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(Symbol_table
*, Layout
*);
717 make_iplt_section(Symbol_table
*, Layout
*);
719 // Create a PLT entry for a global symbol.
721 make_plt_entry(Symbol_table
*, 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(Symbol_table
*, Layout
*,
728 const elfcpp::Rela
<size
, big_endian
>&,
729 Sized_relobj_file
<size
, big_endian
>*);
731 // Create a GOT entry for local dynamic __tls_get_addr.
733 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
734 Sized_relobj_file
<size
, big_endian
>* object
);
737 tlsld_got_offset() const
739 return this->tlsld_got_offset_
;
742 // Get the dynamic reloc section, creating it if necessary.
744 rela_dyn_section(Layout
*);
746 // Copy a relocation against a global symbol.
748 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
749 Sized_relobj_file
<size
, big_endian
>* object
,
750 unsigned int shndx
, Output_section
* output_section
,
751 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
753 this->copy_relocs_
.copy_reloc(symtab
, layout
,
754 symtab
->get_sized_symbol
<size
>(sym
),
755 object
, shndx
, output_section
,
756 reloc
, this->rela_dyn_section(layout
));
759 // Information about this specific target which we pass to the
760 // general Target structure.
761 static Target::Target_info powerpc_info
;
763 // The types of GOT entries needed for this platform.
764 // These values are exposed to the ABI in an incremental link.
765 // Do not renumber existing values without changing the version
766 // number of the .gnu_incremental_inputs section.
770 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
771 GOT_TYPE_DTPREL
, // entry for @got@dtprel
772 GOT_TYPE_TPREL
// entry for @got@tprel
775 // The GOT output section.
776 Output_data_got_powerpc
<size
, big_endian
>* got_
;
777 // The PLT output section.
778 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
779 // The IPLT output section.
780 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
781 // The .glink output section.
782 Output_data_glink
<size
, big_endian
>* glink_
;
783 // The dynamic reloc output section.
784 Reloc_section
* rela_dyn_
;
785 // Relocs saved to avoid a COPY reloc.
786 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
787 // Space for variables copied with a COPY reloc.
788 Output_data_space
* dynbss_
;
789 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
790 unsigned int tlsld_got_offset_
;
794 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
797 true, // is_big_endian
798 elfcpp::EM_PPC
, // machine_code
799 false, // has_make_symbol
800 false, // has_resolve
801 false, // has_code_fill
802 true, // is_default_stack_executable
803 false, // can_icf_inline_merge_sections
805 "/usr/lib/ld.so.1", // dynamic_linker
806 0x10000000, // default_text_segment_address
807 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
808 4 * 1024, // common_pagesize (overridable by -z common-page-size)
809 false, // isolate_execinstr
811 elfcpp::SHN_UNDEF
, // small_common_shndx
812 elfcpp::SHN_UNDEF
, // large_common_shndx
813 0, // small_common_section_flags
814 0, // large_common_section_flags
815 NULL
, // attributes_section
816 NULL
// attributes_vendor
820 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
823 false, // is_big_endian
824 elfcpp::EM_PPC
, // machine_code
825 false, // has_make_symbol
826 false, // has_resolve
827 false, // has_code_fill
828 true, // is_default_stack_executable
829 false, // can_icf_inline_merge_sections
831 "/usr/lib/ld.so.1", // dynamic_linker
832 0x10000000, // default_text_segment_address
833 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
834 4 * 1024, // common_pagesize (overridable by -z common-page-size)
835 false, // isolate_execinstr
837 elfcpp::SHN_UNDEF
, // small_common_shndx
838 elfcpp::SHN_UNDEF
, // large_common_shndx
839 0, // small_common_section_flags
840 0, // large_common_section_flags
841 NULL
, // attributes_section
842 NULL
// attributes_vendor
846 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
849 true, // is_big_endian
850 elfcpp::EM_PPC64
, // machine_code
851 false, // has_make_symbol
852 false, // has_resolve
853 false, // has_code_fill
854 true, // is_default_stack_executable
855 false, // can_icf_inline_merge_sections
857 "/usr/lib/ld.so.1", // dynamic_linker
858 0x10000000, // default_text_segment_address
859 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
860 4 * 1024, // common_pagesize (overridable by -z common-page-size)
861 false, // isolate_execinstr
863 elfcpp::SHN_UNDEF
, // small_common_shndx
864 elfcpp::SHN_UNDEF
, // large_common_shndx
865 0, // small_common_section_flags
866 0, // large_common_section_flags
867 NULL
, // attributes_section
868 NULL
// attributes_vendor
872 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
875 false, // is_big_endian
876 elfcpp::EM_PPC64
, // machine_code
877 false, // has_make_symbol
878 false, // has_resolve
879 false, // has_code_fill
880 true, // is_default_stack_executable
881 false, // can_icf_inline_merge_sections
883 "/usr/lib/ld.so.1", // dynamic_linker
884 0x10000000, // default_text_segment_address
885 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
886 4 * 1024, // common_pagesize (overridable by -z common-page-size)
887 false, // isolate_execinstr
889 elfcpp::SHN_UNDEF
, // small_common_shndx
890 elfcpp::SHN_UNDEF
, // large_common_shndx
891 0, // small_common_section_flags
892 0, // large_common_section_flags
893 NULL
, // attributes_section
894 NULL
// attributes_vendor
898 is_branch_reloc(unsigned int r_type
)
900 return (r_type
== elfcpp::R_POWERPC_REL24
901 || r_type
== elfcpp::R_PPC_PLTREL24
902 || r_type
== elfcpp::R_PPC_LOCAL24PC
903 || r_type
== elfcpp::R_POWERPC_REL14
904 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
905 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
906 || r_type
== elfcpp::R_POWERPC_ADDR24
907 || r_type
== elfcpp::R_POWERPC_ADDR14
908 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
909 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
912 // If INSN is an opcode that may be used with an @tls operand, return
913 // the transformed insn for TLS optimisation, otherwise return 0. If
914 // REG is non-zero only match an insn with RB or RA equal to REG.
916 at_tls_transform(uint32_t insn
, unsigned int reg
)
918 if ((insn
& (0x3f << 26)) != 31 << 26)
922 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
923 rtra
= insn
& ((1 << 26) - (1 << 16));
924 else if (((insn
>> 16) & 0x1f) == reg
)
925 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
929 if ((insn
& (0x3ff << 1)) == 266 << 1)
932 else if ((insn
& (0x1f << 1)) == 23 << 1
933 && ((insn
& (0x1f << 6)) < 14 << 6
934 || ((insn
& (0x1f << 6)) >= 16 << 6
935 && (insn
& (0x1f << 6)) < 24 << 6)))
936 // load and store indexed -> dform
937 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
938 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
939 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
940 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
941 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
943 insn
= (58 << 26) | 2;
950 // Modified version of symtab.h class Symbol member
951 // Given a direct absolute or pc-relative static relocation against
952 // the global symbol, this function returns whether a dynamic relocation
957 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
959 // No dynamic relocations in a static link!
960 if (parameters
->doing_static_link())
963 // A reference to an undefined symbol from an executable should be
964 // statically resolved to 0, and does not need a dynamic relocation.
965 // This matches gnu ld behavior.
966 if (gsym
->is_undefined() && !parameters
->options().shared())
969 // A reference to an absolute symbol does not need a dynamic relocation.
970 if (gsym
->is_absolute())
973 // An absolute reference within a position-independent output file
974 // will need a dynamic relocation.
975 if ((flags
& Symbol::ABSOLUTE_REF
)
976 && parameters
->options().output_is_position_independent())
979 // A function call that can branch to a local PLT entry does not need
980 // a dynamic relocation.
981 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
984 // A reference to any PLT entry in a non-position-independent executable
985 // does not need a dynamic relocation.
986 // Except due to having function descriptors on powerpc64 we don't define
987 // functions to their plt code in an executable, so this doesn't apply.
989 && !parameters
->options().output_is_position_independent()
990 && gsym
->has_plt_offset())
993 // A reference to a symbol defined in a dynamic object or to a
994 // symbol that is preemptible will need a dynamic relocation.
995 if (gsym
->is_from_dynobj()
996 || gsym
->is_undefined()
997 || gsym
->is_preemptible())
1000 // For all other cases, return FALSE.
1004 // Modified version of symtab.h class Symbol member
1005 // Whether we should use the PLT offset associated with a symbol for
1006 // a relocation. FLAGS is a set of Reference_flags.
1010 use_plt_offset(const Symbol
* gsym
, int flags
)
1012 // If the symbol doesn't have a PLT offset, then naturally we
1013 // don't want to use it.
1014 if (!gsym
->has_plt_offset())
1017 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1018 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1021 // If we are going to generate a dynamic relocation, then we will
1022 // wind up using that, so no need to use the PLT entry.
1023 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1026 // If the symbol is from a dynamic object, we need to use the PLT
1028 if (gsym
->is_from_dynobj())
1031 // If we are generating a shared object, and gsym symbol is
1032 // undefined or preemptible, we need to use the PLT entry.
1033 if (parameters
->options().shared()
1034 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1037 // If gsym is a call to a weak undefined symbol, we need to use
1038 // the PLT entry; the symbol may be defined by a library loaded
1040 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1043 // Otherwise we can use the regular definition.
1047 template<int size
, bool big_endian
>
1048 class Powerpc_relocate_functions
1065 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1066 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1068 template<int valsize
>
1070 has_overflow_signed(Address value
)
1072 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1073 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1074 limit
<<= ((valsize
- 1) >> 1);
1075 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1076 return value
+ limit
> (limit
<< 1) - 1;
1079 template<int valsize
>
1081 has_overflow_bitfield(Address value
)
1083 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1084 limit
<<= ((valsize
- 1) >> 1);
1085 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1086 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1089 template<int valsize
>
1090 static inline Status
1091 overflowed(Address value
, Overflow_check overflow
)
1093 if (overflow
== CHECK_SIGNED
)
1095 if (has_overflow_signed
<valsize
>(value
))
1096 return STATUS_OVERFLOW
;
1098 else if (overflow
== CHECK_BITFIELD
)
1100 if (has_overflow_bitfield
<valsize
>(value
))
1101 return STATUS_OVERFLOW
;
1106 // Do a simple RELA relocation
1107 template<int valsize
>
1108 static inline Status
1109 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1111 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1112 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1113 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1114 return overflowed
<valsize
>(value
, overflow
);
1117 template<int valsize
>
1118 static inline Status
1119 rela(unsigned char* view
,
1120 unsigned int right_shift
,
1121 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1123 Overflow_check overflow
)
1125 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1126 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1127 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1128 Valtype reloc
= value
>> right_shift
;
1131 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1132 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1135 // Do a simple RELA relocation, unaligned.
1136 template<int valsize
>
1137 static inline Status
1138 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1140 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1141 return overflowed
<valsize
>(value
, overflow
);
1144 template<int valsize
>
1145 static inline Status
1146 rela_ua(unsigned char* view
,
1147 unsigned int right_shift
,
1148 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1150 Overflow_check overflow
)
1152 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1154 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1155 Valtype reloc
= value
>> right_shift
;
1158 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1159 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1163 // R_PPC64_ADDR64: (Symbol + Addend)
1165 addr64(unsigned char* view
, Address value
)
1166 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1168 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1170 addr64_u(unsigned char* view
, Address value
)
1171 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1173 // R_POWERPC_ADDR32: (Symbol + Addend)
1174 static inline Status
1175 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1176 { return This::template rela
<32>(view
, value
, overflow
); }
1178 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1179 static inline Status
1180 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1181 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1183 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1184 static inline Status
1185 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1187 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1188 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1189 stat
= STATUS_OVERFLOW
;
1193 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1194 static inline Status
1195 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1196 { return This::template rela
<16>(view
, value
, overflow
); }
1198 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1199 static inline Status
1200 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1201 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1203 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1204 static inline Status
1205 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1207 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1208 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1209 stat
= STATUS_OVERFLOW
;
1213 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1215 addr16_hi(unsigned char* view
, Address value
)
1216 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1218 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1220 addr16_ha(unsigned char* view
, Address value
)
1221 { This::addr16_hi(view
, value
+ 0x8000); }
1223 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1225 addr16_hi2(unsigned char* view
, Address value
)
1226 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1228 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1230 addr16_ha2(unsigned char* view
, Address value
)
1231 { This::addr16_hi2(view
, value
+ 0x8000); }
1233 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1235 addr16_hi3(unsigned char* view
, Address value
)
1236 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1238 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1240 addr16_ha3(unsigned char* view
, Address value
)
1241 { This::addr16_hi3(view
, value
+ 0x8000); }
1243 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1244 static inline Status
1245 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1247 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1248 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1249 stat
= STATUS_OVERFLOW
;
1254 // Stash away the index of .got2 or .opd in a relocatable object, if
1255 // such a section exists.
1257 template<int size
, bool big_endian
>
1259 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1260 Read_symbols_data
* sd
)
1262 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1263 const unsigned char* namesu
= sd
->section_names
->data();
1264 const char* names
= reinterpret_cast<const char*>(namesu
);
1265 section_size_type names_size
= sd
->section_names_size
;
1266 const unsigned char* s
;
1268 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1269 names
, names_size
, NULL
);
1272 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1273 this->special_
= ndx
;
1275 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1278 // Examine .rela.opd to build info about function entry points.
1280 template<int size
, bool big_endian
>
1282 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1284 const unsigned char* prelocs
,
1285 const unsigned char* plocal_syms
)
1289 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1291 const int reloc_size
1292 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1293 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1294 Address expected_off
= 0;
1295 bool regular
= true;
1296 unsigned int opd_ent_size
= 0;
1298 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1300 Reltype
reloc(prelocs
);
1301 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1302 = reloc
.get_r_info();
1303 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1304 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1306 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1307 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1310 if (r_sym
< this->local_symbol_count())
1312 typename
elfcpp::Sym
<size
, big_endian
>
1313 lsym(plocal_syms
+ r_sym
* sym_size
);
1314 shndx
= lsym
.get_st_shndx();
1315 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1316 value
= lsym
.get_st_value();
1319 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1321 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1322 value
+ reloc
.get_r_addend());
1325 expected_off
= reloc
.get_r_offset();
1326 opd_ent_size
= expected_off
;
1328 else if (expected_off
!= reloc
.get_r_offset())
1330 expected_off
+= opd_ent_size
;
1332 else if (r_type
== elfcpp::R_PPC64_TOC
)
1334 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1339 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1340 this->name().c_str(), r_type
);
1344 if (reloc_count
<= 2)
1345 opd_ent_size
= this->section_size(this->opd_shndx());
1346 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1350 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1351 this->name().c_str());
1357 template<int size
, bool big_endian
>
1359 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1361 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1364 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1365 p
!= rd
->relocs
.end();
1368 if (p
->data_shndx
== this->opd_shndx())
1370 uint64_t opd_size
= this->section_size(this->opd_shndx());
1371 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1374 this->init_opd(opd_size
);
1375 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1376 rd
->local_symbols
->data());
1384 // Set up some symbols, then perform Sized_relobj_file method.
1386 template<int size
, bool big_endian
>
1388 Powerpc_relobj
<size
, big_endian
>::do_scan_relocs(Symbol_table
* symtab
,
1390 Read_relocs_data
* rd
)
1394 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1395 // undefined when scanning relocs (and thus requires
1396 // non-relative dynamic relocs). The proper value will be
1398 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1399 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1401 Target_powerpc
<size
, big_endian
>* target
=
1402 static_cast<Target_powerpc
<size
, big_endian
>*>(
1403 parameters
->sized_target
<size
, big_endian
>());
1404 Output_data_got_powerpc
<size
, big_endian
>* got
1405 = target
->got_section(symtab
, layout
);
1406 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1407 Symbol_table::PREDEFINED
,
1411 elfcpp::STV_HIDDEN
, 0,
1415 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1416 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1417 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1419 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1421 = layout
->add_output_section_data(".sdata", 0,
1423 | elfcpp::SHF_WRITE
,
1424 sdata
, ORDER_SMALL_DATA
, false);
1425 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1426 Symbol_table::PREDEFINED
,
1427 os
, 32768, 0, elfcpp::STT_OBJECT
,
1428 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1432 Sized_relobj_file
<size
, big_endian
>::do_scan_relocs(symtab
, layout
, rd
);
1435 // Set up PowerPC target specific relobj.
1437 template<int size
, bool big_endian
>
1439 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1440 const std::string
& name
,
1441 Input_file
* input_file
,
1442 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1444 int et
= ehdr
.get_e_type();
1445 // ET_EXEC files are valid input for --just-symbols/-R,
1446 // and we treat them as relocatable objects.
1447 if (et
== elfcpp::ET_REL
1448 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1450 Powerpc_relobj
<size
, big_endian
>* obj
=
1451 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1455 else if (et
== elfcpp::ET_DYN
)
1457 Sized_dynobj
<size
, big_endian
>* obj
=
1458 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1464 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1469 template<int size
, bool big_endian
>
1470 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1473 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1474 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1476 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1477 : Output_data_got
<size
, big_endian
>(),
1478 symtab_(symtab
), layout_(layout
),
1479 header_ent_cnt_(size
== 32 ? 3 : 1),
1480 header_index_(size
== 32 ? 0x2000 : 0)
1485 // Create a new GOT entry and return its offset.
1487 add_got_entry(Got_entry got_entry
)
1489 this->reserve_ent();
1490 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1493 // Create a pair of new GOT entries and return the offset of the first.
1495 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1497 this->reserve_ent(2);
1498 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1503 add_constant_pair(Valtype c1
, Valtype c2
)
1505 this->reserve_ent(2);
1506 unsigned int got_offset
= this->add_constant(c1
);
1507 this->add_constant(c2
);
1511 // Offset of _GLOBAL_OFFSET_TABLE_.
1515 return this->got_offset(this->header_index_
);
1518 // Offset of base used to access the GOT/TOC.
1519 // The got/toc pointer reg will be set to this value.
1521 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1524 return this->g_o_t();
1526 return (this->output_section()->address()
1527 + object
->toc_base_offset()
1531 // Ensure our GOT has a header.
1533 set_final_data_size()
1535 if (this->header_ent_cnt_
!= 0)
1536 this->make_header();
1537 Output_data_got
<size
, big_endian
>::set_final_data_size();
1540 // First word of GOT header needs some values that are not
1541 // handled by Output_data_got so poke them in here.
1542 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1544 do_write(Output_file
* of
)
1547 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
1548 val
= this->layout_
->dynamic_section()->address();
1550 val
= this->output_section()->address() + 0x8000;
1551 this->replace_constant(this->header_index_
, val
);
1552 Output_data_got
<size
, big_endian
>::do_write(of
);
1557 reserve_ent(unsigned int cnt
= 1)
1559 if (this->header_ent_cnt_
== 0)
1561 if (this->num_entries() + cnt
> this->header_index_
)
1562 this->make_header();
1568 this->header_ent_cnt_
= 0;
1569 this->header_index_
= this->num_entries();
1572 Output_data_got
<size
, big_endian
>::add_constant(0);
1573 Output_data_got
<size
, big_endian
>::add_constant(0);
1574 Output_data_got
<size
, big_endian
>::add_constant(0);
1576 // Define _GLOBAL_OFFSET_TABLE_ at the header
1577 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1580 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
1581 sym
->set_value(this->g_o_t());
1584 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1585 Symbol_table::PREDEFINED
,
1586 this, this->g_o_t(), 0,
1589 elfcpp::STV_HIDDEN
, 0,
1593 Output_data_got
<size
, big_endian
>::add_constant(0);
1596 // Stashed pointers.
1597 Symbol_table
* symtab_
;
1601 unsigned int header_ent_cnt_
;
1602 // GOT header index.
1603 unsigned int header_index_
;
1606 // Get the GOT section, creating it if necessary.
1608 template<int size
, bool big_endian
>
1609 Output_data_got_powerpc
<size
, big_endian
>*
1610 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1613 if (this->got_
== NULL
)
1615 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1618 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1620 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1621 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1622 this->got_
, ORDER_DATA
, false);
1628 // Get the dynamic reloc section, creating it if necessary.
1630 template<int size
, bool big_endian
>
1631 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1632 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1634 if (this->rela_dyn_
== NULL
)
1636 gold_assert(layout
!= NULL
);
1637 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1638 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1639 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1640 ORDER_DYNAMIC_RELOCS
, false);
1642 return this->rela_dyn_
;
1645 // A class to handle the PLT data.
1647 template<int size
, bool big_endian
>
1648 class Output_data_plt_powerpc
: public Output_section_data_build
1651 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
1652 size
, big_endian
> Reloc_section
;
1654 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
1655 Reloc_section
* plt_rel
,
1656 unsigned int reserved_size
,
1658 : Output_section_data_build(size
== 32 ? 4 : 8),
1661 initial_plt_entry_size_(reserved_size
),
1665 // Add an entry to the PLT.
1670 add_ifunc_entry(Symbol
*);
1673 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
1675 // Return the .rela.plt section data.
1682 // Return the number of PLT entries.
1686 return ((this->current_data_size() - this->initial_plt_entry_size_
)
1690 // Return the offset of the first non-reserved PLT entry.
1692 first_plt_entry_offset()
1693 { return this->initial_plt_entry_size_
; }
1695 // Return the size of a PLT entry.
1697 get_plt_entry_size()
1698 { return plt_entry_size
; }
1702 do_adjust_output_section(Output_section
* os
)
1707 // Write to a map file.
1709 do_print_to_mapfile(Mapfile
* mapfile
) const
1710 { mapfile
->print_output_data(this, this->name_
); }
1713 // The size of an entry in the PLT.
1714 static const int plt_entry_size
= size
== 32 ? 4 : 24;
1716 // Write out the PLT data.
1718 do_write(Output_file
*);
1720 // The reloc section.
1721 Reloc_section
* rel_
;
1722 // Allows access to .glink for do_write.
1723 Target_powerpc
<size
, big_endian
>* targ_
;
1724 // The size of the first reserved entry.
1725 int initial_plt_entry_size_
;
1726 // What to report in map file.
1730 // Add an entry to the PLT.
1732 template<int size
, bool big_endian
>
1734 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
1736 if (!gsym
->has_plt_offset())
1738 off_t off
= this->current_data_size();
1740 off
+= this->first_plt_entry_offset();
1741 gsym
->set_plt_offset(off
);
1742 gsym
->set_needs_dynsym_entry();
1743 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
1744 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
1745 off
+= plt_entry_size
;
1746 this->set_current_data_size(off
);
1750 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
1752 template<int size
, bool big_endian
>
1754 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
1756 if (!gsym
->has_plt_offset())
1758 off_t off
= this->current_data_size();
1759 gsym
->set_plt_offset(off
);
1760 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1762 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1763 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
1764 off
+= plt_entry_size
;
1765 this->set_current_data_size(off
);
1769 // Add an entry for a local ifunc symbol to the IPLT.
1771 template<int size
, bool big_endian
>
1773 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
1774 Sized_relobj_file
<size
, big_endian
>* relobj
,
1775 unsigned int local_sym_index
)
1777 if (!relobj
->local_has_plt_offset(local_sym_index
))
1779 off_t off
= this->current_data_size();
1780 relobj
->set_local_plt_offset(local_sym_index
, off
);
1781 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
1783 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
1784 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
1786 off
+= plt_entry_size
;
1787 this->set_current_data_size(off
);
1791 static const uint32_t add_0_11_11
= 0x7c0b5a14;
1792 static const uint32_t add_3_3_2
= 0x7c631214;
1793 static const uint32_t add_3_3_13
= 0x7c636a14;
1794 static const uint32_t add_11_0_11
= 0x7d605a14;
1795 static const uint32_t add_12_2_11
= 0x7d825a14;
1796 static const uint32_t addi_11_11
= 0x396b0000;
1797 static const uint32_t addi_12_12
= 0x398c0000;
1798 static const uint32_t addi_2_2
= 0x38420000;
1799 static const uint32_t addi_3_2
= 0x38620000;
1800 static const uint32_t addi_3_3
= 0x38630000;
1801 static const uint32_t addis_0_2
= 0x3c020000;
1802 static const uint32_t addis_0_13
= 0x3c0d0000;
1803 static const uint32_t addis_11_11
= 0x3d6b0000;
1804 static const uint32_t addis_11_30
= 0x3d7e0000;
1805 static const uint32_t addis_12_12
= 0x3d8c0000;
1806 static const uint32_t addis_12_2
= 0x3d820000;
1807 static const uint32_t addis_3_2
= 0x3c620000;
1808 static const uint32_t addis_3_13
= 0x3c6d0000;
1809 static const uint32_t b
= 0x48000000;
1810 static const uint32_t bcl_20_31
= 0x429f0005;
1811 static const uint32_t bctr
= 0x4e800420;
1812 static const uint32_t blr
= 0x4e800020;
1813 static const uint32_t blrl
= 0x4e800021;
1814 static const uint32_t cror_15_15_15
= 0x4def7b82;
1815 static const uint32_t cror_31_31_31
= 0x4ffffb82;
1816 static const uint32_t ld_0_1
= 0xe8010000;
1817 static const uint32_t ld_0_12
= 0xe80c0000;
1818 static const uint32_t ld_11_12
= 0xe96c0000;
1819 static const uint32_t ld_11_2
= 0xe9620000;
1820 static const uint32_t ld_2_1
= 0xe8410000;
1821 static const uint32_t ld_2_11
= 0xe84b0000;
1822 static const uint32_t ld_2_12
= 0xe84c0000;
1823 static const uint32_t ld_2_2
= 0xe8420000;
1824 static const uint32_t lfd_0_1
= 0xc8010000;
1825 static const uint32_t li_0_0
= 0x38000000;
1826 static const uint32_t li_12_0
= 0x39800000;
1827 static const uint32_t lis_0_0
= 0x3c000000;
1828 static const uint32_t lis_11
= 0x3d600000;
1829 static const uint32_t lis_12
= 0x3d800000;
1830 static const uint32_t lwz_0_12
= 0x800c0000;
1831 static const uint32_t lwz_11_11
= 0x816b0000;
1832 static const uint32_t lwz_11_30
= 0x817e0000;
1833 static const uint32_t lwz_12_12
= 0x818c0000;
1834 static const uint32_t lwzu_0_12
= 0x840c0000;
1835 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
1836 static const uint32_t mflr_0
= 0x7c0802a6;
1837 static const uint32_t mflr_11
= 0x7d6802a6;
1838 static const uint32_t mflr_12
= 0x7d8802a6;
1839 static const uint32_t mtctr_0
= 0x7c0903a6;
1840 static const uint32_t mtctr_11
= 0x7d6903a6;
1841 static const uint32_t mtlr_0
= 0x7c0803a6;
1842 static const uint32_t mtlr_12
= 0x7d8803a6;
1843 static const uint32_t nop
= 0x60000000;
1844 static const uint32_t ori_0_0_0
= 0x60000000;
1845 static const uint32_t std_0_1
= 0xf8010000;
1846 static const uint32_t std_0_12
= 0xf80c0000;
1847 static const uint32_t std_2_1
= 0xf8410000;
1848 static const uint32_t stfd_0_1
= 0xd8010000;
1849 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
1850 static const uint32_t sub_11_11_12
= 0x7d6c5850;
1852 // Write out the PLT.
1854 template<int size
, bool big_endian
>
1856 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
1860 const off_t offset
= this->offset();
1861 const section_size_type oview_size
1862 = convert_to_section_size_type(this->data_size());
1863 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1864 unsigned char* pov
= oview
;
1865 unsigned char* endpov
= oview
+ oview_size
;
1867 // The address of the .glink branch table
1868 const Output_data_glink
<size
, big_endian
>* glink
1869 = this->targ_
->glink_section();
1870 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
1871 = glink
->address() + glink
->pltresolve();
1873 while (pov
< endpov
)
1875 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
1880 of
->write_output_view(offset
, oview_size
, oview
);
1884 // Create the PLT section.
1886 template<int size
, bool big_endian
>
1888 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
1891 if (this->plt_
== NULL
)
1893 if (this->got_
== NULL
)
1894 this->got_section(symtab
, layout
);
1896 if (this->glink_
== NULL
)
1897 make_glink_section(layout
);
1899 // Ensure that .rela.dyn always appears before .rela.plt This is
1900 // necessary due to how, on PowerPC and some other targets, .rela.dyn
1901 // needs to include .rela.plt in it's range.
1902 this->rela_dyn_section(layout
);
1904 Reloc_section
* plt_rel
= new Reloc_section(false);
1905 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
1906 elfcpp::SHF_ALLOC
, plt_rel
,
1907 ORDER_DYNAMIC_PLT_RELOCS
, false);
1909 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
1910 size
== 32 ? 0 : 24,
1912 layout
->add_output_section_data(".plt",
1914 ? elfcpp::SHT_PROGBITS
1915 : elfcpp::SHT_NOBITS
),
1916 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1925 // Create the IPLT section.
1927 template<int size
, bool big_endian
>
1929 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
1932 if (this->iplt_
== NULL
)
1934 this->make_plt_section(symtab
, layout
);
1936 Reloc_section
* iplt_rel
= new Reloc_section(false);
1937 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
1939 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
1941 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
1945 // A class to handle .glink.
1947 template<int size
, bool big_endian
>
1948 class Output_data_glink
: public Output_section_data
1951 static const int pltresolve_size
= 16*4;
1953 Output_data_glink(Target_powerpc
<size
, big_endian
>*);
1957 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1959 const elfcpp::Rela
<size
, big_endian
>&);
1962 add_entry(const Sized_relobj_file
<size
, big_endian
>*,
1964 const elfcpp::Rela
<size
, big_endian
>&);
1967 find_entry(const Symbol
*) const;
1970 find_entry(const Sized_relobj_file
<size
, big_endian
>*, unsigned int) const;
1973 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1975 const elfcpp::Rela
<size
, big_endian
>&) const;
1978 find_entry(const Sized_relobj_file
<size
, big_endian
>*,
1980 const elfcpp::Rela
<size
, big_endian
>&) const;
1983 glink_entry_size() const
1988 // FIXME: We should be using multiple glink sections for
1989 // stubs to support > 33M applications.
1996 return this->pltresolve_
;
2000 // Write to a map file.
2002 do_print_to_mapfile(Mapfile
* mapfile
) const
2003 { mapfile
->print_output_data(this, _("** glink")); }
2007 set_final_data_size();
2011 do_write(Output_file
*);
2016 Glink_sym_ent(const Symbol
* sym
)
2017 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2020 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2021 unsigned int locsym_index
)
2022 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2025 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2027 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2028 : sym_(sym
), object_(0), addend_(0), locsym_(0)
2031 this->addend_
= reloc
.get_r_addend();
2032 else if (parameters
->options().output_is_position_independent()
2033 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2034 == elfcpp::R_PPC_PLTREL24
))
2036 this->addend_
= reloc
.get_r_addend();
2037 if (this->addend_
>= 32768)
2038 this->object_
= object
;
2042 Glink_sym_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
2043 unsigned int locsym_index
,
2044 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2045 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
2048 this->addend_
= reloc
.get_r_addend();
2049 else if (parameters
->options().output_is_position_independent()
2050 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
2051 == elfcpp::R_PPC_PLTREL24
))
2052 this->addend_
= reloc
.get_r_addend();
2055 bool operator==(const Glink_sym_ent
& that
) const
2057 return (this->sym_
== that
.sym_
2058 && this->object_
== that
.object_
2059 && this->addend_
== that
.addend_
2060 && this->locsym_
== that
.locsym_
);
2064 const Sized_relobj_file
<size
, big_endian
>* object_
;
2065 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
2066 unsigned int locsym_
;
2069 class Glink_sym_ent_hash
2072 size_t operator()(const Glink_sym_ent
& ent
) const
2074 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
2075 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
2081 // Map sym/object/addend to index.
2082 typedef Unordered_map
<Glink_sym_ent
, unsigned int,
2083 Glink_sym_ent_hash
> Glink_entries
;
2084 Glink_entries glink_entries_
;
2086 // Offset of pltresolve stub (actually, branch table for 32-bit)
2089 // Allows access to .got and .plt for do_write.
2090 Target_powerpc
<size
, big_endian
>* targ_
;
2093 // Create the glink section.
2095 template<int size
, bool big_endian
>
2096 Output_data_glink
<size
, big_endian
>::Output_data_glink(
2097 Target_powerpc
<size
, big_endian
>* targ
)
2098 : Output_section_data(16),
2099 pltresolve_(0), targ_(targ
)
2103 // Add an entry to glink, if we do not already have one for this
2104 // sym/object/addend combo.
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
,
2111 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2113 Glink_sym_ent
ent(object
, gsym
, 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
>::add_entry(
2121 const Sized_relobj_file
<size
, big_endian
>* object
,
2122 unsigned int locsym_index
,
2123 const elfcpp::Rela
<size
, big_endian
>& reloc
)
2125 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
2126 unsigned int indx
= this->glink_entries_
.size();
2127 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
2130 template<int size
, bool big_endian
>
2132 Output_data_glink
<size
, big_endian
>::find_entry(
2133 const Sized_relobj_file
<size
, big_endian
>* object
,
2135 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2137 Glink_sym_ent
ent(object
, gsym
, reloc
);
2138 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2139 gold_assert(p
!= this->glink_entries_
.end());
2143 template<int size
, bool big_endian
>
2145 Output_data_glink
<size
, big_endian
>::find_entry(const Symbol
* gsym
) const
2147 Glink_sym_ent
ent(gsym
);
2148 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2149 gold_assert(p
!= this->glink_entries_
.end());
2153 template<int size
, bool big_endian
>
2155 Output_data_glink
<size
, big_endian
>::find_entry(
2156 const Sized_relobj_file
<size
, big_endian
>* object
,
2157 unsigned int locsym_index
,
2158 const elfcpp::Rela
<size
, big_endian
>& reloc
) const
2160 Glink_sym_ent
ent(object
, locsym_index
, reloc
);
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
>::find_entry(
2169 const Sized_relobj_file
<size
, big_endian
>* object
,
2170 unsigned int locsym_index
) const
2172 Glink_sym_ent
ent(object
, locsym_index
);
2173 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
2174 gold_assert(p
!= this->glink_entries_
.end());
2178 template<int size
, bool big_endian
>
2180 Output_data_glink
<size
, big_endian
>::set_final_data_size()
2182 unsigned int count
= this->glink_entries_
.size();
2183 off_t total
= count
;
2190 this->pltresolve_
= total
;
2192 // space for branch table
2193 total
+= 4 * (count
- 1);
2195 total
+= -total
& 15;
2196 total
+= this->pltresolve_size
;
2201 this->pltresolve_
= total
;
2202 total
+= this->pltresolve_size
;
2204 // space for branch table
2207 total
+= 4 * (count
- 0x8000);
2211 this->set_data_size(total
);
2214 static inline uint32_t
2220 static inline uint32_t
2226 static inline uint32_t
2229 return hi(a
+ 0x8000);
2232 template<bool big_endian
>
2234 write_insn(unsigned char* p
, uint32_t v
)
2236 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
2239 // Write out .glink.
2241 template<int size
, bool big_endian
>
2243 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
2245 const off_t off
= this->offset();
2246 const section_size_type oview_size
=
2247 convert_to_section_size_type(this->data_size());
2248 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2251 // The base address of the .plt section.
2252 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2253 static const Address invalid_address
= static_cast<Address
>(0) - 1;
2254 Address plt_base
= this->targ_
->plt_section()->address();
2255 Address iplt_base
= invalid_address
;
2257 const Output_data_got_powerpc
<size
, big_endian
>* got
2258 = this->targ_
->got_section();
2262 Address got_os_addr
= got
->output_section()->address();
2264 // Write out call stubs.
2265 typename
Glink_entries::const_iterator g
;
2266 for (g
= this->glink_entries_
.begin();
2267 g
!= this->glink_entries_
.end();
2272 const Symbol
* gsym
= g
->first
.sym_
;
2275 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2276 && gsym
->can_use_relative_reloc(false));
2277 plt_addr
= gsym
->plt_offset();
2282 const Sized_relobj_file
<size
, big_endian
>* relobj
2284 unsigned int local_sym_index
= g
->first
.locsym_
;
2285 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2289 if (iplt_base
== invalid_address
)
2290 iplt_base
= this->targ_
->iplt_section()->address();
2291 plt_addr
+= iplt_base
;
2294 plt_addr
+= plt_base
;
2295 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2296 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2297 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
2298 Address pltoff
= plt_addr
- got_addr
;
2300 if (pltoff
+ 0x80008000 > 0xffffffff || (pltoff
& 7) != 0)
2301 gold_error(_("%s: linkage table error against `%s'"),
2302 g
->first
.object_
->name().c_str(),
2303 g
->first
.sym_
->demangled_name().c_str());
2305 p
= oview
+ g
->second
* this->glink_entry_size();
2306 if (ha(pltoff
) != 0)
2308 write_insn
<big_endian
>(p
, addis_12_2
+ ha(pltoff
)), p
+= 4;
2309 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2310 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
)), p
+= 4;
2311 if (ha(pltoff
+ 16) != ha(pltoff
))
2313 write_insn
<big_endian
>(p
, addi_12_12
+ l(pltoff
)), p
+= 4;
2316 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2317 write_insn
<big_endian
>(p
, ld_2_12
+ l(pltoff
+ 8)), p
+= 4;
2318 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
+ 16)), p
+= 4;
2319 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2323 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
2324 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
)), p
+= 4;
2325 if (ha(pltoff
+ 16) != ha(pltoff
))
2327 write_insn
<big_endian
>(p
, addi_2_2
+ l(pltoff
)), p
+= 4;
2330 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2331 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
+ 16)), p
+= 4;
2332 write_insn
<big_endian
>(p
, ld_2_2
+ l(pltoff
+ 8)), p
+= 4;
2333 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2337 // Write pltresolve stub.
2338 p
= oview
+ this->pltresolve_
;
2339 Address after_bcl
= this->address() + this->pltresolve_
+ 16;
2340 Address pltoff
= plt_base
- after_bcl
;
2342 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
2344 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
2345 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
2346 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
2347 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
2348 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
2349 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
2350 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
2351 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
2352 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
2353 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
2354 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
2355 while (p
< oview
+ this->pltresolve_
+ this->pltresolve_size
)
2356 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2358 // Write lazy link call stubs.
2360 while (p
< oview
+ oview_size
)
2364 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
2368 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
2369 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
2371 uint32_t branch_off
= this->pltresolve_
+ 8 - (p
- oview
);
2372 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
2378 // The address of _GLOBAL_OFFSET_TABLE_.
2379 Address g_o_t
= got
->address() + got
->g_o_t();
2381 // Write out call stubs.
2382 typename
Glink_entries::const_iterator g
;
2383 for (g
= this->glink_entries_
.begin();
2384 g
!= this->glink_entries_
.end();
2389 const Symbol
* gsym
= g
->first
.sym_
;
2392 is_ifunc
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
2393 && gsym
->can_use_relative_reloc(false));
2394 plt_addr
= gsym
->plt_offset();
2399 const Sized_relobj_file
<size
, big_endian
>* relobj
2401 unsigned int local_sym_index
= g
->first
.locsym_
;
2402 plt_addr
= relobj
->local_plt_offset(local_sym_index
);
2406 if (iplt_base
== invalid_address
)
2407 iplt_base
= this->targ_
->iplt_section()->address();
2408 plt_addr
+= iplt_base
;
2411 plt_addr
+= plt_base
;
2413 p
= oview
+ g
->second
* this->glink_entry_size();
2414 if (parameters
->options().output_is_position_independent())
2417 const Powerpc_relobj
<size
, big_endian
>* object
= static_cast
2418 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
2419 if (object
!= NULL
&& g
->first
.addend_
>= 32768)
2421 unsigned int got2
= object
->got2_shndx();
2422 got_addr
= g
->first
.object_
->get_output_section_offset(got2
);
2423 gold_assert(got_addr
!= invalid_address
);
2424 got_addr
+= (g
->first
.object_
->output_section(got2
)->address()
2425 + g
->first
.addend_
);
2430 Address pltoff
= plt_addr
- got_addr
;
2431 if (ha(pltoff
) == 0)
2433 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(pltoff
));
2434 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
2435 write_insn
<big_endian
>(p
+ 8, bctr
);
2439 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(pltoff
));
2440 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(pltoff
));
2441 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2442 write_insn
<big_endian
>(p
+ 12, bctr
);
2447 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
2448 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
2449 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
2450 write_insn
<big_endian
>(p
+ 12, bctr
);
2454 // Write out pltresolve branch table.
2455 p
= oview
+ this->pltresolve_
;
2456 unsigned int the_end
= oview_size
- this->pltresolve_size
;
2457 unsigned char* end_p
= oview
+ the_end
;
2458 while (p
< end_p
- 8 * 4)
2459 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
2461 write_insn
<big_endian
>(p
, nop
), p
+= 4;
2463 // Write out pltresolve call stub.
2464 if (parameters
->options().output_is_position_independent())
2466 Address res0_off
= this->pltresolve_
;
2467 Address after_bcl_off
= the_end
+ 12;
2468 Address bcl_res0
= after_bcl_off
- res0_off
;
2470 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
2471 write_insn
<big_endian
>(p
+ 4, mflr_0
);
2472 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
2473 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
2474 write_insn
<big_endian
>(p
+ 16, mflr_12
);
2475 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
2476 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
2478 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
2480 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
2481 if (ha(got_bcl
) == ha(got_bcl
+ 4))
2483 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
2484 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
2488 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
2489 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
2491 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
2492 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
2493 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
2494 write_insn
<big_endian
>(p
+ 52, bctr
);
2495 write_insn
<big_endian
>(p
+ 56, nop
);
2496 write_insn
<big_endian
>(p
+ 60, nop
);
2500 Address res0
= this->pltresolve_
+ this->address();
2502 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
2503 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
2504 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2505 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
2507 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
2508 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
2509 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
2510 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
2511 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
2512 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
2514 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
2515 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
2516 write_insn
<big_endian
>(p
+ 32, bctr
);
2517 write_insn
<big_endian
>(p
+ 36, nop
);
2518 write_insn
<big_endian
>(p
+ 40, nop
);
2519 write_insn
<big_endian
>(p
+ 44, nop
);
2520 write_insn
<big_endian
>(p
+ 48, nop
);
2521 write_insn
<big_endian
>(p
+ 52, nop
);
2522 write_insn
<big_endian
>(p
+ 56, nop
);
2523 write_insn
<big_endian
>(p
+ 60, nop
);
2528 of
->write_output_view(off
, oview_size
, oview
);
2532 // A class to handle linker generated save/restore functions.
2534 template<int size
, bool big_endian
>
2535 class Output_data_save_res
: public Output_section_data_build
2538 Output_data_save_res(Symbol_table
* symtab
);
2541 // Write to a map file.
2543 do_print_to_mapfile(Mapfile
* mapfile
) const
2544 { mapfile
->print_output_data(this, _("** save/restore")); }
2547 do_write(Output_file
*);
2550 // The maximum size of save/restore contents.
2551 static const unsigned int savres_max
= 218*4;
2554 savres_define(Symbol_table
* symtab
,
2556 unsigned int lo
, unsigned int hi
,
2557 unsigned char* write_ent(unsigned char*, int),
2558 unsigned char* write_tail(unsigned char*, int));
2560 unsigned char *contents_
;
2563 template<bool big_endian
>
2564 static unsigned char*
2565 savegpr0(unsigned char* p
, int r
)
2567 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2568 write_insn
<big_endian
>(p
, insn
);
2572 template<bool big_endian
>
2573 static unsigned char*
2574 savegpr0_tail(unsigned char* p
, int r
)
2576 p
= savegpr0
<big_endian
>(p
, r
);
2577 uint32_t insn
= std_0_1
+ 16;
2578 write_insn
<big_endian
>(p
, insn
);
2580 write_insn
<big_endian
>(p
, blr
);
2584 template<bool big_endian
>
2585 static unsigned char*
2586 restgpr0(unsigned char* p
, int r
)
2588 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2589 write_insn
<big_endian
>(p
, insn
);
2593 template<bool big_endian
>
2594 static unsigned char*
2595 restgpr0_tail(unsigned char* p
, int r
)
2597 uint32_t insn
= ld_0_1
+ 16;
2598 write_insn
<big_endian
>(p
, insn
);
2600 p
= restgpr0
<big_endian
>(p
, r
);
2601 write_insn
<big_endian
>(p
, mtlr_0
);
2605 p
= restgpr0
<big_endian
>(p
, 30);
2606 p
= restgpr0
<big_endian
>(p
, 31);
2608 write_insn
<big_endian
>(p
, blr
);
2612 template<bool big_endian
>
2613 static unsigned char*
2614 savegpr1(unsigned char* p
, int r
)
2616 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2617 write_insn
<big_endian
>(p
, insn
);
2621 template<bool big_endian
>
2622 static unsigned char*
2623 savegpr1_tail(unsigned char* p
, int r
)
2625 p
= savegpr1
<big_endian
>(p
, r
);
2626 write_insn
<big_endian
>(p
, blr
);
2630 template<bool big_endian
>
2631 static unsigned char*
2632 restgpr1(unsigned char* p
, int r
)
2634 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2635 write_insn
<big_endian
>(p
, insn
);
2639 template<bool big_endian
>
2640 static unsigned char*
2641 restgpr1_tail(unsigned char* p
, int r
)
2643 p
= restgpr1
<big_endian
>(p
, r
);
2644 write_insn
<big_endian
>(p
, blr
);
2648 template<bool big_endian
>
2649 static unsigned char*
2650 savefpr(unsigned char* p
, int r
)
2652 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2653 write_insn
<big_endian
>(p
, insn
);
2657 template<bool big_endian
>
2658 static unsigned char*
2659 savefpr0_tail(unsigned char* p
, int r
)
2661 p
= savefpr
<big_endian
>(p
, r
);
2662 write_insn
<big_endian
>(p
, std_0_1
+ 16);
2664 write_insn
<big_endian
>(p
, blr
);
2668 template<bool big_endian
>
2669 static unsigned char*
2670 restfpr(unsigned char* p
, int r
)
2672 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
2673 write_insn
<big_endian
>(p
, insn
);
2677 template<bool big_endian
>
2678 static unsigned char*
2679 restfpr0_tail(unsigned char* p
, int r
)
2681 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
2683 p
= restfpr
<big_endian
>(p
, r
);
2684 write_insn
<big_endian
>(p
, mtlr_0
);
2688 p
= restfpr
<big_endian
>(p
, 30);
2689 p
= restfpr
<big_endian
>(p
, 31);
2691 write_insn
<big_endian
>(p
, blr
);
2695 template<bool big_endian
>
2696 static unsigned char*
2697 savefpr1_tail(unsigned char* p
, int r
)
2699 p
= savefpr
<big_endian
>(p
, r
);
2700 write_insn
<big_endian
>(p
, blr
);
2704 template<bool big_endian
>
2705 static unsigned char*
2706 restfpr1_tail(unsigned char* p
, int r
)
2708 p
= restfpr
<big_endian
>(p
, r
);
2709 write_insn
<big_endian
>(p
, blr
);
2713 template<bool big_endian
>
2714 static unsigned char*
2715 savevr(unsigned char* p
, int r
)
2717 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2718 write_insn
<big_endian
>(p
, insn
);
2720 insn
= stvx_0_12_0
+ (r
<< 21);
2721 write_insn
<big_endian
>(p
, insn
);
2725 template<bool big_endian
>
2726 static unsigned char*
2727 savevr_tail(unsigned char* p
, int r
)
2729 p
= savevr
<big_endian
>(p
, r
);
2730 write_insn
<big_endian
>(p
, blr
);
2734 template<bool big_endian
>
2735 static unsigned char*
2736 restvr(unsigned char* p
, int r
)
2738 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
2739 write_insn
<big_endian
>(p
, insn
);
2741 insn
= lvx_0_12_0
+ (r
<< 21);
2742 write_insn
<big_endian
>(p
, insn
);
2746 template<bool big_endian
>
2747 static unsigned char*
2748 restvr_tail(unsigned char* p
, int r
)
2750 p
= restvr
<big_endian
>(p
, r
);
2751 write_insn
<big_endian
>(p
, blr
);
2756 template<int size
, bool big_endian
>
2757 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
2758 Symbol_table
* symtab
)
2759 : Output_section_data_build(4),
2762 this->savres_define(symtab
,
2763 "_savegpr0_", 14, 31,
2764 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
2765 this->savres_define(symtab
,
2766 "_restgpr0_", 14, 29,
2767 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2768 this->savres_define(symtab
,
2769 "_restgpr0_", 30, 31,
2770 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
2771 this->savres_define(symtab
,
2772 "_savegpr1_", 14, 31,
2773 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
2774 this->savres_define(symtab
,
2775 "_restgpr1_", 14, 31,
2776 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
2777 this->savres_define(symtab
,
2778 "_savefpr_", 14, 31,
2779 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
2780 this->savres_define(symtab
,
2781 "_restfpr_", 14, 29,
2782 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2783 this->savres_define(symtab
,
2784 "_restfpr_", 30, 31,
2785 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
2786 this->savres_define(symtab
,
2788 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
2789 this->savres_define(symtab
,
2791 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
2792 this->savres_define(symtab
,
2794 savevr
<big_endian
>, savevr_tail
<big_endian
>);
2795 this->savres_define(symtab
,
2797 restvr
<big_endian
>, restvr_tail
<big_endian
>);
2800 template<int size
, bool big_endian
>
2802 Output_data_save_res
<size
, big_endian
>::savres_define(
2803 Symbol_table
* symtab
,
2805 unsigned int lo
, unsigned int hi
,
2806 unsigned char* write_ent(unsigned char*, int),
2807 unsigned char* write_tail(unsigned char*, int))
2809 size_t len
= strlen(name
);
2810 bool writing
= false;
2813 memcpy(sym
, name
, len
);
2816 for (unsigned int i
= lo
; i
<= hi
; i
++)
2818 sym
[len
+ 0] = i
/ 10 + '0';
2819 sym
[len
+ 1] = i
% 10 + '0';
2820 Symbol
* gsym
= symtab
->lookup(sym
);
2821 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
2822 writing
= writing
|| refd
;
2825 if (this->contents_
== NULL
)
2826 this->contents_
= new unsigned char[this->savres_max
];
2828 off_t value
= this->current_data_size();
2829 unsigned char* p
= this->contents_
+ value
;
2831 p
= write_ent(p
, i
);
2833 p
= write_tail(p
, i
);
2834 off_t cur_size
= p
- this->contents_
;
2835 this->set_current_data_size(cur_size
);
2837 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
2838 this, value
, cur_size
- value
,
2839 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
2840 elfcpp::STV_HIDDEN
, 0, false, false);
2845 // Write out save/restore.
2847 template<int size
, bool big_endian
>
2849 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
2851 const off_t off
= this->offset();
2852 const section_size_type oview_size
=
2853 convert_to_section_size_type(this->data_size());
2854 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
2855 memcpy(oview
, this->contents_
, oview_size
);
2856 of
->write_output_view(off
, oview_size
, oview
);
2860 // Create the glink section.
2862 template<int size
, bool big_endian
>
2864 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
2866 if (this->glink_
== NULL
)
2868 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
2869 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
2870 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
2871 this->glink_
, ORDER_TEXT
, false);
2875 // Create a PLT entry for a global symbol.
2877 template<int size
, bool big_endian
>
2879 Target_powerpc
<size
, big_endian
>::make_plt_entry(
2880 Symbol_table
* symtab
,
2883 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2884 const Sized_relobj_file
<size
, big_endian
>* object
)
2886 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
2887 && gsym
->can_use_relative_reloc(false))
2889 if (this->iplt_
== NULL
)
2890 this->make_iplt_section(symtab
, layout
);
2891 this->iplt_
->add_ifunc_entry(gsym
);
2895 if (this->plt_
== NULL
)
2896 this->make_plt_section(symtab
, layout
);
2897 this->plt_
->add_entry(gsym
);
2899 this->glink_
->add_entry(object
, gsym
, reloc
);
2902 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
2904 template<int size
, bool big_endian
>
2906 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
2907 Symbol_table
* symtab
,
2909 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2910 Sized_relobj_file
<size
, big_endian
>* relobj
)
2912 if (this->iplt_
== NULL
)
2913 this->make_iplt_section(symtab
, layout
);
2914 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2915 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
2916 this->glink_
->add_entry(relobj
, r_sym
, reloc
);
2919 // Return the number of entries in the PLT.
2921 template<int size
, bool big_endian
>
2923 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
2925 if (this->plt_
== NULL
)
2927 unsigned int count
= this->plt_
->entry_count();
2928 if (this->iplt_
!= NULL
)
2929 count
+= this->iplt_
->entry_count();
2933 // Return the offset of the first non-reserved PLT entry.
2935 template<int size
, bool big_endian
>
2937 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
2939 return this->plt_
->first_plt_entry_offset();
2942 // Return the size of each PLT entry.
2944 template<int size
, bool big_endian
>
2946 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
2948 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
2951 // Create a GOT entry for local dynamic __tls_get_addr calls.
2953 template<int size
, bool big_endian
>
2955 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
2956 Symbol_table
* symtab
,
2958 Sized_relobj_file
<size
, big_endian
>* object
)
2960 if (this->tlsld_got_offset_
== -1U)
2962 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
2963 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
2964 Output_data_got_powerpc
<size
, big_endian
>* got
2965 = this->got_section(symtab
, layout
);
2966 unsigned int got_offset
= got
->add_constant_pair(0, 0);
2967 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
2969 this->tlsld_got_offset_
= got_offset
;
2971 return this->tlsld_got_offset_
;
2974 // Get the Reference_flags for a particular relocation.
2976 template<int size
, bool big_endian
>
2978 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
2982 case elfcpp::R_POWERPC_NONE
:
2983 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2984 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2985 case elfcpp::R_PPC64_TOC
:
2986 // No symbol reference.
2989 case elfcpp::R_PPC64_ADDR64
:
2990 case elfcpp::R_PPC64_UADDR64
:
2991 case elfcpp::R_POWERPC_ADDR32
:
2992 case elfcpp::R_POWERPC_UADDR32
:
2993 case elfcpp::R_POWERPC_ADDR16
:
2994 case elfcpp::R_POWERPC_UADDR16
:
2995 case elfcpp::R_POWERPC_ADDR16_LO
:
2996 case elfcpp::R_POWERPC_ADDR16_HI
:
2997 case elfcpp::R_POWERPC_ADDR16_HA
:
2998 return Symbol::ABSOLUTE_REF
;
3000 case elfcpp::R_POWERPC_ADDR24
:
3001 case elfcpp::R_POWERPC_ADDR14
:
3002 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3003 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3004 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
3006 case elfcpp::R_PPC64_REL64
:
3007 case elfcpp::R_POWERPC_REL32
:
3008 case elfcpp::R_PPC_LOCAL24PC
:
3009 case elfcpp::R_POWERPC_REL16
:
3010 case elfcpp::R_POWERPC_REL16_LO
:
3011 case elfcpp::R_POWERPC_REL16_HI
:
3012 case elfcpp::R_POWERPC_REL16_HA
:
3013 return Symbol::RELATIVE_REF
;
3015 case elfcpp::R_POWERPC_REL24
:
3016 case elfcpp::R_PPC_PLTREL24
:
3017 case elfcpp::R_POWERPC_REL14
:
3018 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3019 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3020 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
3022 case elfcpp::R_POWERPC_GOT16
:
3023 case elfcpp::R_POWERPC_GOT16_LO
:
3024 case elfcpp::R_POWERPC_GOT16_HI
:
3025 case elfcpp::R_POWERPC_GOT16_HA
:
3026 case elfcpp::R_PPC64_GOT16_DS
:
3027 case elfcpp::R_PPC64_GOT16_LO_DS
:
3028 case elfcpp::R_PPC64_TOC16
:
3029 case elfcpp::R_PPC64_TOC16_LO
:
3030 case elfcpp::R_PPC64_TOC16_HI
:
3031 case elfcpp::R_PPC64_TOC16_HA
:
3032 case elfcpp::R_PPC64_TOC16_DS
:
3033 case elfcpp::R_PPC64_TOC16_LO_DS
:
3035 return Symbol::ABSOLUTE_REF
;
3037 case elfcpp::R_POWERPC_GOT_TPREL16
:
3038 case elfcpp::R_POWERPC_TLS
:
3039 return Symbol::TLS_REF
;
3041 case elfcpp::R_POWERPC_COPY
:
3042 case elfcpp::R_POWERPC_GLOB_DAT
:
3043 case elfcpp::R_POWERPC_JMP_SLOT
:
3044 case elfcpp::R_POWERPC_RELATIVE
:
3045 case elfcpp::R_POWERPC_DTPMOD
:
3047 // Not expected. We will give an error later.
3052 // Report an unsupported relocation against a local symbol.
3054 template<int size
, bool big_endian
>
3056 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
3057 Sized_relobj_file
<size
, big_endian
>* object
,
3058 unsigned int r_type
)
3060 gold_error(_("%s: unsupported reloc %u against local symbol"),
3061 object
->name().c_str(), r_type
);
3064 // We are about to emit a dynamic relocation of type R_TYPE. If the
3065 // dynamic linker does not support it, issue an error.
3067 template<int size
, bool big_endian
>
3069 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
3070 unsigned int r_type
)
3072 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
3074 // These are the relocation types supported by glibc for both 32-bit
3075 // and 64-bit powerpc.
3078 case elfcpp::R_POWERPC_NONE
:
3079 case elfcpp::R_POWERPC_RELATIVE
:
3080 case elfcpp::R_POWERPC_GLOB_DAT
:
3081 case elfcpp::R_POWERPC_DTPMOD
:
3082 case elfcpp::R_POWERPC_DTPREL
:
3083 case elfcpp::R_POWERPC_TPREL
:
3084 case elfcpp::R_POWERPC_JMP_SLOT
:
3085 case elfcpp::R_POWERPC_COPY
:
3086 case elfcpp::R_POWERPC_IRELATIVE
:
3087 case elfcpp::R_POWERPC_ADDR32
:
3088 case elfcpp::R_POWERPC_UADDR32
:
3089 case elfcpp::R_POWERPC_ADDR24
:
3090 case elfcpp::R_POWERPC_ADDR16
:
3091 case elfcpp::R_POWERPC_UADDR16
:
3092 case elfcpp::R_POWERPC_ADDR16_LO
:
3093 case elfcpp::R_POWERPC_ADDR16_HI
:
3094 case elfcpp::R_POWERPC_ADDR16_HA
:
3095 case elfcpp::R_POWERPC_ADDR14
:
3096 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3097 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3098 case elfcpp::R_POWERPC_REL32
:
3099 case elfcpp::R_POWERPC_REL24
:
3100 case elfcpp::R_POWERPC_TPREL16
:
3101 case elfcpp::R_POWERPC_TPREL16_LO
:
3102 case elfcpp::R_POWERPC_TPREL16_HI
:
3103 case elfcpp::R_POWERPC_TPREL16_HA
:
3114 // These are the relocation types supported only on 64-bit.
3115 case elfcpp::R_PPC64_ADDR64
:
3116 case elfcpp::R_PPC64_UADDR64
:
3117 case elfcpp::R_PPC64_JMP_IREL
:
3118 case elfcpp::R_PPC64_ADDR16_DS
:
3119 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3120 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3121 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3122 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3123 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3124 case elfcpp::R_PPC64_REL64
:
3125 case elfcpp::R_POWERPC_ADDR30
:
3126 case elfcpp::R_PPC64_TPREL16_DS
:
3127 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3128 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3129 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3130 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3131 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3142 // These are the relocation types supported only on 32-bit.
3143 // ??? glibc ld.so doesn't need to support these.
3144 case elfcpp::R_POWERPC_DTPREL16
:
3145 case elfcpp::R_POWERPC_DTPREL16_LO
:
3146 case elfcpp::R_POWERPC_DTPREL16_HI
:
3147 case elfcpp::R_POWERPC_DTPREL16_HA
:
3155 // This prevents us from issuing more than one error per reloc
3156 // section. But we can still wind up issuing more than one
3157 // error per object file.
3158 if (this->issued_non_pic_error_
)
3160 gold_assert(parameters
->options().output_is_position_independent());
3161 object
->error(_("requires unsupported dynamic reloc; "
3162 "recompile with -fPIC"));
3163 this->issued_non_pic_error_
= true;
3167 // Return whether we need to make a PLT entry for a relocation of the
3168 // given type against a STT_GNU_IFUNC symbol.
3170 template<int size
, bool big_endian
>
3172 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
3173 Sized_relobj_file
<size
, big_endian
>* object
,
3174 unsigned int r_type
)
3176 // In non-pic code any reference will resolve to the plt call stub
3177 // for the ifunc symbol.
3178 if (size
== 32 && !parameters
->options().output_is_position_independent())
3183 // Word size refs from data sections are OK.
3184 case elfcpp::R_POWERPC_ADDR32
:
3185 case elfcpp::R_POWERPC_UADDR32
:
3190 case elfcpp::R_PPC64_ADDR64
:
3191 case elfcpp::R_PPC64_UADDR64
:
3196 // GOT refs are good.
3197 case elfcpp::R_POWERPC_GOT16
:
3198 case elfcpp::R_POWERPC_GOT16_LO
:
3199 case elfcpp::R_POWERPC_GOT16_HI
:
3200 case elfcpp::R_POWERPC_GOT16_HA
:
3201 case elfcpp::R_PPC64_GOT16_DS
:
3202 case elfcpp::R_PPC64_GOT16_LO_DS
:
3205 // So are function calls.
3206 case elfcpp::R_POWERPC_ADDR24
:
3207 case elfcpp::R_POWERPC_ADDR14
:
3208 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3209 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3210 case elfcpp::R_POWERPC_REL24
:
3211 case elfcpp::R_PPC_PLTREL24
:
3212 case elfcpp::R_POWERPC_REL14
:
3213 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3214 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3221 // Anything else is a problem.
3222 // If we are building a static executable, the libc startup function
3223 // responsible for applying indirect function relocations is going
3224 // to complain about the reloc type.
3225 // If we are building a dynamic executable, we will have a text
3226 // relocation. The dynamic loader will set the text segment
3227 // writable and non-executable to apply text relocations. So we'll
3228 // segfault when trying to run the indirection function to resolve
3230 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
3231 object
->name().c_str(), r_type
);
3235 // Scan a relocation for a local symbol.
3237 template<int size
, bool big_endian
>
3239 Target_powerpc
<size
, big_endian
>::Scan::local(
3240 Symbol_table
* symtab
,
3242 Target_powerpc
<size
, big_endian
>* target
,
3243 Sized_relobj_file
<size
, big_endian
>* object
,
3244 unsigned int data_shndx
,
3245 Output_section
* output_section
,
3246 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3247 unsigned int r_type
,
3248 const elfcpp::Sym
<size
, big_endian
>& lsym
,
3251 Powerpc_relobj
<size
, big_endian
>* ppc_object
3252 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3257 && data_shndx
== ppc_object
->opd_shndx()
3258 && r_type
== elfcpp::R_PPC64_ADDR64
)
3259 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3263 // A local STT_GNU_IFUNC symbol may require a PLT entry.
3264 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
3265 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
3267 target
->make_local_ifunc_plt_entry(symtab
, layout
, reloc
, object
);
3272 case elfcpp::R_POWERPC_NONE
:
3273 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3274 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3275 case elfcpp::R_PPC64_TOCSAVE
:
3276 case elfcpp::R_PPC_EMB_MRKREF
:
3277 case elfcpp::R_POWERPC_TLS
:
3280 case elfcpp::R_PPC64_TOC
:
3282 Output_data_got_powerpc
<size
, big_endian
>* got
3283 = target
->got_section(symtab
, layout
);
3284 if (parameters
->options().output_is_position_independent())
3286 Address off
= reloc
.get_r_offset();
3288 && data_shndx
== ppc_object
->opd_shndx()
3289 && ppc_object
->get_opd_discard(off
- 8))
3292 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3293 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3294 rela_dyn
->add_output_section_relative(got
->output_section(),
3295 elfcpp::R_POWERPC_RELATIVE
,
3297 object
, data_shndx
, off
,
3298 symobj
->toc_base_offset());
3303 case elfcpp::R_PPC64_ADDR64
:
3304 case elfcpp::R_PPC64_UADDR64
:
3305 case elfcpp::R_POWERPC_ADDR32
:
3306 case elfcpp::R_POWERPC_UADDR32
:
3307 case elfcpp::R_POWERPC_ADDR24
:
3308 case elfcpp::R_POWERPC_ADDR16
:
3309 case elfcpp::R_POWERPC_ADDR16_LO
:
3310 case elfcpp::R_POWERPC_ADDR16_HI
:
3311 case elfcpp::R_POWERPC_ADDR16_HA
:
3312 case elfcpp::R_POWERPC_UADDR16
:
3313 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3314 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3315 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3316 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3317 case elfcpp::R_PPC64_ADDR16_DS
:
3318 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3319 case elfcpp::R_POWERPC_ADDR14
:
3320 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3321 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3322 // If building a shared library (or a position-independent
3323 // executable), we need to create a dynamic relocation for
3325 if (parameters
->options().output_is_position_independent()
3326 || (size
== 64 && is_ifunc
))
3328 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3330 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
3331 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
3333 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3334 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3337 rela_dyn
= target
->iplt_section()->rel_plt();
3338 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3340 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3341 output_section
, data_shndx
,
3342 reloc
.get_r_offset(),
3343 reloc
.get_r_addend(), false);
3347 check_non_pic(object
, r_type
);
3348 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3349 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
3350 data_shndx
, reloc
.get_r_offset(),
3351 reloc
.get_r_addend());
3356 case elfcpp::R_PPC64_REL64
:
3357 case elfcpp::R_POWERPC_REL32
:
3358 case elfcpp::R_POWERPC_REL24
:
3359 case elfcpp::R_PPC_PLTREL24
:
3360 case elfcpp::R_PPC_LOCAL24PC
:
3361 case elfcpp::R_POWERPC_REL16
:
3362 case elfcpp::R_POWERPC_REL16_LO
:
3363 case elfcpp::R_POWERPC_REL16_HI
:
3364 case elfcpp::R_POWERPC_REL16_HA
:
3365 case elfcpp::R_POWERPC_REL14
:
3366 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3367 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3368 case elfcpp::R_POWERPC_SECTOFF
:
3369 case elfcpp::R_POWERPC_TPREL16
:
3370 case elfcpp::R_POWERPC_DTPREL16
:
3371 case elfcpp::R_POWERPC_SECTOFF_LO
:
3372 case elfcpp::R_POWERPC_TPREL16_LO
:
3373 case elfcpp::R_POWERPC_DTPREL16_LO
:
3374 case elfcpp::R_POWERPC_SECTOFF_HI
:
3375 case elfcpp::R_POWERPC_TPREL16_HI
:
3376 case elfcpp::R_POWERPC_DTPREL16_HI
:
3377 case elfcpp::R_POWERPC_SECTOFF_HA
:
3378 case elfcpp::R_POWERPC_TPREL16_HA
:
3379 case elfcpp::R_POWERPC_DTPREL16_HA
:
3380 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3381 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3382 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3383 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3384 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3385 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3386 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3387 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3388 case elfcpp::R_PPC64_TPREL16_DS
:
3389 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3390 case elfcpp::R_PPC64_DTPREL16_DS
:
3391 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3392 case elfcpp::R_PPC64_SECTOFF_DS
:
3393 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3394 case elfcpp::R_PPC64_TLSGD
:
3395 case elfcpp::R_PPC64_TLSLD
:
3398 case elfcpp::R_POWERPC_GOT16
:
3399 case elfcpp::R_POWERPC_GOT16_LO
:
3400 case elfcpp::R_POWERPC_GOT16_HI
:
3401 case elfcpp::R_POWERPC_GOT16_HA
:
3402 case elfcpp::R_PPC64_GOT16_DS
:
3403 case elfcpp::R_PPC64_GOT16_LO_DS
:
3405 // The symbol requires a GOT entry.
3406 Output_data_got_powerpc
<size
, big_endian
>* got
3407 = target
->got_section(symtab
, layout
);
3408 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3410 if (!parameters
->options().output_is_position_independent())
3412 if (size
== 32 && is_ifunc
)
3413 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
3415 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
3417 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
3419 // If we are generating a shared object or a pie, this
3420 // symbol's GOT entry will be set by a dynamic relocation.
3422 off
= got
->add_constant(0);
3423 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
3425 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3426 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3429 rela_dyn
= target
->iplt_section()->rel_plt();
3430 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3432 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
3433 got
, off
, 0, false);
3438 case elfcpp::R_PPC64_TOC16
:
3439 case elfcpp::R_PPC64_TOC16_LO
:
3440 case elfcpp::R_PPC64_TOC16_HI
:
3441 case elfcpp::R_PPC64_TOC16_HA
:
3442 case elfcpp::R_PPC64_TOC16_DS
:
3443 case elfcpp::R_PPC64_TOC16_LO_DS
:
3444 // We need a GOT section.
3445 target
->got_section(symtab
, layout
);
3448 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3449 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3450 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3451 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3453 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
3454 if (tls_type
== tls::TLSOPT_NONE
)
3456 Output_data_got_powerpc
<size
, big_endian
>* got
3457 = target
->got_section(symtab
, layout
);
3458 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3459 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3460 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
3461 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
3463 else if (tls_type
== tls::TLSOPT_TO_LE
)
3465 // no GOT relocs needed for Local Exec.
3472 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3473 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3474 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3475 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3477 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3478 if (tls_type
== tls::TLSOPT_NONE
)
3479 target
->tlsld_got_offset(symtab
, layout
, object
);
3480 else if (tls_type
== tls::TLSOPT_TO_LE
)
3482 // no GOT relocs needed for Local Exec.
3483 if (parameters
->options().emit_relocs())
3485 Output_section
* os
= layout
->tls_segment()->first_section();
3486 gold_assert(os
!= NULL
);
3487 os
->set_needs_symtab_index();
3495 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3496 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3497 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3498 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3500 Output_data_got_powerpc
<size
, big_endian
>* got
3501 = target
->got_section(symtab
, layout
);
3502 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3503 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
3507 case elfcpp::R_POWERPC_GOT_TPREL16
:
3508 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3509 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3510 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3512 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
3513 if (tls_type
== tls::TLSOPT_NONE
)
3515 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
3516 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
3518 Output_data_got_powerpc
<size
, big_endian
>* got
3519 = target
->got_section(symtab
, layout
);
3520 unsigned int off
= got
->add_constant(0);
3521 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
3523 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3524 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
3525 elfcpp::R_POWERPC_TPREL
,
3529 else if (tls_type
== tls::TLSOPT_TO_LE
)
3531 // no GOT relocs needed for Local Exec.
3539 unsupported_reloc_local(object
, r_type
);
3544 // Report an unsupported relocation against a global symbol.
3546 template<int size
, bool big_endian
>
3548 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
3549 Sized_relobj_file
<size
, big_endian
>* object
,
3550 unsigned int r_type
,
3553 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
3554 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
3557 // Scan a relocation for a global symbol.
3559 template<int size
, bool big_endian
>
3561 Target_powerpc
<size
, big_endian
>::Scan::global(
3562 Symbol_table
* symtab
,
3564 Target_powerpc
<size
, big_endian
>* target
,
3565 Sized_relobj_file
<size
, big_endian
>* object
,
3566 unsigned int data_shndx
,
3567 Output_section
* output_section
,
3568 const elfcpp::Rela
<size
, big_endian
>& reloc
,
3569 unsigned int r_type
,
3572 Powerpc_relobj
<size
, big_endian
>* ppc_object
3573 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3575 // A STT_GNU_IFUNC symbol may require a PLT entry.
3576 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
3577 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
3578 target
->make_plt_entry(symtab
, layout
, gsym
, reloc
, object
);
3582 case elfcpp::R_POWERPC_NONE
:
3583 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3584 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3585 case elfcpp::R_PPC_LOCAL24PC
:
3586 case elfcpp::R_PPC_EMB_MRKREF
:
3587 case elfcpp::R_POWERPC_TLS
:
3590 case elfcpp::R_PPC64_TOC
:
3592 Output_data_got_powerpc
<size
, big_endian
>* got
3593 = target
->got_section(symtab
, layout
);
3594 if (parameters
->options().output_is_position_independent())
3596 Address off
= reloc
.get_r_offset();
3598 && data_shndx
== ppc_object
->opd_shndx()
3599 && ppc_object
->get_opd_discard(off
- 8))
3602 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3603 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
3604 if (data_shndx
!= ppc_object
->opd_shndx())
3605 symobj
= static_cast
3606 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
3607 rela_dyn
->add_output_section_relative(got
->output_section(),
3608 elfcpp::R_POWERPC_RELATIVE
,
3610 object
, data_shndx
, off
,
3611 symobj
->toc_base_offset());
3616 case elfcpp::R_PPC64_ADDR64
:
3618 && data_shndx
== ppc_object
->opd_shndx()
3619 && (gsym
->is_defined_in_discarded_section()
3620 || gsym
->object() != object
))
3622 ppc_object
->set_opd_discard(reloc
.get_r_offset());
3626 case elfcpp::R_PPC64_UADDR64
:
3627 case elfcpp::R_POWERPC_ADDR32
:
3628 case elfcpp::R_POWERPC_UADDR32
:
3629 case elfcpp::R_POWERPC_ADDR24
:
3630 case elfcpp::R_POWERPC_ADDR16
:
3631 case elfcpp::R_POWERPC_ADDR16_LO
:
3632 case elfcpp::R_POWERPC_ADDR16_HI
:
3633 case elfcpp::R_POWERPC_ADDR16_HA
:
3634 case elfcpp::R_POWERPC_UADDR16
:
3635 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3636 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3637 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3638 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3639 case elfcpp::R_PPC64_ADDR16_DS
:
3640 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3641 case elfcpp::R_POWERPC_ADDR14
:
3642 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3643 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3645 // Make a PLT entry if necessary.
3646 if (gsym
->needs_plt_entry())
3648 target
->make_plt_entry(symtab
, layout
, gsym
, reloc
, 0);
3649 // Since this is not a PC-relative relocation, we may be
3650 // taking the address of a function. In that case we need to
3651 // set the entry in the dynamic symbol table to the address of
3652 // the PLT call stub.
3654 && gsym
->is_from_dynobj()
3655 && !parameters
->options().output_is_position_independent())
3656 gsym
->set_needs_dynsym_value();
3658 // Make a dynamic relocation if necessary.
3659 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
3660 || (size
== 64 && gsym
->type() == elfcpp::STT_GNU_IFUNC
))
3662 if (gsym
->may_need_copy_reloc())
3664 target
->copy_reloc(symtab
, layout
, object
,
3665 data_shndx
, output_section
, gsym
, reloc
);
3667 else if ((size
== 32
3668 && r_type
== elfcpp::R_POWERPC_ADDR32
3669 && gsym
->can_use_relative_reloc(false)
3670 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
3671 && parameters
->options().shared()))
3673 && r_type
== elfcpp::R_PPC64_ADDR64
3674 && (gsym
->can_use_relative_reloc(false)
3675 || data_shndx
== ppc_object
->opd_shndx())))
3677 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3678 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3679 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3681 rela_dyn
= target
->iplt_section()->rel_plt();
3682 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3684 rela_dyn
->add_symbolless_global_addend(
3685 gsym
, dynrel
, output_section
, object
, data_shndx
,
3686 reloc
.get_r_offset(), reloc
.get_r_addend());
3690 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3691 check_non_pic(object
, r_type
);
3692 rela_dyn
->add_global(gsym
, r_type
, output_section
,
3694 reloc
.get_r_offset(),
3695 reloc
.get_r_addend());
3701 case elfcpp::R_PPC_PLTREL24
:
3702 case elfcpp::R_POWERPC_REL24
:
3703 if (gsym
->needs_plt_entry()
3704 || (!gsym
->final_value_is_known()
3705 && (gsym
->is_undefined()
3706 || gsym
->is_from_dynobj()
3707 || gsym
->is_preemptible())))
3708 target
->make_plt_entry(symtab
, layout
, gsym
, reloc
, object
);
3711 case elfcpp::R_PPC64_REL64
:
3712 case elfcpp::R_POWERPC_REL32
:
3713 // Make a dynamic relocation if necessary.
3714 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
3716 if (gsym
->may_need_copy_reloc())
3718 target
->copy_reloc(symtab
, layout
, object
,
3719 data_shndx
, output_section
, gsym
,
3724 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3725 check_non_pic(object
, r_type
);
3726 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
3727 data_shndx
, reloc
.get_r_offset(),
3728 reloc
.get_r_addend());
3733 case elfcpp::R_POWERPC_REL16
:
3734 case elfcpp::R_POWERPC_REL16_LO
:
3735 case elfcpp::R_POWERPC_REL16_HI
:
3736 case elfcpp::R_POWERPC_REL16_HA
:
3737 case elfcpp::R_POWERPC_REL14
:
3738 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3739 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3740 case elfcpp::R_POWERPC_SECTOFF
:
3741 case elfcpp::R_POWERPC_TPREL16
:
3742 case elfcpp::R_POWERPC_DTPREL16
:
3743 case elfcpp::R_POWERPC_SECTOFF_LO
:
3744 case elfcpp::R_POWERPC_TPREL16_LO
:
3745 case elfcpp::R_POWERPC_DTPREL16_LO
:
3746 case elfcpp::R_POWERPC_SECTOFF_HI
:
3747 case elfcpp::R_POWERPC_TPREL16_HI
:
3748 case elfcpp::R_POWERPC_DTPREL16_HI
:
3749 case elfcpp::R_POWERPC_SECTOFF_HA
:
3750 case elfcpp::R_POWERPC_TPREL16_HA
:
3751 case elfcpp::R_POWERPC_DTPREL16_HA
:
3752 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3753 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3754 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3755 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3756 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3757 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3758 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3759 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3760 case elfcpp::R_PPC64_TPREL16_DS
:
3761 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3762 case elfcpp::R_PPC64_DTPREL16_DS
:
3763 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3764 case elfcpp::R_PPC64_SECTOFF_DS
:
3765 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3766 case elfcpp::R_PPC64_TLSGD
:
3767 case elfcpp::R_PPC64_TLSLD
:
3770 case elfcpp::R_POWERPC_GOT16
:
3771 case elfcpp::R_POWERPC_GOT16_LO
:
3772 case elfcpp::R_POWERPC_GOT16_HI
:
3773 case elfcpp::R_POWERPC_GOT16_HA
:
3774 case elfcpp::R_PPC64_GOT16_DS
:
3775 case elfcpp::R_PPC64_GOT16_LO_DS
:
3777 // The symbol requires a GOT entry.
3778 Output_data_got_powerpc
<size
, big_endian
>* got
;
3780 got
= target
->got_section(symtab
, layout
);
3781 if (gsym
->final_value_is_known())
3783 if (size
== 32 && gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3784 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
3786 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
3788 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
3790 // If we are generating a shared object or a pie, this
3791 // symbol's GOT entry will be set by a dynamic relocation.
3792 unsigned int off
= got
->add_constant(0);
3793 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
3795 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3796 if (gsym
->can_use_relative_reloc(false)
3798 && gsym
->visibility() == elfcpp::STV_PROTECTED
3799 && parameters
->options().shared()))
3801 unsigned int dynrel
= elfcpp::R_POWERPC_RELATIVE
;
3802 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
3804 rela_dyn
= target
->iplt_section()->rel_plt();
3805 dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
3807 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
3811 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
3812 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
3818 case elfcpp::R_PPC64_TOC16
:
3819 case elfcpp::R_PPC64_TOC16_LO
:
3820 case elfcpp::R_PPC64_TOC16_HI
:
3821 case elfcpp::R_PPC64_TOC16_HA
:
3822 case elfcpp::R_PPC64_TOC16_DS
:
3823 case elfcpp::R_PPC64_TOC16_LO_DS
:
3824 // We need a GOT section.
3825 target
->got_section(symtab
, layout
);
3828 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3829 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3830 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3831 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3833 const bool final
= gsym
->final_value_is_known();
3834 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
3835 if (tls_type
== tls::TLSOPT_NONE
)
3837 Output_data_got_powerpc
<size
, big_endian
>* got
3838 = target
->got_section(symtab
, layout
);
3839 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
3840 target
->rela_dyn_section(layout
),
3841 elfcpp::R_POWERPC_DTPMOD
,
3842 elfcpp::R_POWERPC_DTPREL
);
3844 else if (tls_type
== tls::TLSOPT_TO_IE
)
3846 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3848 Output_data_got_powerpc
<size
, big_endian
>* got
3849 = target
->got_section(symtab
, layout
);
3850 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3851 if (gsym
->is_undefined()
3852 || gsym
->is_from_dynobj())
3854 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3855 elfcpp::R_POWERPC_TPREL
);
3859 unsigned int off
= got
->add_constant(0);
3860 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3861 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3862 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3867 else if (tls_type
== tls::TLSOPT_TO_LE
)
3869 // no GOT relocs needed for Local Exec.
3876 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3877 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3878 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3879 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3881 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3882 if (tls_type
== tls::TLSOPT_NONE
)
3883 target
->tlsld_got_offset(symtab
, layout
, object
);
3884 else if (tls_type
== tls::TLSOPT_TO_LE
)
3886 // no GOT relocs needed for Local Exec.
3887 if (parameters
->options().emit_relocs())
3889 Output_section
* os
= layout
->tls_segment()->first_section();
3890 gold_assert(os
!= NULL
);
3891 os
->set_needs_symtab_index();
3899 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3900 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3901 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3902 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3904 Output_data_got_powerpc
<size
, big_endian
>* got
3905 = target
->got_section(symtab
, layout
);
3906 if (!gsym
->final_value_is_known()
3907 && (gsym
->is_from_dynobj()
3908 || gsym
->is_undefined()
3909 || gsym
->is_preemptible()))
3910 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
3911 target
->rela_dyn_section(layout
),
3912 elfcpp::R_POWERPC_DTPREL
);
3914 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
3918 case elfcpp::R_POWERPC_GOT_TPREL16
:
3919 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3920 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3921 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3923 const bool final
= gsym
->final_value_is_known();
3924 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
3925 if (tls_type
== tls::TLSOPT_NONE
)
3927 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
3929 Output_data_got_powerpc
<size
, big_endian
>* got
3930 = target
->got_section(symtab
, layout
);
3931 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
3932 if (gsym
->is_undefined()
3933 || gsym
->is_from_dynobj())
3935 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
3936 elfcpp::R_POWERPC_TPREL
);
3940 unsigned int off
= got
->add_constant(0);
3941 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
3942 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
3943 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
3948 else if (tls_type
== tls::TLSOPT_TO_LE
)
3950 // no GOT relocs needed for Local Exec.
3958 unsupported_reloc_global(object
, r_type
, gsym
);
3963 // Process relocations for gc.
3965 template<int size
, bool big_endian
>
3967 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
3968 Symbol_table
* symtab
,
3970 Sized_relobj_file
<size
, big_endian
>* object
,
3971 unsigned int data_shndx
,
3973 const unsigned char* prelocs
,
3975 Output_section
* output_section
,
3976 bool needs_special_offset_handling
,
3977 size_t local_symbol_count
,
3978 const unsigned char* plocal_symbols
)
3980 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
3981 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
3982 Powerpc_relobj
<size
, big_endian
>* ppc_object
3983 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
3985 ppc_object
->set_opd_valid();
3986 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
3988 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
3989 for (p
= ppc_object
->access_from_map()->begin();
3990 p
!= ppc_object
->access_from_map()->end();
3993 Address dst_off
= p
->first
;
3994 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
3995 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
3996 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
3998 Object
* src_obj
= s
->first
;
3999 unsigned int src_indx
= s
->second
;
4000 symtab
->gc()->add_reference(src_obj
, src_indx
,
4001 ppc_object
, dst_indx
);
4005 ppc_object
->access_from_map()->clear();
4006 ppc_object
->process_gc_mark(symtab
);
4007 // Don't look at .opd relocs as .opd will reference everything.
4011 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
4012 typename
Target_powerpc::Relocatable_size_for_reloc
>(
4021 needs_special_offset_handling
,
4026 // Handle target specific gc actions when adding a gc reference from
4027 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
4028 // and DST_OFF. For powerpc64, this adds a referenc to the code
4029 // section of a function descriptor.
4031 template<int size
, bool big_endian
>
4033 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
4034 Symbol_table
* symtab
,
4036 unsigned int src_shndx
,
4038 unsigned int dst_shndx
,
4039 Address dst_off
) const
4041 Powerpc_relobj
<size
, big_endian
>* ppc_object
4042 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
4044 && !ppc_object
->is_dynamic()
4045 && dst_shndx
== ppc_object
->opd_shndx())
4047 if (ppc_object
->opd_valid())
4049 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
4050 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
4054 // If we haven't run scan_opd_relocs, we must delay
4055 // processing this function descriptor reference.
4056 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
4061 // Add any special sections for this symbol to the gc work list.
4062 // For powerpc64, this adds the code section of a function
4065 template<int size
, bool big_endian
>
4067 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
4068 Symbol_table
* symtab
,
4073 Powerpc_relobj
<size
, big_endian
>* ppc_object
4074 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
4076 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4077 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
4079 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
4080 Address dst_off
= gsym
->value();
4081 if (ppc_object
->opd_valid())
4083 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
4084 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
4087 ppc_object
->add_gc_mark(dst_off
);
4092 // Scan relocations for a section.
4094 template<int size
, bool big_endian
>
4096 Target_powerpc
<size
, big_endian
>::scan_relocs(
4097 Symbol_table
* symtab
,
4099 Sized_relobj_file
<size
, big_endian
>* object
,
4100 unsigned int data_shndx
,
4101 unsigned int sh_type
,
4102 const unsigned char* prelocs
,
4104 Output_section
* output_section
,
4105 bool needs_special_offset_handling
,
4106 size_t local_symbol_count
,
4107 const unsigned char* plocal_symbols
)
4109 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
4110 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
4112 if (sh_type
== elfcpp::SHT_REL
)
4114 gold_error(_("%s: unsupported REL reloc section"),
4115 object
->name().c_str());
4119 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
4128 needs_special_offset_handling
,
4133 // Functor class for processing the global symbol table.
4134 // Removes symbols defined on discarded opd entries.
4136 template<bool big_endian
>
4137 class Global_symbol_visitor_opd
4140 Global_symbol_visitor_opd()
4144 operator()(Sized_symbol
<64>* sym
)
4146 if (sym
->has_symtab_index()
4147 || sym
->source() != Symbol::FROM_OBJECT
4148 || !sym
->in_real_elf())
4151 Powerpc_relobj
<64, big_endian
>* symobj
4152 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
4153 if (symobj
->is_dynamic()
4154 || symobj
->opd_shndx() == 0)
4158 unsigned int shndx
= sym
->shndx(&is_ordinary
);
4159 if (shndx
== symobj
->opd_shndx()
4160 && symobj
->get_opd_discard(sym
->value()))
4161 sym
->set_symtab_index(-1U);
4165 template<int size
, bool big_endian
>
4167 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
4169 Symbol_table
* symtab
)
4173 Output_data_save_res
<64, big_endian
>* savres
4174 = new Output_data_save_res
<64, big_endian
>(symtab
);
4175 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4176 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4177 savres
, ORDER_TEXT
, false);
4181 // Finalize the sections.
4183 template<int size
, bool big_endian
>
4185 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
4187 const Input_objects
*,
4188 Symbol_table
* symtab
)
4190 if (parameters
->doing_static_link())
4192 // At least some versions of glibc elf-init.o have a strong
4193 // reference to __rela_iplt marker syms. A weak ref would be
4195 if (this->iplt_
!= NULL
)
4197 Reloc_section
* rel
= this->iplt_
->rel_plt();
4198 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
4199 Symbol_table::PREDEFINED
, rel
, 0, 0,
4200 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4201 elfcpp::STV_HIDDEN
, 0, false, true);
4202 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
4203 Symbol_table::PREDEFINED
, rel
, 0, 0,
4204 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4205 elfcpp::STV_HIDDEN
, 0, true, true);
4209 symtab
->define_as_constant("__rela_iplt_start", NULL
,
4210 Symbol_table::PREDEFINED
, 0, 0,
4211 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4212 elfcpp::STV_HIDDEN
, 0, true, false);
4213 symtab
->define_as_constant("__rela_iplt_end", NULL
,
4214 Symbol_table::PREDEFINED
, 0, 0,
4215 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
4216 elfcpp::STV_HIDDEN
, 0, true, false);
4222 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
4223 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
4224 this->define_save_restore_funcs(layout
, symtab
);
4227 // Fill in some more dynamic tags.
4228 Output_data_dynamic
* odyn
= layout
->dynamic_data();
4231 const Reloc_section
* rel_plt
= (this->plt_
== NULL
4233 : this->plt_
->rel_plt());
4234 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
4235 this->rela_dyn_
, true, size
== 32);
4239 if (this->got_
!= NULL
)
4241 this->got_
->finalize_data_size();
4242 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
4243 this->got_
, this->got_
->g_o_t());
4248 if (this->glink_
!= NULL
)
4250 this->glink_
->finalize_data_size();
4251 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
4253 (this->glink_
->pltresolve()
4254 + this->glink_
->pltresolve_size
4260 // Emit any relocs we saved in an attempt to avoid generating COPY
4262 if (this->copy_relocs_
.any_saved_relocs())
4263 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
4266 // Return the value to use for a branch relocation.
4268 template<int size
, bool big_endian
>
4269 typename
elfcpp::Elf_types
<size
>::Elf_Addr
4270 Target_powerpc
<size
, big_endian
>::symval_for_branch(
4272 const Sized_symbol
<size
>* gsym
,
4273 Powerpc_relobj
<size
, big_endian
>* object
,
4274 unsigned int *dest_shndx
)
4280 // If the symbol is defined in an opd section, ie. is a function
4281 // descriptor, use the function descriptor code entry address
4282 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
4284 && gsym
->source() != Symbol::FROM_OBJECT
)
4287 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
4288 unsigned int shndx
= symobj
->opd_shndx();
4291 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
4292 gold_assert(opd_addr
!= invalid_address
);
4293 opd_addr
+= symobj
->output_section(shndx
)->address();
4294 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
4297 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
4298 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
4299 gold_assert(sec_addr
!= invalid_address
);
4300 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
4301 value
= sec_addr
+ sec_off
;
4306 // Perform a relocation.
4308 template<int size
, bool big_endian
>
4310 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
4311 const Relocate_info
<size
, big_endian
>* relinfo
,
4312 Target_powerpc
* target
,
4315 const elfcpp::Rela
<size
, big_endian
>& rela
,
4316 unsigned int r_type
,
4317 const Sized_symbol
<size
>* gsym
,
4318 const Symbol_value
<size
>* psymval
,
4319 unsigned char* view
,
4321 section_size_type view_size
)
4324 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
4325 || r_type
== elfcpp::R_PPC_PLTREL24
)
4327 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
4328 enum skip_tls last_tls
= this->call_tls_get_addr_
;
4329 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
4332 if (last_tls
== CALL_NOT_EXPECTED
)
4333 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4334 _("__tls_get_addr call lacks marker reloc"));
4335 else if (last_tls
== CALL_SKIP
)
4338 else if (last_tls
!= CALL_NOT_EXPECTED
)
4339 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4340 _("missing expected __tls_get_addr call"));
4342 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
4343 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
4344 Powerpc_relobj
<size
, big_endian
>* const object
4345 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
4347 bool has_plt_value
= false;
4348 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4350 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
4351 : object
->local_has_plt_offset(r_sym
))
4353 const Output_data_glink
<size
, big_endian
>* glink
4354 = target
->glink_section();
4355 unsigned int glink_index
;
4357 glink_index
= glink
->find_entry(object
, gsym
, rela
);
4359 glink_index
= glink
->find_entry(object
, r_sym
, rela
);
4360 value
= glink
->address() + glink_index
* glink
->glink_entry_size();
4361 has_plt_value
= true;
4364 if (r_type
== elfcpp::R_POWERPC_GOT16
4365 || r_type
== elfcpp::R_POWERPC_GOT16_LO
4366 || r_type
== elfcpp::R_POWERPC_GOT16_HI
4367 || r_type
== elfcpp::R_POWERPC_GOT16_HA
4368 || r_type
== elfcpp::R_PPC64_GOT16_DS
4369 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
4373 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
4374 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
4378 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4379 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
4380 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
4382 value
-= target
->got_section()->got_base_offset(object
);
4384 else if (r_type
== elfcpp::R_PPC64_TOC
)
4386 value
= (target
->got_section()->output_section()->address()
4387 + object
->toc_base_offset());
4389 else if (gsym
!= NULL
4390 && (r_type
== elfcpp::R_POWERPC_REL24
4391 || r_type
== elfcpp::R_PPC_PLTREL24
)
4396 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
4397 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
4398 bool can_plt_call
= false;
4399 if (rela
.get_r_offset() + 8 <= view_size
)
4401 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
4402 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
4405 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
4407 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
4408 can_plt_call
= true;
4413 // If we don't have a branch and link followed by a nop,
4414 // we can't go via the plt because there is no place to
4415 // put a toc restoring instruction.
4416 // Unless we know we won't be returning.
4417 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
4418 can_plt_call
= true;
4422 // This is not an error in one special case: A self
4423 // call. It isn't possible to cheaply verify we have
4424 // such a call so just check for a call to the same
4427 Address code
= value
;
4428 if (gsym
->source() == Symbol::FROM_OBJECT
4429 && gsym
->object() == object
)
4431 Address addend
= rela
.get_r_addend();
4432 unsigned int dest_shndx
;
4433 Address opdent
= psymval
->value(object
, addend
);
4434 code
= target
->symval_for_branch(opdent
, gsym
, object
,
4437 if (dest_shndx
== 0)
4438 dest_shndx
= gsym
->shndx(&is_ordinary
);
4439 ok
= dest_shndx
== relinfo
->data_shndx
;
4443 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
4444 _("call lacks nop, can't restore toc; "
4445 "recompile with -fPIC"));
4451 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4452 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
4453 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
4454 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
4456 // First instruction of a global dynamic sequence, arg setup insn.
4457 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4458 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4459 enum Got_type got_type
= GOT_TYPE_STANDARD
;
4460 if (tls_type
== tls::TLSOPT_NONE
)
4461 got_type
= GOT_TYPE_TLSGD
;
4462 else if (tls_type
== tls::TLSOPT_TO_IE
)
4463 got_type
= GOT_TYPE_TPREL
;
4464 if (got_type
!= GOT_TYPE_STANDARD
)
4468 gold_assert(gsym
->has_got_offset(got_type
));
4469 value
= gsym
->got_offset(got_type
);
4473 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4474 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
4475 value
= object
->local_got_offset(r_sym
, got_type
);
4477 value
-= target
->got_section()->got_base_offset(object
);
4479 if (tls_type
== tls::TLSOPT_TO_IE
)
4481 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4482 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4484 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4485 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4486 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
4488 insn
|= 32 << 26; // lwz
4490 insn
|= 58 << 26; // ld
4491 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4493 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
4494 - elfcpp::R_POWERPC_GOT_TLSGD16
);
4496 else if (tls_type
== tls::TLSOPT_TO_LE
)
4498 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4499 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4501 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4502 Insn insn
= addis_3_13
;
4505 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4506 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4507 value
= psymval
->value(object
, rela
.get_r_addend());
4511 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4513 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4514 r_type
= elfcpp::R_POWERPC_NONE
;
4518 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4519 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
4520 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
4521 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
4523 // First instruction of a local dynamic sequence, arg setup insn.
4524 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4525 if (tls_type
== tls::TLSOPT_NONE
)
4527 value
= target
->tlsld_got_offset();
4528 value
-= target
->got_section()->got_base_offset(object
);
4532 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4533 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4534 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
4536 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4537 Insn insn
= addis_3_13
;
4540 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4541 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4546 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4548 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4549 r_type
= elfcpp::R_POWERPC_NONE
;
4553 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
4554 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
4555 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
4556 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
4558 // Accesses relative to a local dynamic sequence address,
4559 // no optimisation here.
4562 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
4563 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
4567 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4568 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
4569 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
4571 value
-= target
->got_section()->got_base_offset(object
);
4573 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4574 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
4575 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
4576 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
4578 // First instruction of initial exec sequence.
4579 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4580 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4581 if (tls_type
== tls::TLSOPT_NONE
)
4585 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
4586 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
4590 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4591 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
4592 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
4594 value
-= target
->got_section()->got_base_offset(object
);
4598 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
4599 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4600 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
4602 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4603 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4604 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
4609 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4610 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4611 value
= psymval
->value(object
, rela
.get_r_addend());
4615 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
4617 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4618 r_type
= elfcpp::R_POWERPC_NONE
;
4622 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4623 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4625 // Second instruction of a global dynamic sequence,
4626 // the __tls_get_addr call
4627 this->call_tls_get_addr_
= CALL_EXPECTED
;
4628 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4629 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
4630 if (tls_type
!= tls::TLSOPT_NONE
)
4632 if (tls_type
== tls::TLSOPT_TO_IE
)
4634 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4635 Insn insn
= add_3_3_13
;
4638 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4639 r_type
= elfcpp::R_POWERPC_NONE
;
4643 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4644 Insn insn
= addi_3_3
;
4645 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4646 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4647 view
+= 2 * big_endian
;
4648 value
= psymval
->value(object
, rela
.get_r_addend());
4650 this->call_tls_get_addr_
= CALL_SKIP
;
4653 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4654 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4656 // Second instruction of a local dynamic sequence,
4657 // the __tls_get_addr call
4658 this->call_tls_get_addr_
= CALL_EXPECTED
;
4659 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4660 if (tls_type
== tls::TLSOPT_TO_LE
)
4662 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4663 Insn insn
= addi_3_3
;
4664 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4665 this->call_tls_get_addr_
= CALL_SKIP
;
4666 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4667 view
+= 2 * big_endian
;
4671 else if (r_type
== elfcpp::R_POWERPC_TLS
)
4673 // Second instruction of an initial exec sequence
4674 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4675 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
4676 if (tls_type
== tls::TLSOPT_TO_LE
)
4678 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4679 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4680 unsigned int reg
= size
== 32 ? 2 : 13;
4681 insn
= at_tls_transform(insn
, reg
);
4682 gold_assert(insn
!= 0);
4683 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4684 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4685 view
+= 2 * big_endian
;
4686 value
= psymval
->value(object
, rela
.get_r_addend());
4689 else if (!has_plt_value
)
4692 unsigned int dest_shndx
;
4693 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
4694 addend
= rela
.get_r_addend();
4695 value
= psymval
->value(object
, addend
);
4696 if (size
== 64 && is_branch_reloc(r_type
))
4697 value
= target
->symval_for_branch(value
, gsym
, object
, &dest_shndx
);
4702 case elfcpp::R_PPC64_REL64
:
4703 case elfcpp::R_POWERPC_REL32
:
4704 case elfcpp::R_POWERPC_REL24
:
4705 case elfcpp::R_PPC_PLTREL24
:
4706 case elfcpp::R_PPC_LOCAL24PC
:
4707 case elfcpp::R_POWERPC_REL16
:
4708 case elfcpp::R_POWERPC_REL16_LO
:
4709 case elfcpp::R_POWERPC_REL16_HI
:
4710 case elfcpp::R_POWERPC_REL16_HA
:
4711 case elfcpp::R_POWERPC_REL14
:
4712 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4713 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4717 case elfcpp::R_PPC64_TOC16
:
4718 case elfcpp::R_PPC64_TOC16_LO
:
4719 case elfcpp::R_PPC64_TOC16_HI
:
4720 case elfcpp::R_PPC64_TOC16_HA
:
4721 case elfcpp::R_PPC64_TOC16_DS
:
4722 case elfcpp::R_PPC64_TOC16_LO_DS
:
4723 // Subtract the TOC base address.
4724 value
-= (target
->got_section()->output_section()->address()
4725 + object
->toc_base_offset());
4728 case elfcpp::R_POWERPC_SECTOFF
:
4729 case elfcpp::R_POWERPC_SECTOFF_LO
:
4730 case elfcpp::R_POWERPC_SECTOFF_HI
:
4731 case elfcpp::R_POWERPC_SECTOFF_HA
:
4732 case elfcpp::R_PPC64_SECTOFF_DS
:
4733 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
4735 value
-= os
->address();
4738 case elfcpp::R_PPC64_TPREL16_DS
:
4739 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4741 // R_PPC_TLSGD and R_PPC_TLSLD
4743 case elfcpp::R_POWERPC_TPREL16
:
4744 case elfcpp::R_POWERPC_TPREL16_LO
:
4745 case elfcpp::R_POWERPC_TPREL16_HI
:
4746 case elfcpp::R_POWERPC_TPREL16_HA
:
4747 case elfcpp::R_POWERPC_TPREL
:
4748 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4749 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4750 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4751 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4752 // tls symbol values are relative to tls_segment()->vaddr()
4756 case elfcpp::R_PPC64_DTPREL16_DS
:
4757 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
4758 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4759 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4760 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4761 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
4763 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
4764 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
4766 case elfcpp::R_POWERPC_DTPREL16
:
4767 case elfcpp::R_POWERPC_DTPREL16_LO
:
4768 case elfcpp::R_POWERPC_DTPREL16_HI
:
4769 case elfcpp::R_POWERPC_DTPREL16_HA
:
4770 case elfcpp::R_POWERPC_DTPREL
:
4771 // tls symbol values are relative to tls_segment()->vaddr()
4772 value
-= dtp_offset
;
4779 Insn branch_bit
= 0;
4782 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4783 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4784 branch_bit
= 1 << 21;
4785 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4786 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4788 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
4789 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
4792 if (this->is_isa_v2
)
4794 // Set 'a' bit. This is 0b00010 in BO field for branch
4795 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
4796 // for branch on CTR insns (BO == 1a00t or 1a01t).
4797 if ((insn
& (0x14 << 21)) == (0x04 << 21))
4799 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
4806 // Invert 'y' bit if not the default.
4807 if (static_cast<Signed_address
>(value
) < 0)
4810 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
4818 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
4821 case elfcpp::R_POWERPC_ADDR32
:
4822 case elfcpp::R_POWERPC_UADDR32
:
4824 overflow
= Reloc::CHECK_BITFIELD
;
4827 case elfcpp::R_POWERPC_REL32
:
4829 overflow
= Reloc::CHECK_SIGNED
;
4832 case elfcpp::R_POWERPC_ADDR24
:
4833 case elfcpp::R_POWERPC_ADDR16
:
4834 case elfcpp::R_POWERPC_UADDR16
:
4835 case elfcpp::R_PPC64_ADDR16_DS
:
4836 case elfcpp::R_POWERPC_ADDR14
:
4837 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4838 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4839 overflow
= Reloc::CHECK_BITFIELD
;
4842 case elfcpp::R_POWERPC_REL24
:
4843 case elfcpp::R_PPC_PLTREL24
:
4844 case elfcpp::R_PPC_LOCAL24PC
:
4845 case elfcpp::R_POWERPC_REL16
:
4846 case elfcpp::R_PPC64_TOC16
:
4847 case elfcpp::R_POWERPC_GOT16
:
4848 case elfcpp::R_POWERPC_SECTOFF
:
4849 case elfcpp::R_POWERPC_TPREL16
:
4850 case elfcpp::R_POWERPC_DTPREL16
:
4851 case elfcpp::R_PPC64_TPREL16_DS
:
4852 case elfcpp::R_PPC64_DTPREL16_DS
:
4853 case elfcpp::R_PPC64_TOC16_DS
:
4854 case elfcpp::R_PPC64_GOT16_DS
:
4855 case elfcpp::R_PPC64_SECTOFF_DS
:
4856 case elfcpp::R_POWERPC_REL14
:
4857 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4858 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4859 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4860 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4861 case elfcpp::R_POWERPC_GOT_TPREL16
:
4862 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4863 overflow
= Reloc::CHECK_SIGNED
;
4867 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
4868 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
4871 case elfcpp::R_POWERPC_NONE
:
4872 case elfcpp::R_POWERPC_TLS
:
4873 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4874 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4875 case elfcpp::R_PPC_EMB_MRKREF
:
4878 case elfcpp::R_PPC64_ADDR64
:
4879 case elfcpp::R_PPC64_REL64
:
4880 case elfcpp::R_PPC64_TOC
:
4881 Reloc::addr64(view
, value
);
4884 case elfcpp::R_POWERPC_TPREL
:
4885 case elfcpp::R_POWERPC_DTPREL
:
4887 Reloc::addr64(view
, value
);
4889 status
= Reloc::addr32(view
, value
, overflow
);
4892 case elfcpp::R_PPC64_UADDR64
:
4893 Reloc::addr64_u(view
, value
);
4896 case elfcpp::R_POWERPC_ADDR32
:
4897 status
= Reloc::addr32(view
, value
, overflow
);
4900 case elfcpp::R_POWERPC_REL32
:
4901 case elfcpp::R_POWERPC_UADDR32
:
4902 status
= Reloc::addr32_u(view
, value
, overflow
);
4905 case elfcpp::R_POWERPC_ADDR24
:
4906 case elfcpp::R_POWERPC_REL24
:
4907 case elfcpp::R_PPC_PLTREL24
:
4908 case elfcpp::R_PPC_LOCAL24PC
:
4909 status
= Reloc::addr24(view
, value
, overflow
);
4912 case elfcpp::R_POWERPC_GOT_DTPREL16
:
4913 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
4916 status
= Reloc::addr16_ds(view
, value
, overflow
);
4919 case elfcpp::R_POWERPC_ADDR16
:
4920 case elfcpp::R_POWERPC_REL16
:
4921 case elfcpp::R_PPC64_TOC16
:
4922 case elfcpp::R_POWERPC_GOT16
:
4923 case elfcpp::R_POWERPC_SECTOFF
:
4924 case elfcpp::R_POWERPC_TPREL16
:
4925 case elfcpp::R_POWERPC_DTPREL16
:
4926 case elfcpp::R_POWERPC_GOT_TLSGD16
:
4927 case elfcpp::R_POWERPC_GOT_TLSLD16
:
4928 case elfcpp::R_POWERPC_GOT_TPREL16
:
4929 case elfcpp::R_POWERPC_ADDR16_LO
:
4930 case elfcpp::R_POWERPC_REL16_LO
:
4931 case elfcpp::R_PPC64_TOC16_LO
:
4932 case elfcpp::R_POWERPC_GOT16_LO
:
4933 case elfcpp::R_POWERPC_SECTOFF_LO
:
4934 case elfcpp::R_POWERPC_TPREL16_LO
:
4935 case elfcpp::R_POWERPC_DTPREL16_LO
:
4936 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
4937 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
4938 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
4939 status
= Reloc::addr16(view
, value
, overflow
);
4942 case elfcpp::R_POWERPC_UADDR16
:
4943 status
= Reloc::addr16_u(view
, value
, overflow
);
4946 case elfcpp::R_POWERPC_ADDR16_HI
:
4947 case elfcpp::R_POWERPC_REL16_HI
:
4948 case elfcpp::R_PPC64_TOC16_HI
:
4949 case elfcpp::R_POWERPC_GOT16_HI
:
4950 case elfcpp::R_POWERPC_SECTOFF_HI
:
4951 case elfcpp::R_POWERPC_TPREL16_HI
:
4952 case elfcpp::R_POWERPC_DTPREL16_HI
:
4953 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
4954 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
4955 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
4956 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
4957 Reloc::addr16_hi(view
, value
);
4960 case elfcpp::R_POWERPC_ADDR16_HA
:
4961 case elfcpp::R_POWERPC_REL16_HA
:
4962 case elfcpp::R_PPC64_TOC16_HA
:
4963 case elfcpp::R_POWERPC_GOT16_HA
:
4964 case elfcpp::R_POWERPC_SECTOFF_HA
:
4965 case elfcpp::R_POWERPC_TPREL16_HA
:
4966 case elfcpp::R_POWERPC_DTPREL16_HA
:
4967 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
4968 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
4969 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
4970 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
4971 Reloc::addr16_ha(view
, value
);
4974 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
4976 // R_PPC_EMB_NADDR16_LO
4978 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4979 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4980 Reloc::addr16_hi2(view
, value
);
4983 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
4985 // R_PPC_EMB_NADDR16_HI
4987 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4988 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4989 Reloc::addr16_ha2(view
, value
);
4992 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
4994 // R_PPC_EMB_NADDR16_HA
4996 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4997 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4998 Reloc::addr16_hi3(view
, value
);
5001 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5005 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5006 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5007 Reloc::addr16_ha3(view
, value
);
5010 case elfcpp::R_PPC64_DTPREL16_DS
:
5011 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5013 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
5015 case elfcpp::R_PPC64_TPREL16_DS
:
5016 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5018 // R_PPC_TLSGD, R_PPC_TLSLD
5020 case elfcpp::R_PPC64_ADDR16_DS
:
5021 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5022 case elfcpp::R_PPC64_TOC16_DS
:
5023 case elfcpp::R_PPC64_TOC16_LO_DS
:
5024 case elfcpp::R_PPC64_GOT16_DS
:
5025 case elfcpp::R_PPC64_GOT16_LO_DS
:
5026 case elfcpp::R_PPC64_SECTOFF_DS
:
5027 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5028 status
= Reloc::addr16_ds(view
, value
, overflow
);
5031 case elfcpp::R_POWERPC_ADDR14
:
5032 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5033 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5034 case elfcpp::R_POWERPC_REL14
:
5035 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5036 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5037 status
= Reloc::addr14(view
, value
, overflow
);
5040 case elfcpp::R_POWERPC_COPY
:
5041 case elfcpp::R_POWERPC_GLOB_DAT
:
5042 case elfcpp::R_POWERPC_JMP_SLOT
:
5043 case elfcpp::R_POWERPC_RELATIVE
:
5044 case elfcpp::R_POWERPC_DTPMOD
:
5045 case elfcpp::R_PPC64_JMP_IREL
:
5046 case elfcpp::R_POWERPC_IRELATIVE
:
5047 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5048 _("unexpected reloc %u in object file"),
5052 case elfcpp::R_PPC_EMB_SDA21
:
5057 // R_PPC64_TOCSAVE. For the time being this can be ignored.
5061 case elfcpp::R_PPC_EMB_SDA2I16
:
5062 case elfcpp::R_PPC_EMB_SDA2REL
:
5065 // R_PPC64_TLSGD, R_PPC64_TLSLD
5068 case elfcpp::R_POWERPC_PLT32
:
5069 case elfcpp::R_POWERPC_PLTREL32
:
5070 case elfcpp::R_POWERPC_PLT16_LO
:
5071 case elfcpp::R_POWERPC_PLT16_HI
:
5072 case elfcpp::R_POWERPC_PLT16_HA
:
5073 case elfcpp::R_PPC_SDAREL16
:
5074 case elfcpp::R_POWERPC_ADDR30
:
5075 case elfcpp::R_PPC64_PLT64
:
5076 case elfcpp::R_PPC64_PLTREL64
:
5077 case elfcpp::R_PPC64_PLTGOT16
:
5078 case elfcpp::R_PPC64_PLTGOT16_LO
:
5079 case elfcpp::R_PPC64_PLTGOT16_HI
:
5080 case elfcpp::R_PPC64_PLTGOT16_HA
:
5081 case elfcpp::R_PPC64_PLT16_LO_DS
:
5082 case elfcpp::R_PPC64_PLTGOT16_DS
:
5083 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
5084 case elfcpp::R_PPC_EMB_RELSEC16
:
5085 case elfcpp::R_PPC_EMB_RELST_LO
:
5086 case elfcpp::R_PPC_EMB_RELST_HI
:
5087 case elfcpp::R_PPC_EMB_RELST_HA
:
5088 case elfcpp::R_PPC_EMB_BIT_FLD
:
5089 case elfcpp::R_PPC_EMB_RELSDA
:
5090 case elfcpp::R_PPC_TOC16
:
5093 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5094 _("unsupported reloc %u"),
5098 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
5099 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5100 _("relocation overflow"));
5105 // Relocate section data.
5107 template<int size
, bool big_endian
>
5109 Target_powerpc
<size
, big_endian
>::relocate_section(
5110 const Relocate_info
<size
, big_endian
>* relinfo
,
5111 unsigned int sh_type
,
5112 const unsigned char* prelocs
,
5114 Output_section
* output_section
,
5115 bool needs_special_offset_handling
,
5116 unsigned char* view
,
5118 section_size_type view_size
,
5119 const Reloc_symbol_changes
* reloc_symbol_changes
)
5121 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5122 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
5123 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
5124 Powerpc_comdat_behavior
;
5126 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5128 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
5129 Powerpc_relocate
, Powerpc_comdat_behavior
>(
5135 needs_special_offset_handling
,
5139 reloc_symbol_changes
);
5142 class Powerpc_scan_relocatable_reloc
5145 // Return the strategy to use for a local symbol which is not a
5146 // section symbol, given the relocation type.
5147 inline Relocatable_relocs::Reloc_strategy
5148 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
5150 if (r_type
== 0 && r_sym
== 0)
5151 return Relocatable_relocs::RELOC_DISCARD
;
5152 return Relocatable_relocs::RELOC_COPY
;
5155 // Return the strategy to use for a local symbol which is a section
5156 // symbol, given the relocation type.
5157 inline Relocatable_relocs::Reloc_strategy
5158 local_section_strategy(unsigned int, Relobj
*)
5160 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
5163 // Return the strategy to use for a global symbol, given the
5164 // relocation type, the object, and the symbol index.
5165 inline Relocatable_relocs::Reloc_strategy
5166 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
5168 if (r_type
== elfcpp::R_PPC_PLTREL24
)
5169 return Relocatable_relocs::RELOC_SPECIAL
;
5170 return Relocatable_relocs::RELOC_COPY
;
5174 // Scan the relocs during a relocatable link.
5176 template<int size
, bool big_endian
>
5178 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
5179 Symbol_table
* symtab
,
5181 Sized_relobj_file
<size
, big_endian
>* object
,
5182 unsigned int data_shndx
,
5183 unsigned int sh_type
,
5184 const unsigned char* prelocs
,
5186 Output_section
* output_section
,
5187 bool needs_special_offset_handling
,
5188 size_t local_symbol_count
,
5189 const unsigned char* plocal_symbols
,
5190 Relocatable_relocs
* rr
)
5192 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5194 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
5195 Powerpc_scan_relocatable_reloc
>(
5203 needs_special_offset_handling
,
5209 // Emit relocations for a section.
5210 // This is a modified version of the function by the same name in
5211 // target-reloc.h. Using relocate_special_relocatable for
5212 // R_PPC_PLTREL24 would require duplication of the entire body of the
5213 // loop, so we may as well duplicate the whole thing.
5215 template<int size
, bool big_endian
>
5217 Target_powerpc
<size
, big_endian
>::relocate_relocs(
5218 const Relocate_info
<size
, big_endian
>* relinfo
,
5219 unsigned int sh_type
,
5220 const unsigned char* prelocs
,
5222 Output_section
* output_section
,
5223 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
5224 const Relocatable_relocs
* rr
,
5226 Address view_address
,
5228 unsigned char* reloc_view
,
5229 section_size_type reloc_view_size
)
5231 gold_assert(sh_type
== elfcpp::SHT_RELA
);
5233 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
5235 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
5237 const int reloc_size
5238 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
5240 Powerpc_relobj
<size
, big_endian
>* const object
5241 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
5242 const unsigned int local_count
= object
->local_symbol_count();
5243 unsigned int got2_shndx
= object
->got2_shndx();
5244 Address got2_addend
= 0;
5245 if (got2_shndx
!= 0)
5247 got2_addend
= object
->get_output_section_offset(got2_shndx
);
5248 gold_assert(got2_addend
!= invalid_address
);
5251 unsigned char* pwrite
= reloc_view
;
5252 bool zap_next
= false;
5253 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
5255 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
5256 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
5259 Reltype
reloc(prelocs
);
5260 Reltype_write
reloc_write(pwrite
);
5262 Address offset
= reloc
.get_r_offset();
5263 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
5264 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
5265 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
5266 const unsigned int orig_r_sym
= r_sym
;
5267 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
5268 = reloc
.get_r_addend();
5269 const Symbol
* gsym
= NULL
;
5273 // We could arrange to discard these and other relocs for
5274 // tls optimised sequences in the strategy methods, but for
5275 // now do as BFD ld does.
5276 r_type
= elfcpp::R_POWERPC_NONE
;
5280 // Get the new symbol index.
5281 if (r_sym
< local_count
)
5285 case Relocatable_relocs::RELOC_COPY
:
5286 case Relocatable_relocs::RELOC_SPECIAL
:
5289 r_sym
= object
->symtab_index(r_sym
);
5290 gold_assert(r_sym
!= -1U);
5294 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
5296 // We are adjusting a section symbol. We need to find
5297 // the symbol table index of the section symbol for
5298 // the output section corresponding to input section
5299 // in which this symbol is defined.
5300 gold_assert(r_sym
< local_count
);
5302 unsigned int shndx
=
5303 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
5304 gold_assert(is_ordinary
);
5305 Output_section
* os
= object
->output_section(shndx
);
5306 gold_assert(os
!= NULL
);
5307 gold_assert(os
->needs_symtab_index());
5308 r_sym
= os
->symtab_index();
5318 gsym
= object
->global_symbol(r_sym
);
5319 gold_assert(gsym
!= NULL
);
5320 if (gsym
->is_forwarder())
5321 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
5323 gold_assert(gsym
->has_symtab_index());
5324 r_sym
= gsym
->symtab_index();
5327 // Get the new offset--the location in the output section where
5328 // this relocation should be applied.
5329 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5330 offset
+= offset_in_output_section
;
5333 section_offset_type sot_offset
=
5334 convert_types
<section_offset_type
, Address
>(offset
);
5335 section_offset_type new_sot_offset
=
5336 output_section
->output_offset(object
, relinfo
->data_shndx
,
5338 gold_assert(new_sot_offset
!= -1);
5339 offset
= new_sot_offset
;
5342 // In an object file, r_offset is an offset within the section.
5343 // In an executable or dynamic object, generated by
5344 // --emit-relocs, r_offset is an absolute address.
5345 if (!parameters
->options().relocatable())
5347 offset
+= view_address
;
5348 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
5349 offset
-= offset_in_output_section
;
5352 // Handle the reloc addend based on the strategy.
5353 if (strategy
== Relocatable_relocs::RELOC_COPY
)
5355 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
5357 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
5358 addend
= psymval
->value(object
, addend
);
5360 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
5362 if (addend
>= 32768)
5363 addend
+= got2_addend
;
5368 if (!parameters
->options().relocatable())
5370 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5371 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
5372 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
5373 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
5375 // First instruction of a global dynamic sequence,
5377 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5378 switch (this->optimize_tls_gd(final
))
5380 case tls::TLSOPT_TO_IE
:
5381 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
5382 - elfcpp::R_POWERPC_GOT_TLSGD16
);
5384 case tls::TLSOPT_TO_LE
:
5385 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
5386 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
5387 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5390 r_type
= elfcpp::R_POWERPC_NONE
;
5391 offset
-= 2 * big_endian
;
5398 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5399 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
5400 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
5401 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
5403 // First instruction of a local dynamic sequence,
5405 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5407 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
5408 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
5410 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5411 const Output_section
* os
= relinfo
->layout
->tls_segment()
5413 gold_assert(os
!= NULL
);
5414 gold_assert(os
->needs_symtab_index());
5415 r_sym
= os
->symtab_index();
5416 addend
= dtp_offset
;
5420 r_type
= elfcpp::R_POWERPC_NONE
;
5421 offset
-= 2 * big_endian
;
5425 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5426 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
5427 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
5428 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
5430 // First instruction of initial exec sequence.
5431 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5432 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5434 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
5435 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
5436 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
5439 r_type
= elfcpp::R_POWERPC_NONE
;
5440 offset
-= 2 * big_endian
;
5444 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5445 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5447 // Second instruction of a global dynamic sequence,
5448 // the __tls_get_addr call
5449 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5450 switch (this->optimize_tls_gd(final
))
5452 case tls::TLSOPT_TO_IE
:
5453 r_type
= elfcpp::R_POWERPC_NONE
;
5456 case tls::TLSOPT_TO_LE
:
5457 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5458 offset
+= 2 * big_endian
;
5465 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5466 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5468 // Second instruction of a local dynamic sequence,
5469 // the __tls_get_addr call
5470 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
5472 const Output_section
* os
= relinfo
->layout
->tls_segment()
5474 gold_assert(os
!= NULL
);
5475 gold_assert(os
->needs_symtab_index());
5476 r_sym
= os
->symtab_index();
5477 addend
= dtp_offset
;
5478 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5479 offset
+= 2 * big_endian
;
5483 else if (r_type
== elfcpp::R_POWERPC_TLS
)
5485 // Second instruction of an initial exec sequence
5486 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
5487 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
5489 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
5490 offset
+= 2 * big_endian
;
5495 reloc_write
.put_r_offset(offset
);
5496 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
5497 reloc_write
.put_r_addend(addend
);
5499 pwrite
+= reloc_size
;
5502 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
5503 == reloc_view_size
);
5506 // Return the value to use for a dynamic which requires special
5507 // treatment. This is how we support equality comparisons of function
5508 // pointers across shared library boundaries, as described in the
5509 // processor specific ABI supplement.
5511 template<int size
, bool big_endian
>
5513 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
5517 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
5518 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5519 unsigned int glink_index
= glink
->find_entry(gsym
);
5520 return glink
->address() + glink_index
* glink
->glink_entry_size();
5526 // Return the PLT address to use for a local symbol.
5527 template<int size
, bool big_endian
>
5529 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
5530 const Relobj
* object
,
5531 unsigned int symndx
) const
5535 const Sized_relobj
<size
, big_endian
>* relobj
5536 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
5537 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5538 unsigned int glink_index
= glink
->find_entry(relobj
->sized_relobj(),
5540 return glink
->address() + glink_index
* glink
->glink_entry_size();
5546 // Return the PLT address to use for a global symbol.
5547 template<int size
, bool big_endian
>
5549 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
5550 const Symbol
* gsym
) const
5554 const Output_data_glink
<size
, big_endian
>* glink
= this->glink_section();
5555 unsigned int glink_index
= glink
->find_entry(gsym
);
5556 return glink
->address() + glink_index
* glink
->glink_entry_size();
5562 // Return the offset to use for the GOT_INDX'th got entry which is
5563 // for a local tls symbol specified by OBJECT, SYMNDX.
5564 template<int size
, bool big_endian
>
5566 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
5567 const Relobj
* object
,
5568 unsigned int symndx
,
5569 unsigned int got_indx
) const
5571 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5572 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
5573 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
5575 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5576 got_type
<= GOT_TYPE_TPREL
;
5577 got_type
= Got_type(got_type
+ 1))
5578 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
5580 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
5581 if (got_type
== GOT_TYPE_TLSGD
)
5583 if (off
== got_indx
* (size
/ 8))
5585 if (got_type
== GOT_TYPE_TPREL
)
5595 // Return the offset to use for the GOT_INDX'th got entry which is
5596 // for global tls symbol GSYM.
5597 template<int size
, bool big_endian
>
5599 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
5601 unsigned int got_indx
) const
5603 if (gsym
->type() == elfcpp::STT_TLS
)
5605 for (Got_type got_type
= GOT_TYPE_TLSGD
;
5606 got_type
<= GOT_TYPE_TPREL
;
5607 got_type
= Got_type(got_type
+ 1))
5608 if (gsym
->has_got_offset(got_type
))
5610 unsigned int off
= gsym
->got_offset(got_type
);
5611 if (got_type
== GOT_TYPE_TLSGD
)
5613 if (off
== got_indx
* (size
/ 8))
5615 if (got_type
== GOT_TYPE_TPREL
)
5625 // The selector for powerpc object files.
5627 template<int size
, bool big_endian
>
5628 class Target_selector_powerpc
: public Target_selector
5631 Target_selector_powerpc()
5632 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
5634 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
5635 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
5637 ? (big_endian
? "elf64ppc" : "elf64lppc")
5638 : (big_endian
? "elf32ppc" : "elf32lppc")))
5642 do_recognize(Input_file
*, off_t
, int machine
, int, int)
5647 if (machine
!= elfcpp::EM_PPC64
)
5652 if (machine
!= elfcpp::EM_PPC
)
5660 return this->instantiate_target();
5664 do_instantiate_target()
5665 { return new Target_powerpc
<size
, big_endian
>(); }
5668 Target_selector_powerpc
<32, true> target_selector_ppc32
;
5669 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
5670 Target_selector_powerpc
<64, true> target_selector_ppc64
;
5671 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
5673 } // End anonymous namespace.