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 a weak hidden _GLOBAL_OFFSET_TABLE_ to ensure it isn't
1395 // seen as 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 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1578 Symbol_table::PREDEFINED
,
1579 this, this->g_o_t(), 0,
1586 Output_data_got
<size
, big_endian
>::add_constant(0);
1589 // Stashed pointers.
1590 Symbol_table
* symtab_
;
1594 unsigned int header_ent_cnt_
;
1595 // GOT header index.
1596 unsigned int header_index_
;
1599 // Get the GOT section, creating it if necessary.
1601 template<int size
, bool big_endian
>
1602 Output_data_got_powerpc
<size
, big_endian
>*
1603 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1606 if (this->got_
== NULL
)
1608 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1611 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1613 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1614 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1615 this->got_
, ORDER_DATA
, false);
1621 // Get the dynamic reloc section, creating it if necessary.
1623 template<int size
, bool big_endian
>
1624 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1625 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1627 if (this->rela_dyn_
== NULL
)
1629 gold_assert(layout
!= NULL
);
1630 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1631 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1632 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1633 ORDER_DYNAMIC_RELOCS
, false);
1635 return this->rela_dyn_
;
1638 // A class to handle the PLT data.
1640 template<int size
, bool big_endian
>
1641 class Output_data_plt_powerpc
: public Output_section_data_build
1644 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
1645 size
, big_endian
> Reloc_section
;
1647 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
1648 Reloc_section
* plt_rel
,
1649 unsigned int reserved_size
,
1651 : Output_section_data_build(size
== 32 ? 4 : 8),
1654 initial_plt_entry_size_(reserved_size
),
1658 // Add an entry to the PLT.
1663 add_ifunc_entry(Symbol
*);
1666 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
1668 // Return the .rela.plt section data.
1675 // Return the number of PLT entries.
1679 return ((this->current_data_size() - this->initial_plt_entry_size_
)
1683 // Return the offset of the first non-reserved PLT entry.
1685 first_plt_entry_offset()
1686 { return this->initial_plt_entry_size_
; }
1688 // Return the size of a PLT entry.
1690 get_plt_entry_size()
1691 { return plt_entry_size
; }
1695 do_adjust_output_section(Output_section
* os
)
1700 // Write to a map file.
1702 do_print_to_mapfile(Mapfile
* mapfile
) const
1703 { mapfile
->print_output_data(this, this->name_
); }
1706 // The size of an entry in the PLT.
1707 static const int plt_entry_size
= size
== 32 ? 4 : 24;
1709 // Write out the PLT data.
1711 do_write(Output_file
*);
1713 // The reloc section.
1714 Reloc_section
* rel_
;
1715 // Allows access to .glink for do_write.
1716 Target_powerpc
<size
, big_endian
>* targ_
;
1717 // The size of the first reserved entry.
1718 int initial_plt_entry_size_
;
1719 // What to report in map file.
1723 // Add an entry to the PLT.
1725 template<int size
, bool big_endian
>
1727 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
1729 if (!gsym
->has_plt_offset())
1731 off_t off
= this->current_data_size();
1733 off
+= this->first_plt_entry_offset();
1734 gsym
->set_plt_offset(off
);
1735 gsym
->set_needs_dynsym_entry();
1736 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
1737 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
1738 off
+= plt_entry_size
;
1739 this->set_current_data_size(off
);
1743 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
1745 template<int size
, bool big_endian
>
1747 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
1749 if (!gsym
->has_plt_offset())
1751 off_t off
= this->current_data_size();
1752 gsym
->set_plt_offset(off
);
1753 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1755 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1756 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
1757 off
+= plt_entry_size
;
1758 this->set_current_data_size(off
);
1762 // Add an entry for a local ifunc symbol to the IPLT.
1764 template<int size
, bool big_endian
>
1766 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
1767 Sized_relobj_file
<size
, big_endian
>* relobj
,
1768 unsigned int local_sym_index
)
1770 if (!relobj
->local_has_plt_offset(local_sym_index
))
1772 off_t off
= this->current_data_size();
1773 relobj
->set_local_plt_offset(local_sym_index
, off
);
1774 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1776 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1777 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
1779 off
+= plt_entry_size
;
1780 this->set_current_data_size(off
);
1784 static const uint32_t add_0_11_11
= 0x7c0b5a14;
1785 static const uint32_t add_3_3_2
= 0x7c631214;
1786 static const uint32_t add_3_3_13
= 0x7c636a14;
1787 static const uint32_t add_11_0_11
= 0x7d605a14;
1788 static const uint32_t add_12_2_11
= 0x7d825a14;
1789 static const uint32_t addi_11_11
= 0x396b0000;
1790 static const uint32_t addi_12_12
= 0x398c0000;
1791 static const uint32_t addi_2_2
= 0x38420000;
1792 static const uint32_t addi_3_2
= 0x38620000;
1793 static const uint32_t addi_3_3
= 0x38630000;
1794 static const uint32_t addis_0_2
= 0x3c020000;
1795 static const uint32_t addis_0_13
= 0x3c0d0000;
1796 static const uint32_t addis_11_11
= 0x3d6b0000;
1797 static const uint32_t addis_11_30
= 0x3d7e0000;
1798 static const uint32_t addis_12_12
= 0x3d8c0000;
1799 static const uint32_t addis_12_2
= 0x3d820000;
1800 static const uint32_t addis_3_2
= 0x3c620000;
1801 static const uint32_t addis_3_13
= 0x3c6d0000;
1802 static const uint32_t b
= 0x48000000;
1803 static const uint32_t bcl_20_31
= 0x429f0005;
1804 static const uint32_t bctr
= 0x4e800420;
1805 static const uint32_t blr
= 0x4e800020;
1806 static const uint32_t blrl
= 0x4e800021;
1807 static const uint32_t cror_15_15_15
= 0x4def7b82;
1808 static const uint32_t cror_31_31_31
= 0x4ffffb82;
1809 static const uint32_t ld_0_1
= 0xe8010000;
1810 static const uint32_t ld_0_12
= 0xe80c0000;
1811 static const uint32_t ld_11_12
= 0xe96c0000;
1812 static const uint32_t ld_11_2
= 0xe9620000;
1813 static const uint32_t ld_2_1
= 0xe8410000;
1814 static const uint32_t ld_2_11
= 0xe84b0000;
1815 static const uint32_t ld_2_12
= 0xe84c0000;
1816 static const uint32_t ld_2_2
= 0xe8420000;
1817 static const uint32_t lfd_0_1
= 0xc8010000;
1818 static const uint32_t li_0_0
= 0x38000000;
1819 static const uint32_t li_12_0
= 0x39800000;
1820 static const uint32_t lis_0_0
= 0x3c000000;
1821 static const uint32_t lis_11
= 0x3d600000;
1822 static const uint32_t lis_12
= 0x3d800000;
1823 static const uint32_t lwz_0_12
= 0x800c0000;
1824 static const uint32_t lwz_11_11
= 0x816b0000;
1825 static const uint32_t lwz_11_30
= 0x817e0000;
1826 static const uint32_t lwz_12_12
= 0x818c0000;
1827 static const uint32_t lwzu_0_12
= 0x840c0000;
1828 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
1829 static const uint32_t mflr_0
= 0x7c0802a6;
1830 static const uint32_t mflr_11
= 0x7d6802a6;
1831 static const uint32_t mflr_12
= 0x7d8802a6;
1832 static const uint32_t mtctr_0
= 0x7c0903a6;
1833 static const uint32_t mtctr_11
= 0x7d6903a6;
1834 static const uint32_t mtlr_0
= 0x7c0803a6;
1835 static const uint32_t mtlr_12
= 0x7d8803a6;
1836 static const uint32_t nop
= 0x60000000;
1837 static const uint32_t ori_0_0_0
= 0x60000000;
1838 static const uint32_t std_0_1
= 0xf8010000;
1839 static const uint32_t std_0_12
= 0xf80c0000;
1840 static const uint32_t std_2_1
= 0xf8410000;
1841 static const uint32_t stfd_0_1
= 0xd8010000;
1842 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
1843 static const uint32_t sub_11_11_12
= 0x7d6c5850;
1845 // Write out the PLT.
1847 template<int size
, bool big_endian
>
1849 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
1853 const off_t offset
= this->offset();
1854 const section_size_type oview_size
1855 = convert_to_section_size_type(this->data_size());
1856 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1857 unsigned char* pov
= oview
;
1858 unsigned char* endpov
= oview
+ oview_size
;
1860 // The address of the .glink branch table
1861 const Output_data_glink
<size
, big_endian
>* glink
1862 = this->targ_
->glink_section();
1863 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
1864 = glink
->address() + glink
->pltresolve();
1866 while (pov
< endpov
)
1868 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
1873 of
->write_output_view(offset
, oview_size
, oview
);
1877 // Create the PLT section.
1879 template<int size
, bool big_endian
>
1881 Target_powerpc
<size
, big_endian
>::make_plt_section(Layout
* layout
)
1883 if (this->plt_
== NULL
)
1885 if (this->glink_
== NULL
)
1886 make_glink_section(layout
);
1888 // Ensure that .rela.dyn always appears before .rela.plt This is
1889 // necessary due to how, on PowerPC and some other targets, .rela.dyn
1890 // needs to include .rela.plt in it's range.
1891 this->rela_dyn_section(layout
);
1893 Reloc_section
* plt_rel
= new Reloc_section(false);
1894 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
1895 elfcpp::SHF_ALLOC
, plt_rel
,
1896 ORDER_DYNAMIC_PLT_RELOCS
, false);
1898 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
1899 size
== 32 ? 0 : 24,
1901 layout
->add_output_section_data(".plt",
1903 ? elfcpp::SHT_PROGBITS
1904 : elfcpp::SHT_NOBITS
),
1905 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1914 // Create the IPLT section.
1916 template<int size
, bool big_endian
>
1918 Target_powerpc
<size
, big_endian
>::make_iplt_section(Layout
* layout
)
1920 if (this->iplt_
== NULL
)
1922 this->make_plt_section(layout
);
1924 Reloc_section
* iplt_rel
= new Reloc_section(false);
1925 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
1927 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
1929 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
1933 // A class to handle .glink.
1935 template<int size
, bool big_endian
>
1936 class Output_data_glink
: public Output_section_data
1939 static const int pltresolve_size
= 16*4;
1941 Output_data_glink(Target_powerpc
<size
, big_endian
>*);
1945 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1947 const elfcpp::Rela
<size
, big_endian
>&);
1950 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1952 const elfcpp::Rela
<size
, big_endian
>&);
1955 find_entry(const Symbol
*) const;
1958 find_entry(const Sized_relobj_file
<size
, big_endian
>*, unsigned int) const;
1961 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1963 const elfcpp::Rela
<size
, big_endian
>&) const;
1966 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1968 const elfcpp::Rela
<size
, big_endian
>&) const;
1971 glink_entry_size() const
1976 // FIXME: We should be using multiple glink sections for
1977 // stubs to support > 33M applications.
1984 return this->pltresolve_
;
1988 // Write to a map file.
1990 do_print_to_mapfile(Mapfile
* mapfile
) const
1991 { mapfile
->print_output_data(this, _("** glink")); }
1995 set_final_data_size();
1999 do_write(Output_file
*);
2004 Glink_sym_ent(const Symbol
* sym
)
2005 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2008 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2009 unsigned int locsym_index
)
2010 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2013 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2015 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2016 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2019 this->addend_
= reloc
.get_r_addend();
2020 else if (parameters
->options().output_is_position_independent()
2021 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2022 == elfcpp::R_PPC_PLTREL24
))
2024 this->addend_
= reloc
.get_r_addend();
2025 if (this->addend_
>= 32768)
2026 this->object_
= object
;
2030 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2031 unsigned int locsym_index
,
2032 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2033 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2036 this->addend_
= reloc
.get_r_addend();
2037 else if (parameters
->options().output_is_position_independent()
2038 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2039 == elfcpp::R_PPC_PLTREL24
))
2040 this->addend_
= reloc
.get_r_addend();
2043 bool operator==(const Glink_sym_ent
& that
) const
2045 return (this->sym_
== that
.sym_
2046 && this->object_
== that
.object_
2047 && this->addend_
== that
.addend_
2048 && this->locsym_
== that
.locsym_
);
2052 const Sized_relobj_file
<size
, big_endian
>* object_
;
2053 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
2054 unsigned int locsym_
;
2057 class Glink_sym_ent_hash
2060 size_t operator()(const Glink_sym_ent
& ent
) const
2062 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
2063 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
2069 // Map sym/object/addend to index.
2070 typedef Unordered_map
<Glink_sym_ent
, unsigned int,
2071 Glink_sym_ent_hash
> Glink_entries
;
2072 Glink_entries glink_entries_
;
2074 // Offset of pltresolve stub (actually, branch table for 32-bit)
2077 // Allows access to .got and .plt for do_write.
2078 Target_powerpc
<size
, big_endian
>* targ_
;
2081 // Create the glink section.
2083 template<int size
, bool big_endian
>
2084 Output_data_glink
<size
, big_endian
>::Output_data_glink(
2085 Target_powerpc
<size
, big_endian
>* targ
)
2086 : Output_section_data(16),
2087 pltresolve_(0), targ_(targ
)
2091 // Add an entry to glink, if we do not already have one for this
2092 // sym/object/addend combo.
2094 template<int size
, bool big_endian
>
2096 Output_data_glink
<size
, big_endian
>::add_entry(
2097 const Sized_relobj_file
<size
, big_endian
>* object
,
2099 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2101 Glink_sym_ent
ent(object
, gsym
, reloc
);
2102 unsigned int indx
= this->glink_entries_
.size();
2103 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
2106 template<int size
, bool big_endian
>
2108 Output_data_glink
<size
, big_endian
>::add_entry(
2109 const Sized_relobj_file
<size
, big_endian
>* object
,
2110 unsigned int locsym_index
,
2111 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2113 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
2114 unsigned int indx
= this->glink_entries_
.size();
2115 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
2118 template<int size
, bool big_endian
>
2120 Output_data_glink
<size
, big_endian
>::find_entry(
2121 const Sized_relobj_file
<size
, big_endian
>* object
,
2123 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2125 Glink_sym_ent
ent(object
, gsym
, reloc
);
2126 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2127 gold_assert(p
!= this->glink_entries_
.end());
2131 template<int size
, bool big_endian
>
2133 Output_data_glink
<size
, big_endian
>::find_entry(const Symbol
* gsym
) const
2135 Glink_sym_ent
ent(gsym
);
2136 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2137 gold_assert(p
!= this->glink_entries_
.end());
2141 template<int size
, bool big_endian
>
2143 Output_data_glink
<size
, big_endian
>::find_entry(
2144 const Sized_relobj_file
<size
, big_endian
>* object
,
2145 unsigned int locsym_index
,
2146 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2148 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
2149 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2150 gold_assert(p
!= this->glink_entries_
.end());
2154 template<int size
, bool big_endian
>
2156 Output_data_glink
<size
, big_endian
>::find_entry(
2157 const Sized_relobj_file
<size
, big_endian
>* object
,
2158 unsigned int locsym_index
) const
2160 Glink_sym_ent
ent(object
, locsym_index
);
2161 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2162 gold_assert(p
!= this->glink_entries_
.end());
2166 template<int size
, bool big_endian
>
2168 Output_data_glink
<size
, big_endian
>::set_final_data_size()
2170 unsigned int count
= this->glink_entries_
.size();
2171 off_t total
= count
;
2178 this->pltresolve_
= total
;
2180 // space for branch table
2181 total
+= 4 * (count
- 1);
2183 total
+= -total
& 15;
2184 total
+= this->pltresolve_size
;
2189 this->pltresolve_
= total
;
2190 total
+= this->pltresolve_size
;
2192 // space for branch table
2195 total
+= 4 * (count
- 0x8000);
2199 this->set_data_size(total
);
2202 static inline uint32_t
2208 static inline uint32_t
2214 static inline uint32_t
2217 return hi(a
+ 0x8000);
2220 template<bool big_endian
>
2222 write_insn(unsigned char* p
, uint32_t v
)
2224 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2227 // Write out .glink.
2229 template<int size
, bool big_endian
>
2231 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
2233 const off_t off
= this->offset();
2234 const section_size_type oview_size
=
2235 convert_to_section_size_type(this->data_size());
2236 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2239 // The base address of the .plt section.
2240 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2241 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2242 Address plt_base
= this->targ_
->plt_section()->address();
2243 Address iplt_base
= invalid_address
;
2245 const Output_data_got_powerpc
<size
, big_endian
>* got
2246 = this->targ_
->got_section();
2250 Address got_os_addr
= got
->output_section()->address();
2252 // Write out call stubs.
2253 typename
Glink_entries::const_iterator g
;
2254 for (g
= this->glink_entries_
.begin();
2255 g
!= this->glink_entries_
.end();
2260 const Symbol
* gsym
= g
->first
.sym_
;
2263 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2264 && gsym
->can_use_relative_reloc(false));
2265 plt_addr
= gsym
->plt_offset();
2270 const Sized_relobj_file
<size
, big_endian
>* relobj
2272 unsigned int local_sym_index
= g
->first
.locsym_
;
2273 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2277 if (iplt_base
== invalid_address
)
2278 iplt_base
= this->targ_
->iplt_section()->address();
2279 plt_addr
+= iplt_base
;
2282 plt_addr
+= plt_base
;
2283 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2284 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2285 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
2286 Address pltoff
= plt_addr
- got_addr
;
2288 if (pltoff
+ 0x80008000 > 0xffffffff || (pltoff
& 7) != 0)
2289 gold_error(_("%s: linkage table error against `%s'"),
2290 g
->first
.object_
->name().c_str(),
2291 g
->first
.sym_
->demangled_name().c_str());
2293 p
= oview
+ g
->second
* this->glink_entry_size();
2294 if (ha(pltoff
) != 0)
2296 write_insn
<big_endian
>(p
, addis_12_2
+ ha(pltoff
)), p
+= 4;
2297 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2298 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
)), p
+= 4;
2299 if (ha(pltoff
+ 16) != ha(pltoff
))
2301 write_insn
<big_endian
>(p
, addi_12_12
+ l(pltoff
)), p
+= 4;
2304 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2305 write_insn
<big_endian
>(p
, ld_2_12
+ l(pltoff
+ 8)), p
+= 4;
2306 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
+ 16)), p
+= 4;
2307 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2311 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2312 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
)), p
+= 4;
2313 if (ha(pltoff
+ 16) != ha(pltoff
))
2315 write_insn
<big_endian
>(p
, addi_2_2
+ l(pltoff
)), p
+= 4;
2318 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2319 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
+ 16)), p
+= 4;
2320 write_insn
<big_endian
>(p
, ld_2_2
+ l(pltoff
+ 8)), p
+= 4;
2321 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2325 // Write pltresolve stub.
2326 p
= oview
+ this->pltresolve_
;
2327 Address after_bcl
= this->address() + this->pltresolve_
+ 16;
2328 Address pltoff
= plt_base
- after_bcl
;
2330 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
2332 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
2333 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
2334 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
2335 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
2336 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
2337 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
2338 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
2339 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
2340 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2341 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
2342 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2343 while (p
< oview
+ this->pltresolve_
+ this->pltresolve_size
)
2344 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2346 // Write lazy link call stubs.
2348 while (p
< oview
+ oview_size
)
2352 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
2356 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
2357 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
2359 uint32_t branch_off
= this->pltresolve_
+ 8 - (p
- oview
);
2360 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
2366 // The address of _GLOBAL_OFFSET_TABLE_.
2367 Address g_o_t
= got
->address() + got
->g_o_t();
2369 // Write out call stubs.
2370 typename
Glink_entries::const_iterator g
;
2371 for (g
= this->glink_entries_
.begin();
2372 g
!= this->glink_entries_
.end();
2377 const Symbol
* gsym
= g
->first
.sym_
;
2380 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2381 && gsym
->can_use_relative_reloc(false));
2382 plt_addr
= gsym
->plt_offset();
2387 const Sized_relobj_file
<size
, big_endian
>* relobj
2389 unsigned int local_sym_index
= g
->first
.locsym_
;
2390 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2394 if (iplt_base
== invalid_address
)
2395 iplt_base
= this->targ_
->iplt_section()->address();
2396 plt_addr
+= iplt_base
;
2399 plt_addr
+= plt_base
;
2401 p
= oview
+ g
->second
* this->glink_entry_size();
2402 if (parameters
->options().output_is_position_independent())
2405 const Powerpc_relobj
<size
, big_endian
>* object
= static_cast
2406 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2407 if (object
!= NULL
&& g
->first
.addend_
>= 32768)
2409 unsigned int got2
= object
->got2_shndx();
2410 got_addr
= g
->first
.object_
->get_output_section_offset(got2
);
2411 gold_assert(got_addr
!= invalid_address
);
2412 got_addr
+= (g
->first
.object_
->output_section(got2
)->address()
2413 + g
->first
.addend_
);
2418 Address pltoff
= plt_addr
- got_addr
;
2419 if (ha(pltoff
) == 0)
2421 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(pltoff
));
2422 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
2423 write_insn
<big_endian
>(p
+ 8, bctr
);
2427 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(pltoff
));
2428 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(pltoff
));
2429 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2430 write_insn
<big_endian
>(p
+ 12, bctr
);
2435 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
2436 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
2437 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2438 write_insn
<big_endian
>(p
+ 12, bctr
);
2442 // Write out pltresolve branch table.
2443 p
= oview
+ this->pltresolve_
;
2444 unsigned int the_end
= oview_size
- this->pltresolve_size
;
2445 unsigned char* end_p
= oview
+ the_end
;
2446 while (p
< end_p
- 8 * 4)
2447 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
2449 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2451 // Write out pltresolve call stub.
2452 if (parameters
->options().output_is_position_independent())
2454 Address res0_off
= this->pltresolve_
;
2455 Address after_bcl_off
= the_end
+ 12;
2456 Address bcl_res0
= after_bcl_off
- res0_off
;
2458 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
2459 write_insn
<big_endian
>(p
+ 4, mflr_0
);
2460 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
2461 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
2462 write_insn
<big_endian
>(p
+ 16, mflr_12
);
2463 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
2464 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
2466 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
2468 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
2469 if (ha(got_bcl
) == ha(got_bcl
+ 4))
2471 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
2472 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
2476 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
2477 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
2479 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
2480 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
2481 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
2482 write_insn
<big_endian
>(p
+ 52, bctr
);
2483 write_insn
<big_endian
>(p
+ 56, nop
);
2484 write_insn
<big_endian
>(p
+ 60, nop
);
2488 Address res0
= this->pltresolve_
+ this->address();
2490 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
2491 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
2492 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2493 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
2495 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
2496 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
2497 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
2498 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
2499 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2500 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
2502 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
2503 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
2504 write_insn
<big_endian
>(p
+ 32, bctr
);
2505 write_insn
<big_endian
>(p
+ 36, nop
);
2506 write_insn
<big_endian
>(p
+ 40, nop
);
2507 write_insn
<big_endian
>(p
+ 44, nop
);
2508 write_insn
<big_endian
>(p
+ 48, nop
);
2509 write_insn
<big_endian
>(p
+ 52, nop
);
2510 write_insn
<big_endian
>(p
+ 56, nop
);
2511 write_insn
<big_endian
>(p
+ 60, nop
);
2516 of
->write_output_view(off
, oview_size
, oview
);
2520 // A class to handle linker generated save/restore functions.
2522 template<int size
, bool big_endian
>
2523 class Output_data_save_res
: public Output_section_data_build
2526 Output_data_save_res(Symbol_table
* symtab
);
2529 // Write to a map file.
2531 do_print_to_mapfile(Mapfile
* mapfile
) const
2532 { mapfile
->print_output_data(this, _("** save/restore")); }
2535 do_write(Output_file
*);
2538 // The maximum size of save/restore contents.
2539 static const unsigned int savres_max
= 218*4;
2542 savres_define(Symbol_table
* symtab
,
2544 unsigned int lo
, unsigned int hi
,
2545 unsigned char* write_ent(unsigned char*, int),
2546 unsigned char* write_tail(unsigned char*, int));
2548 unsigned char *contents_
;
2551 template<bool big_endian
>
2552 static unsigned char*
2553 savegpr0(unsigned char* p
, int r
)
2555 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2556 write_insn
<big_endian
>(p
, insn
);
2560 template<bool big_endian
>
2561 static unsigned char*
2562 savegpr0_tail(unsigned char* p
, int r
)
2564 p
= savegpr0
<big_endian
>(p
, r
);
2565 uint32_t insn
= std_0_1
+ 16;
2566 write_insn
<big_endian
>(p
, insn
);
2568 write_insn
<big_endian
>(p
, blr
);
2572 template<bool big_endian
>
2573 static unsigned char*
2574 restgpr0(unsigned char* p
, int r
)
2576 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2577 write_insn
<big_endian
>(p
, insn
);
2581 template<bool big_endian
>
2582 static unsigned char*
2583 restgpr0_tail(unsigned char* p
, int r
)
2585 uint32_t insn
= ld_0_1
+ 16;
2586 write_insn
<big_endian
>(p
, insn
);
2588 p
= restgpr0
<big_endian
>(p
, r
);
2589 write_insn
<big_endian
>(p
, mtlr_0
);
2593 p
= restgpr0
<big_endian
>(p
, 30);
2594 p
= restgpr0
<big_endian
>(p
, 31);
2596 write_insn
<big_endian
>(p
, blr
);
2600 template<bool big_endian
>
2601 static unsigned char*
2602 savegpr1(unsigned char* p
, int r
)
2604 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2605 write_insn
<big_endian
>(p
, insn
);
2609 template<bool big_endian
>
2610 static unsigned char*
2611 savegpr1_tail(unsigned char* p
, int r
)
2613 p
= savegpr1
<big_endian
>(p
, r
);
2614 write_insn
<big_endian
>(p
, blr
);
2618 template<bool big_endian
>
2619 static unsigned char*
2620 restgpr1(unsigned char* p
, int r
)
2622 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2623 write_insn
<big_endian
>(p
, insn
);
2627 template<bool big_endian
>
2628 static unsigned char*
2629 restgpr1_tail(unsigned char* p
, int r
)
2631 p
= restgpr1
<big_endian
>(p
, r
);
2632 write_insn
<big_endian
>(p
, blr
);
2636 template<bool big_endian
>
2637 static unsigned char*
2638 savefpr(unsigned char* p
, int r
)
2640 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2641 write_insn
<big_endian
>(p
, insn
);
2645 template<bool big_endian
>
2646 static unsigned char*
2647 savefpr0_tail(unsigned char* p
, int r
)
2649 p
= savefpr
<big_endian
>(p
, r
);
2650 write_insn
<big_endian
>(p
, std_0_1
+ 16);
2652 write_insn
<big_endian
>(p
, blr
);
2656 template<bool big_endian
>
2657 static unsigned char*
2658 restfpr(unsigned char* p
, int r
)
2660 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2661 write_insn
<big_endian
>(p
, insn
);
2665 template<bool big_endian
>
2666 static unsigned char*
2667 restfpr0_tail(unsigned char* p
, int r
)
2669 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
2671 p
= restfpr
<big_endian
>(p
, r
);
2672 write_insn
<big_endian
>(p
, mtlr_0
);
2676 p
= restfpr
<big_endian
>(p
, 30);
2677 p
= restfpr
<big_endian
>(p
, 31);
2679 write_insn
<big_endian
>(p
, blr
);
2683 template<bool big_endian
>
2684 static unsigned char*
2685 savefpr1_tail(unsigned char* p
, int r
)
2687 p
= savefpr
<big_endian
>(p
, r
);
2688 write_insn
<big_endian
>(p
, blr
);
2692 template<bool big_endian
>
2693 static unsigned char*
2694 restfpr1_tail(unsigned char* p
, int r
)
2696 p
= restfpr
<big_endian
>(p
, r
);
2697 write_insn
<big_endian
>(p
, blr
);
2701 template<bool big_endian
>
2702 static unsigned char*
2703 savevr(unsigned char* p
, int r
)
2705 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2706 write_insn
<big_endian
>(p
, insn
);
2708 insn
= stvx_0_12_0
+ (r
<< 21);
2709 write_insn
<big_endian
>(p
, insn
);
2713 template<bool big_endian
>
2714 static unsigned char*
2715 savevr_tail(unsigned char* p
, int r
)
2717 p
= savevr
<big_endian
>(p
, r
);
2718 write_insn
<big_endian
>(p
, blr
);
2722 template<bool big_endian
>
2723 static unsigned char*
2724 restvr(unsigned char* p
, int r
)
2726 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2727 write_insn
<big_endian
>(p
, insn
);
2729 insn
= lvx_0_12_0
+ (r
<< 21);
2730 write_insn
<big_endian
>(p
, insn
);
2734 template<bool big_endian
>
2735 static unsigned char*
2736 restvr_tail(unsigned char* p
, int r
)
2738 p
= restvr
<big_endian
>(p
, r
);
2739 write_insn
<big_endian
>(p
, blr
);
2744 template<int size
, bool big_endian
>
2745 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
2746 Symbol_table
* symtab
)
2747 : Output_section_data_build(4),
2750 this->savres_define(symtab
,
2751 "_savegpr0_", 14, 31,
2752 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
2753 this->savres_define(symtab
,
2754 "_restgpr0_", 14, 29,
2755 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2756 this->savres_define(symtab
,
2757 "_restgpr0_", 30, 31,
2758 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2759 this->savres_define(symtab
,
2760 "_savegpr1_", 14, 31,
2761 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
2762 this->savres_define(symtab
,
2763 "_restgpr1_", 14, 31,
2764 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
2765 this->savres_define(symtab
,
2766 "_savefpr_", 14, 31,
2767 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
2768 this->savres_define(symtab
,
2769 "_restfpr_", 14, 29,
2770 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2771 this->savres_define(symtab
,
2772 "_restfpr_", 30, 31,
2773 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2774 this->savres_define(symtab
,
2776 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
2777 this->savres_define(symtab
,
2779 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
2780 this->savres_define(symtab
,
2782 savevr
<big_endian
>, savevr_tail
<big_endian
>);
2783 this->savres_define(symtab
,
2785 restvr
<big_endian
>, restvr_tail
<big_endian
>);
2788 template<int size
, bool big_endian
>
2790 Output_data_save_res
<size
, big_endian
>::savres_define(
2791 Symbol_table
* symtab
,
2793 unsigned int lo
, unsigned int hi
,
2794 unsigned char* write_ent(unsigned char*, int),
2795 unsigned char* write_tail(unsigned char*, int))
2797 size_t len
= strlen(name
);
2798 bool writing
= false;
2801 memcpy(sym
, name
, len
);
2804 for (unsigned int i
= lo
; i
<= hi
; i
++)
2806 sym
[len
+ 0] = i
/ 10 + '0';
2807 sym
[len
+ 1] = i
% 10 + '0';
2808 Symbol
* gsym
= symtab
->lookup(sym
);
2809 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
2810 writing
= writing
|| refd
;
2813 if (this->contents_
== NULL
)
2814 this->contents_
= new unsigned char[this->savres_max
];
2816 off_t value
= this->current_data_size();
2817 unsigned char* p
= this->contents_
+ value
;
2819 p
= write_ent(p
, i
);
2821 p
= write_tail(p
, i
);
2822 off_t cur_size
= p
- this->contents_
;
2823 this->set_current_data_size(cur_size
);
2825 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
2826 this, value
, cur_size
- value
,
2827 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
2828 elfcpp::STV_HIDDEN
, 0, false, false);
2833 // Write out save/restore.
2835 template<int size
, bool big_endian
>
2837 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
2839 const off_t off
= this->offset();
2840 const section_size_type oview_size
=
2841 convert_to_section_size_type(this->data_size());
2842 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2843 memcpy(oview
, this->contents_
, oview_size
);
2844 of
->write_output_view(off
, oview_size
, oview
);
2848 // Create the glink section.
2850 template<int size
, bool big_endian
>
2852 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
2854 if (this->glink_
== NULL
)
2856 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
2857 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
2858 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
2859 this->glink_
, ORDER_TEXT
, false);
2863 // Create a PLT entry for a global symbol.
2865 template<int size
, bool big_endian
>
2867 Target_powerpc
<size
, big_endian
>::make_plt_entry(
2870 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2871 const Sized_relobj_file
<size
, big_endian
>* object
)
2873 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
2874 && gsym
->can_use_relative_reloc(false))
2876 if (this->iplt_
== NULL
)
2877 this->make_iplt_section(layout
);
2878 this->iplt_
->add_ifunc_entry(gsym
);
2882 if (this->plt_
== NULL
)
2883 this->make_plt_section(layout
);
2884 this->plt_
->add_entry(gsym
);
2886 this->glink_
->add_entry(object
, gsym
, reloc
);
2889 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
2891 template<int size
, bool big_endian
>
2893 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
2895 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2896 Sized_relobj_file
<size
, big_endian
>* relobj
)
2898 if (this->iplt_
== NULL
)
2899 this->make_iplt_section(layout
);
2900 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2901 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
2902 this->glink_
->add_entry(relobj
, r_sym
, reloc
);
2905 // Return the number of entries in the PLT.
2907 template<int size
, bool big_endian
>
2909 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
2911 if (this->plt_
== NULL
)
2913 unsigned int count
= this->plt_
->entry_count();
2914 if (this->iplt_
!= NULL
)
2915 count
+= this->iplt_
->entry_count();
2919 // Return the offset of the first non-reserved PLT entry.
2921 template<int size
, bool big_endian
>
2923 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
2925 return this->plt_
->first_plt_entry_offset();
2928 // Return the size of each PLT entry.
2930 template<int size
, bool big_endian
>
2932 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
2934 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
2937 // Create a GOT entry for local dynamic __tls_get_addr calls.
2939 template<int size
, bool big_endian
>
2941 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
2942 Symbol_table
* symtab
,
2944 Sized_relobj_file
<size
, big_endian
>* object
)
2946 if (this->tlsld_got_offset_
== -1U)
2948 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
2949 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
2950 Output_data_got_powerpc
<size
, big_endian
>* got
2951 = this->got_section(symtab
, layout
);
2952 unsigned int got_offset
= got
->add_constant_pair(0, 0);
2953 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
2955 this->tlsld_got_offset_
= got_offset
;
2957 return this->tlsld_got_offset_
;
2960 // Get the Reference_flags for a particular relocation.
2962 template<int size
, bool big_endian
>
2964 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
2968 case elfcpp::R_POWERPC_NONE
:
2969 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2970 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2971 case elfcpp::R_PPC64_TOC
:
2972 // No symbol reference.
2975 case elfcpp::R_PPC64_ADDR64
:
2976 case elfcpp::R_PPC64_UADDR64
:
2977 case elfcpp::R_POWERPC_ADDR32
:
2978 case elfcpp::R_POWERPC_UADDR32
:
2979 case elfcpp::R_POWERPC_ADDR16
:
2980 case elfcpp::R_POWERPC_UADDR16
:
2981 case elfcpp::R_POWERPC_ADDR16_LO
:
2982 case elfcpp::R_POWERPC_ADDR16_HI
:
2983 case elfcpp::R_POWERPC_ADDR16_HA
:
2984 return Symbol::ABSOLUTE_REF
;
2986 case elfcpp::R_POWERPC_ADDR24
:
2987 case elfcpp::R_POWERPC_ADDR14
:
2988 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2989 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2990 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
2992 case elfcpp::R_PPC64_REL64
:
2993 case elfcpp::R_POWERPC_REL32
:
2994 case elfcpp::R_PPC_LOCAL24PC
:
2995 case elfcpp::R_POWERPC_REL16
:
2996 case elfcpp::R_POWERPC_REL16_LO
:
2997 case elfcpp::R_POWERPC_REL16_HI
:
2998 case elfcpp::R_POWERPC_REL16_HA
:
2999 return Symbol::RELATIVE_REF
;
3001 case elfcpp::R_POWERPC_REL24
:
3002 case elfcpp::R_PPC_PLTREL24
:
3003 case elfcpp::R_POWERPC_REL14
:
3004 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3005 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3006 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
3008 case elfcpp::R_POWERPC_GOT16
:
3009 case elfcpp::R_POWERPC_GOT16_LO
:
3010 case elfcpp::R_POWERPC_GOT16_HI
:
3011 case elfcpp::R_POWERPC_GOT16_HA
:
3012 case elfcpp::R_PPC64_GOT16_DS
:
3013 case elfcpp::R_PPC64_GOT16_LO_DS
:
3014 case elfcpp::R_PPC64_TOC16
:
3015 case elfcpp::R_PPC64_TOC16_LO
:
3016 case elfcpp::R_PPC64_TOC16_HI
:
3017 case elfcpp::R_PPC64_TOC16_HA
:
3018 case elfcpp::R_PPC64_TOC16_DS
:
3019 case elfcpp::R_PPC64_TOC16_LO_DS
:
3021 return Symbol::ABSOLUTE_REF
;
3023 case elfcpp::R_POWERPC_GOT_TPREL16
:
3024 case elfcpp::R_POWERPC_TLS
:
3025 return Symbol::TLS_REF
;
3027 case elfcpp::R_POWERPC_COPY
:
3028 case elfcpp::R_POWERPC_GLOB_DAT
:
3029 case elfcpp::R_POWERPC_JMP_SLOT
:
3030 case elfcpp::R_POWERPC_RELATIVE
:
3031 case elfcpp::R_POWERPC_DTPMOD
:
3033 // Not expected. We will give an error later.
3038 // Report an unsupported relocation against a local symbol.
3040 template<int size
, bool big_endian
>
3042 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
3043 Sized_relobj_file
<size
, big_endian
>* object
,
3044 unsigned int r_type
)
3046 gold_error(_("%s: unsupported reloc %u against local symbol"),
3047 object
->name().c_str(), r_type
);
3050 // We are about to emit a dynamic relocation of type R_TYPE. If the
3051 // dynamic linker does not support it, issue an error.
3053 template<int size
, bool big_endian
>
3055 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
3056 unsigned int r_type
)
3058 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
3060 // These are the relocation types supported by glibc for both 32-bit
3061 // and 64-bit powerpc.
3064 case elfcpp::R_POWERPC_NONE
:
3065 case elfcpp::R_POWERPC_RELATIVE
:
3066 case elfcpp::R_POWERPC_GLOB_DAT
:
3067 case elfcpp::R_POWERPC_DTPMOD
:
3068 case elfcpp::R_POWERPC_DTPREL
:
3069 case elfcpp::R_POWERPC_TPREL
:
3070 case elfcpp::R_POWERPC_JMP_SLOT
:
3071 case elfcpp::R_POWERPC_COPY
:
3072 case elfcpp::R_POWERPC_IRELATIVE
:
3073 case elfcpp::R_POWERPC_ADDR32
:
3074 case elfcpp::R_POWERPC_UADDR32
:
3075 case elfcpp::R_POWERPC_ADDR24
:
3076 case elfcpp::R_POWERPC_ADDR16
:
3077 case elfcpp::R_POWERPC_UADDR16
:
3078 case elfcpp::R_POWERPC_ADDR16_LO
:
3079 case elfcpp::R_POWERPC_ADDR16_HI
:
3080 case elfcpp::R_POWERPC_ADDR16_HA
:
3081 case elfcpp::R_POWERPC_ADDR14
:
3082 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3083 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3084 case elfcpp::R_POWERPC_REL32
:
3085 case elfcpp::R_POWERPC_REL24
:
3086 case elfcpp::R_POWERPC_TPREL16
:
3087 case elfcpp::R_POWERPC_TPREL16_LO
:
3088 case elfcpp::R_POWERPC_TPREL16_HI
:
3089 case elfcpp::R_POWERPC_TPREL16_HA
:
3100 // These are the relocation types supported only on 64-bit.
3101 case elfcpp::R_PPC64_ADDR64
:
3102 case elfcpp::R_PPC64_UADDR64
:
3103 case elfcpp::R_PPC64_JMP_IREL
:
3104 case elfcpp::R_PPC64_ADDR16_DS
:
3105 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3106 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3107 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3108 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3109 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3110 case elfcpp::R_PPC64_REL64
:
3111 case elfcpp::R_POWERPC_ADDR30
:
3112 case elfcpp::R_PPC64_TPREL16_DS
:
3113 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3114 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3115 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3116 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3117 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3128 // These are the relocation types supported only on 32-bit.
3129 // ??? glibc ld.so doesn't need to support these.
3130 case elfcpp::R_POWERPC_DTPREL16
:
3131 case elfcpp::R_POWERPC_DTPREL16_LO
:
3132 case elfcpp::R_POWERPC_DTPREL16_HI
:
3133 case elfcpp::R_POWERPC_DTPREL16_HA
:
3141 // This prevents us from issuing more than one error per reloc
3142 // section. But we can still wind up issuing more than one
3143 // error per object file.
3144 if (this->issued_non_pic_error_
)
3146 gold_assert(parameters
->options().output_is_position_independent());
3147 object
->error(_("requires unsupported dynamic reloc; "
3148 "recompile with -fPIC"));
3149 this->issued_non_pic_error_
= true;
3153 // Return whether we need to make a PLT entry for a relocation of the
3154 // given type against a STT_GNU_IFUNC symbol.
3156 template<int size
, bool big_endian
>
3158 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
3159 Sized_relobj_file
<size
, big_endian
>* object
,
3160 unsigned int r_type
)
3162 // In non-pic code any reference will resolve to the plt call stub
3163 // for the ifunc symbol.
3164 if (size
== 32 && !parameters
->options().output_is_position_independent())
3169 // Word size refs from data sections are OK.
3170 case elfcpp::R_POWERPC_ADDR32
:
3171 case elfcpp::R_POWERPC_UADDR32
:
3176 case elfcpp::R_PPC64_ADDR64
:
3177 case elfcpp::R_PPC64_UADDR64
:
3182 // GOT refs are good.
3183 case elfcpp::R_POWERPC_GOT16
:
3184 case elfcpp::R_POWERPC_GOT16_LO
:
3185 case elfcpp::R_POWERPC_GOT16_HI
:
3186 case elfcpp::R_POWERPC_GOT16_HA
:
3187 case elfcpp::R_PPC64_GOT16_DS
:
3188 case elfcpp::R_PPC64_GOT16_LO_DS
:
3191 // So are function calls.
3192 case elfcpp::R_POWERPC_ADDR24
:
3193 case elfcpp::R_POWERPC_ADDR14
:
3194 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3195 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3196 case elfcpp::R_POWERPC_REL24
:
3197 case elfcpp::R_PPC_PLTREL24
:
3198 case elfcpp::R_POWERPC_REL14
:
3199 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3200 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3207 // Anything else is a problem.
3208 // If we are building a static executable, the libc startup function
3209 // responsible for applying indirect function relocations is going
3210 // to complain about the reloc type.
3211 // If we are building a dynamic executable, we will have a text
3212 // relocation. The dynamic loader will set the text segment
3213 // writable and non-executable to apply text relocations. So we'll
3214 // segfault when trying to run the indirection function to resolve
3216 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
3217 object
->name().c_str(), r_type
);
3221 // Scan a relocation for a local symbol.
3223 template<int size
, bool big_endian
>
3225 Target_powerpc
<size
, big_endian
>::Scan::local(
3226 Symbol_table
* symtab
,
3228 Target_powerpc
<size
, big_endian
>* target
,
3229 Sized_relobj_file
<size
, big_endian
>* object
,
3230 unsigned int data_shndx
,
3231 Output_section
* output_section
,
3232 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3233 unsigned int r_type
,
3234 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3237 Powerpc_relobj
<size
, big_endian
>* ppc_object
3238 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3243 && data_shndx
== ppc_object
->opd_shndx()
3244 && r_type
== elfcpp::R_PPC64_ADDR64
)
3245 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3249 // A local STT_GNU_IFUNC symbol may require a PLT entry.
3250 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
3251 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
3252 target
->make_local_ifunc_plt_entry(layout
, reloc
, object
);
3256 case elfcpp::R_POWERPC_NONE
:
3257 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3258 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3259 case elfcpp::R_PPC64_TOCSAVE
:
3260 case elfcpp::R_PPC_EMB_MRKREF
:
3261 case elfcpp::R_POWERPC_TLS
:
3264 case elfcpp::R_PPC64_TOC
:
3266 Output_data_got_powerpc
<size
, big_endian
>* got
3267 = target
->got_section(symtab
, layout
);
3268 if (parameters
->options().output_is_position_independent())
3270 Address off
= reloc
.get_r_offset();
3272 && data_shndx
== ppc_object
->opd_shndx()
3273 && ppc_object
->get_opd_discard(off
- 8))
3276 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3277 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3278 rela_dyn
->add_output_section_relative(got
->output_section(),
3279 elfcpp::R_POWERPC_RELATIVE
,
3281 object
, data_shndx
, off
,
3282 symobj
->toc_base_offset());
3287 case elfcpp::R_PPC64_ADDR64
:
3288 case elfcpp::R_PPC64_UADDR64
:
3289 case elfcpp::R_POWERPC_ADDR32
:
3290 case elfcpp::R_POWERPC_UADDR32
:
3291 case elfcpp::R_POWERPC_ADDR24
:
3292 case elfcpp::R_POWERPC_ADDR16
:
3293 case elfcpp::R_POWERPC_ADDR16_LO
:
3294 case elfcpp::R_POWERPC_ADDR16_HI
:
3295 case elfcpp::R_POWERPC_ADDR16_HA
:
3296 case elfcpp::R_POWERPC_UADDR16
:
3297 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3298 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3299 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3300 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3301 case elfcpp::R_PPC64_ADDR16_DS
:
3302 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3303 case elfcpp::R_POWERPC_ADDR14
:
3304 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3305 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3306 // If building a shared library (or a position-independent
3307 // executable), we need to create a dynamic relocation for
3309 if (parameters
->options().output_is_position_independent()
3310 || (size
== 64 && is_ifunc
))
3312 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3314 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
3315 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
3317 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3318 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3321 rela_dyn
= target
->iplt_section()->rel_plt();
3322 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3324 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3325 output_section
, data_shndx
,
3326 reloc
.get_r_offset(),
3327 reloc
.get_r_addend(), false);
3331 check_non_pic(object
, r_type
);
3332 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3333 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
3334 data_shndx
, reloc
.get_r_offset(),
3335 reloc
.get_r_addend());
3340 case elfcpp::R_PPC64_REL64
:
3341 case elfcpp::R_POWERPC_REL32
:
3342 case elfcpp::R_POWERPC_REL24
:
3343 case elfcpp::R_PPC_PLTREL24
:
3344 case elfcpp::R_PPC_LOCAL24PC
:
3345 case elfcpp::R_POWERPC_REL16
:
3346 case elfcpp::R_POWERPC_REL16_LO
:
3347 case elfcpp::R_POWERPC_REL16_HI
:
3348 case elfcpp::R_POWERPC_REL16_HA
:
3349 case elfcpp::R_POWERPC_REL14
:
3350 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3351 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3352 case elfcpp::R_POWERPC_SECTOFF
:
3353 case elfcpp::R_POWERPC_TPREL16
:
3354 case elfcpp::R_POWERPC_DTPREL16
:
3355 case elfcpp::R_POWERPC_SECTOFF_LO
:
3356 case elfcpp::R_POWERPC_TPREL16_LO
:
3357 case elfcpp::R_POWERPC_DTPREL16_LO
:
3358 case elfcpp::R_POWERPC_SECTOFF_HI
:
3359 case elfcpp::R_POWERPC_TPREL16_HI
:
3360 case elfcpp::R_POWERPC_DTPREL16_HI
:
3361 case elfcpp::R_POWERPC_SECTOFF_HA
:
3362 case elfcpp::R_POWERPC_TPREL16_HA
:
3363 case elfcpp::R_POWERPC_DTPREL16_HA
:
3364 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3365 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3366 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3367 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3368 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3369 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3370 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3371 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3372 case elfcpp::R_PPC64_TPREL16_DS
:
3373 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3374 case elfcpp::R_PPC64_DTPREL16_DS
:
3375 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3376 case elfcpp::R_PPC64_SECTOFF_DS
:
3377 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3378 case elfcpp::R_PPC64_TLSGD
:
3379 case elfcpp::R_PPC64_TLSLD
:
3382 case elfcpp::R_POWERPC_GOT16
:
3383 case elfcpp::R_POWERPC_GOT16_LO
:
3384 case elfcpp::R_POWERPC_GOT16_HI
:
3385 case elfcpp::R_POWERPC_GOT16_HA
:
3386 case elfcpp::R_PPC64_GOT16_DS
:
3387 case elfcpp::R_PPC64_GOT16_LO_DS
:
3389 // The symbol requires a GOT entry.
3390 Output_data_got_powerpc
<size
, big_endian
>* got
3391 = target
->got_section(symtab
, layout
);
3392 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3394 if (!parameters
->options().output_is_position_independent())
3396 if (size
== 32 && is_ifunc
)
3397 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
3399 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
3401 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
3403 // If we are generating a shared object or a pie, this
3404 // symbol's GOT entry will be set by a dynamic relocation.
3406 off
= got
->add_constant(0);
3407 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
3409 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3410 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3413 rela_dyn
= target
->iplt_section()->rel_plt();
3414 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3416 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3417 got
, off
, 0, false);
3422 case elfcpp::R_PPC64_TOC16
:
3423 case elfcpp::R_PPC64_TOC16_LO
:
3424 case elfcpp::R_PPC64_TOC16_HI
:
3425 case elfcpp::R_PPC64_TOC16_HA
:
3426 case elfcpp::R_PPC64_TOC16_DS
:
3427 case elfcpp::R_PPC64_TOC16_LO_DS
:
3428 // We need a GOT section.
3429 target
->got_section(symtab
, layout
);
3432 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3433 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3434 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3435 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3437 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
3438 if (tls_type
== tls::TLSOPT_NONE
)
3440 Output_data_got_powerpc
<size
, big_endian
>* got
3441 = target
->got_section(symtab
, layout
);
3442 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3443 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3444 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
3445 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
3447 else if (tls_type
== tls::TLSOPT_TO_LE
)
3449 // no GOT relocs needed for Local Exec.
3456 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3457 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3458 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3459 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3461 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3462 if (tls_type
== tls::TLSOPT_NONE
)
3463 target
->tlsld_got_offset(symtab
, layout
, object
);
3464 else if (tls_type
== tls::TLSOPT_TO_LE
)
3466 // no GOT relocs needed for Local Exec.
3467 if (parameters
->options().emit_relocs())
3469 Output_section
* os
= layout
->tls_segment()->first_section();
3470 gold_assert(os
!= NULL
);
3471 os
->set_needs_symtab_index();
3479 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3480 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3481 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3482 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3484 Output_data_got_powerpc
<size
, big_endian
>* got
3485 = target
->got_section(symtab
, layout
);
3486 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3487 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
3491 case elfcpp::R_POWERPC_GOT_TPREL16
:
3492 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3493 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3494 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3496 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
3497 if (tls_type
== tls::TLSOPT_NONE
)
3499 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3500 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
3502 Output_data_got_powerpc
<size
, big_endian
>* got
3503 = target
->got_section(symtab
, layout
);
3504 unsigned int off
= got
->add_constant(0);
3505 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
3507 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3508 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
3509 elfcpp::R_POWERPC_TPREL
,
3513 else if (tls_type
== tls::TLSOPT_TO_LE
)
3515 // no GOT relocs needed for Local Exec.
3523 unsupported_reloc_local(object
, r_type
);
3528 // Report an unsupported relocation against a global symbol.
3530 template<int size
, bool big_endian
>
3532 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
3533 Sized_relobj_file
<size
, big_endian
>* object
,
3534 unsigned int r_type
,
3537 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
3538 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
3541 // Scan a relocation for a global symbol.
3543 template<int size
, bool big_endian
>
3545 Target_powerpc
<size
, big_endian
>::Scan::global(
3546 Symbol_table
* symtab
,
3548 Target_powerpc
<size
, big_endian
>* target
,
3549 Sized_relobj_file
<size
, big_endian
>* object
,
3550 unsigned int data_shndx
,
3551 Output_section
* output_section
,
3552 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3553 unsigned int r_type
,
3556 Powerpc_relobj
<size
, big_endian
>* ppc_object
3557 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3559 // A STT_GNU_IFUNC symbol may require a PLT entry.
3560 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
3561 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
3562 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
3566 case elfcpp::R_POWERPC_NONE
:
3567 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3568 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3569 case elfcpp::R_PPC_LOCAL24PC
:
3570 case elfcpp::R_PPC_EMB_MRKREF
:
3571 case elfcpp::R_POWERPC_TLS
:
3574 case elfcpp::R_PPC64_TOC
:
3576 Output_data_got_powerpc
<size
, big_endian
>* got
3577 = target
->got_section(symtab
, layout
);
3578 if (parameters
->options().output_is_position_independent())
3580 Address off
= reloc
.get_r_offset();
3582 && data_shndx
== ppc_object
->opd_shndx()
3583 && ppc_object
->get_opd_discard(off
- 8))
3586 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3587 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3588 if (data_shndx
!= ppc_object
->opd_shndx())
3589 symobj
= static_cast
3590 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
3591 rela_dyn
->add_output_section_relative(got
->output_section(),
3592 elfcpp::R_POWERPC_RELATIVE
,
3594 object
, data_shndx
, off
,
3595 symobj
->toc_base_offset());
3600 case elfcpp::R_PPC64_ADDR64
:
3602 && data_shndx
== ppc_object
->opd_shndx()
3603 && (gsym
->is_defined_in_discarded_section()
3604 || gsym
->object() != object
))
3606 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3610 case elfcpp::R_PPC64_UADDR64
:
3611 case elfcpp::R_POWERPC_ADDR32
:
3612 case elfcpp::R_POWERPC_UADDR32
:
3613 case elfcpp::R_POWERPC_ADDR24
:
3614 case elfcpp::R_POWERPC_ADDR16
:
3615 case elfcpp::R_POWERPC_ADDR16_LO
:
3616 case elfcpp::R_POWERPC_ADDR16_HI
:
3617 case elfcpp::R_POWERPC_ADDR16_HA
:
3618 case elfcpp::R_POWERPC_UADDR16
:
3619 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3620 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3621 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3622 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3623 case elfcpp::R_PPC64_ADDR16_DS
:
3624 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3625 case elfcpp::R_POWERPC_ADDR14
:
3626 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3627 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3629 // Make a PLT entry if necessary.
3630 if (gsym
->needs_plt_entry())
3632 target
->make_plt_entry(layout
, gsym
, reloc
, 0);
3633 // Since this is not a PC-relative relocation, we may be
3634 // taking the address of a function. In that case we need to
3635 // set the entry in the dynamic symbol table to the address of
3636 // the PLT call stub.
3638 && gsym
->is_from_dynobj()
3639 && !parameters
->options().output_is_position_independent())
3640 gsym
->set_needs_dynsym_value();
3642 // Make a dynamic relocation if necessary.
3643 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
3644 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
3646 if (gsym
->may_need_copy_reloc())
3648 target
->copy_reloc(symtab
, layout
, object
,
3649 data_shndx
, output_section
, gsym
, reloc
);
3651 else if (((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
3652 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
3653 && (gsym
->can_use_relative_reloc(false)
3655 && data_shndx
== ppc_object
->opd_shndx())))
3657 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3658 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3659 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3661 rela_dyn
= target
->iplt_section()->rel_plt();
3662 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3664 rela_dyn
->add_symbolless_global_addend(
3665 gsym
, dynrel
, output_section
, object
, data_shndx
,
3666 reloc
.get_r_offset(), reloc
.get_r_addend());
3670 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3671 check_non_pic(object
, r_type
);
3672 rela_dyn
->add_global(gsym
, r_type
, output_section
,
3674 reloc
.get_r_offset(),
3675 reloc
.get_r_addend());
3681 case elfcpp::R_PPC_PLTREL24
:
3682 case elfcpp::R_POWERPC_REL24
:
3683 if (gsym
->needs_plt_entry()
3684 || (!gsym
->final_value_is_known()
3685 && (gsym
->is_undefined()
3686 || gsym
->is_from_dynobj()
3687 || gsym
->is_preemptible())))
3688 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
3691 case elfcpp::R_PPC64_REL64
:
3692 case elfcpp::R_POWERPC_REL32
:
3693 // Make a dynamic relocation if necessary.
3694 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
3696 if (gsym
->may_need_copy_reloc())
3698 target
->copy_reloc(symtab
, layout
, object
,
3699 data_shndx
, output_section
, gsym
,
3704 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3705 check_non_pic(object
, r_type
);
3706 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
3707 data_shndx
, reloc
.get_r_offset(),
3708 reloc
.get_r_addend());
3713 case elfcpp::R_POWERPC_REL16
:
3714 case elfcpp::R_POWERPC_REL16_LO
:
3715 case elfcpp::R_POWERPC_REL16_HI
:
3716 case elfcpp::R_POWERPC_REL16_HA
:
3717 case elfcpp::R_POWERPC_REL14
:
3718 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3719 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3720 case elfcpp::R_POWERPC_SECTOFF
:
3721 case elfcpp::R_POWERPC_TPREL16
:
3722 case elfcpp::R_POWERPC_DTPREL16
:
3723 case elfcpp::R_POWERPC_SECTOFF_LO
:
3724 case elfcpp::R_POWERPC_TPREL16_LO
:
3725 case elfcpp::R_POWERPC_DTPREL16_LO
:
3726 case elfcpp::R_POWERPC_SECTOFF_HI
:
3727 case elfcpp::R_POWERPC_TPREL16_HI
:
3728 case elfcpp::R_POWERPC_DTPREL16_HI
:
3729 case elfcpp::R_POWERPC_SECTOFF_HA
:
3730 case elfcpp::R_POWERPC_TPREL16_HA
:
3731 case elfcpp::R_POWERPC_DTPREL16_HA
:
3732 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3733 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3734 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3735 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3736 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3737 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3738 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3739 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3740 case elfcpp::R_PPC64_TPREL16_DS
:
3741 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3742 case elfcpp::R_PPC64_DTPREL16_DS
:
3743 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3744 case elfcpp::R_PPC64_SECTOFF_DS
:
3745 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3746 case elfcpp::R_PPC64_TLSGD
:
3747 case elfcpp::R_PPC64_TLSLD
:
3750 case elfcpp::R_POWERPC_GOT16
:
3751 case elfcpp::R_POWERPC_GOT16_LO
:
3752 case elfcpp::R_POWERPC_GOT16_HI
:
3753 case elfcpp::R_POWERPC_GOT16_HA
:
3754 case elfcpp::R_PPC64_GOT16_DS
:
3755 case elfcpp::R_PPC64_GOT16_LO_DS
:
3757 // The symbol requires a GOT entry.
3758 Output_data_got_powerpc
<size
, big_endian
>* got
;
3760 got
= target
->got_section(symtab
, layout
);
3761 if (gsym
->final_value_is_known())
3763 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3764 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
3766 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
3768 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
3770 // If we are generating a shared object or a pie, this
3771 // symbol's GOT entry will be set by a dynamic relocation.
3772 unsigned int off
= got
->add_constant(0);
3773 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
3775 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3776 if (gsym
->can_use_relative_reloc(false)
3778 && gsym
->visibility() == elfcpp::STV_PROTECTED
3779 && parameters
->options().shared()))
3781 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3782 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3784 rela_dyn
= target
->iplt_section()->rel_plt();
3785 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3787 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
3791 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
3792 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
3798 case elfcpp::R_PPC64_TOC16
:
3799 case elfcpp::R_PPC64_TOC16_LO
:
3800 case elfcpp::R_PPC64_TOC16_HI
:
3801 case elfcpp::R_PPC64_TOC16_HA
:
3802 case elfcpp::R_PPC64_TOC16_DS
:
3803 case elfcpp::R_PPC64_TOC16_LO_DS
:
3804 // We need a GOT section.
3805 target
->got_section(symtab
, layout
);
3808 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3809 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3810 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3811 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3813 const bool final
= gsym
->final_value_is_known();
3814 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
3815 if (tls_type
== tls::TLSOPT_NONE
)
3817 Output_data_got_powerpc
<size
, big_endian
>* got
3818 = target
->got_section(symtab
, layout
);
3819 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
3820 target
->rela_dyn_section(layout
),
3821 elfcpp::R_POWERPC_DTPMOD
,
3822 elfcpp::R_POWERPC_DTPREL
);
3824 else if (tls_type
== tls::TLSOPT_TO_IE
)
3826 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3828 Output_data_got_powerpc
<size
, big_endian
>* got
3829 = target
->got_section(symtab
, layout
);
3830 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3831 if (gsym
->is_undefined()
3832 || gsym
->is_from_dynobj())
3834 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3835 elfcpp::R_POWERPC_TPREL
);
3839 unsigned int off
= got
->add_constant(0);
3840 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3841 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3842 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3847 else if (tls_type
== tls::TLSOPT_TO_LE
)
3849 // no GOT relocs needed for Local Exec.
3856 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3857 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3858 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3859 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3861 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3862 if (tls_type
== tls::TLSOPT_NONE
)
3863 target
->tlsld_got_offset(symtab
, layout
, object
);
3864 else if (tls_type
== tls::TLSOPT_TO_LE
)
3866 // no GOT relocs needed for Local Exec.
3867 if (parameters
->options().emit_relocs())
3869 Output_section
* os
= layout
->tls_segment()->first_section();
3870 gold_assert(os
!= NULL
);
3871 os
->set_needs_symtab_index();
3879 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3880 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3881 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3882 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3884 Output_data_got_powerpc
<size
, big_endian
>* got
3885 = target
->got_section(symtab
, layout
);
3886 if (!gsym
->final_value_is_known()
3887 && (gsym
->is_from_dynobj()
3888 || gsym
->is_undefined()
3889 || gsym
->is_preemptible()))
3890 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
3891 target
->rela_dyn_section(layout
),
3892 elfcpp::R_POWERPC_DTPREL
);
3894 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
3898 case elfcpp::R_POWERPC_GOT_TPREL16
:
3899 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3900 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3901 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3903 const bool final
= gsym
->final_value_is_known();
3904 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
3905 if (tls_type
== tls::TLSOPT_NONE
)
3907 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3909 Output_data_got_powerpc
<size
, big_endian
>* got
3910 = target
->got_section(symtab
, layout
);
3911 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3912 if (gsym
->is_undefined()
3913 || gsym
->is_from_dynobj())
3915 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3916 elfcpp::R_POWERPC_TPREL
);
3920 unsigned int off
= got
->add_constant(0);
3921 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3922 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3923 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3928 else if (tls_type
== tls::TLSOPT_TO_LE
)
3930 // no GOT relocs needed for Local Exec.
3938 unsupported_reloc_global(object
, r_type
, gsym
);
3943 // Process relocations for gc.
3945 template<int size
, bool big_endian
>
3947 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
3948 Symbol_table
* symtab
,
3950 Sized_relobj_file
<size
, big_endian
>* object
,
3951 unsigned int data_shndx
,
3953 const unsigned char* prelocs
,
3955 Output_section
* output_section
,
3956 bool needs_special_offset_handling
,
3957 size_t local_symbol_count
,
3958 const unsigned char* plocal_symbols
)
3960 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
3961 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
3962 Powerpc_relobj
<size
, big_endian
>* ppc_object
3963 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3965 ppc_object
->set_opd_valid();
3966 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
3968 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
3969 for (p
= ppc_object
->access_from_map()->begin();
3970 p
!= ppc_object
->access_from_map()->end();
3973 Address dst_off
= p
->first
;
3974 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
3975 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
3976 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
3978 Object
* src_obj
= s
->first
;
3979 unsigned int src_indx
= s
->second
;
3980 symtab
->gc()->add_reference(src_obj
, src_indx
,
3981 ppc_object
, dst_indx
);
3985 ppc_object
->access_from_map()->clear();
3986 ppc_object
->process_gc_mark(symtab
);
3987 // Don't look at .opd relocs as .opd will reference everything.
3991 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
3992 typename
Target_powerpc::Relocatable_size_for_reloc
>(
4001 needs_special_offset_handling
,
4006 // Handle target specific gc actions when adding a gc reference from
4007 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
4008 // and DST_OFF. For powerpc64, this adds a referenc to the code
4009 // section of a function descriptor.
4011 template<int size
, bool big_endian
>
4013 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
4014 Symbol_table
* symtab
,
4016 unsigned int src_shndx
,
4018 unsigned int dst_shndx
,
4019 Address dst_off
) const
4021 Powerpc_relobj
<size
, big_endian
>* ppc_object
4022 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
4024 && !ppc_object
->is_dynamic()
4025 && dst_shndx
== ppc_object
->opd_shndx())
4027 if (ppc_object
->opd_valid())
4029 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
4030 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
4034 // If we haven't run scan_opd_relocs, we must delay
4035 // processing this function descriptor reference.
4036 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
4041 // Add any special sections for this symbol to the gc work list.
4042 // For powerpc64, this adds the code section of a function
4045 template<int size
, bool big_endian
>
4047 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
4048 Symbol_table
* symtab
,
4053 Powerpc_relobj
<size
, big_endian
>* ppc_object
4054 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
4056 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4057 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
4059 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
4060 Address dst_off
= gsym
->value();
4061 if (ppc_object
->opd_valid())
4063 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
4064 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
4067 ppc_object
->add_gc_mark(dst_off
);
4072 // Scan relocations for a section.
4074 template<int size
, bool big_endian
>
4076 Target_powerpc
<size
, big_endian
>::scan_relocs(
4077 Symbol_table
* symtab
,
4079 Sized_relobj_file
<size
, big_endian
>* object
,
4080 unsigned int data_shndx
,
4081 unsigned int sh_type
,
4082 const unsigned char* prelocs
,
4084 Output_section
* output_section
,
4085 bool needs_special_offset_handling
,
4086 size_t local_symbol_count
,
4087 const unsigned char* plocal_symbols
)
4089 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
4090 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
4092 if (sh_type
== elfcpp::SHT_REL
)
4094 gold_error(_("%s: unsupported REL reloc section"),
4095 object
->name().c_str());
4099 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
4108 needs_special_offset_handling
,
4113 // Functor class for processing the global symbol table.
4114 // Removes symbols defined on discarded opd entries.
4116 template<bool big_endian
>
4117 class Global_symbol_visitor_opd
4120 Global_symbol_visitor_opd()
4124 operator()(Sized_symbol
<64>* sym
)
4126 if (sym
->has_symtab_index()
4127 || sym
->source() != Symbol::FROM_OBJECT
4128 || !sym
->in_real_elf())
4131 Powerpc_relobj
<64, big_endian
>* symobj
4132 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
4133 if (symobj
->is_dynamic()
4134 || symobj
->opd_shndx() == 0)
4138 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4139 if (shndx
== symobj
->opd_shndx()
4140 && symobj
->get_opd_discard(sym
->value()))
4141 sym
->set_symtab_index(-1U);
4145 template<int size
, bool big_endian
>
4147 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
4149 Symbol_table
* symtab
)
4153 Output_data_save_res
<64, big_endian
>* savres
4154 = new Output_data_save_res
<64, big_endian
>(symtab
);
4155 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4156 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4157 savres
, ORDER_TEXT
, false);
4161 // Finalize the sections.
4163 template<int size
, bool big_endian
>
4165 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
4167 const Input_objects
*,
4168 Symbol_table
* symtab
)
4170 if (parameters
->doing_static_link())
4172 // At least some versions of glibc elf-init.o have a strong
4173 // reference to __rela_iplt marker syms. A weak ref would be
4175 if (this->iplt_
!= NULL
)
4177 Reloc_section
* rel
= this->iplt_
->rel_plt();
4178 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
4179 Symbol_table::PREDEFINED
, rel
, 0, 0,
4180 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4181 elfcpp::STV_HIDDEN
, 0, false, true);
4182 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
4183 Symbol_table::PREDEFINED
, rel
, 0, 0,
4184 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4185 elfcpp::STV_HIDDEN
, 0, true, true);
4189 symtab
->define_as_constant("__rela_iplt_start", NULL
,
4190 Symbol_table::PREDEFINED
, 0, 0,
4191 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4192 elfcpp::STV_HIDDEN
, 0, true, false);
4193 symtab
->define_as_constant("__rela_iplt_end", NULL
,
4194 Symbol_table::PREDEFINED
, 0, 0,
4195 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4196 elfcpp::STV_HIDDEN
, 0, true, false);
4202 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
4203 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
4204 this->define_save_restore_funcs(layout
, symtab
);
4207 // Fill in some more dynamic tags.
4208 Output_data_dynamic
* odyn
= layout
->dynamic_data();
4211 const Reloc_section
* rel_plt
= (this->plt_
== NULL
4213 : this->plt_
->rel_plt());
4214 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
4215 this->rela_dyn_
, true, size
== 32);
4219 if (this->got_
!= NULL
)
4221 this->got_
->finalize_data_size();
4222 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
4223 this->got_
, this->got_
->g_o_t());
4228 if (this->glink_
!= NULL
)
4230 this->glink_
->finalize_data_size();
4231 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
4233 (this->glink_
->pltresolve()
4234 + this->glink_
->pltresolve_size
4240 // Emit any relocs we saved in an attempt to avoid generating COPY
4242 if (this->copy_relocs_
.any_saved_relocs())
4243 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
4246 // Return the value to use for a branch relocation.
4248 template<int size
, bool big_endian
>
4249 typename
elfcpp::Elf_types
<size
>::Elf_Addr
4250 Target_powerpc
<size
, big_endian
>::symval_for_branch(
4252 const Sized_symbol
<size
>* gsym
,
4253 Powerpc_relobj
<size
, big_endian
>* object
,
4254 unsigned int *dest_shndx
)
4260 // If the symbol is defined in an opd section, ie. is a function
4261 // descriptor, use the function descriptor code entry address
4262 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
4264 && gsym
->source() != Symbol::FROM_OBJECT
)
4267 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4268 unsigned int shndx
= symobj
->opd_shndx();
4271 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
4272 gold_assert(opd_addr
!= invalid_address
);
4273 opd_addr
+= symobj
->output_section(shndx
)->address();
4274 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
4277 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
4278 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
4279 gold_assert(sec_addr
!= invalid_address
);
4280 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
4281 value
= sec_addr
+ sec_off
;
4286 // Perform a relocation.
4288 template<int size
, bool big_endian
>
4290 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
4291 const Relocate_info
<size
, big_endian
>* relinfo
,
4292 Target_powerpc
* target
,
4295 const elfcpp::Rela
<size
, big_endian
>& rela
,
4296 unsigned int r_type
,
4297 const Sized_symbol
<size
>* gsym
,
4298 const Symbol_value
<size
>* psymval
,
4299 unsigned char* view
,
4301 section_size_type view_size
)
4304 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
4305 || r_type
== elfcpp::R_PPC_PLTREL24
)
4307 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
4308 enum skip_tls last_tls
= this->call_tls_get_addr_
;
4309 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
4312 if (last_tls
== CALL_NOT_EXPECTED
)
4313 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4314 _("__tls_get_addr call lacks marker reloc"));
4315 else if (last_tls
== CALL_SKIP
)
4318 else if (last_tls
!= CALL_NOT_EXPECTED
)
4319 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4320 _("missing expected __tls_get_addr call"));
4322 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
4323 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
4324 Powerpc_relobj
<size
, big_endian
>* const object
4325 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
4327 bool has_plt_value
= false;
4328 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4330 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4331 : object
->local_has_plt_offset(r_sym
))
4333 const Output_data_glink
<size
, big_endian
>* glink
4334 = target
->glink_section();
4335 unsigned int glink_index
;
4337 glink_index
= glink
->find_entry(object
, gsym
, rela
);
4339 glink_index
= glink
->find_entry(object
, r_sym
, rela
);
4340 value
= glink
->address() + glink_index
* glink
->glink_entry_size();
4341 has_plt_value
= true;
4344 if (r_type
== elfcpp::R_POWERPC_GOT16
4345 || r_type
== elfcpp::R_POWERPC_GOT16_LO
4346 || r_type
== elfcpp::R_POWERPC_GOT16_HI
4347 || r_type
== elfcpp::R_POWERPC_GOT16_HA
4348 || r_type
== elfcpp::R_PPC64_GOT16_DS
4349 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
4353 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
4354 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
4358 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4359 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
4360 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
4362 value
-= target
->got_section()->got_base_offset(object
);
4364 else if (r_type
== elfcpp::R_PPC64_TOC
)
4366 value
= (target
->got_section()->output_section()->address()
4367 + object
->toc_base_offset());
4369 else if (gsym
!= NULL
4370 && (r_type
== elfcpp::R_POWERPC_REL24
4371 || r_type
== elfcpp::R_PPC_PLTREL24
)
4376 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
4377 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
4378 bool can_plt_call
= false;
4379 if (rela
.get_r_offset() + 8 <= view_size
)
4381 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4382 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
4385 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
4387 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
4388 can_plt_call
= true;
4393 // If we don't have a branch and link followed by a nop,
4394 // we can't go via the plt because there is no place to
4395 // put a toc restoring instruction.
4396 // Unless we know we won't be returning.
4397 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
4398 can_plt_call
= true;
4402 // This is not an error in one special case: A self
4403 // call. It isn't possible to cheaply verify we have
4404 // such a call so just check for a call to the same
4407 Address code
= value
;
4408 if (gsym
->source() == Symbol::FROM_OBJECT
4409 && gsym
->object() == object
)
4411 Address addend
= rela
.get_r_addend();
4412 unsigned int dest_shndx
;
4413 Address opdent
= psymval
->value(object
, addend
);
4414 code
= target
->symval_for_branch(opdent
, gsym
, object
,
4417 if (dest_shndx
== 0)
4418 dest_shndx
= gsym
->shndx(&is_ordinary
);
4419 ok
= dest_shndx
== relinfo
->data_shndx
;
4423 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4424 _("call lacks nop, can't restore toc; "
4425 "recompile with -fPIC"));
4431 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4432 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
4433 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
4434 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
4436 // First instruction of a global dynamic sequence, arg setup insn.
4437 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4438 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4439 enum Got_type got_type
= GOT_TYPE_STANDARD
;
4440 if (tls_type
== tls::TLSOPT_NONE
)
4441 got_type
= GOT_TYPE_TLSGD
;
4442 else if (tls_type
== tls::TLSOPT_TO_IE
)
4443 got_type
= GOT_TYPE_TPREL
;
4444 if (got_type
!= GOT_TYPE_STANDARD
)
4448 gold_assert(gsym
->has_got_offset(got_type
));
4449 value
= gsym
->got_offset(got_type
);
4453 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4454 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
4455 value
= object
->local_got_offset(r_sym
, got_type
);
4457 value
-= target
->got_section()->got_base_offset(object
);
4459 if (tls_type
== tls::TLSOPT_TO_IE
)
4461 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4462 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4464 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4465 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4466 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
4468 insn
|= 32 << 26; // lwz
4470 insn
|= 58 << 26; // ld
4471 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4473 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
4474 - elfcpp::R_POWERPC_GOT_TLSGD16
);
4476 else if (tls_type
== tls::TLSOPT_TO_LE
)
4478 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4479 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4481 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4482 Insn insn
= addis_3_13
;
4485 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4486 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4487 value
= psymval
->value(object
, rela
.get_r_addend());
4491 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4493 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4494 r_type
= elfcpp::R_POWERPC_NONE
;
4498 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4499 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
4500 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
4501 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
4503 // First instruction of a local dynamic sequence, arg setup insn.
4504 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4505 if (tls_type
== tls::TLSOPT_NONE
)
4507 value
= target
->tlsld_got_offset();
4508 value
-= target
->got_section()->got_base_offset(object
);
4512 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4513 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4514 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
4516 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4517 Insn insn
= addis_3_13
;
4520 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4521 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4526 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4528 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4529 r_type
= elfcpp::R_POWERPC_NONE
;
4533 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
4534 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
4535 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
4536 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
4538 // Accesses relative to a local dynamic sequence address,
4539 // no optimisation here.
4542 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
4543 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
4547 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4548 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
4549 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
4551 value
-= target
->got_section()->got_base_offset(object
);
4553 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4554 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
4555 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
4556 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
4558 // First instruction of initial exec sequence.
4559 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4560 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4561 if (tls_type
== tls::TLSOPT_NONE
)
4565 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
4566 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
4570 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4571 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
4572 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
4574 value
-= target
->got_section()->got_base_offset(object
);
4578 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4579 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4580 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
4582 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4583 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4584 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
4589 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4590 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4591 value
= psymval
->value(object
, rela
.get_r_addend());
4595 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4597 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4598 r_type
= elfcpp::R_POWERPC_NONE
;
4602 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4603 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4605 // Second instruction of a global dynamic sequence,
4606 // the __tls_get_addr call
4607 this->call_tls_get_addr_
= CALL_EXPECTED
;
4608 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4609 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4610 if (tls_type
!= tls::TLSOPT_NONE
)
4612 if (tls_type
== tls::TLSOPT_TO_IE
)
4614 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4615 Insn insn
= add_3_3_13
;
4618 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4619 r_type
= elfcpp::R_POWERPC_NONE
;
4623 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4624 Insn insn
= addi_3_3
;
4625 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4626 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4627 view
+= 2 * big_endian
;
4628 value
= psymval
->value(object
, rela
.get_r_addend());
4630 this->call_tls_get_addr_
= CALL_SKIP
;
4633 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4634 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4636 // Second instruction of a local dynamic sequence,
4637 // the __tls_get_addr call
4638 this->call_tls_get_addr_
= CALL_EXPECTED
;
4639 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4640 if (tls_type
== tls::TLSOPT_TO_LE
)
4642 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4643 Insn insn
= addi_3_3
;
4644 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4645 this->call_tls_get_addr_
= CALL_SKIP
;
4646 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4647 view
+= 2 * big_endian
;
4651 else if (r_type
== elfcpp::R_POWERPC_TLS
)
4653 // Second instruction of an initial exec sequence
4654 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4655 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4656 if (tls_type
== tls::TLSOPT_TO_LE
)
4658 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4659 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4660 unsigned int reg
= size
== 32 ? 2 : 13;
4661 insn
= at_tls_transform(insn
, reg
);
4662 gold_assert(insn
!= 0);
4663 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4664 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4665 view
+= 2 * big_endian
;
4666 value
= psymval
->value(object
, rela
.get_r_addend());
4669 else if (!has_plt_value
)
4672 unsigned int dest_shndx
;
4673 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
4674 addend
= rela
.get_r_addend();
4675 value
= psymval
->value(object
, addend
);
4676 if (size
== 64 && is_branch_reloc(r_type
))
4677 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
4682 case elfcpp::R_PPC64_REL64
:
4683 case elfcpp::R_POWERPC_REL32
:
4684 case elfcpp::R_POWERPC_REL24
:
4685 case elfcpp::R_PPC_PLTREL24
:
4686 case elfcpp::R_PPC_LOCAL24PC
:
4687 case elfcpp::R_POWERPC_REL16
:
4688 case elfcpp::R_POWERPC_REL16_LO
:
4689 case elfcpp::R_POWERPC_REL16_HI
:
4690 case elfcpp::R_POWERPC_REL16_HA
:
4691 case elfcpp::R_POWERPC_REL14
:
4692 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4693 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4697 case elfcpp::R_PPC64_TOC16
:
4698 case elfcpp::R_PPC64_TOC16_LO
:
4699 case elfcpp::R_PPC64_TOC16_HI
:
4700 case elfcpp::R_PPC64_TOC16_HA
:
4701 case elfcpp::R_PPC64_TOC16_DS
:
4702 case elfcpp::R_PPC64_TOC16_LO_DS
:
4703 // Subtract the TOC base address.
4704 value
-= (target
->got_section()->output_section()->address()
4705 + object
->toc_base_offset());
4708 case elfcpp::R_POWERPC_SECTOFF
:
4709 case elfcpp::R_POWERPC_SECTOFF_LO
:
4710 case elfcpp::R_POWERPC_SECTOFF_HI
:
4711 case elfcpp::R_POWERPC_SECTOFF_HA
:
4712 case elfcpp::R_PPC64_SECTOFF_DS
:
4713 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4715 value
-= os
->address();
4718 case elfcpp::R_PPC64_TPREL16_DS
:
4719 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4721 // R_PPC_TLSGD and R_PPC_TLSLD
4723 case elfcpp::R_POWERPC_TPREL16
:
4724 case elfcpp::R_POWERPC_TPREL16_LO
:
4725 case elfcpp::R_POWERPC_TPREL16_HI
:
4726 case elfcpp::R_POWERPC_TPREL16_HA
:
4727 case elfcpp::R_POWERPC_TPREL
:
4728 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4729 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4730 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4731 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4732 // tls symbol values are relative to tls_segment()->vaddr()
4736 case elfcpp::R_PPC64_DTPREL16_DS
:
4737 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4738 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4739 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4740 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4741 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4743 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
4744 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
4746 case elfcpp::R_POWERPC_DTPREL16
:
4747 case elfcpp::R_POWERPC_DTPREL16_LO
:
4748 case elfcpp::R_POWERPC_DTPREL16_HI
:
4749 case elfcpp::R_POWERPC_DTPREL16_HA
:
4750 case elfcpp::R_POWERPC_DTPREL
:
4751 // tls symbol values are relative to tls_segment()->vaddr()
4752 value
-= dtp_offset
;
4759 Insn branch_bit
= 0;
4762 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4763 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4764 branch_bit
= 1 << 21;
4765 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4766 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4768 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4769 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4772 if (this->is_isa_v2
)
4774 // Set 'a' bit. This is 0b00010 in BO field for branch
4775 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
4776 // for branch on CTR insns (BO == 1a00t or 1a01t).
4777 if ((insn
& (0x14 << 21)) == (0x04 << 21))
4779 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
4786 // Invert 'y' bit if not the default.
4787 if (static_cast<Signed_address
>(value
) < 0)
4790 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4798 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
4801 case elfcpp::R_POWERPC_ADDR32
:
4802 case elfcpp::R_POWERPC_UADDR32
:
4804 overflow
= Reloc::CHECK_BITFIELD
;
4807 case elfcpp::R_POWERPC_REL32
:
4809 overflow
= Reloc::CHECK_SIGNED
;
4812 case elfcpp::R_POWERPC_ADDR24
:
4813 case elfcpp::R_POWERPC_ADDR16
:
4814 case elfcpp::R_POWERPC_UADDR16
:
4815 case elfcpp::R_PPC64_ADDR16_DS
:
4816 case elfcpp::R_POWERPC_ADDR14
:
4817 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4818 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4819 overflow
= Reloc::CHECK_BITFIELD
;
4822 case elfcpp::R_POWERPC_REL24
:
4823 case elfcpp::R_PPC_PLTREL24
:
4824 case elfcpp::R_PPC_LOCAL24PC
:
4825 case elfcpp::R_POWERPC_REL16
:
4826 case elfcpp::R_PPC64_TOC16
:
4827 case elfcpp::R_POWERPC_GOT16
:
4828 case elfcpp::R_POWERPC_SECTOFF
:
4829 case elfcpp::R_POWERPC_TPREL16
:
4830 case elfcpp::R_POWERPC_DTPREL16
:
4831 case elfcpp::R_PPC64_TPREL16_DS
:
4832 case elfcpp::R_PPC64_DTPREL16_DS
:
4833 case elfcpp::R_PPC64_TOC16_DS
:
4834 case elfcpp::R_PPC64_GOT16_DS
:
4835 case elfcpp::R_PPC64_SECTOFF_DS
:
4836 case elfcpp::R_POWERPC_REL14
:
4837 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4838 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4839 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4840 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4841 case elfcpp::R_POWERPC_GOT_TPREL16
:
4842 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4843 overflow
= Reloc::CHECK_SIGNED
;
4847 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
4848 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
4851 case elfcpp::R_POWERPC_NONE
:
4852 case elfcpp::R_POWERPC_TLS
:
4853 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4854 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4855 case elfcpp::R_PPC_EMB_MRKREF
:
4858 case elfcpp::R_PPC64_ADDR64
:
4859 case elfcpp::R_PPC64_REL64
:
4860 case elfcpp::R_PPC64_TOC
:
4861 Reloc::addr64(view
, value
);
4864 case elfcpp::R_POWERPC_TPREL
:
4865 case elfcpp::R_POWERPC_DTPREL
:
4867 Reloc::addr64(view
, value
);
4869 status
= Reloc::addr32(view
, value
, overflow
);
4872 case elfcpp::R_PPC64_UADDR64
:
4873 Reloc::addr64_u(view
, value
);
4876 case elfcpp::R_POWERPC_ADDR32
:
4877 status
= Reloc::addr32(view
, value
, overflow
);
4880 case elfcpp::R_POWERPC_REL32
:
4881 case elfcpp::R_POWERPC_UADDR32
:
4882 status
= Reloc::addr32_u(view
, value
, overflow
);
4885 case elfcpp::R_POWERPC_ADDR24
:
4886 case elfcpp::R_POWERPC_REL24
:
4887 case elfcpp::R_PPC_PLTREL24
:
4888 case elfcpp::R_PPC_LOCAL24PC
:
4889 status
= Reloc::addr24(view
, value
, overflow
);
4892 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4893 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4896 status
= Reloc::addr16_ds(view
, value
, overflow
);
4899 case elfcpp::R_POWERPC_ADDR16
:
4900 case elfcpp::R_POWERPC_REL16
:
4901 case elfcpp::R_PPC64_TOC16
:
4902 case elfcpp::R_POWERPC_GOT16
:
4903 case elfcpp::R_POWERPC_SECTOFF
:
4904 case elfcpp::R_POWERPC_TPREL16
:
4905 case elfcpp::R_POWERPC_DTPREL16
:
4906 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4907 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4908 case elfcpp::R_POWERPC_GOT_TPREL16
:
4909 case elfcpp::R_POWERPC_ADDR16_LO
:
4910 case elfcpp::R_POWERPC_REL16_LO
:
4911 case elfcpp::R_PPC64_TOC16_LO
:
4912 case elfcpp::R_POWERPC_GOT16_LO
:
4913 case elfcpp::R_POWERPC_SECTOFF_LO
:
4914 case elfcpp::R_POWERPC_TPREL16_LO
:
4915 case elfcpp::R_POWERPC_DTPREL16_LO
:
4916 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4917 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4918 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4919 status
= Reloc::addr16(view
, value
, overflow
);
4922 case elfcpp::R_POWERPC_UADDR16
:
4923 status
= Reloc::addr16_u(view
, value
, overflow
);
4926 case elfcpp::R_POWERPC_ADDR16_HI
:
4927 case elfcpp::R_POWERPC_REL16_HI
:
4928 case elfcpp::R_PPC64_TOC16_HI
:
4929 case elfcpp::R_POWERPC_GOT16_HI
:
4930 case elfcpp::R_POWERPC_SECTOFF_HI
:
4931 case elfcpp::R_POWERPC_TPREL16_HI
:
4932 case elfcpp::R_POWERPC_DTPREL16_HI
:
4933 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4934 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4935 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4936 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4937 Reloc::addr16_hi(view
, value
);
4940 case elfcpp::R_POWERPC_ADDR16_HA
:
4941 case elfcpp::R_POWERPC_REL16_HA
:
4942 case elfcpp::R_PPC64_TOC16_HA
:
4943 case elfcpp::R_POWERPC_GOT16_HA
:
4944 case elfcpp::R_POWERPC_SECTOFF_HA
:
4945 case elfcpp::R_POWERPC_TPREL16_HA
:
4946 case elfcpp::R_POWERPC_DTPREL16_HA
:
4947 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4948 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4949 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4950 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4951 Reloc::addr16_ha(view
, value
);
4954 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4956 // R_PPC_EMB_NADDR16_LO
4958 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4959 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4960 Reloc::addr16_hi2(view
, value
);
4963 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4965 // R_PPC_EMB_NADDR16_HI
4967 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4968 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4969 Reloc::addr16_ha2(view
, value
);
4972 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4974 // R_PPC_EMB_NADDR16_HA
4976 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4977 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4978 Reloc::addr16_hi3(view
, value
);
4981 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4985 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4986 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4987 Reloc::addr16_ha3(view
, value
);
4990 case elfcpp::R_PPC64_DTPREL16_DS
:
4991 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4993 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
4995 case elfcpp::R_PPC64_TPREL16_DS
:
4996 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4998 // R_PPC_TLSGD, R_PPC_TLSLD
5000 case elfcpp::R_PPC64_ADDR16_DS
:
5001 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5002 case elfcpp::R_PPC64_TOC16_DS
:
5003 case elfcpp::R_PPC64_TOC16_LO_DS
:
5004 case elfcpp::R_PPC64_GOT16_DS
:
5005 case elfcpp::R_PPC64_GOT16_LO_DS
:
5006 case elfcpp::R_PPC64_SECTOFF_DS
:
5007 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5008 status
= Reloc::addr16_ds(view
, value
, overflow
);
5011 case elfcpp::R_POWERPC_ADDR14
:
5012 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5013 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5014 case elfcpp::R_POWERPC_REL14
:
5015 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5016 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5017 status
= Reloc::addr14(view
, value
, overflow
);
5020 case elfcpp::R_POWERPC_COPY
:
5021 case elfcpp::R_POWERPC_GLOB_DAT
:
5022 case elfcpp::R_POWERPC_JMP_SLOT
:
5023 case elfcpp::R_POWERPC_RELATIVE
:
5024 case elfcpp::R_POWERPC_DTPMOD
:
5025 case elfcpp::R_PPC64_JMP_IREL
:
5026 case elfcpp::R_POWERPC_IRELATIVE
:
5027 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5028 _("unexpected reloc %u in object file"),
5032 case elfcpp::R_PPC_EMB_SDA21
:
5037 // R_PPC64_TOCSAVE. For the time being this can be ignored.
5041 case elfcpp::R_PPC_EMB_SDA2I16
:
5042 case elfcpp::R_PPC_EMB_SDA2REL
:
5045 // R_PPC64_TLSGD, R_PPC64_TLSLD
5048 case elfcpp::R_POWERPC_PLT32
:
5049 case elfcpp::R_POWERPC_PLTREL32
:
5050 case elfcpp::R_POWERPC_PLT16_LO
:
5051 case elfcpp::R_POWERPC_PLT16_HI
:
5052 case elfcpp::R_POWERPC_PLT16_HA
:
5053 case elfcpp::R_PPC_SDAREL16
:
5054 case elfcpp::R_POWERPC_ADDR30
:
5055 case elfcpp::R_PPC64_PLT64
:
5056 case elfcpp::R_PPC64_PLTREL64
:
5057 case elfcpp::R_PPC64_PLTGOT16
:
5058 case elfcpp::R_PPC64_PLTGOT16_LO
:
5059 case elfcpp::R_PPC64_PLTGOT16_HI
:
5060 case elfcpp::R_PPC64_PLTGOT16_HA
:
5061 case elfcpp::R_PPC64_PLT16_LO_DS
:
5062 case elfcpp::R_PPC64_PLTGOT16_DS
:
5063 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
5064 case elfcpp::R_PPC_EMB_RELSEC16
:
5065 case elfcpp::R_PPC_EMB_RELST_LO
:
5066 case elfcpp::R_PPC_EMB_RELST_HI
:
5067 case elfcpp::R_PPC_EMB_RELST_HA
:
5068 case elfcpp::R_PPC_EMB_BIT_FLD
:
5069 case elfcpp::R_PPC_EMB_RELSDA
:
5070 case elfcpp::R_PPC_TOC16
:
5073 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5074 _("unsupported reloc %u"),
5078 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
5079 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5080 _("relocation overflow"));
5085 // Relocate section data.
5087 template<int size
, bool big_endian
>
5089 Target_powerpc
<size
, big_endian
>::relocate_section(
5090 const Relocate_info
<size
, big_endian
>* relinfo
,
5091 unsigned int sh_type
,
5092 const unsigned char* prelocs
,
5094 Output_section
* output_section
,
5095 bool needs_special_offset_handling
,
5096 unsigned char* view
,
5098 section_size_type view_size
,
5099 const Reloc_symbol_changes
* reloc_symbol_changes
)
5101 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5102 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
5103 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
5104 Powerpc_comdat_behavior
;
5106 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5108 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
5109 Powerpc_relocate
, Powerpc_comdat_behavior
>(
5115 needs_special_offset_handling
,
5119 reloc_symbol_changes
);
5122 class Powerpc_scan_relocatable_reloc
5125 // Return the strategy to use for a local symbol which is not a
5126 // section symbol, given the relocation type.
5127 inline Relocatable_relocs::Reloc_strategy
5128 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
5130 if (r_type
== 0 && r_sym
== 0)
5131 return Relocatable_relocs::RELOC_DISCARD
;
5132 return Relocatable_relocs::RELOC_COPY
;
5135 // Return the strategy to use for a local symbol which is a section
5136 // symbol, given the relocation type.
5137 inline Relocatable_relocs::Reloc_strategy
5138 local_section_strategy(unsigned int, Relobj
*)
5140 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
5143 // Return the strategy to use for a global symbol, given the
5144 // relocation type, the object, and the symbol index.
5145 inline Relocatable_relocs::Reloc_strategy
5146 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
5148 if (r_type
== elfcpp::R_PPC_PLTREL24
)
5149 return Relocatable_relocs::RELOC_SPECIAL
;
5150 return Relocatable_relocs::RELOC_COPY
;
5154 // Scan the relocs during a relocatable link.
5156 template<int size
, bool big_endian
>
5158 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
5159 Symbol_table
* symtab
,
5161 Sized_relobj_file
<size
, big_endian
>* object
,
5162 unsigned int data_shndx
,
5163 unsigned int sh_type
,
5164 const unsigned char* prelocs
,
5166 Output_section
* output_section
,
5167 bool needs_special_offset_handling
,
5168 size_t local_symbol_count
,
5169 const unsigned char* plocal_symbols
,
5170 Relocatable_relocs
* rr
)
5172 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5174 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
5175 Powerpc_scan_relocatable_reloc
>(
5183 needs_special_offset_handling
,
5189 // Emit relocations for a section.
5190 // This is a modified version of the function by the same name in
5191 // target-reloc.h. Using relocate_special_relocatable for
5192 // R_PPC_PLTREL24 would require duplication of the entire body of the
5193 // loop, so we may as well duplicate the whole thing.
5195 template<int size
, bool big_endian
>
5197 Target_powerpc
<size
, big_endian
>::relocate_relocs(
5198 const Relocate_info
<size
, big_endian
>* relinfo
,
5199 unsigned int sh_type
,
5200 const unsigned char* prelocs
,
5202 Output_section
* output_section
,
5203 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
5204 const Relocatable_relocs
* rr
,
5206 Address view_address
,
5208 unsigned char* reloc_view
,
5209 section_size_type reloc_view_size
)
5211 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5213 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
5215 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
5217 const int reloc_size
5218 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
5220 Powerpc_relobj
<size
, big_endian
>* const object
5221 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5222 const unsigned int local_count
= object
->local_symbol_count();
5223 unsigned int got2_shndx
= object
->got2_shndx();
5224 Address got2_addend
= 0;
5225 if (got2_shndx
!= 0)
5227 got2_addend
= object
->get_output_section_offset(got2_shndx
);
5228 gold_assert(got2_addend
!= invalid_address
);
5231 unsigned char* pwrite
= reloc_view
;
5232 bool zap_next
= false;
5233 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
5235 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
5236 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
5239 Reltype
reloc(prelocs
);
5240 Reltype_write
reloc_write(pwrite
);
5242 Address offset
= reloc
.get_r_offset();
5243 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
5244 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
5245 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
5246 const unsigned int orig_r_sym
= r_sym
;
5247 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
5248 = reloc
.get_r_addend();
5249 const Symbol
* gsym
= NULL
;
5253 // We could arrange to discard these and other relocs for
5254 // tls optimised sequences in the strategy methods, but for
5255 // now do as BFD ld does.
5256 r_type
= elfcpp::R_POWERPC_NONE
;
5260 // Get the new symbol index.
5261 if (r_sym
< local_count
)
5265 case Relocatable_relocs::RELOC_COPY
:
5266 case Relocatable_relocs::RELOC_SPECIAL
:
5269 r_sym
= object
->symtab_index(r_sym
);
5270 gold_assert(r_sym
!= -1U);
5274 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
5276 // We are adjusting a section symbol. We need to find
5277 // the symbol table index of the section symbol for
5278 // the output section corresponding to input section
5279 // in which this symbol is defined.
5280 gold_assert(r_sym
< local_count
);
5282 unsigned int shndx
=
5283 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
5284 gold_assert(is_ordinary
);
5285 Output_section
* os
= object
->output_section(shndx
);
5286 gold_assert(os
!= NULL
);
5287 gold_assert(os
->needs_symtab_index());
5288 r_sym
= os
->symtab_index();
5298 gsym
= object
->global_symbol(r_sym
);
5299 gold_assert(gsym
!= NULL
);
5300 if (gsym
->is_forwarder())
5301 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
5303 gold_assert(gsym
->has_symtab_index());
5304 r_sym
= gsym
->symtab_index();
5307 // Get the new offset--the location in the output section where
5308 // this relocation should be applied.
5309 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5310 offset
+= offset_in_output_section
;
5313 section_offset_type sot_offset
=
5314 convert_types
<section_offset_type
, Address
>(offset
);
5315 section_offset_type new_sot_offset
=
5316 output_section
->output_offset(object
, relinfo
->data_shndx
,
5318 gold_assert(new_sot_offset
!= -1);
5319 offset
= new_sot_offset
;
5322 // In an object file, r_offset is an offset within the section.
5323 // In an executable or dynamic object, generated by
5324 // --emit-relocs, r_offset is an absolute address.
5325 if (!parameters
->options().relocatable())
5327 offset
+= view_address
;
5328 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5329 offset
-= offset_in_output_section
;
5332 // Handle the reloc addend based on the strategy.
5333 if (strategy
== Relocatable_relocs::RELOC_COPY
)
5335 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
5337 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
5338 addend
= psymval
->value(object
, addend
);
5340 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
5342 if (addend
>= 32768)
5343 addend
+= got2_addend
;
5348 if (!parameters
->options().relocatable())
5350 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5351 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5352 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5353 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5355 // First instruction of a global dynamic sequence,
5357 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5358 switch (this->optimize_tls_gd(final
))
5360 case tls::TLSOPT_TO_IE
:
5361 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5362 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5364 case tls::TLSOPT_TO_LE
:
5365 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5366 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5367 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5370 r_type
= elfcpp::R_POWERPC_NONE
;
5371 offset
-= 2 * big_endian
;
5378 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5379 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5380 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5381 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5383 // First instruction of a local dynamic sequence,
5385 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5387 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5388 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5390 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5391 const Output_section
* os
= relinfo
->layout
->tls_segment()
5393 gold_assert(os
!= NULL
);
5394 gold_assert(os
->needs_symtab_index());
5395 r_sym
= os
->symtab_index();
5396 addend
= dtp_offset
;
5400 r_type
= elfcpp::R_POWERPC_NONE
;
5401 offset
-= 2 * big_endian
;
5405 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5406 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5407 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5408 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5410 // First instruction of initial exec sequence.
5411 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5412 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5414 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5415 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5416 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5419 r_type
= elfcpp::R_POWERPC_NONE
;
5420 offset
-= 2 * big_endian
;
5424 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5425 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5427 // Second instruction of a global dynamic sequence,
5428 // the __tls_get_addr call
5429 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5430 switch (this->optimize_tls_gd(final
))
5432 case tls::TLSOPT_TO_IE
:
5433 r_type
= elfcpp::R_POWERPC_NONE
;
5436 case tls::TLSOPT_TO_LE
:
5437 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5438 offset
+= 2 * big_endian
;
5445 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5446 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5448 // Second instruction of a local dynamic sequence,
5449 // the __tls_get_addr call
5450 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5452 const Output_section
* os
= relinfo
->layout
->tls_segment()
5454 gold_assert(os
!= NULL
);
5455 gold_assert(os
->needs_symtab_index());
5456 r_sym
= os
->symtab_index();
5457 addend
= dtp_offset
;
5458 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5459 offset
+= 2 * big_endian
;
5463 else if (r_type
== elfcpp::R_POWERPC_TLS
)
5465 // Second instruction of an initial exec sequence
5466 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5467 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5469 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5470 offset
+= 2 * big_endian
;
5475 reloc_write
.put_r_offset(offset
);
5476 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
5477 reloc_write
.put_r_addend(addend
);
5479 pwrite
+= reloc_size
;
5482 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
5483 == reloc_view_size
);
5486 // Return the value to use for a dynamic which requires special
5487 // treatment. This is how we support equality comparisons of function
5488 // pointers across shared library boundaries, as described in the
5489 // processor specific ABI supplement.
5491 template<int size
, bool big_endian
>
5493 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
5497 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
5498 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5499 unsigned int glink_index
= glink
->find_entry(gsym
);
5500 return glink
->address() + glink_index
* glink
->glink_entry_size();
5506 // Return the PLT address to use for a local symbol.
5507 template<int size
, bool big_endian
>
5509 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
5510 const Relobj
* object
,
5511 unsigned int symndx
) const
5515 const Sized_relobj
<size
, big_endian
>* relobj
5516 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
5517 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5518 unsigned int glink_index
= glink
->find_entry(relobj
->sized_relobj(),
5520 return glink
->address() + glink_index
* glink
->glink_entry_size();
5526 // Return the PLT address to use for a global symbol.
5527 template<int size
, bool big_endian
>
5529 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
5530 const Symbol
* gsym
) const
5534 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5535 unsigned int glink_index
= glink
->find_entry(gsym
);
5536 return glink
->address() + glink_index
* glink
->glink_entry_size();
5542 // Return the offset to use for the GOT_INDX'th got entry which is
5543 // for a local tls symbol specified by OBJECT, SYMNDX.
5544 template<int size
, bool big_endian
>
5546 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
5547 const Relobj
* object
,
5548 unsigned int symndx
,
5549 unsigned int got_indx
) const
5551 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5552 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
5553 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
5555 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5556 got_type
<= GOT_TYPE_TPREL
;
5557 got_type
= Got_type(got_type
+ 1))
5558 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
5560 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
5561 if (got_type
== GOT_TYPE_TLSGD
)
5563 if (off
== got_indx
* (size
/ 8))
5565 if (got_type
== GOT_TYPE_TPREL
)
5575 // Return the offset to use for the GOT_INDX'th got entry which is
5576 // for global tls symbol GSYM.
5577 template<int size
, bool big_endian
>
5579 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
5581 unsigned int got_indx
) const
5583 if (gsym
->type() == elfcpp::STT_TLS
)
5585 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5586 got_type
<= GOT_TYPE_TPREL
;
5587 got_type
= Got_type(got_type
+ 1))
5588 if (gsym
->has_got_offset(got_type
))
5590 unsigned int off
= gsym
->got_offset(got_type
);
5591 if (got_type
== GOT_TYPE_TLSGD
)
5593 if (off
== got_indx
* (size
/ 8))
5595 if (got_type
== GOT_TYPE_TPREL
)
5605 // The selector for powerpc object files.
5607 template<int size
, bool big_endian
>
5608 class Target_selector_powerpc
: public Target_selector
5611 Target_selector_powerpc()
5612 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
5614 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
5615 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
5617 ? (big_endian
? "elf64ppc" : "elf64lppc")
5618 : (big_endian
? "elf32ppc" : "elf32lppc")))
5622 do_recognize(Input_file
*, off_t
, int machine
, int, int)
5627 if (machine
!= elfcpp::EM_PPC64
)
5632 if (machine
!= elfcpp::EM_PPC
)
5640 return this->instantiate_target();
5644 do_instantiate_target()
5645 { return new Target_powerpc
<size
, big_endian
>(); }
5648 Target_selector_powerpc
<32, true> target_selector_ppc32
;
5649 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
5650 Target_selector_powerpc
<64, true> target_selector_ppc64
;
5651 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
5653 } // End anonymous namespace.