3621 case elfcpp::R_POWERPC_ADDR16
:
3622 case elfcpp::R_POWERPC_ADDR16_LO
:
3623 case elfcpp::R_POWERPC_ADDR16_HI
:
3624 case elfcpp::R_POWERPC_ADDR16_HA
:
3625 case elfcpp::R_POWERPC_UADDR16
:
3626 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3627 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3628 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3629 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3630 case elfcpp::R_PPC64_ADDR16_DS
:
3631 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3632 case elfcpp::R_POWERPC_ADDR14
:
3633 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3634 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3636 // Make a PLT entry if necessary.
3637 if (gsym
->needs_plt_entry())
3639 target
->make_plt_entry(layout
, gsym
, reloc
, 0);
3640 // Since this is not a PC-relative relocation, we may be
3641 // taking the address of a function. In that case we need to
3642 // set the entry in the dynamic symbol table to the address of
3643 // the PLT call stub.
3645 && gsym
->is_from_dynobj()
3646 && !parameters
->options().output_is_position_independent())
3647 gsym
->set_needs_dynsym_value();
3649 // Make a dynamic relocation if necessary.
3650 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
3651 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
3653 if (gsym
->may_need_copy_reloc())
3655 target
->copy_reloc(symtab
, layout
, object
,
3656 data_shndx
, output_section
, gsym
, reloc
);
3658 else if (((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
3659 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
3660 && (gsym
->can_use_relative_reloc(false)
3662 && data_shndx
== ppc_object
->opd_shndx())))
3664 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3665 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3666 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3668 rela_dyn
= target
->iplt_section()->rel_plt();
3669 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3671 rela_dyn
->add_symbolless_global_addend(
3672 gsym
, dynrel
, output_section
, object
, data_shndx
,
3673 reloc
.get_r_offset(), reloc
.get_r_addend());
3677 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3678 check_non_pic(object
, r_type
);
3679 rela_dyn
->add_global(gsym
, r_type
, output_section
,
3681 reloc
.get_r_offset(),
3682 reloc
.get_r_addend());
3688 case elfcpp::R_PPC_PLTREL24
:
3689 case elfcpp::R_POWERPC_REL24
:
3690 if (gsym
->needs_plt_entry()
3691 || (!gsym
->final_value_is_known()
3692 && (gsym
->is_undefined()
3693 || gsym
->is_from_dynobj()
3694 || gsym
->is_preemptible())))
3695 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
3698 case elfcpp::R_PPC64_REL64
:
3699 case elfcpp::R_POWERPC_REL32
:
3700 // Make a dynamic relocation if necessary.
3701 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
3703 if (gsym
->may_need_copy_reloc())
3705 target
->copy_reloc(symtab
, layout
, object
,
3706 data_shndx
, output_section
, gsym
,
3711 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3712 check_non_pic(object
, r_type
);
3713 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
3714 data_shndx
, reloc
.get_r_offset(),
3715 reloc
.get_r_addend());
3720 case elfcpp::R_POWERPC_REL16
:
3721 case elfcpp::R_POWERPC_REL16_LO
:
3722 case elfcpp::R_POWERPC_REL16_HI
:
3723 case elfcpp::R_POWERPC_REL16_HA
:
3724 case elfcpp::R_POWERPC_REL14
:
3725 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3726 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3727 case elfcpp::R_POWERPC_SECTOFF
:
3728 case elfcpp::R_POWERPC_TPREL16
:
3729 case elfcpp::R_POWERPC_DTPREL16
:
3730 case elfcpp::R_POWERPC_SECTOFF_LO
:
3731 case elfcpp::R_POWERPC_TPREL16_LO
:
3732 case elfcpp::R_POWERPC_DTPREL16_LO
:
3733 case elfcpp::R_POWERPC_SECTOFF_HI
:
3734 case elfcpp::R_POWERPC_TPREL16_HI
:
3735 case elfcpp::R_POWERPC_DTPREL16_HI
:
3736 case elfcpp::R_POWERPC_SECTOFF_HA
:
3737 case elfcpp::R_POWERPC_TPREL16_HA
:
3738 case elfcpp::R_POWERPC_DTPREL16_HA
:
3739 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3740 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3741 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3742 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3743 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3744 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3745 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3746 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3747 case elfcpp::R_PPC64_TPREL16_DS
:
3748 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3749 case elfcpp::R_PPC64_DTPREL16_DS
:
3750 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3751 case elfcpp::R_PPC64_SECTOFF_DS
:
3752 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3753 case elfcpp::R_PPC64_TLSGD
:
3754 case elfcpp::R_PPC64_TLSLD
:
3757 case elfcpp::R_POWERPC_GOT16
:
3758 case elfcpp::R_POWERPC_GOT16_LO
:
3759 case elfcpp::R_POWERPC_GOT16_HI
:
3760 case elfcpp::R_POWERPC_GOT16_HA
:
3761 case elfcpp::R_PPC64_GOT16_DS
:
3762 case elfcpp::R_PPC64_GOT16_LO_DS
:
3764 // The symbol requires a GOT entry.
3765 Output_data_got_powerpc
<size
, big_endian
>* got
;
3767 got
= target
->got_section(symtab
, layout
);
3768 if (gsym
->final_value_is_known())
3770 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3771 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
3773 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
3775 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
3777 // If we are generating a shared object or a pie, this
3778 // symbol's GOT entry will be set by a dynamic relocation.
3779 unsigned int off
= got
->add_constant(0);
3780 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
3782 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3783 if (gsym
->can_use_relative_reloc(false)
3785 && gsym
->visibility() == elfcpp::STV_PROTECTED
3786 && parameters
->options().shared()))
3788 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3789 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3791 rela_dyn
= target
->iplt_section()->rel_plt();
3792 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3794 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
3798 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
3799 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
3805 case elfcpp::R_PPC64_TOC16
:
3806 case elfcpp::R_PPC64_TOC16_LO
:
3807 case elfcpp::R_PPC64_TOC16_HI
:
3808 case elfcpp::R_PPC64_TOC16_HA
:
3809 case elfcpp::R_PPC64_TOC16_DS
:
3810 case elfcpp::R_PPC64_TOC16_LO_DS
:
3811 // We need a GOT section.
3812 target
->got_section(symtab
, layout
);
3815 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3816 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3817 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3818 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3820 const bool final
= gsym
->final_value_is_known();
3821 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
3822 if (tls_type
== tls::TLSOPT_NONE
)
3824 Output_data_got_powerpc
<size
, big_endian
>* got
3825 = target
->got_section(symtab
, layout
);
3826 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
3827 target
->rela_dyn_section(layout
),
3828 elfcpp::R_POWERPC_DTPMOD
,
3829 elfcpp::R_POWERPC_DTPREL
);
3831 else if (tls_type
== tls::TLSOPT_TO_IE
)
3833 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3835 Output_data_got_powerpc
<size
, big_endian
>* got
3836 = target
->got_section(symtab
, layout
);
3837 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3838 if (gsym
->is_undefined()
3839 || gsym
->is_from_dynobj())
3841 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3842 elfcpp::R_POWERPC_TPREL
);
3846 unsigned int off
= got
->add_constant(0);
3847 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3848 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3849 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3854 else if (tls_type
== tls::TLSOPT_TO_LE
)
3856 // no GOT relocs needed for Local Exec.
3863 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3864 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3865 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3866 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3868 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3869 if (tls_type
== tls::TLSOPT_NONE
)
3870 target
->tlsld_got_offset(symtab
, layout
, object
);
3871 else if (tls_type
== tls::TLSOPT_TO_LE
)
3873 // no GOT relocs needed for Local Exec.
3874 if (parameters
->options().emit_relocs())
3876 Output_section
* os
= layout
->tls_segment()->first_section();
3877 gold_assert(os
!= NULL
);
3878 os
->set_needs_symtab_index();
3886 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3887 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3888 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3889 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3891 Output_data_got_powerpc
<size
, big_endian
>* got
3892 = target
->got_section(symtab
, layout
);
3893 if (!gsym
->final_value_is_known()
3894 && (gsym
->is_from_dynobj()
3895 || gsym
->is_undefined()
3896 || gsym
->is_preemptible()))
3897 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
3898 target
->rela_dyn_section(layout
),
3899 elfcpp::R_POWERPC_DTPREL
);
3901 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
3905 case elfcpp::R_POWERPC_GOT_TPREL16
:
3906 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3907 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3908 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3910 const bool final
= gsym
->final_value_is_known();
3911 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
3912 if (tls_type
== tls::TLSOPT_NONE
)
3914 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3916 Output_data_got_powerpc
<size
, big_endian
>* got
3917 = target
->got_section(symtab
, layout
);
3918 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3919 if (gsym
->is_undefined()
3920 || gsym
->is_from_dynobj())
3922 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3923 elfcpp::R_POWERPC_TPREL
);
3927 unsigned int off
= got
->add_constant(0);
3928 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3929 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3930 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3935 else if (tls_type
== tls::TLSOPT_TO_LE
)
3937 // no GOT relocs needed for Local Exec.
3945 unsupported_reloc_global(object
, r_type
, gsym
);
3950 // Process relocations for gc.
3952 template<int size
, bool big_endian
>
3954 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
3955 Symbol_table
* symtab
,
3957 Sized_relobj_file
<size
, big_endian
>* object
,
3958 unsigned int data_shndx
,
3960 const unsigned char* prelocs
,
3962 Output_section
* output_section
,
3963 bool needs_special_offset_handling
,
3964 size_t local_symbol_count
,
3965 const unsigned char* plocal_symbols
)
3967 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
3968 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
3969 Powerpc_relobj
<size
, big_endian
>* ppc_object
3970 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3972 ppc_object
->set_opd_valid();
3973 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
3975 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
3976 for (p
= ppc_object
->access_from_map()->begin();
3977 p
!= ppc_object
->access_from_map()->end();
3980 Address dst_off
= p
->first
;
3981 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
3982 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
3983 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
3985 Object
* src_obj
= s
->first
;
3986 unsigned int src_indx
= s
->second
;
3987 symtab
->gc()->add_reference(src_obj
, src_indx
,
3988 ppc_object
, dst_indx
);
3992 ppc_object
->access_from_map()->clear();
3993 ppc_object
->process_gc_mark(symtab
);
3994 // Don't look at .opd relocs as .opd will reference everything.
3998 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
3999 typename
Target_powerpc::Relocatable_size_for_reloc
>(
4008 needs_special_offset_handling
,
4013 // Handle target specific gc actions when adding a gc reference from
4014 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
4015 // and DST_OFF. For powerpc64, this adds a referenc to the code
4016 // section of a function descriptor.
4018 template<int size
, bool big_endian
>
4020 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
4021 Symbol_table
* symtab
,
4023 unsigned int src_shndx
,
4025 unsigned int dst_shndx
,
4026 Address dst_off
) const
4028 Powerpc_relobj
<size
, big_endian
>* ppc_object
4029 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
4031 && !ppc_object
->is_dynamic()
4032 && dst_shndx
== ppc_object
->opd_shndx())
4034 if (ppc_object
->opd_valid())
4036 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
4037 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
4041 // If we haven't run scan_opd_relocs, we must delay
4042 // processing this function descriptor reference.
4043 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
4048 // Add any special sections for this symbol to the gc work list.
4049 // For powerpc64, this adds the code section of a function
4052 template<int size
, bool big_endian
>
4054 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
4055 Symbol_table
* symtab
,
4060 Powerpc_relobj
<size
, big_endian
>* ppc_object
4061 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
4063 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4064 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
4066 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
4067 Address dst_off
= gsym
->value();
4068 if (ppc_object
->opd_valid())
4070 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
4071 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
4074 ppc_object
->add_gc_mark(dst_off
);
4079 // Scan relocations for a section.
4081 template<int size
, bool big_endian
>
4083 Target_powerpc
<size
, big_endian
>::scan_relocs(
4084 Symbol_table
* symtab
,
4086 Sized_relobj_file
<size
, big_endian
>* object
,
4087 unsigned int data_shndx
,
4088 unsigned int sh_type
,
4089 const unsigned char* prelocs
,
4091 Output_section
* output_section
,
4092 bool needs_special_offset_handling
,
4093 size_t local_symbol_count
,
4094 const unsigned char* plocal_symbols
)
4096 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
4097 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
4099 if (sh_type
== elfcpp::SHT_REL
)
4101 gold_error(_("%s: unsupported REL reloc section"),
4102 object
->name().c_str());
4106 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
4115 needs_special_offset_handling
,
4120 // Functor class for processing the global symbol table.
4121 // Removes symbols defined on discarded opd entries.
4123 template<bool big_endian
>
4124 class Global_symbol_visitor_opd
4127 Global_symbol_visitor_opd()
4131 operator()(Sized_symbol
<64>* sym
)
4133 if (sym
->has_symtab_index()
4134 || sym
->source() != Symbol::FROM_OBJECT
4135 || !sym
->in_real_elf())
4138 Powerpc_relobj
<64, big_endian
>* symobj
4139 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
4140 if (symobj
->is_dynamic()
4141 || symobj
->opd_shndx() == 0)
4145 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4146 if (shndx
== symobj
->opd_shndx()
4147 && symobj
->get_opd_discard(sym
->value()))
4148 sym
->set_symtab_index(-1U);
4152 template<int size
, bool big_endian
>
4154 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
4156 Symbol_table
* symtab
)
4160 Output_data_save_res
<64, big_endian
>* savres
4161 = new Output_data_save_res
<64, big_endian
>(symtab
);
4162 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4163 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4164 savres
, ORDER_TEXT
, false);
4168 // Finalize the sections.
4170 template<int size
, bool big_endian
>
4172 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
4174 const Input_objects
*,
4175 Symbol_table
* symtab
)
4177 if (parameters
->doing_static_link())
4179 // At least some versions of glibc elf-init.o have a strong
4180 // reference to __rela_iplt marker syms. A weak ref would be
4182 if (this->iplt_
!= NULL
)
4184 Reloc_section
* rel
= this->iplt_
->rel_plt();
4185 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
4186 Symbol_table::PREDEFINED
, rel
, 0, 0,
4187 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4188 elfcpp::STV_HIDDEN
, 0, false, true);
4189 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
4190 Symbol_table::PREDEFINED
, rel
, 0, 0,
4191 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4192 elfcpp::STV_HIDDEN
, 0, true, true);
4196 symtab
->define_as_constant("__rela_iplt_start", NULL
,
4197 Symbol_table::PREDEFINED
, 0, 0,
4198 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4199 elfcpp::STV_HIDDEN
, 0, true, false);
4200 symtab
->define_as_constant("__rela_iplt_end", NULL
,
4201 Symbol_table::PREDEFINED
, 0, 0,
4202 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4203 elfcpp::STV_HIDDEN
, 0, true, false);
4209 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
4210 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
4211 this->define_save_restore_funcs(layout
, symtab
);
4214 // Fill in some more dynamic tags.
4215 Output_data_dynamic
* odyn
= layout
->dynamic_data();
4218 const Reloc_section
* rel_plt
= (this->plt_
== NULL
4220 : this->plt_
->rel_plt());
4221 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
4222 this->rela_dyn_
, true, size
== 32);
4226 if (this->got_
!= NULL
)
4228 this->got_
->finalize_data_size();
4229 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
4230 this->got_
, this->got_
->g_o_t());
4235 if (this->glink_
!= NULL
)
4237 this->glink_
->finalize_data_size();
4238 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
4240 (this->glink_
->pltresolve()
4241 + this->glink_
->pltresolve_size
4247 // Emit any relocs we saved in an attempt to avoid generating COPY
4249 if (this->copy_relocs_
.any_saved_relocs())
4250 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
4253 // Return the value to use for a branch relocation.
4255 template<int size
, bool big_endian
>
4256 typename
elfcpp::Elf_types
<size
>::Elf_Addr
4257 Target_powerpc
<size
, big_endian
>::symval_for_branch(
4259 const Sized_symbol
<size
>* gsym
,
4260 Powerpc_relobj
<size
, big_endian
>* object
,
4261 unsigned int *dest_shndx
)
4267 // If the symbol is defined in an opd section, ie. is a function
4268 // descriptor, use the function descriptor code entry address
4269 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
4271 && gsym
->source() != Symbol::FROM_OBJECT
)
4274 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4275 unsigned int shndx
= symobj
->opd_shndx();
4278 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
4279 gold_assert(opd_addr
!= invalid_address
);
4280 opd_addr
+= symobj
->output_section(shndx
)->address();
4281 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
4284 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
4285 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
4286 gold_assert(sec_addr
!= invalid_address
);
4287 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
4288 value
= sec_addr
+ sec_off
;
4293 // Perform a relocation.
4295 template<int size
, bool big_endian
>
4297 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
4298 const Relocate_info
<size
, big_endian
>* relinfo
,
4299 Target_powerpc
* target
,
4302 const elfcpp::Rela
<size
, big_endian
>& rela
,
4303 unsigned int r_type
,
4304 const Sized_symbol
<size
>* gsym
,
4305 const Symbol_value
<size
>* psymval
,
4306 unsigned char* view
,
4308 section_size_type view_size
)
4311 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
4312 || r_type
== elfcpp::R_PPC_PLTREL24
)
4314 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
4315 enum skip_tls last_tls
= this->call_tls_get_addr_
;
4316 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
4319 if (last_tls
== CALL_NOT_EXPECTED
)
4320 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4321 _("__tls_get_addr call lacks marker reloc"));
4322 else if (last_tls
== CALL_SKIP
)
4325 else if (last_tls
!= CALL_NOT_EXPECTED
)
4326 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4327 _("missing expected __tls_get_addr call"));
4329 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
4330 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
4331 Powerpc_relobj
<size
, big_endian
>* const object
4332 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
4334 bool has_plt_value
= false;
4335 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4337 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4338 : object
->local_has_plt_offset(r_sym
))
4340 const Output_data_glink
<size
, big_endian
>* glink
4341 = target
->glink_section();
4342 unsigned int glink_index
;
4344 glink_index
= glink
->find_entry(object
, gsym
, rela
);
4346 glink_index
= glink
->find_entry(object
, r_sym
, rela
);
4347 value
= glink
->address() + glink_index
* glink
->glink_entry_size();
4348 has_plt_value
= true;
4351 if (r_type
== elfcpp::R_POWERPC_GOT16
4352 || r_type
== elfcpp::R_POWERPC_GOT16_LO
4353 || r_type
== elfcpp::R_POWERPC_GOT16_HI
4354 || r_type
== elfcpp::R_POWERPC_GOT16_HA
4355 || r_type
== elfcpp::R_PPC64_GOT16_DS
4356 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
4360 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
4361 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
4365 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4366 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
4367 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
4369 value
-= target
->got_section()->got_base_offset(object
);
4371 else if (r_type
== elfcpp::R_PPC64_TOC
)
4373 value
= (target
->got_section()->output_section()->address()
4374 + object
->toc_base_offset());
4376 else if (gsym
!= NULL
4377 && (r_type
== elfcpp::R_POWERPC_REL24
4378 || r_type
== elfcpp::R_PPC_PLTREL24
)
4383 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
4384 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
4385 bool can_plt_call
= false;
4386 if (rela
.get_r_offset() + 8 <= view_size
)
4388 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4389 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
4392 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
4394 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
4395 can_plt_call
= true;
4400 // If we don't have a branch and link followed by a nop,
4401 // we can't go via the plt because there is no place to
4402 // put a toc restoring instruction.
4403 // Unless we know we won't be returning.
4404 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
4405 can_plt_call
= true;
4409 // This is not an error in one special case: A self
4410 // call. It isn't possible to cheaply verify we have
4411 // such a call so just check for a call to the same
4414 Address code
= value
;
4415 if (gsym
->source() == Symbol::FROM_OBJECT
4416 && gsym
->object() == object
)
4418 Address addend
= rela
.get_r_addend();
4419 unsigned int dest_shndx
;
4420 Address opdent
= psymval
->value(object
, addend
);
4421 code
= target
->symval_for_branch(opdent
, gsym
, object
,
4424 if (dest_shndx
== 0)
4425 dest_shndx
= gsym
->shndx(&is_ordinary
);
4426 ok
= dest_shndx
== relinfo
->data_shndx
;
4430 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4431 _("call lacks nop, can't restore toc; "
4432 "recompile with -fPIC"));
4438 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4439 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
4440 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
4441 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
4443 // First instruction of a global dynamic sequence, arg setup insn.
4444 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4445 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4446 enum Got_type got_type
= GOT_TYPE_STANDARD
;
4447 if (tls_type
== tls::TLSOPT_NONE
)
4448 got_type
= GOT_TYPE_TLSGD
;
4449 else if (tls_type
== tls::TLSOPT_TO_IE
)
4450 got_type
= GOT_TYPE_TPREL
;
4451 if (got_type
!= GOT_TYPE_STANDARD
)
4455 gold_assert(gsym
->has_got_offset(got_type
));
4456 value
= gsym
->got_offset(got_type
);
4460 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4461 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
4462 value
= object
->local_got_offset(r_sym
, got_type
);
4464 value
-= target
->got_section()->got_base_offset(object
);
4466 if (tls_type
== tls::TLSOPT_TO_IE
)
4468 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4469 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4471 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4472 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4473 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
4475 insn
|= 32 << 26; // lwz
4477 insn
|= 58 << 26; // ld
4478 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4480 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
4481 - elfcpp::R_POWERPC_GOT_TLSGD16
);
4483 else if (tls_type
== tls::TLSOPT_TO_LE
)
4485 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4486 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4488 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4489 Insn insn
= addis_3_13
;
4492 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4493 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4494 value
= psymval
->value(object
, rela
.get_r_addend());
4498 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4500 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4501 r_type
= elfcpp::R_POWERPC_NONE
;
4505 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4506 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
4507 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
4508 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
4510 // First instruction of a local dynamic sequence, arg setup insn.
4511 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4512 if (tls_type
== tls::TLSOPT_NONE
)
4514 value
= target
->tlsld_got_offset();
4515 value
-= target
->got_section()->got_base_offset(object
);
4519 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4520 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4521 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
4523 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4524 Insn insn
= addis_3_13
;
4527 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4528 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4533 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4535 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4536 r_type
= elfcpp::R_POWERPC_NONE
;
4540 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
4541 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
4542 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
4543 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
4545 // Accesses relative to a local dynamic sequence address,
4546 // no optimisation here.
4549 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
4550 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
4554 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4555 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
4556 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
4558 value
-= target
->got_section()->got_base_offset(object
);
4560 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4561 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
4562 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
4563 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
4565 // First instruction of initial exec sequence.
4566 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4567 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4568 if (tls_type
== tls::TLSOPT_NONE
)
4572 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
4573 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
4577 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4578 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
4579 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
4581 value
-= target
->got_section()->got_base_offset(object
);
4585 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4586 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4587 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
4589 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4590 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4591 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
4596 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4597 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4598 value
= psymval
->value(object
, rela
.get_r_addend());
4602 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4604 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4605 r_type
= elfcpp::R_POWERPC_NONE
;
4609 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4610 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4612 // Second instruction of a global dynamic sequence,
4613 // the __tls_get_addr call
4614 this->call_tls_get_addr_
= CALL_EXPECTED
;
4615 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4616 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4617 if (tls_type
!= tls::TLSOPT_NONE
)
4619 if (tls_type
== tls::TLSOPT_TO_IE
)
4621 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4622 Insn insn
= add_3_3_13
;
4625 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4626 r_type
= elfcpp::R_POWERPC_NONE
;
4630 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4631 Insn insn
= addi_3_3
;
4632 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4633 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4634 view
+= 2 * big_endian
;
4635 value
= psymval
->value(object
, rela
.get_r_addend());
4637 this->call_tls_get_addr_
= CALL_SKIP
;
4640 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4641 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4643 // Second instruction of a local dynamic sequence,
4644 // the __tls_get_addr call
4645 this->call_tls_get_addr_
= CALL_EXPECTED
;
4646 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4647 if (tls_type
== tls::TLSOPT_TO_LE
)
4649 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4650 Insn insn
= addi_3_3
;
4651 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4652 this->call_tls_get_addr_
= CALL_SKIP
;
4653 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4654 view
+= 2 * big_endian
;
4658 else if (r_type
== elfcpp::R_POWERPC_TLS
)
4660 // Second instruction of an initial exec sequence
4661 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4662 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4663 if (tls_type
== tls::TLSOPT_TO_LE
)
4665 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4666 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4667 unsigned int reg
= size
== 32 ? 2 : 13;
4668 insn
= at_tls_transform(insn
, reg
);
4669 gold_assert(insn
!= 0);
4670 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4671 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4672 view
+= 2 * big_endian
;
4673 value
= psymval
->value(object
, rela
.get_r_addend());
4676 else if (!has_plt_value
)
4679 unsigned int dest_shndx
;
4680 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
4681 addend
= rela
.get_r_addend();
4682 value
= psymval
->value(object
, addend
);
4683 if (size
== 64 && is_branch_reloc(r_type
))
4684 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
4689 case elfcpp::R_PPC64_REL64
:
4690 case elfcpp::R_POWERPC_REL32
:
4691 case elfcpp::R_POWERPC_REL24
:
4692 case elfcpp::R_PPC_PLTREL24
:
4693 case elfcpp::R_PPC_LOCAL24PC
:
4694 case elfcpp::R_POWERPC_REL16
:
4695 case elfcpp::R_POWERPC_REL16_LO
:
4696 case elfcpp::R_POWERPC_REL16_HI
:
4697 case elfcpp::R_POWERPC_REL16_HA
:
4698 case elfcpp::R_POWERPC_REL14
:
4699 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4700 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4704 case elfcpp::R_PPC64_TOC16
:
4705 case elfcpp::R_PPC64_TOC16_LO
:
4706 case elfcpp::R_PPC64_TOC16_HI
:
4707 case elfcpp::R_PPC64_TOC16_HA
:
4708 case elfcpp::R_PPC64_TOC16_DS
:
4709 case elfcpp::R_PPC64_TOC16_LO_DS
:
4710 // Subtract the TOC base address.
4711 value
-= (target
->got_section()->output_section()->address()
4712 + object
->toc_base_offset());
4715 case elfcpp::R_POWERPC_SECTOFF
:
4716 case elfcpp::R_POWERPC_SECTOFF_LO
:
4717 case elfcpp::R_POWERPC_SECTOFF_HI
:
4718 case elfcpp::R_POWERPC_SECTOFF_HA
:
4719 case elfcpp::R_PPC64_SECTOFF_DS
:
4720 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4722 value
-= os
->address();
4725 case elfcpp::R_PPC64_TPREL16_DS
:
4726 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4728 // R_PPC_TLSGD and R_PPC_TLSLD
4730 case elfcpp::R_POWERPC_TPREL16
:
4731 case elfcpp::R_POWERPC_TPREL16_LO
:
4732 case elfcpp::R_POWERPC_TPREL16_HI
:
4733 case elfcpp::R_POWERPC_TPREL16_HA
:
4734 case elfcpp::R_POWERPC_TPREL
:
4735 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4736 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4737 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4738 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4739 // tls symbol values are relative to tls_segment()->vaddr()
4743 case elfcpp::R_PPC64_DTPREL16_DS
:
4744 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4745 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4746 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4747 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4748 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4750 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
4751 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
4753 case elfcpp::R_POWERPC_DTPREL16
:
4754 case elfcpp::R_POWERPC_DTPREL16_LO
:
4755 case elfcpp::R_POWERPC_DTPREL16_HI
:
4756 case elfcpp::R_POWERPC_DTPREL16_HA
:
4757 case elfcpp::R_POWERPC_DTPREL
:
4758 // tls symbol values are relative to tls_segment()->vaddr()
4759 value
-= dtp_offset
;
4766 Insn branch_bit
= 0;
4769 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4770 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4771 branch_bit
= 1 << 21;
4772 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4773 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4775 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4776 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4779 if (this->is_isa_v2
)
4781 // Set 'a' bit. This is 0b00010 in BO field for branch
4782 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
4783 // for branch on CTR insns (BO == 1a00t or 1a01t).
4784 if ((insn
& (0x14 << 21)) == (0x04 << 21))
4786 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
4793 // Invert 'y' bit if not the default.
4794 if (static_cast<Signed_address
>(value
) < 0)
4797 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4805 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
4808 case elfcpp::R_POWERPC_ADDR32
:
4809 case elfcpp::R_POWERPC_UADDR32
:
4811 overflow
= Reloc::CHECK_BITFIELD
;
4814 case elfcpp::R_POWERPC_REL32
:
4816 overflow
= Reloc::CHECK_SIGNED
;
4819 case elfcpp::R_POWERPC_ADDR24
:
4820 case elfcpp::R_POWERPC_ADDR16
:
4821 case elfcpp::R_POWERPC_UADDR16
:
4822 case elfcpp::R_PPC64_ADDR16_DS
:
4823 case elfcpp::R_POWERPC_ADDR14
:
4824 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4825 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4826 overflow
= Reloc::CHECK_BITFIELD
;
4829 case elfcpp::R_POWERPC_REL24
:
4830 case elfcpp::R_PPC_PLTREL24
:
4831 case elfcpp::R_PPC_LOCAL24PC
:
4832 case elfcpp::R_POWERPC_REL16
:
4833 case elfcpp::R_PPC64_TOC16
:
4834 case elfcpp::R_POWERPC_GOT16
:
4835 case elfcpp::R_POWERPC_SECTOFF
:
4836 case elfcpp::R_POWERPC_TPREL16
:
4837 case elfcpp::R_POWERPC_DTPREL16
:
4838 case elfcpp::R_PPC64_TPREL16_DS
:
4839 case elfcpp::R_PPC64_DTPREL16_DS
:
4840 case elfcpp::R_PPC64_TOC16_DS
:
4841 case elfcpp::R_PPC64_GOT16_DS
:
4842 case elfcpp::R_PPC64_SECTOFF_DS
:
4843 case elfcpp::R_POWERPC_REL14
:
4844 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4845 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4846 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4847 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4848 case elfcpp::R_POWERPC_GOT_TPREL16
:
4849 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4850 overflow
= Reloc::CHECK_SIGNED
;
4854 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
4855 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
4858 case elfcpp::R_POWERPC_NONE
:
4859 case elfcpp::R_POWERPC_TLS
:
4860 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4861 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4862 case elfcpp::R_PPC_EMB_MRKREF
:
4865 case elfcpp::R_PPC64_ADDR64
:
4866 case elfcpp::R_PPC64_REL64
:
4867 case elfcpp::R_PPC64_TOC
:
4868 Reloc::addr64(view
, value
);
4871 case elfcpp::R_POWERPC_TPREL
:
4872 case elfcpp::R_POWERPC_DTPREL
:
4874 Reloc::addr64(view
, value
);
4876 status
= Reloc::addr32(view
, value
, overflow
);
4879 case elfcpp::R_PPC64_UADDR64
:
4880 Reloc::addr64_u(view
, value
);
4883 case elfcpp::R_POWERPC_ADDR32
:
4884 status
= Reloc::addr32(view
, value
, overflow
);
4887 case elfcpp::R_POWERPC_REL32
:
4888 case elfcpp::R_POWERPC_UADDR32
:
4889 status
= Reloc::addr32_u(view
, value
, overflow
);
4892 case elfcpp::R_POWERPC_ADDR24
:
4893 case elfcpp::R_POWERPC_REL24
:
4894 case elfcpp::R_PPC_PLTREL24
:
4895 case elfcpp::R_PPC_LOCAL24PC
:
4896 status
= Reloc::addr24(view
, value
, overflow
);
4899 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4900 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4903 status
= Reloc::addr16_ds(view
, value
, overflow
);
4906 case elfcpp::R_POWERPC_ADDR16
:
4907 case elfcpp::R_POWERPC_REL16
:
4908 case elfcpp::R_PPC64_TOC16
:
4909 case elfcpp::R_POWERPC_GOT16
:
4910 case elfcpp::R_POWERPC_SECTOFF
:
4911 case elfcpp::R_POWERPC_TPREL16
:
4912 case elfcpp::R_POWERPC_DTPREL16
:
4913 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4914 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4915 case elfcpp::R_POWERPC_GOT_TPREL16
:
4916 case elfcpp::R_POWERPC_ADDR16_LO
:
4917 case elfcpp::R_POWERPC_REL16_LO
:
4918 case elfcpp::R_PPC64_TOC16_LO
:
4919 case elfcpp::R_POWERPC_GOT16_LO
:
4920 case elfcpp::R_POWERPC_SECTOFF_LO
:
4921 case elfcpp::R_POWERPC_TPREL16_LO
:
4922 case elfcpp::R_POWERPC_DTPREL16_LO
:
4923 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4924 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4925 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4926 status
= Reloc::addr16(view
, value
, overflow
);
4929 case elfcpp::R_POWERPC_UADDR16
:
4930 status
= Reloc::addr16_u(view
, value
, overflow
);
4933 case elfcpp::R_POWERPC_ADDR16_HI
:
4934 case elfcpp::R_POWERPC_REL16_HI
:
4935 case elfcpp::R_PPC64_TOC16_HI
:
4936 case elfcpp::R_POWERPC_GOT16_HI
:
4937 case elfcpp::R_POWERPC_SECTOFF_HI
:
4938 case elfcpp::R_POWERPC_TPREL16_HI
:
4939 case elfcpp::R_POWERPC_DTPREL16_HI
:
4940 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4941 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4942 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4943 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4944 Reloc::addr16_hi(view
, value
);
4947 case elfcpp::R_POWERPC_ADDR16_HA
:
4948 case elfcpp::R_POWERPC_REL16_HA
:
4949 case elfcpp::R_PPC64_TOC16_HA
:
4950 case elfcpp::R_POWERPC_GOT16_HA
:
4951 case elfcpp::R_POWERPC_SECTOFF_HA
:
4952 case elfcpp::R_POWERPC_TPREL16_HA
:
4953 case elfcpp::R_POWERPC_DTPREL16_HA
:
4954 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4955 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4956 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4957 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4958 Reloc::addr16_ha(view
, value
);
4961 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4963 // R_PPC_EMB_NADDR16_LO
4965 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4966 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4967 Reloc::addr16_hi2(view
, value
);
4970 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4972 // R_PPC_EMB_NADDR16_HI
4974 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4975 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4976 Reloc::addr16_ha2(view
, value
);
4979 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4981 // R_PPC_EMB_NADDR16_HA
4983 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4984 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4985 Reloc::addr16_hi3(view
, value
);
4988 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4992 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4993 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4994 Reloc::addr16_ha3(view
, value
);
4997 case elfcpp::R_PPC64_DTPREL16_DS
:
4998 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5000 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
5002 case elfcpp::R_PPC64_TPREL16_DS
:
5003 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5005 // R_PPC_TLSGD, R_PPC_TLSLD
5007 case elfcpp::R_PPC64_ADDR16_DS
:
5008 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5009 case elfcpp::R_PPC64_TOC16_DS
:
5010 case elfcpp::R_PPC64_TOC16_LO_DS
:
5011 case elfcpp::R_PPC64_GOT16_DS
:
5012 case elfcpp::R_PPC64_GOT16_LO_DS
:
5013 case elfcpp::R_PPC64_SECTOFF_DS
:
5014 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5015 status
= Reloc::addr16_ds(view
, value
, overflow
);
5018 case elfcpp::R_POWERPC_ADDR14
:
5019 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5020 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5021 case elfcpp::R_POWERPC_REL14
:
5022 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5023 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5024 status
= Reloc::addr14(view
, value
, overflow
);
5027 case elfcpp::R_POWERPC_COPY
:
5028 case elfcpp::R_POWERPC_GLOB_DAT
:
5029 case elfcpp::R_POWERPC_JMP_SLOT
:
5030 case elfcpp::R_POWERPC_RELATIVE
:
5031 case elfcpp::R_POWERPC_DTPMOD
:
5032 case elfcpp::R_PPC64_JMP_IREL
:
5033 case elfcpp::R_POWERPC_IRELATIVE
:
5034 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5035 _("unexpected reloc %u in object file"),
5039 case elfcpp::R_PPC_EMB_SDA21
:
5044 // R_PPC64_TOCSAVE. For the time being this can be ignored.
5048 case elfcpp::R_PPC_EMB_SDA2I16
:
5049 case elfcpp::R_PPC_EMB_SDA2REL
:
5052 // R_PPC64_TLSGD, R_PPC64_TLSLD
5055 case elfcpp::R_POWERPC_PLT32
:
5056 case elfcpp::R_POWERPC_PLTREL32
:
5057 case elfcpp::R_POWERPC_PLT16_LO
:
5058 case elfcpp::R_POWERPC_PLT16_HI
:
5059 case elfcpp::R_POWERPC_PLT16_HA
:
5060 case elfcpp::R_PPC_SDAREL16
:
5061 case elfcpp::R_POWERPC_ADDR30
:
5062 case elfcpp::R_PPC64_PLT64
:
5063 case elfcpp::R_PPC64_PLTREL64
:
5064 case elfcpp::R_PPC64_PLTGOT16
:
5065 case elfcpp::R_PPC64_PLTGOT16_LO
:
5066 case elfcpp::R_PPC64_PLTGOT16_HI
:
5067 case elfcpp::R_PPC64_PLTGOT16_HA
:
5068 case elfcpp::R_PPC64_PLT16_LO_DS
:
5069 case elfcpp::R_PPC64_PLTGOT16_DS
:
5070 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
5071 case elfcpp::R_PPC_EMB_RELSEC16
:
5072 case elfcpp::R_PPC_EMB_RELST_LO
:
5073 case elfcpp::R_PPC_EMB_RELST_HI
:
5074 case elfcpp::R_PPC_EMB_RELST_HA
:
5075 case elfcpp::R_PPC_EMB_BIT_FLD
:
5076 case elfcpp::R_PPC_EMB_RELSDA
:
5077 case elfcpp::R_PPC_TOC16
:
5080 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5081 _("unsupported reloc %u"),
5085 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
5086 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5087 _("relocation overflow"));
5092 // Relocate section data.
5094 template<int size
, bool big_endian
>
5096 Target_powerpc
<size
, big_endian
>::relocate_section(
5097 const Relocate_info
<size
, big_endian
>* relinfo
,
5098 unsigned int sh_type
,
5099 const unsigned char* prelocs
,
5101 Output_section
* output_section
,
5102 bool needs_special_offset_handling
,
5103 unsigned char* view
,
5105 section_size_type view_size
,
5106 const Reloc_symbol_changes
* reloc_symbol_changes
)
5108 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5109 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
5110 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
5111 Powerpc_comdat_behavior
;
5113 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5115 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
5116 Powerpc_relocate
, Powerpc_comdat_behavior
>(
5122 needs_special_offset_handling
,
5126 reloc_symbol_changes
);
5129 class Powerpc_scan_relocatable_reloc
5132 // Return the strategy to use for a local symbol which is not a
5133 // section symbol, given the relocation type.
5134 inline Relocatable_relocs::Reloc_strategy
5135 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
5137 if (r_type
== 0 && r_sym
== 0)
5138 return Relocatable_relocs::RELOC_DISCARD
;
5139 return Relocatable_relocs::RELOC_COPY
;
5142 // Return the strategy to use for a local symbol which is a section
5143 // symbol, given the relocation type.
5144 inline Relocatable_relocs::Reloc_strategy
5145 local_section_strategy(unsigned int, Relobj
*)
5147 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
5150 // Return the strategy to use for a global symbol, given the
5151 // relocation type, the object, and the symbol index.
5152 inline Relocatable_relocs::Reloc_strategy
5153 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
5155 if (r_type
== elfcpp::R_PPC_PLTREL24
)
5156 return Relocatable_relocs::RELOC_SPECIAL
;
5157 return Relocatable_relocs::RELOC_COPY
;
5161 // Scan the relocs during a relocatable link.
5163 template<int size
, bool big_endian
>
5165 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
5166 Symbol_table
* symtab
,
5168 Sized_relobj_file
<size
, big_endian
>* object
,
5169 unsigned int data_shndx
,
5170 unsigned int sh_type
,
5171 const unsigned char* prelocs
,
5173 Output_section
* output_section
,
5174 bool needs_special_offset_handling
,
5175 size_t local_symbol_count
,
5176 const unsigned char* plocal_symbols
,
5177 Relocatable_relocs
* rr
)
5179 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5181 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
5182 Powerpc_scan_relocatable_reloc
>(
5190 needs_special_offset_handling
,
5196 // Emit relocations for a section.
5197 // This is a modified version of the function by the same name in
5198 // target-reloc.h. Using relocate_special_relocatable for
5199 // R_PPC_PLTREL24 would require duplication of the entire body of the
5200 // loop, so we may as well duplicate the whole thing.
5202 template<int size
, bool big_endian
>
5204 Target_powerpc
<size
, big_endian
>::relocate_relocs(
5205 const Relocate_info
<size
, big_endian
>* relinfo
,
5206 unsigned int sh_type
,
5207 const unsigned char* prelocs
,
5209 Output_section
* output_section
,
5210 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
5211 const Relocatable_relocs
* rr
,
5213 Address view_address
,
5215 unsigned char* reloc_view
,
5216 section_size_type reloc_view_size
)
5218 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5220 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
5222 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
5224 const int reloc_size
5225 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
5227 Powerpc_relobj
<size
, big_endian
>* const object
5228 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5229 const unsigned int local_count
= object
->local_symbol_count();
5230 unsigned int got2_shndx
= object
->got2_shndx();
5231 Address got2_addend
= 0;
5232 if (got2_shndx
!= 0)
5234 got2_addend
= object
->get_output_section_offset(got2_shndx
);
5235 gold_assert(got2_addend
!= invalid_address
);
5238 unsigned char* pwrite
= reloc_view
;
5239 bool zap_next
= false;
5240 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
5242 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
5243 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
5246 Reltype
reloc(prelocs
);
5247 Reltype_write
reloc_write(pwrite
);
5249 Address offset
= reloc
.get_r_offset();
5250 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
5251 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
5252 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
5253 const unsigned int orig_r_sym
= r_sym
;
5254 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
5255 = reloc
.get_r_addend();
5256 const Symbol
* gsym
= NULL
;
5260 // We could arrange to discard these and other relocs for
5261 // tls optimised sequences in the strategy methods, but for
5262 // now do as BFD ld does.
5263 r_type
= elfcpp::R_POWERPC_NONE
;
5267 // Get the new symbol index.
5268 if (r_sym
< local_count
)
5272 case Relocatable_relocs::RELOC_COPY
:
5273 case Relocatable_relocs::RELOC_SPECIAL
:
5276 r_sym
= object
->symtab_index(r_sym
);
5277 gold_assert(r_sym
!= -1U);
5281 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
5283 // We are adjusting a section symbol. We need to find
5284 // the symbol table index of the section symbol for
5285 // the output section corresponding to input section
5286 // in which this symbol is defined.
5287 gold_assert(r_sym
< local_count
);
5289 unsigned int shndx
=
5290 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
5291 gold_assert(is_ordinary
);
5292 Output_section
* os
= object
->output_section(shndx
);
5293 gold_assert(os
!= NULL
);
5294 gold_assert(os
->needs_symtab_index());
5295 r_sym
= os
->symtab_index();
5305 gsym
= object
->global_symbol(r_sym
);
5306 gold_assert(gsym
!= NULL
);
5307 if (gsym
->is_forwarder())
5308 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
5310 gold_assert(gsym
->has_symtab_index());
5311 r_sym
= gsym
->symtab_index();
5314 // Get the new offset--the location in the output section where
5315 // this relocation should be applied.
5316 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5317 offset
+= offset_in_output_section
;
5320 section_offset_type sot_offset
=
5321 convert_types
<section_offset_type
, Address
>(offset
);
5322 section_offset_type new_sot_offset
=
5323 output_section
->output_offset(object
, relinfo
->data_shndx
,
5325 gold_assert(new_sot_offset
!= -1);
5326 offset
= new_sot_offset
;
5329 // In an object file, r_offset is an offset within the section.
5330 // In an executable or dynamic object, generated by
5331 // --emit-relocs, r_offset is an absolute address.
5332 if (!parameters
->options().relocatable())
5334 offset
+= view_address
;
5335 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5336 offset
-= offset_in_output_section
;
5339 // Handle the reloc addend based on the strategy.
5340 if (strategy
== Relocatable_relocs::RELOC_COPY
)
5342 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
5344 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
5345 addend
= psymval
->value(object
, addend
);
5347 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
5349 if (addend
>= 32768)
5350 addend
+= got2_addend
;
5355 if (!parameters
->options().relocatable())
5357 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5358 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5359 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5360 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5362 // First instruction of a global dynamic sequence,
5364 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5365 switch (this->optimize_tls_gd(final
))
5367 case tls::TLSOPT_TO_IE
:
5368 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5369 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5371 case tls::TLSOPT_TO_LE
:
5372 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5373 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5374 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5377 r_type
= elfcpp::R_POWERPC_NONE
;
5378 offset
-= 2 * big_endian
;
5385 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5386 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5387 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5388 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5390 // First instruction of a local dynamic sequence,
5392 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5394 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5395 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5397 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5398 const Output_section
* os
= relinfo
->layout
->tls_segment()
5400 gold_assert(os
!= NULL
);
5401 gold_assert(os
->needs_symtab_index());
5402 r_sym
= os
->symtab_index();
5403 addend
= dtp_offset
;
5407 r_type
= elfcpp::R_POWERPC_NONE
;
5408 offset
-= 2 * big_endian
;
5412 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5413 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5414 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5415 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5417 // First instruction of initial exec sequence.
5418 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5419 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5421 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5422 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5423 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5426 r_type
= elfcpp::R_POWERPC_NONE
;
5427 offset
-= 2 * big_endian
;
5431 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5432 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5434 // Second instruction of a global dynamic sequence,
5435 // the __tls_get_addr call
5436 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5437 switch (this->optimize_tls_gd(final
))
5439 case tls::TLSOPT_TO_IE
:
5440 r_type
= elfcpp::R_POWERPC_NONE
;
5443 case tls::TLSOPT_TO_LE
:
5444 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5445 offset
+= 2 * big_endian
;
5452 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5453 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5455 // Second instruction of a local dynamic sequence,
5456 // the __tls_get_addr call
5457 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5459 const Output_section
* os
= relinfo
->layout
->tls_segment()
5461 gold_assert(os
!= NULL
);
5462 gold_assert(os
->needs_symtab_index());
5463 r_sym
= os
->symtab_index();
5464 addend
= dtp_offset
;
5465 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5466 offset
+= 2 * big_endian
;
5470 else if (r_type
== elfcpp::R_POWERPC_TLS
)
5472 // Second instruction of an initial exec sequence
5473 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5474 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5476 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5477 offset
+= 2 * big_endian
;
5482 reloc_write
.put_r_offset(offset
);
5483 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
5484 reloc_write
.put_r_addend(addend
);
5486 pwrite
+= reloc_size
;
5489 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
5490 == reloc_view_size
);
5493 // Return the value to use for a dynamic which requires special
5494 // treatment. This is how we support equality comparisons of function
5495 // pointers across shared library boundaries, as described in the
5496 // processor specific ABI supplement.
5498 template<int size
, bool big_endian
>
5500 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
5504 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
5505 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5506 unsigned int glink_index
= glink
->find_entry(gsym
);
5507 return glink
->address() + glink_index
* glink
->glink_entry_size();
5513 // Return the PLT address to use for a local symbol.
5514 template<int size
, bool big_endian
>
5516 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
5517 const Relobj
* object
,
5518 unsigned int symndx
) const
5522 const Sized_relobj
<size
, big_endian
>* relobj
5523 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
5524 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5525 unsigned int glink_index
= glink
->find_entry(relobj
->sized_relobj(),
5527 return glink
->address() + glink_index
* glink
->glink_entry_size();
5533 // Return the PLT address to use for a global symbol.
5534 template<int size
, bool big_endian
>
5536 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
5537 const Symbol
* gsym
) const
5541 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5542 unsigned int glink_index
= glink
->find_entry(gsym
);
5543 return glink
->address() + glink_index
* glink
->glink_entry_size();
5549 // Return the offset to use for the GOT_INDX'th got entry which is
5550 // for a local tls symbol specified by OBJECT, SYMNDX.
5551 template<int size
, bool big_endian
>
5553 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
5554 const Relobj
* object
,
5555 unsigned int symndx
,
5556 unsigned int got_indx
) const
5558 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5559 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
5560 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
5562 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5563 got_type
<= GOT_TYPE_TPREL
;
5564 got_type
= Got_type(got_type
+ 1))
5565 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
5567 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
5568 if (got_type
== GOT_TYPE_TLSGD
)
5570 if (off
== got_indx
* (size
/ 8))
5572 if (got_type
== GOT_TYPE_TPREL
)
5582 // Return the offset to use for the GOT_INDX'th got entry which is
5583 // for global tls symbol GSYM.
5584 template<int size
, bool big_endian
>
5586 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
5588 unsigned int got_indx
) const
5590 if (gsym
->type() == elfcpp::STT_TLS
)
5592 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5593 got_type
<= GOT_TYPE_TPREL
;
5594 got_type
= Got_type(got_type
+ 1))
5595 if (gsym
->has_got_offset(got_type
))
5597 unsigned int off
= gsym
->got_offset(got_type
);
5598 if (got_type
== GOT_TYPE_TLSGD
)
5600 if (off
== got_indx
* (size
/ 8))
5602 if (got_type
== GOT_TYPE_TPREL
)
5612 // The selector for powerpc object files.
5614 template<int size
, bool big_endian
>
5615 class Target_selector_powerpc
: public Target_selector
5618 Target_selector_powerpc()
5619 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
5621 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
5622 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
5624 ? (big_endian
? "elf64ppc" : "elf64lppc")
5625 : (big_endian
? "elf32ppc" : "elf32lppc")))
5629 do_recognize(Input_file
*, off_t
, int machine
, int, int)
5634 if (machine
!= elfcpp::EM_PPC64
)
5639 if (machine
!= elfcpp::EM_PPC
)
5647 return this->instantiate_target();
5651 do_instantiate_target()
5652 { return new Target_powerpc
<size
, big_endian
>(); }
5655 Target_selector_powerpc
<32, true> target_selector_ppc32
;
5656 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
5657 Target_selector_powerpc
<64, true> target_selector_ppc64
;
5658 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
5660 } // End anonymous namespace.