1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012, 2013 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.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
66 is_branch_reloc(unsigned int r_type
);
68 template<int size
, bool big_endian
>
69 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
72 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
73 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
74 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
76 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
77 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
78 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
79 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
80 opd_ent_(), access_from_map_(), has14_(), stub_table_()
86 // The .got2 section shndx.
91 return this->special_
;
96 // The .opd section shndx.
103 return this->special_
;
106 // Init OPD entry arrays.
108 init_opd(size_t opd_size
)
110 size_t count
= this->opd_ent_ndx(opd_size
);
111 this->opd_ent_
.resize(count
);
114 // Return section and offset of function entry for .opd + R_OFF.
116 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
118 size_t ndx
= this->opd_ent_ndx(r_off
);
119 gold_assert(ndx
< this->opd_ent_
.size());
120 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
122 *value
= this->opd_ent_
[ndx
].off
;
123 return this->opd_ent_
[ndx
].shndx
;
126 // Set section and offset of function entry for .opd + R_OFF.
128 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
130 size_t ndx
= this->opd_ent_ndx(r_off
);
131 gold_assert(ndx
< this->opd_ent_
.size());
132 this->opd_ent_
[ndx
].shndx
= shndx
;
133 this->opd_ent_
[ndx
].off
= value
;
136 // Return discard flag for .opd + R_OFF.
138 get_opd_discard(Address r_off
) const
140 size_t ndx
= this->opd_ent_ndx(r_off
);
141 gold_assert(ndx
< this->opd_ent_
.size());
142 return this->opd_ent_
[ndx
].discard
;
145 // Set discard flag for .opd + R_OFF.
147 set_opd_discard(Address r_off
)
149 size_t ndx
= this->opd_ent_ndx(r_off
);
150 gold_assert(ndx
< this->opd_ent_
.size());
151 this->opd_ent_
[ndx
].discard
= true;
156 { return this->opd_valid_
; }
160 { this->opd_valid_
= true; }
162 // Examine .rela.opd to build info about function entry points.
164 scan_opd_relocs(size_t reloc_count
,
165 const unsigned char* prelocs
,
166 const unsigned char* plocal_syms
);
168 // Perform the Sized_relobj_file method, then set up opd info from
171 do_read_relocs(Read_relocs_data
*);
174 do_find_special_sections(Read_symbols_data
* sd
);
176 // Adjust this local symbol value. Return false if the symbol
177 // should be discarded from the output file.
179 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
181 if (size
== 64 && this->opd_shndx() != 0)
184 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
186 if (this->get_opd_discard(lv
->input_value()))
194 { return &this->access_from_map_
; }
196 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
197 // section at DST_OFF.
199 add_reference(Object
* src_obj
,
200 unsigned int src_indx
,
201 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
203 Section_id
src_id(src_obj
, src_indx
);
204 this->access_from_map_
[dst_off
].insert(src_id
);
207 // Add a reference to the code section specified by the .opd entry
210 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
212 size_t ndx
= this->opd_ent_ndx(dst_off
);
213 if (ndx
>= this->opd_ent_
.size())
214 this->opd_ent_
.resize(ndx
+ 1);
215 this->opd_ent_
[ndx
].gc_mark
= true;
219 process_gc_mark(Symbol_table
* symtab
)
221 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
222 if (this->opd_ent_
[i
].gc_mark
)
224 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
225 symtab
->gc()->worklist().push(Section_id(this, shndx
));
229 // Return offset in output GOT section that this object will use
230 // as a TOC pointer. Won't be just a constant with multi-toc support.
232 toc_base_offset() const
236 set_has_small_toc_reloc()
237 { has_small_toc_reloc_
= true; }
240 has_small_toc_reloc() const
241 { return has_small_toc_reloc_
; }
244 set_has_14bit_branch(unsigned int shndx
)
246 if (shndx
>= this->has14_
.size())
247 this->has14_
.resize(shndx
+ 1);
248 this->has14_
[shndx
] = true;
252 has_14bit_branch(unsigned int shndx
) const
253 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
256 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
258 if (shndx
>= this->stub_table_
.size())
259 this->stub_table_
.resize(shndx
+ 1);
260 this->stub_table_
[shndx
] = stub_table
;
263 Stub_table
<size
, big_endian
>*
264 stub_table(unsigned int shndx
)
266 if (shndx
< this->stub_table_
.size())
267 return this->stub_table_
[shndx
];
280 // Return index into opd_ent_ array for .opd entry at OFF.
281 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
282 // apart when the language doesn't use the last 8-byte word, the
283 // environment pointer. Thus dividing the entry section offset by
284 // 16 will give an index into opd_ent_ that works for either layout
285 // of .opd. (It leaves some elements of the vector unused when .opd
286 // entries are spaced 24 bytes apart, but we don't know the spacing
287 // until relocations are processed, and in any case it is possible
288 // for an object to have some entries spaced 16 bytes apart and
289 // others 24 bytes apart.)
291 opd_ent_ndx(size_t off
) const
294 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
295 unsigned int special_
;
297 // For 64-bit, whether this object uses small model relocs to access
299 bool has_small_toc_reloc_
;
301 // Set at the start of gc_process_relocs, when we know opd_ent_
302 // vector is valid. The flag could be made atomic and set in
303 // do_read_relocs with memory_order_release and then tested with
304 // memory_order_acquire, potentially resulting in fewer entries in
308 // The first 8-byte word of an OPD entry gives the address of the
309 // entry point of the function. Relocatable object files have a
310 // relocation on this word. The following vector records the
311 // section and offset specified by these relocations.
312 std::vector
<Opd_ent
> opd_ent_
;
314 // References made to this object's .opd section when running
315 // gc_process_relocs for another object, before the opd_ent_ vector
316 // is valid for this object.
317 Access_from access_from_map_
;
319 // Whether input section has a 14-bit branch reloc.
320 std::vector
<bool> has14_
;
322 // The stub table to use for a given input section.
323 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
326 template<int size
, bool big_endian
>
327 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
330 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
332 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
333 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
334 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
335 opd_shndx_(0), opd_ent_()
341 // Call Sized_dynobj::do_read_symbols to read the symbols then
342 // read .opd from a dynamic object, filling in opd_ent_ vector,
344 do_read_symbols(Read_symbols_data
*);
346 // The .opd section shndx.
350 return this->opd_shndx_
;
353 // The .opd section address.
357 return this->opd_address_
;
360 // Init OPD entry arrays.
362 init_opd(size_t opd_size
)
364 size_t count
= this->opd_ent_ndx(opd_size
);
365 this->opd_ent_
.resize(count
);
368 // Return section and offset of function entry for .opd + R_OFF.
370 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
372 size_t ndx
= this->opd_ent_ndx(r_off
);
373 gold_assert(ndx
< this->opd_ent_
.size());
374 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
376 *value
= this->opd_ent_
[ndx
].off
;
377 return this->opd_ent_
[ndx
].shndx
;
380 // Set section and offset of function entry for .opd + R_OFF.
382 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
384 size_t ndx
= this->opd_ent_ndx(r_off
);
385 gold_assert(ndx
< this->opd_ent_
.size());
386 this->opd_ent_
[ndx
].shndx
= shndx
;
387 this->opd_ent_
[ndx
].off
= value
;
391 // Used to specify extent of executable sections.
394 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
395 : start(start_
), len(len_
), shndx(shndx_
)
399 operator<(const Sec_info
& that
) const
400 { return this->start
< that
.start
; }
413 // Return index into opd_ent_ array for .opd entry at OFF.
415 opd_ent_ndx(size_t off
) const
418 // For 64-bit the .opd section shndx and address.
419 unsigned int opd_shndx_
;
420 Address opd_address_
;
422 // The first 8-byte word of an OPD entry gives the address of the
423 // entry point of the function. Records the section and offset
424 // corresponding to the address. Note that in dynamic objects,
425 // offset is *not* relative to the section.
426 std::vector
<Opd_ent
> opd_ent_
;
429 template<int size
, bool big_endian
>
430 class Target_powerpc
: public Sized_target
<size
, big_endian
>
434 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
435 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
436 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
437 static const Address invalid_address
= static_cast<Address
>(0) - 1;
438 // Offset of tp and dtp pointers from start of TLS block.
439 static const Address tp_offset
= 0x7000;
440 static const Address dtp_offset
= 0x8000;
443 : Sized_target
<size
, big_endian
>(&powerpc_info
),
444 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
445 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
446 dynbss_(NULL
), tlsld_got_offset_(-1U),
447 stub_tables_(), branch_lookup_table_(), branch_info_(),
448 plt_thread_safe_(false)
452 // Process the relocations to determine unreferenced sections for
453 // garbage collection.
455 gc_process_relocs(Symbol_table
* symtab
,
457 Sized_relobj_file
<size
, big_endian
>* object
,
458 unsigned int data_shndx
,
459 unsigned int sh_type
,
460 const unsigned char* prelocs
,
462 Output_section
* output_section
,
463 bool needs_special_offset_handling
,
464 size_t local_symbol_count
,
465 const unsigned char* plocal_symbols
);
467 // Scan the relocations to look for symbol adjustments.
469 scan_relocs(Symbol_table
* symtab
,
471 Sized_relobj_file
<size
, big_endian
>* object
,
472 unsigned int data_shndx
,
473 unsigned int sh_type
,
474 const unsigned char* prelocs
,
476 Output_section
* output_section
,
477 bool needs_special_offset_handling
,
478 size_t local_symbol_count
,
479 const unsigned char* plocal_symbols
);
481 // Map input .toc section to output .got section.
483 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
485 if (size
== 64 && strcmp(name
, ".toc") == 0)
493 // Provide linker defined save/restore functions.
495 define_save_restore_funcs(Layout
*, Symbol_table
*);
497 // No stubs unless a final link.
500 { return !parameters
->options().relocatable(); }
503 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
506 do_plt_fde_location(const Output_data
*, unsigned char*,
507 uint64_t*, off_t
*) const;
509 // Stash info about branches, for stub generation.
511 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
512 unsigned int data_shndx
, Address r_offset
,
513 unsigned int r_type
, unsigned int r_sym
, Address addend
)
515 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
516 this->branch_info_
.push_back(info
);
517 if (r_type
== elfcpp::R_POWERPC_REL14
518 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
519 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
520 ppc_object
->set_has_14bit_branch(data_shndx
);
523 Stub_table
<size
, big_endian
>*
527 do_define_standard_symbols(Symbol_table
*, Layout
*);
529 // Finalize the sections.
531 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
533 // Return the value to use for a dynamic which requires special
536 do_dynsym_value(const Symbol
*) const;
538 // Return the PLT address to use for a local symbol.
540 do_plt_address_for_local(const Relobj
*, unsigned int) const;
542 // Return the PLT address to use for a global symbol.
544 do_plt_address_for_global(const Symbol
*) const;
546 // Return the offset to use for the GOT_INDX'th got entry which is
547 // for a local tls symbol specified by OBJECT, SYMNDX.
549 do_tls_offset_for_local(const Relobj
* object
,
551 unsigned int got_indx
) const;
553 // Return the offset to use for the GOT_INDX'th got entry which is
554 // for global tls symbol GSYM.
556 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
559 do_function_location(Symbol_location
*) const;
562 do_can_check_for_function_pointers() const
565 // Relocate a section.
567 relocate_section(const Relocate_info
<size
, big_endian
>*,
568 unsigned int sh_type
,
569 const unsigned char* prelocs
,
571 Output_section
* output_section
,
572 bool needs_special_offset_handling
,
574 Address view_address
,
575 section_size_type view_size
,
576 const Reloc_symbol_changes
*);
578 // Scan the relocs during a relocatable link.
580 scan_relocatable_relocs(Symbol_table
* symtab
,
582 Sized_relobj_file
<size
, big_endian
>* object
,
583 unsigned int data_shndx
,
584 unsigned int sh_type
,
585 const unsigned char* prelocs
,
587 Output_section
* output_section
,
588 bool needs_special_offset_handling
,
589 size_t local_symbol_count
,
590 const unsigned char* plocal_symbols
,
591 Relocatable_relocs
*);
593 // Emit relocations for a section.
595 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
596 unsigned int sh_type
,
597 const unsigned char* prelocs
,
599 Output_section
* output_section
,
600 typename
elfcpp::Elf_types
<size
>::Elf_Off
601 offset_in_output_section
,
602 const Relocatable_relocs
*,
604 Address view_address
,
606 unsigned char* reloc_view
,
607 section_size_type reloc_view_size
);
609 // Return whether SYM is defined by the ABI.
611 do_is_defined_by_abi(const Symbol
* sym
) const
613 return strcmp(sym
->name(), "__tls_get_addr") == 0;
616 // Return the size of the GOT section.
620 gold_assert(this->got_
!= NULL
);
621 return this->got_
->data_size();
624 // Get the PLT section.
625 const Output_data_plt_powerpc
<size
, big_endian
>*
628 gold_assert(this->plt_
!= NULL
);
632 // Get the IPLT section.
633 const Output_data_plt_powerpc
<size
, big_endian
>*
636 gold_assert(this->iplt_
!= NULL
);
640 // Get the .glink section.
641 const Output_data_glink
<size
, big_endian
>*
642 glink_section() const
644 gold_assert(this->glink_
!= NULL
);
648 bool has_glink() const
649 { return this->glink_
!= NULL
; }
651 // Get the GOT section.
652 const Output_data_got_powerpc
<size
, big_endian
>*
655 gold_assert(this->got_
!= NULL
);
659 // Get the GOT section, creating it if necessary.
660 Output_data_got_powerpc
<size
, big_endian
>*
661 got_section(Symbol_table
*, Layout
*);
664 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
665 const elfcpp::Ehdr
<size
, big_endian
>&);
667 // Return the number of entries in the GOT.
669 got_entry_count() const
671 if (this->got_
== NULL
)
673 return this->got_size() / (size
/ 8);
676 // Return the number of entries in the PLT.
678 plt_entry_count() const;
680 // Return the offset of the first non-reserved PLT entry.
682 first_plt_entry_offset() const;
684 // Return the size of each PLT entry.
686 plt_entry_size() const;
688 // Add any special sections for this symbol to the gc work list.
689 // For powerpc64, this adds the code section of a function
692 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
694 // Handle target specific gc actions when adding a gc reference from
695 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
696 // and DST_OFF. For powerpc64, this adds a referenc to the code
697 // section of a function descriptor.
699 do_gc_add_reference(Symbol_table
* symtab
,
701 unsigned int src_shndx
,
703 unsigned int dst_shndx
,
704 Address dst_off
) const;
706 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
709 { return this->stub_tables_
; }
711 const Output_data_brlt_powerpc
<size
, big_endian
>*
713 { return this->brlt_section_
; }
716 add_branch_lookup_table(Address to
)
718 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
719 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
723 find_branch_lookup_table(Address to
)
725 typename
Branch_lookup_table::const_iterator p
726 = this->branch_lookup_table_
.find(to
);
727 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
731 write_branch_lookup_table(unsigned char *oview
)
733 for (typename
Branch_lookup_table::const_iterator p
734 = this->branch_lookup_table_
.begin();
735 p
!= this->branch_lookup_table_
.end();
738 elfcpp::Swap
<size
, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
743 plt_thread_safe() const
744 { return this->plt_thread_safe_
; }
760 : tls_get_addr_(NOT_EXPECTED
),
761 relinfo_(NULL
), relnum_(0), r_offset_(0)
766 if (this->tls_get_addr_
!= NOT_EXPECTED
)
773 if (this->relinfo_
!= NULL
)
774 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
775 _("missing expected __tls_get_addr call"));
779 expect_tls_get_addr_call(
780 const Relocate_info
<size
, big_endian
>* relinfo
,
784 this->tls_get_addr_
= EXPECTED
;
785 this->relinfo_
= relinfo
;
786 this->relnum_
= relnum
;
787 this->r_offset_
= r_offset
;
791 expect_tls_get_addr_call()
792 { this->tls_get_addr_
= EXPECTED
; }
795 skip_next_tls_get_addr_call()
796 {this->tls_get_addr_
= SKIP
; }
799 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
801 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
802 || r_type
== elfcpp::R_PPC_PLTREL24
)
804 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
805 Tls_get_addr last_tls
= this->tls_get_addr_
;
806 this->tls_get_addr_
= NOT_EXPECTED
;
807 if (is_tls_call
&& last_tls
!= EXPECTED
)
809 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
818 // What we're up to regarding calls to __tls_get_addr.
819 // On powerpc, the branch and link insn making a call to
820 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
821 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
822 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
823 // The marker relocation always comes first, and has the same
824 // symbol as the reloc on the insn setting up the __tls_get_addr
825 // argument. This ties the arg setup insn with the call insn,
826 // allowing ld to safely optimize away the call. We check that
827 // every call to __tls_get_addr has a marker relocation, and that
828 // every marker relocation is on a call to __tls_get_addr.
829 Tls_get_addr tls_get_addr_
;
830 // Info about the last reloc for error message.
831 const Relocate_info
<size
, big_endian
>* relinfo_
;
836 // The class which scans relocations.
837 class Scan
: protected Track_tls
840 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
843 : Track_tls(), issued_non_pic_error_(false)
847 get_reference_flags(unsigned int r_type
);
850 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
851 Sized_relobj_file
<size
, big_endian
>* object
,
852 unsigned int data_shndx
,
853 Output_section
* output_section
,
854 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
855 const elfcpp::Sym
<size
, big_endian
>& lsym
,
859 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
860 Sized_relobj_file
<size
, big_endian
>* object
,
861 unsigned int data_shndx
,
862 Output_section
* output_section
,
863 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
867 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
869 Sized_relobj_file
<size
, big_endian
>* ,
872 const elfcpp::Rela
<size
, big_endian
>& ,
874 const elfcpp::Sym
<size
, big_endian
>&)
876 // PowerPC64 .opd is not folded, so any identical function text
877 // may be folded and we'll still keep function addresses distinct.
878 // That means no reloc is of concern here.
881 // For 32-bit, conservatively assume anything but calls to
882 // function code might be taking the address of the function.
883 return !is_branch_reloc(r_type
);
887 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
889 Sized_relobj_file
<size
, big_endian
>* ,
892 const elfcpp::Rela
<size
, big_endian
>& ,
899 return !is_branch_reloc(r_type
);
903 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
904 unsigned int r_type
, bool report_err
);
908 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
909 unsigned int r_type
);
912 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
913 unsigned int r_type
, Symbol
*);
916 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
917 Target_powerpc
* target
);
920 check_non_pic(Relobj
*, unsigned int r_type
);
922 // Whether we have issued an error about a non-PIC compilation.
923 bool issued_non_pic_error_
;
927 symval_for_branch(const Symbol_table
* symtab
, Address value
,
928 const Sized_symbol
<size
>* gsym
,
929 Powerpc_relobj
<size
, big_endian
>* object
,
930 unsigned int *dest_shndx
);
932 // The class which implements relocation.
933 class Relocate
: protected Track_tls
936 // Use 'at' branch hints when true, 'y' when false.
937 // FIXME maybe: set this with an option.
938 static const bool is_isa_v2
= true;
944 // Do a relocation. Return false if the caller should not issue
945 // any warnings about this relocation.
947 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
948 Output_section
*, size_t relnum
,
949 const elfcpp::Rela
<size
, big_endian
>&,
950 unsigned int r_type
, const Sized_symbol
<size
>*,
951 const Symbol_value
<size
>*,
953 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
957 class Relocate_comdat_behavior
960 // Decide what the linker should do for relocations that refer to
961 // discarded comdat sections.
962 inline Comdat_behavior
963 get(const char* name
)
965 gold::Default_comdat_behavior default_behavior
;
966 Comdat_behavior ret
= default_behavior
.get(name
);
967 if (ret
== CB_WARNING
)
970 && (strcmp(name
, ".fixup") == 0
971 || strcmp(name
, ".got2") == 0))
974 && (strcmp(name
, ".opd") == 0
975 || strcmp(name
, ".toc") == 0
976 || strcmp(name
, ".toc1") == 0))
983 // A class which returns the size required for a relocation type,
984 // used while scanning relocs during a relocatable link.
985 class Relocatable_size_for_reloc
989 get_size_for_reloc(unsigned int, Relobj
*)
996 // Optimize the TLS relocation type based on what we know about the
997 // symbol. IS_FINAL is true if the final address of this symbol is
998 // known at link time.
1000 tls::Tls_optimization
1001 optimize_tls_gd(bool is_final
)
1003 // If we are generating a shared library, then we can't do anything
1005 if (parameters
->options().shared())
1006 return tls::TLSOPT_NONE
;
1009 return tls::TLSOPT_TO_IE
;
1010 return tls::TLSOPT_TO_LE
;
1013 tls::Tls_optimization
1016 if (parameters
->options().shared())
1017 return tls::TLSOPT_NONE
;
1019 return tls::TLSOPT_TO_LE
;
1022 tls::Tls_optimization
1023 optimize_tls_ie(bool is_final
)
1025 if (!is_final
|| parameters
->options().shared())
1026 return tls::TLSOPT_NONE
;
1028 return tls::TLSOPT_TO_LE
;
1033 make_glink_section(Layout
*);
1035 // Create the PLT section.
1037 make_plt_section(Symbol_table
*, Layout
*);
1040 make_iplt_section(Symbol_table
*, Layout
*);
1043 make_brlt_section(Layout
*);
1045 // Create a PLT entry for a global symbol.
1047 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1049 // Create a PLT entry for a local IFUNC symbol.
1051 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1052 Sized_relobj_file
<size
, big_endian
>*,
1056 // Create a GOT entry for local dynamic __tls_get_addr.
1058 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1059 Sized_relobj_file
<size
, big_endian
>* object
);
1062 tlsld_got_offset() const
1064 return this->tlsld_got_offset_
;
1067 // Get the dynamic reloc section, creating it if necessary.
1069 rela_dyn_section(Layout
*);
1071 // Similarly, but for ifunc symbols get the one for ifunc.
1073 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1075 // Copy a relocation against a global symbol.
1077 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1078 Sized_relobj_file
<size
, big_endian
>* object
,
1079 unsigned int shndx
, Output_section
* output_section
,
1080 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1082 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1083 symtab
->get_sized_symbol
<size
>(sym
),
1084 object
, shndx
, output_section
,
1085 reloc
, this->rela_dyn_section(layout
));
1088 // Look over all the input sections, deciding where to place stubs.
1090 group_sections(Layout
*, const Task
*);
1092 // Sort output sections by address.
1093 struct Sort_sections
1096 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1097 { return sec1
->address() < sec2
->address(); }
1103 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1104 unsigned int data_shndx
,
1106 unsigned int r_type
,
1109 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1110 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1116 // If this branch needs a plt call stub, or a long branch stub, make one.
1118 make_stub(Stub_table
<size
, big_endian
>*,
1119 Stub_table
<size
, big_endian
>*,
1120 Symbol_table
*) const;
1123 // The branch location..
1124 Powerpc_relobj
<size
, big_endian
>* object_
;
1125 unsigned int shndx_
;
1127 // ..and the branch type and destination.
1128 unsigned int r_type_
;
1129 unsigned int r_sym_
;
1133 // Information about this specific target which we pass to the
1134 // general Target structure.
1135 static Target::Target_info powerpc_info
;
1137 // The types of GOT entries needed for this platform.
1138 // These values are exposed to the ABI in an incremental link.
1139 // Do not renumber existing values without changing the version
1140 // number of the .gnu_incremental_inputs section.
1144 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1145 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1146 GOT_TYPE_TPREL
// entry for @got@tprel
1150 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1151 // The PLT section. This is a container for a table of addresses,
1152 // and their relocations. Each address in the PLT has a dynamic
1153 // relocation (R_*_JMP_SLOT) and each address will have a
1154 // corresponding entry in .glink for lazy resolution of the PLT.
1155 // ppc32 initialises the PLT to point at the .glink entry, while
1156 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1157 // linker adds a stub that loads the PLT entry into ctr then
1158 // branches to ctr. There may be more than one stub for each PLT
1159 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1160 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1161 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1162 // The IPLT section. Like plt_, this is a container for a table of
1163 // addresses and their relocations, specifically for STT_GNU_IFUNC
1164 // functions that resolve locally (STT_GNU_IFUNC functions that
1165 // don't resolve locally go in PLT). Unlike plt_, these have no
1166 // entry in .glink for lazy resolution, and the relocation section
1167 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1168 // the relocation section may contain relocations against
1169 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1170 // relocation section will appear at the end of other dynamic
1171 // relocations, so that ld.so applies these relocations after other
1172 // dynamic relocations. In a static executable, the relocation
1173 // section is emitted and marked with __rela_iplt_start and
1174 // __rela_iplt_end symbols.
1175 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1176 // Section holding long branch destinations.
1177 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1178 // The .glink section.
1179 Output_data_glink
<size
, big_endian
>* glink_
;
1180 // The dynamic reloc section.
1181 Reloc_section
* rela_dyn_
;
1182 // Relocs saved to avoid a COPY reloc.
1183 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1184 // Space for variables copied with a COPY reloc.
1185 Output_data_space
* dynbss_
;
1186 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1187 unsigned int tlsld_got_offset_
;
1189 Stub_tables stub_tables_
;
1190 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1191 Branch_lookup_table branch_lookup_table_
;
1193 typedef std::vector
<Branch_info
> Branches
;
1194 Branches branch_info_
;
1196 bool plt_thread_safe_
;
1200 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1203 true, // is_big_endian
1204 elfcpp::EM_PPC
, // machine_code
1205 false, // has_make_symbol
1206 false, // has_resolve
1207 false, // has_code_fill
1208 true, // is_default_stack_executable
1209 false, // can_icf_inline_merge_sections
1211 "/usr/lib/ld.so.1", // dynamic_linker
1212 0x10000000, // default_text_segment_address
1213 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1214 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1215 false, // isolate_execinstr
1217 elfcpp::SHN_UNDEF
, // small_common_shndx
1218 elfcpp::SHN_UNDEF
, // large_common_shndx
1219 0, // small_common_section_flags
1220 0, // large_common_section_flags
1221 NULL
, // attributes_section
1222 NULL
, // attributes_vendor
1223 "_start" // entry_symbol_name
1227 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1230 false, // is_big_endian
1231 elfcpp::EM_PPC
, // machine_code
1232 false, // has_make_symbol
1233 false, // has_resolve
1234 false, // has_code_fill
1235 true, // is_default_stack_executable
1236 false, // can_icf_inline_merge_sections
1238 "/usr/lib/ld.so.1", // dynamic_linker
1239 0x10000000, // default_text_segment_address
1240 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1241 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1242 false, // isolate_execinstr
1244 elfcpp::SHN_UNDEF
, // small_common_shndx
1245 elfcpp::SHN_UNDEF
, // large_common_shndx
1246 0, // small_common_section_flags
1247 0, // large_common_section_flags
1248 NULL
, // attributes_section
1249 NULL
, // attributes_vendor
1250 "_start" // entry_symbol_name
1254 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1257 true, // is_big_endian
1258 elfcpp::EM_PPC64
, // machine_code
1259 false, // has_make_symbol
1260 false, // has_resolve
1261 false, // has_code_fill
1262 true, // is_default_stack_executable
1263 false, // can_icf_inline_merge_sections
1265 "/usr/lib/ld.so.1", // dynamic_linker
1266 0x10000000, // default_text_segment_address
1267 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1268 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1269 false, // isolate_execinstr
1271 elfcpp::SHN_UNDEF
, // small_common_shndx
1272 elfcpp::SHN_UNDEF
, // large_common_shndx
1273 0, // small_common_section_flags
1274 0, // large_common_section_flags
1275 NULL
, // attributes_section
1276 NULL
, // attributes_vendor
1277 "_start" // entry_symbol_name
1281 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1284 false, // is_big_endian
1285 elfcpp::EM_PPC64
, // machine_code
1286 false, // has_make_symbol
1287 false, // has_resolve
1288 false, // has_code_fill
1289 true, // is_default_stack_executable
1290 false, // can_icf_inline_merge_sections
1292 "/usr/lib/ld.so.1", // dynamic_linker
1293 0x10000000, // default_text_segment_address
1294 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1295 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1296 false, // isolate_execinstr
1298 elfcpp::SHN_UNDEF
, // small_common_shndx
1299 elfcpp::SHN_UNDEF
, // large_common_shndx
1300 0, // small_common_section_flags
1301 0, // large_common_section_flags
1302 NULL
, // attributes_section
1303 NULL
, // attributes_vendor
1304 "_start" // entry_symbol_name
1308 is_branch_reloc(unsigned int r_type
)
1310 return (r_type
== elfcpp::R_POWERPC_REL24
1311 || r_type
== elfcpp::R_PPC_PLTREL24
1312 || r_type
== elfcpp::R_PPC_LOCAL24PC
1313 || r_type
== elfcpp::R_POWERPC_REL14
1314 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1315 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1316 || r_type
== elfcpp::R_POWERPC_ADDR24
1317 || r_type
== elfcpp::R_POWERPC_ADDR14
1318 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1319 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1322 // If INSN is an opcode that may be used with an @tls operand, return
1323 // the transformed insn for TLS optimisation, otherwise return 0. If
1324 // REG is non-zero only match an insn with RB or RA equal to REG.
1326 at_tls_transform(uint32_t insn
, unsigned int reg
)
1328 if ((insn
& (0x3f << 26)) != 31 << 26)
1332 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1333 rtra
= insn
& ((1 << 26) - (1 << 16));
1334 else if (((insn
>> 16) & 0x1f) == reg
)
1335 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1339 if ((insn
& (0x3ff << 1)) == 266 << 1)
1342 else if ((insn
& (0x1f << 1)) == 23 << 1
1343 && ((insn
& (0x1f << 6)) < 14 << 6
1344 || ((insn
& (0x1f << 6)) >= 16 << 6
1345 && (insn
& (0x1f << 6)) < 24 << 6)))
1346 // load and store indexed -> dform
1347 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1348 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1349 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1350 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1351 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1353 insn
= (58 << 26) | 2;
1360 // Modified version of symtab.h class Symbol member
1361 // Given a direct absolute or pc-relative static relocation against
1362 // the global symbol, this function returns whether a dynamic relocation
1367 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1369 // No dynamic relocations in a static link!
1370 if (parameters
->doing_static_link())
1373 // A reference to an undefined symbol from an executable should be
1374 // statically resolved to 0, and does not need a dynamic relocation.
1375 // This matches gnu ld behavior.
1376 if (gsym
->is_undefined() && !parameters
->options().shared())
1379 // A reference to an absolute symbol does not need a dynamic relocation.
1380 if (gsym
->is_absolute())
1383 // An absolute reference within a position-independent output file
1384 // will need a dynamic relocation.
1385 if ((flags
& Symbol::ABSOLUTE_REF
)
1386 && parameters
->options().output_is_position_independent())
1389 // A function call that can branch to a local PLT entry does not need
1390 // a dynamic relocation.
1391 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1394 // A reference to any PLT entry in a non-position-independent executable
1395 // does not need a dynamic relocation.
1396 // Except due to having function descriptors on powerpc64 we don't define
1397 // functions to their plt code in an executable, so this doesn't apply.
1399 && !parameters
->options().output_is_position_independent()
1400 && gsym
->has_plt_offset())
1403 // A reference to a symbol defined in a dynamic object or to a
1404 // symbol that is preemptible will need a dynamic relocation.
1405 if (gsym
->is_from_dynobj()
1406 || gsym
->is_undefined()
1407 || gsym
->is_preemptible())
1410 // For all other cases, return FALSE.
1414 // Modified version of symtab.h class Symbol member
1415 // Whether we should use the PLT offset associated with a symbol for
1416 // a relocation. FLAGS is a set of Reference_flags.
1420 use_plt_offset(const Symbol
* gsym
, int flags
)
1422 // If the symbol doesn't have a PLT offset, then naturally we
1423 // don't want to use it.
1424 if (!gsym
->has_plt_offset())
1427 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1428 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1431 // If we are going to generate a dynamic relocation, then we will
1432 // wind up using that, so no need to use the PLT entry.
1433 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1436 // If the symbol is from a dynamic object, we need to use the PLT
1438 if (gsym
->is_from_dynobj())
1441 // If we are generating a shared object, and this symbol is
1442 // undefined or preemptible, we need to use the PLT entry.
1443 if (parameters
->options().shared()
1444 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1447 // If this is a call to a weak undefined symbol, we need to use
1448 // the PLT entry; the symbol may be defined by a library loaded
1450 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1453 // Otherwise we can use the regular definition.
1457 template<int size
, bool big_endian
>
1458 class Powerpc_relocate_functions
1475 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1476 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1478 template<int valsize
>
1480 has_overflow_signed(Address value
)
1482 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1483 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1484 limit
<<= ((valsize
- 1) >> 1);
1485 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1486 return value
+ limit
> (limit
<< 1) - 1;
1489 template<int valsize
>
1491 has_overflow_bitfield(Address value
)
1493 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1494 limit
<<= ((valsize
- 1) >> 1);
1495 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1496 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1499 template<int valsize
>
1500 static inline Status
1501 overflowed(Address value
, Overflow_check overflow
)
1503 if (overflow
== CHECK_SIGNED
)
1505 if (has_overflow_signed
<valsize
>(value
))
1506 return STATUS_OVERFLOW
;
1508 else if (overflow
== CHECK_BITFIELD
)
1510 if (has_overflow_bitfield
<valsize
>(value
))
1511 return STATUS_OVERFLOW
;
1516 // Do a simple RELA relocation
1517 template<int valsize
>
1518 static inline Status
1519 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1521 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1522 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1523 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1524 return overflowed
<valsize
>(value
, overflow
);
1527 template<int valsize
>
1528 static inline Status
1529 rela(unsigned char* view
,
1530 unsigned int right_shift
,
1531 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1533 Overflow_check overflow
)
1535 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1536 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1537 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1538 Valtype reloc
= value
>> right_shift
;
1541 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1542 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1545 // Do a simple RELA relocation, unaligned.
1546 template<int valsize
>
1547 static inline Status
1548 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1550 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1551 return overflowed
<valsize
>(value
, overflow
);
1554 template<int valsize
>
1555 static inline Status
1556 rela_ua(unsigned char* view
,
1557 unsigned int right_shift
,
1558 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1560 Overflow_check overflow
)
1562 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1564 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1565 Valtype reloc
= value
>> right_shift
;
1568 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1569 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1573 // R_PPC64_ADDR64: (Symbol + Addend)
1575 addr64(unsigned char* view
, Address value
)
1576 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1578 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1580 addr64_u(unsigned char* view
, Address value
)
1581 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1583 // R_POWERPC_ADDR32: (Symbol + Addend)
1584 static inline Status
1585 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1586 { return This::template rela
<32>(view
, value
, overflow
); }
1588 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1589 static inline Status
1590 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1591 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1593 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1594 static inline Status
1595 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1597 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1598 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1599 stat
= STATUS_OVERFLOW
;
1603 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1604 static inline Status
1605 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1606 { return This::template rela
<16>(view
, value
, overflow
); }
1608 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1609 static inline Status
1610 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1611 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1613 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1614 static inline Status
1615 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1617 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1618 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1619 stat
= STATUS_OVERFLOW
;
1623 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1625 addr16_hi(unsigned char* view
, Address value
)
1626 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1628 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1630 addr16_ha(unsigned char* view
, Address value
)
1631 { This::addr16_hi(view
, value
+ 0x8000); }
1633 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1635 addr16_hi2(unsigned char* view
, Address value
)
1636 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1638 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1640 addr16_ha2(unsigned char* view
, Address value
)
1641 { This::addr16_hi2(view
, value
+ 0x8000); }
1643 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1645 addr16_hi3(unsigned char* view
, Address value
)
1646 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1648 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1650 addr16_ha3(unsigned char* view
, Address value
)
1651 { This::addr16_hi3(view
, value
+ 0x8000); }
1653 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1654 static inline Status
1655 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1657 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1658 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1659 stat
= STATUS_OVERFLOW
;
1664 // Stash away the index of .got2 or .opd in a relocatable object, if
1665 // such a section exists.
1667 template<int size
, bool big_endian
>
1669 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1670 Read_symbols_data
* sd
)
1672 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1673 const unsigned char* namesu
= sd
->section_names
->data();
1674 const char* names
= reinterpret_cast<const char*>(namesu
);
1675 section_size_type names_size
= sd
->section_names_size
;
1676 const unsigned char* s
;
1678 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1679 size
== 32 ? ".got2" : ".opd",
1680 names
, names_size
, NULL
);
1683 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1684 this->special_
= ndx
;
1686 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1689 // Examine .rela.opd to build info about function entry points.
1691 template<int size
, bool big_endian
>
1693 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1695 const unsigned char* prelocs
,
1696 const unsigned char* plocal_syms
)
1700 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1702 const int reloc_size
1703 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1704 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1705 Address expected_off
= 0;
1706 bool regular
= true;
1707 unsigned int opd_ent_size
= 0;
1709 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1711 Reltype
reloc(prelocs
);
1712 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1713 = reloc
.get_r_info();
1714 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1715 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1717 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1718 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1721 if (r_sym
< this->local_symbol_count())
1723 typename
elfcpp::Sym
<size
, big_endian
>
1724 lsym(plocal_syms
+ r_sym
* sym_size
);
1725 shndx
= lsym
.get_st_shndx();
1726 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1727 value
= lsym
.get_st_value();
1730 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1732 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1733 value
+ reloc
.get_r_addend());
1736 expected_off
= reloc
.get_r_offset();
1737 opd_ent_size
= expected_off
;
1739 else if (expected_off
!= reloc
.get_r_offset())
1741 expected_off
+= opd_ent_size
;
1743 else if (r_type
== elfcpp::R_PPC64_TOC
)
1745 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1750 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1751 this->name().c_str(), r_type
);
1755 if (reloc_count
<= 2)
1756 opd_ent_size
= this->section_size(this->opd_shndx());
1757 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1761 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1762 this->name().c_str());
1768 template<int size
, bool big_endian
>
1770 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1772 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1775 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1776 p
!= rd
->relocs
.end();
1779 if (p
->data_shndx
== this->opd_shndx())
1781 uint64_t opd_size
= this->section_size(this->opd_shndx());
1782 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1785 this->init_opd(opd_size
);
1786 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1787 rd
->local_symbols
->data());
1795 // Call Sized_dynobj::do_read_symbols to read the symbols then
1796 // read .opd from a dynamic object, filling in opd_ent_ vector,
1798 template<int size
, bool big_endian
>
1800 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1802 Sized_dynobj
<size
, big_endian
>::do_read_symbols(sd
);
1805 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1806 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1807 const unsigned char* namesu
= sd
->section_names
->data();
1808 const char* names
= reinterpret_cast<const char*>(namesu
);
1809 const unsigned char* s
= NULL
;
1810 const unsigned char* opd
;
1811 section_size_type opd_size
;
1813 // Find and read .opd section.
1816 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1817 sd
->section_names_size
,
1822 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1823 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1824 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1826 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1827 this->opd_address_
= shdr
.get_sh_addr();
1828 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1829 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1835 // Build set of executable sections.
1836 // Using a set is probably overkill. There is likely to be only
1837 // a few executable sections, typically .init, .text and .fini,
1838 // and they are generally grouped together.
1839 typedef std::set
<Sec_info
> Exec_sections
;
1840 Exec_sections exec_sections
;
1842 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
1844 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1845 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1846 && ((shdr
.get_sh_flags()
1847 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1848 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1849 && shdr
.get_sh_size() != 0)
1851 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
1852 shdr
.get_sh_size(), i
));
1855 if (exec_sections
.empty())
1858 // Look over the OPD entries. This is complicated by the fact
1859 // that some binaries will use two-word entries while others
1860 // will use the standard three-word entries. In most cases
1861 // the third word (the environment pointer for languages like
1862 // Pascal) is unused and will be zero. If the third word is
1863 // used it should not be pointing into executable sections,
1865 this->init_opd(opd_size
);
1866 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
1868 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
1869 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
1870 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
1872 // Chances are that this is the third word of an OPD entry.
1874 typename
Exec_sections::const_iterator e
1875 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
1876 if (e
!= exec_sections
.begin())
1879 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
1881 // We have an address in an executable section.
1882 // VAL ought to be the function entry, set it up.
1883 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
1884 // Skip second word of OPD entry, the TOC pointer.
1888 // If we didn't match any executable sections, we likely
1889 // have a non-zero third word in the OPD entry.
1894 // Set up some symbols.
1896 template<int size
, bool big_endian
>
1898 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1899 Symbol_table
* symtab
,
1904 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1905 // undefined when scanning relocs (and thus requires
1906 // non-relative dynamic relocs). The proper value will be
1908 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1909 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1911 Target_powerpc
<size
, big_endian
>* target
=
1912 static_cast<Target_powerpc
<size
, big_endian
>*>(
1913 parameters
->sized_target
<size
, big_endian
>());
1914 Output_data_got_powerpc
<size
, big_endian
>* got
1915 = target
->got_section(symtab
, layout
);
1916 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1917 Symbol_table::PREDEFINED
,
1921 elfcpp::STV_HIDDEN
, 0,
1925 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1926 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1927 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1929 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1931 = layout
->add_output_section_data(".sdata", 0,
1933 | elfcpp::SHF_WRITE
,
1934 sdata
, ORDER_SMALL_DATA
, false);
1935 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1936 Symbol_table::PREDEFINED
,
1937 os
, 32768, 0, elfcpp::STT_OBJECT
,
1938 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1944 // Set up PowerPC target specific relobj.
1946 template<int size
, bool big_endian
>
1948 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1949 const std::string
& name
,
1950 Input_file
* input_file
,
1951 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1953 int et
= ehdr
.get_e_type();
1954 // ET_EXEC files are valid input for --just-symbols/-R,
1955 // and we treat them as relocatable objects.
1956 if (et
== elfcpp::ET_REL
1957 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1959 Powerpc_relobj
<size
, big_endian
>* obj
=
1960 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1964 else if (et
== elfcpp::ET_DYN
)
1966 Powerpc_dynobj
<size
, big_endian
>* obj
=
1967 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1973 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1978 template<int size
, bool big_endian
>
1979 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1982 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1983 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1985 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1986 : Output_data_got
<size
, big_endian
>(),
1987 symtab_(symtab
), layout_(layout
),
1988 header_ent_cnt_(size
== 32 ? 3 : 1),
1989 header_index_(size
== 32 ? 0x2000 : 0)
1994 // Create a new GOT entry and return its offset.
1996 add_got_entry(Got_entry got_entry
)
1998 this->reserve_ent();
1999 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
2002 // Create a pair of new GOT entries and return the offset of the first.
2004 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
2006 this->reserve_ent(2);
2007 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
2012 add_constant_pair(Valtype c1
, Valtype c2
)
2014 this->reserve_ent(2);
2015 unsigned int got_offset
= this->add_constant(c1
);
2016 this->add_constant(c2
);
2020 // Offset of _GLOBAL_OFFSET_TABLE_.
2024 return this->got_offset(this->header_index_
);
2027 // Offset of base used to access the GOT/TOC.
2028 // The got/toc pointer reg will be set to this value.
2030 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2033 return this->g_o_t();
2035 return (this->output_section()->address()
2036 + object
->toc_base_offset()
2040 // Ensure our GOT has a header.
2042 set_final_data_size()
2044 if (this->header_ent_cnt_
!= 0)
2045 this->make_header();
2046 Output_data_got
<size
, big_endian
>::set_final_data_size();
2049 // First word of GOT header needs some values that are not
2050 // handled by Output_data_got so poke them in here.
2051 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2053 do_write(Output_file
* of
)
2056 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2057 val
= this->layout_
->dynamic_section()->address();
2059 val
= this->output_section()->address() + 0x8000;
2060 this->replace_constant(this->header_index_
, val
);
2061 Output_data_got
<size
, big_endian
>::do_write(of
);
2066 reserve_ent(unsigned int cnt
= 1)
2068 if (this->header_ent_cnt_
== 0)
2070 if (this->num_entries() + cnt
> this->header_index_
)
2071 this->make_header();
2077 this->header_ent_cnt_
= 0;
2078 this->header_index_
= this->num_entries();
2081 Output_data_got
<size
, big_endian
>::add_constant(0);
2082 Output_data_got
<size
, big_endian
>::add_constant(0);
2083 Output_data_got
<size
, big_endian
>::add_constant(0);
2085 // Define _GLOBAL_OFFSET_TABLE_ at the header
2086 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2089 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2090 sym
->set_value(this->g_o_t());
2093 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2094 Symbol_table::PREDEFINED
,
2095 this, this->g_o_t(), 0,
2098 elfcpp::STV_HIDDEN
, 0,
2102 Output_data_got
<size
, big_endian
>::add_constant(0);
2105 // Stashed pointers.
2106 Symbol_table
* symtab_
;
2110 unsigned int header_ent_cnt_
;
2111 // GOT header index.
2112 unsigned int header_index_
;
2115 // Get the GOT section, creating it if necessary.
2117 template<int size
, bool big_endian
>
2118 Output_data_got_powerpc
<size
, big_endian
>*
2119 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2122 if (this->got_
== NULL
)
2124 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2127 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2129 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2130 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2131 this->got_
, ORDER_DATA
, false);
2137 // Get the dynamic reloc section, creating it if necessary.
2139 template<int size
, bool big_endian
>
2140 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2141 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2143 if (this->rela_dyn_
== NULL
)
2145 gold_assert(layout
!= NULL
);
2146 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2147 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2148 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2149 ORDER_DYNAMIC_RELOCS
, false);
2151 return this->rela_dyn_
;
2154 // Similarly, but for ifunc symbols get the one for ifunc.
2156 template<int size
, bool big_endian
>
2157 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2158 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2163 return this->rela_dyn_section(layout
);
2165 if (this->iplt_
== NULL
)
2166 this->make_iplt_section(symtab
, layout
);
2167 return this->iplt_
->rel_plt();
2173 // Determine the stub group size. The group size is the absolute
2174 // value of the parameter --stub-group-size. If --stub-group-size
2175 // is passed a negative value, we restrict stubs to be always before
2176 // the stubbed branches.
2177 Stub_control(int32_t size
)
2178 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2179 stub14_group_size_(abs(size
)),
2180 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
2181 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2183 if (stub_group_size_
== 1)
2186 if (stubs_always_before_branch_
)
2188 stub_group_size_
= 0x1e00000;
2189 stub14_group_size_
= 0x7800;
2193 stub_group_size_
= 0x1c00000;
2194 stub14_group_size_
= 0x7000;
2196 suppress_size_errors_
= true;
2200 // Return true iff input section can be handled by current stub
2203 can_add_to_stub_group(Output_section
* o
,
2204 const Output_section::Input_section
* i
,
2207 const Output_section::Input_section
*
2213 { return output_section_
; }
2219 FINDING_STUB_SECTION
,
2224 uint32_t stub_group_size_
;
2225 uint32_t stub14_group_size_
;
2226 bool stubs_always_before_branch_
;
2227 bool suppress_size_errors_
;
2228 uint64_t group_end_addr_
;
2229 const Output_section::Input_section
* owner_
;
2230 Output_section
* output_section_
;
2233 // Return true iff input section can be handled by current stub
2237 Stub_control::can_add_to_stub_group(Output_section
* o
,
2238 const Output_section::Input_section
* i
,
2242 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2243 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2245 uint64_t start_addr
= o
->address();
2248 // .init and .fini sections are pasted together to form a single
2249 // function. We can't be adding stubs in the middle of the function.
2250 this_size
= o
->data_size();
2253 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2254 this_size
= i
->data_size();
2256 uint64_t end_addr
= start_addr
+ this_size
;
2257 bool toobig
= this_size
> group_size
;
2259 if (toobig
&& !this->suppress_size_errors_
)
2260 gold_warning(_("%s:%s exceeds group size"),
2261 i
->relobj()->name().c_str(),
2262 i
->relobj()->section_name(i
->shndx()).c_str());
2264 if (this->state_
!= HAS_STUB_SECTION
2265 && (!whole_sec
|| this->output_section_
!= o
)
2266 && (this->state_
== NO_GROUP
2267 || this->group_end_addr_
- end_addr
< group_size
))
2270 this->output_section_
= o
;
2273 if (this->state_
== NO_GROUP
)
2275 this->state_
= FINDING_STUB_SECTION
;
2276 this->group_end_addr_
= end_addr
;
2278 else if (this->group_end_addr_
- start_addr
< group_size
)
2280 // Adding this section would make the group larger than GROUP_SIZE.
2281 else if (this->state_
== FINDING_STUB_SECTION
2282 && !this->stubs_always_before_branch_
2285 // But wait, there's more! Input sections up to GROUP_SIZE
2286 // bytes before the stub table can be handled by it too.
2287 this->state_
= HAS_STUB_SECTION
;
2288 this->group_end_addr_
= end_addr
;
2292 this->state_
= NO_GROUP
;
2298 // Look over all the input sections, deciding where to place stubs.
2300 template<int size
, bool big_endian
>
2302 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2305 Stub_control
stub_control(parameters
->options().stub_group_size());
2307 // Group input sections and insert stub table
2308 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
2309 Layout::Section_list section_list
;
2310 layout
->get_executable_sections(§ion_list
);
2311 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2312 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2313 o
!= section_list
.rend();
2316 typedef Output_section::Input_section_list Input_section_list
;
2317 for (Input_section_list::const_reverse_iterator i
2318 = (*o
)->input_sections().rbegin();
2319 i
!= (*o
)->input_sections().rend();
2322 if (i
->is_input_section())
2324 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2325 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2326 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2327 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2329 stub_table
->init(stub_control
.owner(),
2330 stub_control
.output_section());
2333 if (stub_table
== NULL
)
2334 stub_table
= this->new_stub_table();
2335 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
2339 if (stub_table
!= NULL
)
2341 const Output_section::Input_section
* i
= stub_control
.owner();
2342 if (!i
->is_input_section())
2344 // Corner case. A new stub group was made for the first
2345 // section (last one looked at here) for some reason, but
2346 // the first section is already being used as the owner for
2347 // a stub table for following sections. Force it into that
2349 gold_assert(this->stub_tables_
.size() >= 2);
2350 this->stub_tables_
.pop_back();
2352 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2353 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2354 ppcobj
->set_stub_table(i
->shndx(), this->stub_tables_
.back());
2357 stub_table
->init(i
, stub_control
.output_section());
2361 // If this branch needs a plt call stub, or a long branch stub, make one.
2363 template<int size
, bool big_endian
>
2365 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2366 Stub_table
<size
, big_endian
>* stub_table
,
2367 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2368 Symbol_table
* symtab
) const
2370 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2371 if (sym
!= NULL
&& sym
->is_forwarder())
2372 sym
= symtab
->resolve_forwards(sym
);
2373 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2375 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
2376 : this->object_
->local_has_plt_offset(this->r_sym_
))
2378 if (stub_table
== NULL
)
2379 stub_table
= this->object_
->stub_table(this->shndx_
);
2380 if (stub_table
== NULL
)
2382 // This is a ref from a data section to an ifunc symbol.
2383 stub_table
= ifunc_stub_table
;
2385 gold_assert(stub_table
!= NULL
);
2387 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2388 this->r_type_
, this->addend_
);
2390 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2391 this->r_type_
, this->addend_
);
2395 unsigned int max_branch_offset
;
2396 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2397 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2398 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2399 max_branch_offset
= 1 << 15;
2400 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2401 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2402 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2403 max_branch_offset
= 1 << 25;
2406 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2407 gold_assert(from
!= invalid_address
);
2408 from
+= (this->object_
->output_section(this->shndx_
)->address()
2413 switch (gsym
->source())
2415 case Symbol::FROM_OBJECT
:
2417 Object
* symobj
= gsym
->object();
2418 if (symobj
->is_dynamic()
2419 || symobj
->pluginobj() != NULL
)
2422 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2423 if (shndx
== elfcpp::SHN_UNDEF
)
2428 case Symbol::IS_UNDEFINED
:
2434 Symbol_table::Compute_final_value_status status
;
2435 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2436 if (status
!= Symbol_table::CFVS_OK
)
2441 const Symbol_value
<size
>* psymval
2442 = this->object_
->local_symbol(this->r_sym_
);
2443 Symbol_value
<size
> symval
;
2444 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2445 typename
ObjType::Compute_final_local_value_status status
2446 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2448 if (status
!= ObjType::CFLV_OK
2449 || !symval
.has_output_value())
2451 to
= symval
.value(this->object_
, 0);
2453 to
+= this->addend_
;
2454 if (stub_table
== NULL
)
2455 stub_table
= this->object_
->stub_table(this->shndx_
);
2456 if (size
== 64 && is_branch_reloc(this->r_type_
))
2458 unsigned int dest_shndx
;
2459 Target_powerpc
<size
, big_endian
>* target
=
2460 static_cast<Target_powerpc
<size
, big_endian
>*>(
2461 parameters
->sized_target
<size
, big_endian
>());
2462 to
= target
->symval_for_branch(symtab
, to
, gsym
,
2463 this->object_
, &dest_shndx
);
2465 Address delta
= to
- from
;
2466 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2468 if (stub_table
== NULL
)
2470 gold_warning(_("%s:%s: branch in non-executable section,"
2471 " no long branch stub for you"),
2472 this->object_
->name().c_str(),
2473 this->object_
->section_name(this->shndx_
).c_str());
2476 stub_table
->add_long_branch_entry(this->object_
, to
);
2481 // Relaxation hook. This is where we do stub generation.
2483 template<int size
, bool big_endian
>
2485 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2486 const Input_objects
*,
2487 Symbol_table
* symtab
,
2491 unsigned int prev_brlt_size
= 0;
2494 bool thread_safe
= parameters
->options().plt_thread_safe();
2495 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2497 static const char* const thread_starter
[] =
2501 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2503 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2504 "mq_notify", "create_timer",
2508 "GOMP_parallel_start",
2509 "GOMP_parallel_loop_static_start",
2510 "GOMP_parallel_loop_dynamic_start",
2511 "GOMP_parallel_loop_guided_start",
2512 "GOMP_parallel_loop_runtime_start",
2513 "GOMP_parallel_sections_start",
2516 if (parameters
->options().shared())
2520 for (unsigned int i
= 0;
2521 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2524 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2525 thread_safe
= (sym
!= NULL
2527 && sym
->in_real_elf());
2533 this->plt_thread_safe_
= thread_safe
;
2534 this->group_sections(layout
, task
);
2537 // We need address of stub tables valid for make_stub.
2538 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2539 p
!= this->stub_tables_
.end();
2542 const Powerpc_relobj
<size
, big_endian
>* object
2543 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2544 Address off
= object
->get_output_section_offset((*p
)->shndx());
2545 gold_assert(off
!= invalid_address
);
2546 Output_section
* os
= (*p
)->output_section();
2547 (*p
)->set_address_and_size(os
, off
);
2552 // Clear plt call stubs, long branch stubs and branch lookup table.
2553 prev_brlt_size
= this->branch_lookup_table_
.size();
2554 this->branch_lookup_table_
.clear();
2555 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2556 p
!= this->stub_tables_
.end();
2559 (*p
)->clear_stubs();
2563 // Build all the stubs.
2564 Stub_table
<size
, big_endian
>* ifunc_stub_table
2565 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2566 Stub_table
<size
, big_endian
>* one_stub_table
2567 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2568 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2569 b
!= this->branch_info_
.end();
2572 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2575 // Did anything change size?
2576 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2577 bool again
= num_huge_branches
!= prev_brlt_size
;
2578 if (size
== 64 && num_huge_branches
!= 0)
2579 this->make_brlt_section(layout
);
2580 if (size
== 64 && again
)
2581 this->brlt_section_
->set_current_size(num_huge_branches
);
2583 typedef Unordered_set
<Output_section
*> Output_sections
;
2584 Output_sections os_need_update
;
2585 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2586 p
!= this->stub_tables_
.end();
2589 if ((*p
)->size_update())
2592 (*p
)->add_eh_frame(layout
);
2593 os_need_update
.insert((*p
)->output_section());
2597 // Set output section offsets for all input sections in an output
2598 // section that just changed size. Anything past the stubs will
2600 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2601 p
!= os_need_update
.end();
2604 Output_section
* os
= *p
;
2606 typedef Output_section::Input_section_list Input_section_list
;
2607 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2608 i
!= os
->input_sections().end();
2611 off
= align_address(off
, i
->addralign());
2612 if (i
->is_input_section() || i
->is_relaxed_input_section())
2613 i
->relobj()->set_section_offset(i
->shndx(), off
);
2614 if (i
->is_relaxed_input_section())
2616 Stub_table
<size
, big_endian
>* stub_table
2617 = static_cast<Stub_table
<size
, big_endian
>*>(
2618 i
->relaxed_input_section());
2619 off
+= stub_table
->set_address_and_size(os
, off
);
2622 off
+= i
->data_size();
2624 // If .branch_lt is part of this output section, then we have
2625 // just done the offset adjustment.
2626 os
->clear_section_offsets_need_adjustment();
2631 && num_huge_branches
!= 0
2632 && parameters
->options().output_is_position_independent())
2634 // Fill in the BRLT relocs.
2635 this->brlt_section_
->reset_brlt_sizes();
2636 for (typename
Branch_lookup_table::const_iterator p
2637 = this->branch_lookup_table_
.begin();
2638 p
!= this->branch_lookup_table_
.end();
2641 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2643 this->brlt_section_
->finalize_brlt_sizes();
2648 template<int size
, bool big_endian
>
2650 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2651 unsigned char* oview
,
2655 uint64_t address
= plt
->address();
2656 off_t len
= plt
->data_size();
2658 if (plt
== this->glink_
)
2660 // See Output_data_glink::do_write() for glink contents.
2663 // There is one word before __glink_PLTresolve
2667 else if (parameters
->options().output_is_position_independent())
2669 // There are two FDEs for a position independent glink.
2670 // The first covers the branch table, the second
2671 // __glink_PLTresolve at the end of glink.
2672 off_t resolve_size
= this->glink_
->pltresolve_size
;
2674 len
-= resolve_size
;
2677 address
+= len
- resolve_size
;
2684 // Must be a stub table.
2685 const Stub_table
<size
, big_endian
>* stub_table
2686 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
2687 uint64_t stub_address
= stub_table
->stub_address();
2688 len
-= stub_address
- address
;
2689 address
= stub_address
;
2692 *paddress
= address
;
2696 // A class to handle the PLT data.
2698 template<int size
, bool big_endian
>
2699 class Output_data_plt_powerpc
: public Output_section_data_build
2702 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2703 size
, big_endian
> Reloc_section
;
2705 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2706 Reloc_section
* plt_rel
,
2707 unsigned int reserved_size
,
2709 : Output_section_data_build(size
== 32 ? 4 : 8),
2712 initial_plt_entry_size_(reserved_size
),
2716 // Add an entry to the PLT.
2721 add_ifunc_entry(Symbol
*);
2724 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2726 // Return the .rela.plt section data.
2733 // Return the number of PLT entries.
2737 if (this->current_data_size() == 0)
2739 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2743 // Return the offset of the first non-reserved PLT entry.
2745 first_plt_entry_offset()
2746 { return this->initial_plt_entry_size_
; }
2748 // Return the size of a PLT entry.
2750 get_plt_entry_size()
2751 { return plt_entry_size
; }
2755 do_adjust_output_section(Output_section
* os
)
2760 // Write to a map file.
2762 do_print_to_mapfile(Mapfile
* mapfile
) const
2763 { mapfile
->print_output_data(this, this->name_
); }
2766 // The size of an entry in the PLT.
2767 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2769 // Write out the PLT data.
2771 do_write(Output_file
*);
2773 // The reloc section.
2774 Reloc_section
* rel_
;
2775 // Allows access to .glink for do_write.
2776 Target_powerpc
<size
, big_endian
>* targ_
;
2777 // The size of the first reserved entry.
2778 int initial_plt_entry_size_
;
2779 // What to report in map file.
2783 // Add an entry to the PLT.
2785 template<int size
, bool big_endian
>
2787 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2789 if (!gsym
->has_plt_offset())
2791 section_size_type off
= this->current_data_size();
2793 off
+= this->first_plt_entry_offset();
2794 gsym
->set_plt_offset(off
);
2795 gsym
->set_needs_dynsym_entry();
2796 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2797 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2798 off
+= plt_entry_size
;
2799 this->set_current_data_size(off
);
2803 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2805 template<int size
, bool big_endian
>
2807 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2809 if (!gsym
->has_plt_offset())
2811 section_size_type off
= this->current_data_size();
2812 gsym
->set_plt_offset(off
);
2813 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2815 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2816 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2817 off
+= plt_entry_size
;
2818 this->set_current_data_size(off
);
2822 // Add an entry for a local ifunc symbol to the IPLT.
2824 template<int size
, bool big_endian
>
2826 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2827 Sized_relobj_file
<size
, big_endian
>* relobj
,
2828 unsigned int local_sym_index
)
2830 if (!relobj
->local_has_plt_offset(local_sym_index
))
2832 section_size_type off
= this->current_data_size();
2833 relobj
->set_local_plt_offset(local_sym_index
, off
);
2834 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2836 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2837 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2839 off
+= plt_entry_size
;
2840 this->set_current_data_size(off
);
2844 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2845 static const uint32_t add_2_2_11
= 0x7c425a14;
2846 static const uint32_t add_3_3_2
= 0x7c631214;
2847 static const uint32_t add_3_3_13
= 0x7c636a14;
2848 static const uint32_t add_11_0_11
= 0x7d605a14;
2849 static const uint32_t add_12_2_11
= 0x7d825a14;
2850 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2851 static const uint32_t addi_11_11
= 0x396b0000;
2852 static const uint32_t addi_12_12
= 0x398c0000;
2853 static const uint32_t addi_2_2
= 0x38420000;
2854 static const uint32_t addi_3_2
= 0x38620000;
2855 static const uint32_t addi_3_3
= 0x38630000;
2856 static const uint32_t addis_0_2
= 0x3c020000;
2857 static const uint32_t addis_0_13
= 0x3c0d0000;
2858 static const uint32_t addis_11_11
= 0x3d6b0000;
2859 static const uint32_t addis_11_30
= 0x3d7e0000;
2860 static const uint32_t addis_12_12
= 0x3d8c0000;
2861 static const uint32_t addis_12_2
= 0x3d820000;
2862 static const uint32_t addis_3_2
= 0x3c620000;
2863 static const uint32_t addis_3_13
= 0x3c6d0000;
2864 static const uint32_t b
= 0x48000000;
2865 static const uint32_t bcl_20_31
= 0x429f0005;
2866 static const uint32_t bctr
= 0x4e800420;
2867 static const uint32_t blr
= 0x4e800020;
2868 static const uint32_t blrl
= 0x4e800021;
2869 static const uint32_t bnectr_p4
= 0x4ce20420;
2870 static const uint32_t cmpldi_2_0
= 0x28220000;
2871 static const uint32_t cror_15_15_15
= 0x4def7b82;
2872 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2873 static const uint32_t ld_0_1
= 0xe8010000;
2874 static const uint32_t ld_0_12
= 0xe80c0000;
2875 static const uint32_t ld_11_12
= 0xe96c0000;
2876 static const uint32_t ld_11_2
= 0xe9620000;
2877 static const uint32_t ld_2_1
= 0xe8410000;
2878 static const uint32_t ld_2_11
= 0xe84b0000;
2879 static const uint32_t ld_2_12
= 0xe84c0000;
2880 static const uint32_t ld_2_2
= 0xe8420000;
2881 static const uint32_t lfd_0_1
= 0xc8010000;
2882 static const uint32_t li_0_0
= 0x38000000;
2883 static const uint32_t li_12_0
= 0x39800000;
2884 static const uint32_t lis_0_0
= 0x3c000000;
2885 static const uint32_t lis_11
= 0x3d600000;
2886 static const uint32_t lis_12
= 0x3d800000;
2887 static const uint32_t lwz_0_12
= 0x800c0000;
2888 static const uint32_t lwz_11_11
= 0x816b0000;
2889 static const uint32_t lwz_11_30
= 0x817e0000;
2890 static const uint32_t lwz_12_12
= 0x818c0000;
2891 static const uint32_t lwzu_0_12
= 0x840c0000;
2892 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2893 static const uint32_t mflr_0
= 0x7c0802a6;
2894 static const uint32_t mflr_11
= 0x7d6802a6;
2895 static const uint32_t mflr_12
= 0x7d8802a6;
2896 static const uint32_t mtctr_0
= 0x7c0903a6;
2897 static const uint32_t mtctr_11
= 0x7d6903a6;
2898 static const uint32_t mtctr_12
= 0x7d8903a6;
2899 static const uint32_t mtlr_0
= 0x7c0803a6;
2900 static const uint32_t mtlr_12
= 0x7d8803a6;
2901 static const uint32_t nop
= 0x60000000;
2902 static const uint32_t ori_0_0_0
= 0x60000000;
2903 static const uint32_t std_0_1
= 0xf8010000;
2904 static const uint32_t std_0_12
= 0xf80c0000;
2905 static const uint32_t std_2_1
= 0xf8410000;
2906 static const uint32_t stfd_0_1
= 0xd8010000;
2907 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2908 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2909 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2911 // Write out the PLT.
2913 template<int size
, bool big_endian
>
2915 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2917 if (size
== 32 && this->name_
[3] != 'I')
2919 const section_size_type offset
= this->offset();
2920 const section_size_type oview_size
2921 = convert_to_section_size_type(this->data_size());
2922 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2923 unsigned char* pov
= oview
;
2924 unsigned char* endpov
= oview
+ oview_size
;
2926 // The address of the .glink branch table
2927 const Output_data_glink
<size
, big_endian
>* glink
2928 = this->targ_
->glink_section();
2929 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2931 while (pov
< endpov
)
2933 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2938 of
->write_output_view(offset
, oview_size
, oview
);
2942 // Create the PLT section.
2944 template<int size
, bool big_endian
>
2946 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2949 if (this->plt_
== NULL
)
2951 if (this->got_
== NULL
)
2952 this->got_section(symtab
, layout
);
2954 if (this->glink_
== NULL
)
2955 make_glink_section(layout
);
2957 // Ensure that .rela.dyn always appears before .rela.plt This is
2958 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2959 // needs to include .rela.plt in its range.
2960 this->rela_dyn_section(layout
);
2962 Reloc_section
* plt_rel
= new Reloc_section(false);
2963 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2964 elfcpp::SHF_ALLOC
, plt_rel
,
2965 ORDER_DYNAMIC_PLT_RELOCS
, false);
2967 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2968 size
== 32 ? 0 : 24,
2970 layout
->add_output_section_data(".plt",
2972 ? elfcpp::SHT_PROGBITS
2973 : elfcpp::SHT_NOBITS
),
2974 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2983 // Create the IPLT section.
2985 template<int size
, bool big_endian
>
2987 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2990 if (this->iplt_
== NULL
)
2992 this->make_plt_section(symtab
, layout
);
2994 Reloc_section
* iplt_rel
= new Reloc_section(false);
2995 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2997 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2999 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
3003 // A section for huge long branch addresses, similar to plt section.
3005 template<int size
, bool big_endian
>
3006 class Output_data_brlt_powerpc
: public Output_section_data_build
3009 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3010 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3011 size
, big_endian
> Reloc_section
;
3013 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3014 Reloc_section
* brlt_rel
)
3015 : Output_section_data_build(size
== 32 ? 4 : 8),
3023 this->reset_data_size();
3024 this->rel_
->reset_data_size();
3028 finalize_brlt_sizes()
3030 this->finalize_data_size();
3031 this->rel_
->finalize_data_size();
3034 // Add a reloc for an entry in the BRLT.
3036 add_reloc(Address to
, unsigned int off
)
3037 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3039 // Update section and reloc section size.
3041 set_current_size(unsigned int num_branches
)
3043 this->reset_address_and_file_offset();
3044 this->set_current_data_size(num_branches
* 16);
3045 this->finalize_data_size();
3046 Output_section
* os
= this->output_section();
3047 os
->set_section_offsets_need_adjustment();
3048 if (this->rel_
!= NULL
)
3050 unsigned int reloc_size
3051 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3052 this->rel_
->reset_address_and_file_offset();
3053 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3054 this->rel_
->finalize_data_size();
3055 Output_section
* os
= this->rel_
->output_section();
3056 os
->set_section_offsets_need_adjustment();
3062 do_adjust_output_section(Output_section
* os
)
3067 // Write to a map file.
3069 do_print_to_mapfile(Mapfile
* mapfile
) const
3070 { mapfile
->print_output_data(this, "** BRLT"); }
3073 // Write out the BRLT data.
3075 do_write(Output_file
*);
3077 // The reloc section.
3078 Reloc_section
* rel_
;
3079 Target_powerpc
<size
, big_endian
>* targ_
;
3082 // Make the branch lookup table section.
3084 template<int size
, bool big_endian
>
3086 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3088 if (size
== 64 && this->brlt_section_
== NULL
)
3090 Reloc_section
* brlt_rel
= NULL
;
3091 bool is_pic
= parameters
->options().output_is_position_independent();
3094 // When PIC we can't fill in .branch_lt (like .plt it can be
3095 // a bss style section) but must initialise at runtime via
3096 // dynamic relocats.
3097 this->rela_dyn_section(layout
);
3098 brlt_rel
= new Reloc_section(false);
3099 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3102 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3103 if (this->plt_
&& is_pic
)
3104 this->plt_
->output_section()
3105 ->add_output_section_data(this->brlt_section_
);
3107 layout
->add_output_section_data(".branch_lt",
3108 (is_pic
? elfcpp::SHT_NOBITS
3109 : elfcpp::SHT_PROGBITS
),
3110 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3111 this->brlt_section_
,
3112 (is_pic
? ORDER_SMALL_BSS
3113 : ORDER_SMALL_DATA
),
3118 // Write out .branch_lt when non-PIC.
3120 template<int size
, bool big_endian
>
3122 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3124 if (size
== 64 && !parameters
->options().output_is_position_independent())
3126 const section_size_type offset
= this->offset();
3127 const section_size_type oview_size
3128 = convert_to_section_size_type(this->data_size());
3129 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3131 this->targ_
->write_branch_lookup_table(oview
);
3132 of
->write_output_view(offset
, oview_size
, oview
);
3136 static inline uint32_t
3142 static inline uint32_t
3148 static inline uint32_t
3151 return hi(a
+ 0x8000);
3157 static const unsigned char eh_frame_cie
[12];
3161 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3164 'z', 'R', 0, // Augmentation string.
3165 4, // Code alignment.
3166 0x80 - size
/ 8 , // Data alignment.
3168 1, // Augmentation size.
3169 (elfcpp::DW_EH_PE_pcrel
3170 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3171 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3174 // Describe __glink_PLTresolve use of LR, 64-bit version.
3175 static const unsigned char glink_eh_frame_fde_64
[] =
3177 0, 0, 0, 0, // Replaced with offset to .glink.
3178 0, 0, 0, 0, // Replaced with size of .glink.
3179 0, // Augmentation size.
3180 elfcpp::DW_CFA_advance_loc
+ 1,
3181 elfcpp::DW_CFA_register
, 65, 12,
3182 elfcpp::DW_CFA_advance_loc
+ 4,
3183 elfcpp::DW_CFA_restore_extended
, 65
3186 // Describe __glink_PLTresolve use of LR, 32-bit version.
3187 static const unsigned char glink_eh_frame_fde_32
[] =
3189 0, 0, 0, 0, // Replaced with offset to .glink.
3190 0, 0, 0, 0, // Replaced with size of .glink.
3191 0, // Augmentation size.
3192 elfcpp::DW_CFA_advance_loc
+ 2,
3193 elfcpp::DW_CFA_register
, 65, 0,
3194 elfcpp::DW_CFA_advance_loc
+ 4,
3195 elfcpp::DW_CFA_restore_extended
, 65
3198 static const unsigned char default_fde
[] =
3200 0, 0, 0, 0, // Replaced with offset to stubs.
3201 0, 0, 0, 0, // Replaced with size of stubs.
3202 0, // Augmentation size.
3203 elfcpp::DW_CFA_nop
, // Pad.
3208 template<bool big_endian
>
3210 write_insn(unsigned char* p
, uint32_t v
)
3212 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3215 // Stub_table holds information about plt and long branch stubs.
3216 // Stubs are built in an area following some input section determined
3217 // by group_sections(). This input section is converted to a relaxed
3218 // input section allowing it to be resized to accommodate the stubs
3220 template<int size
, bool big_endian
>
3221 class Stub_table
: public Output_relaxed_input_section
3224 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3225 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3227 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
3228 : Output_relaxed_input_section(NULL
, 0, 0),
3229 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3230 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
3231 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3234 // Delayed Output_relaxed_input_section init.
3236 init(const Output_section::Input_section
*, Output_section
*);
3238 // Add a plt call stub.
3240 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3246 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3251 // Find a given plt call stub.
3253 find_plt_call_entry(const Symbol
*) const;
3256 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3257 unsigned int) const;
3260 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3266 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3271 // Add a long branch stub.
3273 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
3276 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3282 this->plt_call_stubs_
.clear();
3283 this->plt_size_
= 0;
3284 this->long_branch_stubs_
.clear();
3285 this->branch_size_
= 0;
3289 set_address_and_size(const Output_section
* os
, Address off
)
3291 Address start_off
= off
;
3292 off
+= this->orig_data_size_
;
3293 Address my_size
= this->plt_size_
+ this->branch_size_
;
3295 off
= align_address(off
, this->stub_align());
3296 // Include original section size and alignment padding in size
3297 my_size
+= off
- start_off
;
3298 this->reset_address_and_file_offset();
3299 this->set_current_data_size(my_size
);
3300 this->set_address_and_file_offset(os
->address() + start_off
,
3301 os
->offset() + start_off
);
3306 stub_address() const
3308 return align_address(this->address() + this->orig_data_size_
,
3309 this->stub_align());
3315 return align_address(this->offset() + this->orig_data_size_
,
3316 this->stub_align());
3321 { return this->plt_size_
; }
3326 Output_section
* os
= this->output_section();
3327 if (os
->addralign() < this->stub_align())
3329 os
->set_addralign(this->stub_align());
3330 // FIXME: get rid of the insane checkpointing.
3331 // We can't increase alignment of the input section to which
3332 // stubs are attached; The input section may be .init which
3333 // is pasted together with other .init sections to form a
3334 // function. Aligning might insert zero padding resulting in
3335 // sigill. However we do need to increase alignment of the
3336 // output section so that the align_address() on offset in
3337 // set_address_and_size() adds the same padding as the
3338 // align_address() on address in stub_address().
3339 // What's more, we need this alignment for the layout done in
3340 // relaxation_loop_body() so that the output section starts at
3341 // a suitably aligned address.
3342 os
->checkpoint_set_addralign(this->stub_align());
3344 if (this->last_plt_size_
!= this->plt_size_
3345 || this->last_branch_size_
!= this->branch_size_
)
3347 this->last_plt_size_
= this->plt_size_
;
3348 this->last_branch_size_
= this->branch_size_
;
3354 // Add .eh_frame info for this stub section. Unlike other linker
3355 // generated .eh_frame this is added late in the link, because we
3356 // only want the .eh_frame info if this particular stub section is
3359 add_eh_frame(Layout
* layout
)
3361 if (!this->eh_frame_added_
)
3363 if (!parameters
->options().ld_generated_unwind_info())
3366 // Since we add stub .eh_frame info late, it must be placed
3367 // after all other linker generated .eh_frame info so that
3368 // merge mapping need not be updated for input sections.
3369 // There is no provision to use a different CIE to that used
3371 if (!this->targ_
->has_glink())
3374 layout
->add_eh_frame_for_plt(this,
3375 Eh_cie
<size
>::eh_frame_cie
,
3376 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3378 sizeof (default_fde
));
3379 this->eh_frame_added_
= true;
3383 Target_powerpc
<size
, big_endian
>*
3389 class Plt_stub_ent_hash
;
3390 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3391 Plt_stub_ent_hash
> Plt_stub_entries
;
3393 // Alignment of stub section.
3399 unsigned int min_align
= 32;
3400 unsigned int user_align
= 1 << parameters
->options().plt_align();
3401 return std::max(user_align
, min_align
);
3404 // Return the plt offset for the given call stub.
3406 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3408 const Symbol
* gsym
= p
->first
.sym_
;
3411 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3412 && gsym
->can_use_relative_reloc(false));
3413 return gsym
->plt_offset();
3418 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3419 unsigned int local_sym_index
= p
->first
.locsym_
;
3420 return relobj
->local_plt_offset(local_sym_index
);
3424 // Size of a given plt call stub.
3426 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3432 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3434 plt_addr
+= this->targ_
->iplt_section()->address();
3436 plt_addr
+= this->targ_
->plt_section()->address();
3437 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3438 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3439 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3440 got_addr
+= ppcobj
->toc_base_offset();
3441 Address off
= plt_addr
- got_addr
;
3442 bool static_chain
= parameters
->options().plt_static_chain();
3443 bool thread_safe
= this->targ_
->plt_thread_safe();
3444 unsigned int bytes
= (4 * 5
3447 + 4 * (ha(off
) != 0)
3448 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3449 unsigned int align
= 1 << parameters
->options().plt_align();
3451 bytes
= (bytes
+ align
- 1) & -align
;
3455 // Return long branch stub size.
3457 branch_stub_size(Address to
)
3460 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3461 if (to
- loc
+ (1 << 25) < 2 << 25)
3463 if (size
== 64 || !parameters
->options().output_is_position_independent())
3470 do_write(Output_file
*);
3472 // Plt call stub keys.
3476 Plt_stub_ent(const Symbol
* sym
)
3477 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3480 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3481 unsigned int locsym_index
)
3482 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3485 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3487 unsigned int r_type
,
3489 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3492 this->addend_
= addend
;
3493 else if (parameters
->options().output_is_position_independent()
3494 && r_type
== elfcpp::R_PPC_PLTREL24
)
3496 this->addend_
= addend
;
3497 if (this->addend_
>= 32768)
3498 this->object_
= object
;
3502 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3503 unsigned int locsym_index
,
3504 unsigned int r_type
,
3506 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3509 this->addend_
= addend
;
3510 else if (parameters
->options().output_is_position_independent()
3511 && r_type
== elfcpp::R_PPC_PLTREL24
)
3512 this->addend_
= addend
;
3515 bool operator==(const Plt_stub_ent
& that
) const
3517 return (this->sym_
== that
.sym_
3518 && this->object_
== that
.object_
3519 && this->addend_
== that
.addend_
3520 && this->locsym_
== that
.locsym_
);
3524 const Sized_relobj_file
<size
, big_endian
>* object_
;
3525 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3526 unsigned int locsym_
;
3529 class Plt_stub_ent_hash
3532 size_t operator()(const Plt_stub_ent
& ent
) const
3534 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3535 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3541 // Long branch stub keys.
3542 class Branch_stub_ent
3545 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3546 : dest_(to
), toc_base_off_(0)
3549 toc_base_off_
= obj
->toc_base_offset();
3552 bool operator==(const Branch_stub_ent
& that
) const
3554 return (this->dest_
== that
.dest_
3556 || this->toc_base_off_
== that
.toc_base_off_
));
3560 unsigned int toc_base_off_
;
3563 class Branch_stub_ent_hash
3566 size_t operator()(const Branch_stub_ent
& ent
) const
3567 { return ent
.dest_
^ ent
.toc_base_off_
; }
3570 // In a sane world this would be a global.
3571 Target_powerpc
<size
, big_endian
>* targ_
;
3572 // Map sym/object/addend to stub offset.
3573 Plt_stub_entries plt_call_stubs_
;
3574 // Map destination address to stub offset.
3575 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3576 Branch_stub_ent_hash
> Branch_stub_entries
;
3577 Branch_stub_entries long_branch_stubs_
;
3578 // size of input section
3579 section_size_type orig_data_size_
;
3581 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3582 // Whether .eh_frame info has been created for this stub section.
3583 bool eh_frame_added_
;
3586 // Make a new stub table, and record.
3588 template<int size
, bool big_endian
>
3589 Stub_table
<size
, big_endian
>*
3590 Target_powerpc
<size
, big_endian
>::new_stub_table()
3592 Stub_table
<size
, big_endian
>* stub_table
3593 = new Stub_table
<size
, big_endian
>(this);
3594 this->stub_tables_
.push_back(stub_table
);
3598 // Delayed stub table initialisation, because we create the stub table
3599 // before we know to which section it will be attached.
3601 template<int size
, bool big_endian
>
3603 Stub_table
<size
, big_endian
>::init(
3604 const Output_section::Input_section
* owner
,
3605 Output_section
* output_section
)
3607 this->set_relobj(owner
->relobj());
3608 this->set_shndx(owner
->shndx());
3609 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3610 this->set_output_section(output_section
);
3611 this->orig_data_size_
= owner
->current_data_size();
3613 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3614 new_relaxed
.push_back(this);
3615 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3618 // Add a plt call stub, if we do not already have one for this
3619 // sym/object/addend combo.
3621 template<int size
, bool big_endian
>
3623 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3624 const Sized_relobj_file
<size
, big_endian
>* object
,
3626 unsigned int r_type
,
3629 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3630 Address off
= this->plt_size_
;
3631 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3632 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3634 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3637 template<int size
, bool big_endian
>
3639 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3640 const Sized_relobj_file
<size
, big_endian
>* object
,
3641 unsigned int locsym_index
,
3642 unsigned int r_type
,
3645 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3646 Address off
= this->plt_size_
;
3647 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3648 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3650 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3653 // Find a plt call stub.
3655 template<int size
, bool big_endian
>
3656 typename Stub_table
<size
, big_endian
>::Address
3657 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3658 const Sized_relobj_file
<size
, big_endian
>* object
,
3660 unsigned int r_type
,
3661 Address addend
) const
3663 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3664 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3665 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3668 template<int size
, bool big_endian
>
3669 typename Stub_table
<size
, big_endian
>::Address
3670 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3672 Plt_stub_ent
ent(gsym
);
3673 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3674 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3677 template<int size
, bool big_endian
>
3678 typename Stub_table
<size
, big_endian
>::Address
3679 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3680 const Sized_relobj_file
<size
, big_endian
>* object
,
3681 unsigned int locsym_index
,
3682 unsigned int r_type
,
3683 Address addend
) const
3685 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3686 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3687 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3690 template<int size
, bool big_endian
>
3691 typename Stub_table
<size
, big_endian
>::Address
3692 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3693 const Sized_relobj_file
<size
, big_endian
>* object
,
3694 unsigned int locsym_index
) const
3696 Plt_stub_ent
ent(object
, locsym_index
);
3697 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3698 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3701 // Add a long branch stub if we don't already have one to given
3704 template<int size
, bool big_endian
>
3706 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3707 const Powerpc_relobj
<size
, big_endian
>* object
,
3710 Branch_stub_ent
ent(object
, to
);
3711 Address off
= this->branch_size_
;
3712 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3714 unsigned int stub_size
= this->branch_stub_size(to
);
3715 this->branch_size_
= off
+ stub_size
;
3716 if (size
== 64 && stub_size
!= 4)
3717 this->targ_
->add_branch_lookup_table(to
);
3721 // Find long branch stub.
3723 template<int size
, bool big_endian
>
3724 typename Stub_table
<size
, big_endian
>::Address
3725 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3726 const Powerpc_relobj
<size
, big_endian
>* object
,
3729 Branch_stub_ent
ent(object
, to
);
3730 typename
Branch_stub_entries::const_iterator p
3731 = this->long_branch_stubs_
.find(ent
);
3732 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3735 // A class to handle .glink.
3737 template<int size
, bool big_endian
>
3738 class Output_data_glink
: public Output_section_data
3741 static const int pltresolve_size
= 16*4;
3743 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3744 : Output_section_data(16), targ_(targ
)
3748 add_eh_frame(Layout
* layout
)
3750 if (!parameters
->options().ld_generated_unwind_info())
3754 layout
->add_eh_frame_for_plt(this,
3755 Eh_cie
<64>::eh_frame_cie
,
3756 sizeof (Eh_cie
<64>::eh_frame_cie
),
3757 glink_eh_frame_fde_64
,
3758 sizeof (glink_eh_frame_fde_64
));
3761 // 32-bit .glink can use the default since the CIE return
3762 // address reg, LR, is valid.
3763 layout
->add_eh_frame_for_plt(this,
3764 Eh_cie
<32>::eh_frame_cie
,
3765 sizeof (Eh_cie
<32>::eh_frame_cie
),
3767 sizeof (default_fde
));
3768 // Except where LR is used in a PIC __glink_PLTresolve.
3769 if (parameters
->options().output_is_position_independent())
3770 layout
->add_eh_frame_for_plt(this,
3771 Eh_cie
<32>::eh_frame_cie
,
3772 sizeof (Eh_cie
<32>::eh_frame_cie
),
3773 glink_eh_frame_fde_32
,
3774 sizeof (glink_eh_frame_fde_32
));
3779 // Write to a map file.
3781 do_print_to_mapfile(Mapfile
* mapfile
) const
3782 { mapfile
->print_output_data(this, _("** glink")); }
3786 set_final_data_size();
3790 do_write(Output_file
*);
3792 // Allows access to .got and .plt for do_write.
3793 Target_powerpc
<size
, big_endian
>* targ_
;
3796 template<int size
, bool big_endian
>
3798 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3800 unsigned int count
= this->targ_
->plt_entry_count();
3801 section_size_type total
= 0;
3807 // space for branch table
3808 total
+= 4 * (count
- 1);
3810 total
+= -total
& 15;
3811 total
+= this->pltresolve_size
;
3815 total
+= this->pltresolve_size
;
3817 // space for branch table
3820 total
+= 4 * (count
- 0x8000);
3824 this->set_data_size(total
);
3827 // Write out plt and long branch stub code.
3829 template<int size
, bool big_endian
>
3831 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3833 if (this->plt_call_stubs_
.empty()
3834 && this->long_branch_stubs_
.empty())
3837 const section_size_type start_off
= this->offset();
3838 const section_size_type off
= this->stub_offset();
3839 const section_size_type oview_size
=
3840 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3841 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3846 const Output_data_got_powerpc
<size
, big_endian
>* got
3847 = this->targ_
->got_section();
3848 Address got_os_addr
= got
->output_section()->address();
3850 if (!this->plt_call_stubs_
.empty())
3852 // The base address of the .plt section.
3853 Address plt_base
= this->targ_
->plt_section()->address();
3854 Address iplt_base
= invalid_address
;
3856 // Write out plt call stubs.
3857 typename
Plt_stub_entries::const_iterator cs
;
3858 for (cs
= this->plt_call_stubs_
.begin();
3859 cs
!= this->plt_call_stubs_
.end();
3863 Address pltoff
= this->plt_off(cs
, &is_iplt
);
3864 Address plt_addr
= pltoff
;
3867 if (iplt_base
== invalid_address
)
3868 iplt_base
= this->targ_
->iplt_section()->address();
3869 plt_addr
+= iplt_base
;
3872 plt_addr
+= plt_base
;
3873 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3874 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3875 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3876 Address off
= plt_addr
- got_addr
;
3878 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3879 gold_error(_("%s: linkage table error against `%s'"),
3880 cs
->first
.object_
->name().c_str(),
3881 cs
->first
.sym_
->demangled_name().c_str());
3883 bool static_chain
= parameters
->options().plt_static_chain();
3884 bool thread_safe
= this->targ_
->plt_thread_safe();
3885 bool use_fake_dep
= false;
3886 Address cmp_branch_off
= 0;
3889 unsigned int pltindex
3890 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3891 / this->targ_
->plt_entry_size());
3893 = (this->targ_
->glink_section()->pltresolve_size
3895 if (pltindex
> 32768)
3896 glinkoff
+= (pltindex
- 32768) * 4;
3898 = this->targ_
->glink_section()->address() + glinkoff
;
3900 = (this->stub_address() + cs
->second
+ 24
3901 + 4 * (ha(off
) != 0)
3902 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3903 + 4 * static_chain
);
3904 cmp_branch_off
= to
- from
;
3905 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3908 p
= oview
+ cs
->second
;
3911 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3912 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3913 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3914 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3916 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3919 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3922 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3923 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3925 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3927 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3931 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3932 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3933 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3935 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3938 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3941 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3942 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3945 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3946 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3948 if (thread_safe
&& !use_fake_dep
)
3950 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3951 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3952 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3955 write_insn
<big_endian
>(p
, bctr
);
3959 // Write out long branch stubs.
3960 typename
Branch_stub_entries::const_iterator bs
;
3961 for (bs
= this->long_branch_stubs_
.begin();
3962 bs
!= this->long_branch_stubs_
.end();
3965 p
= oview
+ this->plt_size_
+ bs
->second
;
3966 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3967 Address delta
= bs
->first
.dest_
- loc
;
3968 if (delta
+ (1 << 25) < 2 << 25)
3969 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3973 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3974 gold_assert(brlt_addr
!= invalid_address
);
3975 brlt_addr
+= this->targ_
->brlt_section()->address();
3976 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3977 Address brltoff
= brlt_addr
- got_addr
;
3978 if (ha(brltoff
) == 0)
3980 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3984 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3985 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3987 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3988 write_insn
<big_endian
>(p
, bctr
);
3994 if (!this->plt_call_stubs_
.empty())
3996 // The base address of the .plt section.
3997 Address plt_base
= this->targ_
->plt_section()->address();
3998 Address iplt_base
= invalid_address
;
3999 // The address of _GLOBAL_OFFSET_TABLE_.
4000 Address g_o_t
= invalid_address
;
4002 // Write out plt call stubs.
4003 typename
Plt_stub_entries::const_iterator cs
;
4004 for (cs
= this->plt_call_stubs_
.begin();
4005 cs
!= this->plt_call_stubs_
.end();
4009 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
4012 if (iplt_base
== invalid_address
)
4013 iplt_base
= this->targ_
->iplt_section()->address();
4014 plt_addr
+= iplt_base
;
4017 plt_addr
+= plt_base
;
4019 p
= oview
+ cs
->second
;
4020 if (parameters
->options().output_is_position_independent())
4023 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4024 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4025 (cs
->first
.object_
));
4026 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4028 unsigned int got2
= ppcobj
->got2_shndx();
4029 got_addr
= ppcobj
->get_output_section_offset(got2
);
4030 gold_assert(got_addr
!= invalid_address
);
4031 got_addr
+= (ppcobj
->output_section(got2
)->address()
4032 + cs
->first
.addend_
);
4036 if (g_o_t
== invalid_address
)
4038 const Output_data_got_powerpc
<size
, big_endian
>* got
4039 = this->targ_
->got_section();
4040 g_o_t
= got
->address() + got
->g_o_t();
4045 Address off
= plt_addr
- got_addr
;
4048 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4049 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4050 write_insn
<big_endian
>(p
+ 8, bctr
);
4054 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4055 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4056 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4057 write_insn
<big_endian
>(p
+ 12, bctr
);
4062 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4063 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4064 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4065 write_insn
<big_endian
>(p
+ 12, bctr
);
4070 // Write out long branch stubs.
4071 typename
Branch_stub_entries::const_iterator bs
;
4072 for (bs
= this->long_branch_stubs_
.begin();
4073 bs
!= this->long_branch_stubs_
.end();
4076 p
= oview
+ this->plt_size_
+ bs
->second
;
4077 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4078 Address delta
= bs
->first
.dest_
- loc
;
4079 if (delta
+ (1 << 25) < 2 << 25)
4080 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4081 else if (!parameters
->options().output_is_position_independent())
4083 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4084 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4085 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4086 write_insn
<big_endian
>(p
+ 12, bctr
);
4091 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4092 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4093 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4094 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4095 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4096 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4097 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4098 write_insn
<big_endian
>(p
+ 28, bctr
);
4104 // Write out .glink.
4106 template<int size
, bool big_endian
>
4108 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4110 const section_size_type off
= this->offset();
4111 const section_size_type oview_size
=
4112 convert_to_section_size_type(this->data_size());
4113 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4116 // The base address of the .plt section.
4117 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4118 Address plt_base
= this->targ_
->plt_section()->address();
4122 // Write pltresolve stub.
4124 Address after_bcl
= this->address() + 16;
4125 Address pltoff
= plt_base
- after_bcl
;
4127 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4129 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4130 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4131 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4132 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4133 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4134 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
4135 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
4136 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
4137 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
4138 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
4139 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4140 while (p
< oview
+ this->pltresolve_size
)
4141 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4143 // Write lazy link call stubs.
4145 while (p
< oview
+ oview_size
)
4149 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4153 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
4154 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4156 uint32_t branch_off
= 8 - (p
- oview
);
4157 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4163 const Output_data_got_powerpc
<size
, big_endian
>* got
4164 = this->targ_
->got_section();
4165 // The address of _GLOBAL_OFFSET_TABLE_.
4166 Address g_o_t
= got
->address() + got
->g_o_t();
4168 // Write out pltresolve branch table.
4170 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4171 unsigned char* end_p
= oview
+ the_end
;
4172 while (p
< end_p
- 8 * 4)
4173 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4175 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4177 // Write out pltresolve call stub.
4178 if (parameters
->options().output_is_position_independent())
4180 Address res0_off
= 0;
4181 Address after_bcl_off
= the_end
+ 12;
4182 Address bcl_res0
= after_bcl_off
- res0_off
;
4184 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4185 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4186 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4187 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4188 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4189 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4190 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4192 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4194 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4195 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4197 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4198 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4202 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4203 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4205 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4206 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4207 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4208 write_insn
<big_endian
>(p
+ 52, bctr
);
4209 write_insn
<big_endian
>(p
+ 56, nop
);
4210 write_insn
<big_endian
>(p
+ 60, nop
);
4214 Address res0
= this->address();
4216 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4217 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4218 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4219 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4221 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4222 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4223 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4224 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4225 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4226 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4228 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4229 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4230 write_insn
<big_endian
>(p
+ 32, bctr
);
4231 write_insn
<big_endian
>(p
+ 36, nop
);
4232 write_insn
<big_endian
>(p
+ 40, nop
);
4233 write_insn
<big_endian
>(p
+ 44, nop
);
4234 write_insn
<big_endian
>(p
+ 48, nop
);
4235 write_insn
<big_endian
>(p
+ 52, nop
);
4236 write_insn
<big_endian
>(p
+ 56, nop
);
4237 write_insn
<big_endian
>(p
+ 60, nop
);
4242 of
->write_output_view(off
, oview_size
, oview
);
4246 // A class to handle linker generated save/restore functions.
4248 template<int size
, bool big_endian
>
4249 class Output_data_save_res
: public Output_section_data_build
4252 Output_data_save_res(Symbol_table
* symtab
);
4255 // Write to a map file.
4257 do_print_to_mapfile(Mapfile
* mapfile
) const
4258 { mapfile
->print_output_data(this, _("** save/restore")); }
4261 do_write(Output_file
*);
4264 // The maximum size of save/restore contents.
4265 static const unsigned int savres_max
= 218*4;
4268 savres_define(Symbol_table
* symtab
,
4270 unsigned int lo
, unsigned int hi
,
4271 unsigned char* write_ent(unsigned char*, int),
4272 unsigned char* write_tail(unsigned char*, int));
4274 unsigned char *contents_
;
4277 template<bool big_endian
>
4278 static unsigned char*
4279 savegpr0(unsigned char* p
, int r
)
4281 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4282 write_insn
<big_endian
>(p
, insn
);
4286 template<bool big_endian
>
4287 static unsigned char*
4288 savegpr0_tail(unsigned char* p
, int r
)
4290 p
= savegpr0
<big_endian
>(p
, r
);
4291 uint32_t insn
= std_0_1
+ 16;
4292 write_insn
<big_endian
>(p
, insn
);
4294 write_insn
<big_endian
>(p
, blr
);
4298 template<bool big_endian
>
4299 static unsigned char*
4300 restgpr0(unsigned char* p
, int r
)
4302 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4303 write_insn
<big_endian
>(p
, insn
);
4307 template<bool big_endian
>
4308 static unsigned char*
4309 restgpr0_tail(unsigned char* p
, int r
)
4311 uint32_t insn
= ld_0_1
+ 16;
4312 write_insn
<big_endian
>(p
, insn
);
4314 p
= restgpr0
<big_endian
>(p
, r
);
4315 write_insn
<big_endian
>(p
, mtlr_0
);
4319 p
= restgpr0
<big_endian
>(p
, 30);
4320 p
= restgpr0
<big_endian
>(p
, 31);
4322 write_insn
<big_endian
>(p
, blr
);
4326 template<bool big_endian
>
4327 static unsigned char*
4328 savegpr1(unsigned char* p
, int r
)
4330 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4331 write_insn
<big_endian
>(p
, insn
);
4335 template<bool big_endian
>
4336 static unsigned char*
4337 savegpr1_tail(unsigned char* p
, int r
)
4339 p
= savegpr1
<big_endian
>(p
, r
);
4340 write_insn
<big_endian
>(p
, blr
);
4344 template<bool big_endian
>
4345 static unsigned char*
4346 restgpr1(unsigned char* p
, int r
)
4348 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4349 write_insn
<big_endian
>(p
, insn
);
4353 template<bool big_endian
>
4354 static unsigned char*
4355 restgpr1_tail(unsigned char* p
, int r
)
4357 p
= restgpr1
<big_endian
>(p
, r
);
4358 write_insn
<big_endian
>(p
, blr
);
4362 template<bool big_endian
>
4363 static unsigned char*
4364 savefpr(unsigned char* p
, int r
)
4366 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4367 write_insn
<big_endian
>(p
, insn
);
4371 template<bool big_endian
>
4372 static unsigned char*
4373 savefpr0_tail(unsigned char* p
, int r
)
4375 p
= savefpr
<big_endian
>(p
, r
);
4376 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4378 write_insn
<big_endian
>(p
, blr
);
4382 template<bool big_endian
>
4383 static unsigned char*
4384 restfpr(unsigned char* p
, int r
)
4386 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4387 write_insn
<big_endian
>(p
, insn
);
4391 template<bool big_endian
>
4392 static unsigned char*
4393 restfpr0_tail(unsigned char* p
, int r
)
4395 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4397 p
= restfpr
<big_endian
>(p
, r
);
4398 write_insn
<big_endian
>(p
, mtlr_0
);
4402 p
= restfpr
<big_endian
>(p
, 30);
4403 p
= restfpr
<big_endian
>(p
, 31);
4405 write_insn
<big_endian
>(p
, blr
);
4409 template<bool big_endian
>
4410 static unsigned char*
4411 savefpr1_tail(unsigned char* p
, int r
)
4413 p
= savefpr
<big_endian
>(p
, r
);
4414 write_insn
<big_endian
>(p
, blr
);
4418 template<bool big_endian
>
4419 static unsigned char*
4420 restfpr1_tail(unsigned char* p
, int r
)
4422 p
= restfpr
<big_endian
>(p
, r
);
4423 write_insn
<big_endian
>(p
, blr
);
4427 template<bool big_endian
>
4428 static unsigned char*
4429 savevr(unsigned char* p
, int r
)
4431 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4432 write_insn
<big_endian
>(p
, insn
);
4434 insn
= stvx_0_12_0
+ (r
<< 21);
4435 write_insn
<big_endian
>(p
, insn
);
4439 template<bool big_endian
>
4440 static unsigned char*
4441 savevr_tail(unsigned char* p
, int r
)
4443 p
= savevr
<big_endian
>(p
, r
);
4444 write_insn
<big_endian
>(p
, blr
);
4448 template<bool big_endian
>
4449 static unsigned char*
4450 restvr(unsigned char* p
, int r
)
4452 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4453 write_insn
<big_endian
>(p
, insn
);
4455 insn
= lvx_0_12_0
+ (r
<< 21);
4456 write_insn
<big_endian
>(p
, insn
);
4460 template<bool big_endian
>
4461 static unsigned char*
4462 restvr_tail(unsigned char* p
, int r
)
4464 p
= restvr
<big_endian
>(p
, r
);
4465 write_insn
<big_endian
>(p
, blr
);
4470 template<int size
, bool big_endian
>
4471 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
4472 Symbol_table
* symtab
)
4473 : Output_section_data_build(4),
4476 this->savres_define(symtab
,
4477 "_savegpr0_", 14, 31,
4478 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
4479 this->savres_define(symtab
,
4480 "_restgpr0_", 14, 29,
4481 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4482 this->savres_define(symtab
,
4483 "_restgpr0_", 30, 31,
4484 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4485 this->savres_define(symtab
,
4486 "_savegpr1_", 14, 31,
4487 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
4488 this->savres_define(symtab
,
4489 "_restgpr1_", 14, 31,
4490 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4491 this->savres_define(symtab
,
4492 "_savefpr_", 14, 31,
4493 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4494 this->savres_define(symtab
,
4495 "_restfpr_", 14, 29,
4496 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4497 this->savres_define(symtab
,
4498 "_restfpr_", 30, 31,
4499 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4500 this->savres_define(symtab
,
4502 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4503 this->savres_define(symtab
,
4505 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4506 this->savres_define(symtab
,
4508 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4509 this->savres_define(symtab
,
4511 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4514 template<int size
, bool big_endian
>
4516 Output_data_save_res
<size
, big_endian
>::savres_define(
4517 Symbol_table
* symtab
,
4519 unsigned int lo
, unsigned int hi
,
4520 unsigned char* write_ent(unsigned char*, int),
4521 unsigned char* write_tail(unsigned char*, int))
4523 size_t len
= strlen(name
);
4524 bool writing
= false;
4527 memcpy(sym
, name
, len
);
4530 for (unsigned int i
= lo
; i
<= hi
; i
++)
4532 sym
[len
+ 0] = i
/ 10 + '0';
4533 sym
[len
+ 1] = i
% 10 + '0';
4534 Symbol
* gsym
= symtab
->lookup(sym
);
4535 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4536 writing
= writing
|| refd
;
4539 if (this->contents_
== NULL
)
4540 this->contents_
= new unsigned char[this->savres_max
];
4542 section_size_type value
= this->current_data_size();
4543 unsigned char* p
= this->contents_
+ value
;
4545 p
= write_ent(p
, i
);
4547 p
= write_tail(p
, i
);
4548 section_size_type cur_size
= p
- this->contents_
;
4549 this->set_current_data_size(cur_size
);
4551 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4552 this, value
, cur_size
- value
,
4553 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4554 elfcpp::STV_HIDDEN
, 0, false, false);
4559 // Write out save/restore.
4561 template<int size
, bool big_endian
>
4563 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4565 const section_size_type off
= this->offset();
4566 const section_size_type oview_size
=
4567 convert_to_section_size_type(this->data_size());
4568 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4569 memcpy(oview
, this->contents_
, oview_size
);
4570 of
->write_output_view(off
, oview_size
, oview
);
4574 // Create the glink section.
4576 template<int size
, bool big_endian
>
4578 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4580 if (this->glink_
== NULL
)
4582 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4583 this->glink_
->add_eh_frame(layout
);
4584 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4585 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4586 this->glink_
, ORDER_TEXT
, false);
4590 // Create a PLT entry for a global symbol.
4592 template<int size
, bool big_endian
>
4594 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4598 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4599 && gsym
->can_use_relative_reloc(false))
4601 if (this->iplt_
== NULL
)
4602 this->make_iplt_section(symtab
, layout
);
4603 this->iplt_
->add_ifunc_entry(gsym
);
4607 if (this->plt_
== NULL
)
4608 this->make_plt_section(symtab
, layout
);
4609 this->plt_
->add_entry(gsym
);
4613 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4615 template<int size
, bool big_endian
>
4617 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4618 Symbol_table
* symtab
,
4620 Sized_relobj_file
<size
, big_endian
>* relobj
,
4623 if (this->iplt_
== NULL
)
4624 this->make_iplt_section(symtab
, layout
);
4625 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4628 // Return the number of entries in the PLT.
4630 template<int size
, bool big_endian
>
4632 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4634 if (this->plt_
== NULL
)
4636 return this->plt_
->entry_count();
4639 // Return the offset of the first non-reserved PLT entry.
4641 template<int size
, bool big_endian
>
4643 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4645 return this->plt_
->first_plt_entry_offset();
4648 // Return the size of each PLT entry.
4650 template<int size
, bool big_endian
>
4652 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4654 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4657 // Create a GOT entry for local dynamic __tls_get_addr calls.
4659 template<int size
, bool big_endian
>
4661 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4662 Symbol_table
* symtab
,
4664 Sized_relobj_file
<size
, big_endian
>* object
)
4666 if (this->tlsld_got_offset_
== -1U)
4668 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4669 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4670 Output_data_got_powerpc
<size
, big_endian
>* got
4671 = this->got_section(symtab
, layout
);
4672 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4673 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4675 this->tlsld_got_offset_
= got_offset
;
4677 return this->tlsld_got_offset_
;
4680 // Get the Reference_flags for a particular relocation.
4682 template<int size
, bool big_endian
>
4684 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4688 case elfcpp::R_POWERPC_NONE
:
4689 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4690 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4691 case elfcpp::R_PPC64_TOC
:
4692 // No symbol reference.
4695 case elfcpp::R_PPC64_ADDR64
:
4696 case elfcpp::R_PPC64_UADDR64
:
4697 case elfcpp::R_POWERPC_ADDR32
:
4698 case elfcpp::R_POWERPC_UADDR32
:
4699 case elfcpp::R_POWERPC_ADDR16
:
4700 case elfcpp::R_POWERPC_UADDR16
:
4701 case elfcpp::R_POWERPC_ADDR16_LO
:
4702 case elfcpp::R_POWERPC_ADDR16_HI
:
4703 case elfcpp::R_POWERPC_ADDR16_HA
:
4704 return Symbol::ABSOLUTE_REF
;
4706 case elfcpp::R_POWERPC_ADDR24
:
4707 case elfcpp::R_POWERPC_ADDR14
:
4708 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4709 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4710 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4712 case elfcpp::R_PPC64_REL64
:
4713 case elfcpp::R_POWERPC_REL32
:
4714 case elfcpp::R_PPC_LOCAL24PC
:
4715 case elfcpp::R_POWERPC_REL16
:
4716 case elfcpp::R_POWERPC_REL16_LO
:
4717 case elfcpp::R_POWERPC_REL16_HI
:
4718 case elfcpp::R_POWERPC_REL16_HA
:
4719 return Symbol::RELATIVE_REF
;
4721 case elfcpp::R_POWERPC_REL24
:
4722 case elfcpp::R_PPC_PLTREL24
:
4723 case elfcpp::R_POWERPC_REL14
:
4724 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4725 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4726 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4728 case elfcpp::R_POWERPC_GOT16
:
4729 case elfcpp::R_POWERPC_GOT16_LO
:
4730 case elfcpp::R_POWERPC_GOT16_HI
:
4731 case elfcpp::R_POWERPC_GOT16_HA
:
4732 case elfcpp::R_PPC64_GOT16_DS
:
4733 case elfcpp::R_PPC64_GOT16_LO_DS
:
4734 case elfcpp::R_PPC64_TOC16
:
4735 case elfcpp::R_PPC64_TOC16_LO
:
4736 case elfcpp::R_PPC64_TOC16_HI
:
4737 case elfcpp::R_PPC64_TOC16_HA
:
4738 case elfcpp::R_PPC64_TOC16_DS
:
4739 case elfcpp::R_PPC64_TOC16_LO_DS
:
4741 return Symbol::ABSOLUTE_REF
;
4743 case elfcpp::R_POWERPC_GOT_TPREL16
:
4744 case elfcpp::R_POWERPC_TLS
:
4745 return Symbol::TLS_REF
;
4747 case elfcpp::R_POWERPC_COPY
:
4748 case elfcpp::R_POWERPC_GLOB_DAT
:
4749 case elfcpp::R_POWERPC_JMP_SLOT
:
4750 case elfcpp::R_POWERPC_RELATIVE
:
4751 case elfcpp::R_POWERPC_DTPMOD
:
4753 // Not expected. We will give an error later.
4758 // Report an unsupported relocation against a local symbol.
4760 template<int size
, bool big_endian
>
4762 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4763 Sized_relobj_file
<size
, big_endian
>* object
,
4764 unsigned int r_type
)
4766 gold_error(_("%s: unsupported reloc %u against local symbol"),
4767 object
->name().c_str(), r_type
);
4770 // We are about to emit a dynamic relocation of type R_TYPE. If the
4771 // dynamic linker does not support it, issue an error.
4773 template<int size
, bool big_endian
>
4775 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4776 unsigned int r_type
)
4778 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4780 // These are the relocation types supported by glibc for both 32-bit
4781 // and 64-bit powerpc.
4784 case elfcpp::R_POWERPC_NONE
:
4785 case elfcpp::R_POWERPC_RELATIVE
:
4786 case elfcpp::R_POWERPC_GLOB_DAT
:
4787 case elfcpp::R_POWERPC_DTPMOD
:
4788 case elfcpp::R_POWERPC_DTPREL
:
4789 case elfcpp::R_POWERPC_TPREL
:
4790 case elfcpp::R_POWERPC_JMP_SLOT
:
4791 case elfcpp::R_POWERPC_COPY
:
4792 case elfcpp::R_POWERPC_IRELATIVE
:
4793 case elfcpp::R_POWERPC_ADDR32
:
4794 case elfcpp::R_POWERPC_UADDR32
:
4795 case elfcpp::R_POWERPC_ADDR24
:
4796 case elfcpp::R_POWERPC_ADDR16
:
4797 case elfcpp::R_POWERPC_UADDR16
:
4798 case elfcpp::R_POWERPC_ADDR16_LO
:
4799 case elfcpp::R_POWERPC_ADDR16_HI
:
4800 case elfcpp::R_POWERPC_ADDR16_HA
:
4801 case elfcpp::R_POWERPC_ADDR14
:
4802 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4803 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4804 case elfcpp::R_POWERPC_REL32
:
4805 case elfcpp::R_POWERPC_REL24
:
4806 case elfcpp::R_POWERPC_TPREL16
:
4807 case elfcpp::R_POWERPC_TPREL16_LO
:
4808 case elfcpp::R_POWERPC_TPREL16_HI
:
4809 case elfcpp::R_POWERPC_TPREL16_HA
:
4820 // These are the relocation types supported only on 64-bit.
4821 case elfcpp::R_PPC64_ADDR64
:
4822 case elfcpp::R_PPC64_UADDR64
:
4823 case elfcpp::R_PPC64_JMP_IREL
:
4824 case elfcpp::R_PPC64_ADDR16_DS
:
4825 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4826 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4827 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4828 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4829 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4830 case elfcpp::R_PPC64_REL64
:
4831 case elfcpp::R_POWERPC_ADDR30
:
4832 case elfcpp::R_PPC64_TPREL16_DS
:
4833 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4834 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4835 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4836 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4837 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4848 // These are the relocation types supported only on 32-bit.
4849 // ??? glibc ld.so doesn't need to support these.
4850 case elfcpp::R_POWERPC_DTPREL16
:
4851 case elfcpp::R_POWERPC_DTPREL16_LO
:
4852 case elfcpp::R_POWERPC_DTPREL16_HI
:
4853 case elfcpp::R_POWERPC_DTPREL16_HA
:
4861 // This prevents us from issuing more than one error per reloc
4862 // section. But we can still wind up issuing more than one
4863 // error per object file.
4864 if (this->issued_non_pic_error_
)
4866 gold_assert(parameters
->options().output_is_position_independent());
4867 object
->error(_("requires unsupported dynamic reloc; "
4868 "recompile with -fPIC"));
4869 this->issued_non_pic_error_
= true;
4873 // Return whether we need to make a PLT entry for a relocation of the
4874 // given type against a STT_GNU_IFUNC symbol.
4876 template<int size
, bool big_endian
>
4878 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4879 Sized_relobj_file
<size
, big_endian
>* object
,
4880 unsigned int r_type
,
4883 // In non-pic code any reference will resolve to the plt call stub
4884 // for the ifunc symbol.
4885 if (size
== 32 && !parameters
->options().output_is_position_independent())
4890 // Word size refs from data sections are OK, but don't need a PLT entry.
4891 case elfcpp::R_POWERPC_ADDR32
:
4892 case elfcpp::R_POWERPC_UADDR32
:
4897 case elfcpp::R_PPC64_ADDR64
:
4898 case elfcpp::R_PPC64_UADDR64
:
4903 // GOT refs are good, but also don't need a PLT entry.
4904 case elfcpp::R_POWERPC_GOT16
:
4905 case elfcpp::R_POWERPC_GOT16_LO
:
4906 case elfcpp::R_POWERPC_GOT16_HI
:
4907 case elfcpp::R_POWERPC_GOT16_HA
:
4908 case elfcpp::R_PPC64_GOT16_DS
:
4909 case elfcpp::R_PPC64_GOT16_LO_DS
:
4912 // Function calls are good, and these do need a PLT entry.
4913 case elfcpp::R_POWERPC_ADDR24
:
4914 case elfcpp::R_POWERPC_ADDR14
:
4915 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4916 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4917 case elfcpp::R_POWERPC_REL24
:
4918 case elfcpp::R_PPC_PLTREL24
:
4919 case elfcpp::R_POWERPC_REL14
:
4920 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4921 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4928 // Anything else is a problem.
4929 // If we are building a static executable, the libc startup function
4930 // responsible for applying indirect function relocations is going
4931 // to complain about the reloc type.
4932 // If we are building a dynamic executable, we will have a text
4933 // relocation. The dynamic loader will set the text segment
4934 // writable and non-executable to apply text relocations. So we'll
4935 // segfault when trying to run the indirection function to resolve
4938 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4939 object
->name().c_str(), r_type
);
4943 // Scan a relocation for a local symbol.
4945 template<int size
, bool big_endian
>
4947 Target_powerpc
<size
, big_endian
>::Scan::local(
4948 Symbol_table
* symtab
,
4950 Target_powerpc
<size
, big_endian
>* target
,
4951 Sized_relobj_file
<size
, big_endian
>* object
,
4952 unsigned int data_shndx
,
4953 Output_section
* output_section
,
4954 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4955 unsigned int r_type
,
4956 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4959 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
4961 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4962 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4964 this->expect_tls_get_addr_call();
4965 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4966 if (tls_type
!= tls::TLSOPT_NONE
)
4967 this->skip_next_tls_get_addr_call();
4969 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4970 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4972 this->expect_tls_get_addr_call();
4973 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4974 if (tls_type
!= tls::TLSOPT_NONE
)
4975 this->skip_next_tls_get_addr_call();
4978 Powerpc_relobj
<size
, big_endian
>* ppc_object
4979 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4984 && data_shndx
== ppc_object
->opd_shndx()
4985 && r_type
== elfcpp::R_PPC64_ADDR64
)
4986 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4990 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4991 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4992 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
4994 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4995 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4996 r_type
, r_sym
, reloc
.get_r_addend());
4997 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
5002 case elfcpp::R_POWERPC_NONE
:
5003 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5004 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5005 case elfcpp::R_PPC64_TOCSAVE
:
5006 case elfcpp::R_PPC_EMB_MRKREF
:
5007 case elfcpp::R_POWERPC_TLS
:
5010 case elfcpp::R_PPC64_TOC
:
5012 Output_data_got_powerpc
<size
, big_endian
>* got
5013 = target
->got_section(symtab
, layout
);
5014 if (parameters
->options().output_is_position_independent())
5016 Address off
= reloc
.get_r_offset();
5018 && data_shndx
== ppc_object
->opd_shndx()
5019 && ppc_object
->get_opd_discard(off
- 8))
5022 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5023 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5024 rela_dyn
->add_output_section_relative(got
->output_section(),
5025 elfcpp::R_POWERPC_RELATIVE
,
5027 object
, data_shndx
, off
,
5028 symobj
->toc_base_offset());
5033 case elfcpp::R_PPC64_ADDR64
:
5034 case elfcpp::R_PPC64_UADDR64
:
5035 case elfcpp::R_POWERPC_ADDR32
:
5036 case elfcpp::R_POWERPC_UADDR32
:
5037 case elfcpp::R_POWERPC_ADDR24
:
5038 case elfcpp::R_POWERPC_ADDR16
:
5039 case elfcpp::R_POWERPC_ADDR16_LO
:
5040 case elfcpp::R_POWERPC_ADDR16_HI
:
5041 case elfcpp::R_POWERPC_ADDR16_HA
:
5042 case elfcpp::R_POWERPC_UADDR16
:
5043 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5044 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5045 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5046 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5047 case elfcpp::R_PPC64_ADDR16_DS
:
5048 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5049 case elfcpp::R_POWERPC_ADDR14
:
5050 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5051 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5052 // If building a shared library (or a position-independent
5053 // executable), we need to create a dynamic relocation for
5055 if (parameters
->options().output_is_position_independent()
5056 || (size
== 64 && is_ifunc
))
5058 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5060 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5061 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5063 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5064 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5065 : elfcpp::R_POWERPC_RELATIVE
);
5066 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5067 output_section
, data_shndx
,
5068 reloc
.get_r_offset(),
5069 reloc
.get_r_addend(), false);
5073 check_non_pic(object
, r_type
);
5074 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5075 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5076 data_shndx
, reloc
.get_r_offset(),
5077 reloc
.get_r_addend());
5082 case elfcpp::R_POWERPC_REL24
:
5083 case elfcpp::R_PPC_PLTREL24
:
5084 case elfcpp::R_PPC_LOCAL24PC
:
5085 case elfcpp::R_POWERPC_REL14
:
5086 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5087 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5089 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5090 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5091 reloc
.get_r_addend());
5094 case elfcpp::R_PPC64_REL64
:
5095 case elfcpp::R_POWERPC_REL32
:
5096 case elfcpp::R_POWERPC_REL16
:
5097 case elfcpp::R_POWERPC_REL16_LO
:
5098 case elfcpp::R_POWERPC_REL16_HI
:
5099 case elfcpp::R_POWERPC_REL16_HA
:
5100 case elfcpp::R_POWERPC_SECTOFF
:
5101 case elfcpp::R_POWERPC_TPREL16
:
5102 case elfcpp::R_POWERPC_DTPREL16
:
5103 case elfcpp::R_POWERPC_SECTOFF_LO
:
5104 case elfcpp::R_POWERPC_TPREL16_LO
:
5105 case elfcpp::R_POWERPC_DTPREL16_LO
:
5106 case elfcpp::R_POWERPC_SECTOFF_HI
:
5107 case elfcpp::R_POWERPC_TPREL16_HI
:
5108 case elfcpp::R_POWERPC_DTPREL16_HI
:
5109 case elfcpp::R_POWERPC_SECTOFF_HA
:
5110 case elfcpp::R_POWERPC_TPREL16_HA
:
5111 case elfcpp::R_POWERPC_DTPREL16_HA
:
5112 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5113 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5114 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5115 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5116 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5117 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5118 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5119 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5120 case elfcpp::R_PPC64_TPREL16_DS
:
5121 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5122 case elfcpp::R_PPC64_DTPREL16_DS
:
5123 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5124 case elfcpp::R_PPC64_SECTOFF_DS
:
5125 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5126 case elfcpp::R_PPC64_TLSGD
:
5127 case elfcpp::R_PPC64_TLSLD
:
5130 case elfcpp::R_POWERPC_GOT16
:
5131 case elfcpp::R_POWERPC_GOT16_LO
:
5132 case elfcpp::R_POWERPC_GOT16_HI
:
5133 case elfcpp::R_POWERPC_GOT16_HA
:
5134 case elfcpp::R_PPC64_GOT16_DS
:
5135 case elfcpp::R_PPC64_GOT16_LO_DS
:
5137 // The symbol requires a GOT entry.
5138 Output_data_got_powerpc
<size
, big_endian
>* got
5139 = target
->got_section(symtab
, layout
);
5140 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5142 if (!parameters
->options().output_is_position_independent())
5144 if (size
== 32 && is_ifunc
)
5145 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5147 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5149 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5151 // If we are generating a shared object or a pie, this
5152 // symbol's GOT entry will be set by a dynamic relocation.
5154 off
= got
->add_constant(0);
5155 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5157 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5159 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5160 : elfcpp::R_POWERPC_RELATIVE
);
5161 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5162 got
, off
, 0, false);
5167 case elfcpp::R_PPC64_TOC16
:
5168 case elfcpp::R_PPC64_TOC16_LO
:
5169 case elfcpp::R_PPC64_TOC16_HI
:
5170 case elfcpp::R_PPC64_TOC16_HA
:
5171 case elfcpp::R_PPC64_TOC16_DS
:
5172 case elfcpp::R_PPC64_TOC16_LO_DS
:
5173 // We need a GOT section.
5174 target
->got_section(symtab
, layout
);
5177 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5178 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5179 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5180 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5182 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5183 if (tls_type
== tls::TLSOPT_NONE
)
5185 Output_data_got_powerpc
<size
, big_endian
>* got
5186 = target
->got_section(symtab
, layout
);
5187 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5188 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5189 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5190 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5192 else if (tls_type
== tls::TLSOPT_TO_LE
)
5194 // no GOT relocs needed for Local Exec.
5201 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5202 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5203 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5204 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5206 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5207 if (tls_type
== tls::TLSOPT_NONE
)
5208 target
->tlsld_got_offset(symtab
, layout
, object
);
5209 else if (tls_type
== tls::TLSOPT_TO_LE
)
5211 // no GOT relocs needed for Local Exec.
5212 if (parameters
->options().emit_relocs())
5214 Output_section
* os
= layout
->tls_segment()->first_section();
5215 gold_assert(os
!= NULL
);
5216 os
->set_needs_symtab_index();
5224 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5225 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5226 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5227 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5229 Output_data_got_powerpc
<size
, big_endian
>* got
5230 = target
->got_section(symtab
, layout
);
5231 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5232 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5236 case elfcpp::R_POWERPC_GOT_TPREL16
:
5237 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5238 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5239 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5241 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5242 if (tls_type
== tls::TLSOPT_NONE
)
5244 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5245 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5247 Output_data_got_powerpc
<size
, big_endian
>* got
5248 = target
->got_section(symtab
, layout
);
5249 unsigned int off
= got
->add_constant(0);
5250 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5252 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5253 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5254 elfcpp::R_POWERPC_TPREL
,
5258 else if (tls_type
== tls::TLSOPT_TO_LE
)
5260 // no GOT relocs needed for Local Exec.
5268 unsupported_reloc_local(object
, r_type
);
5274 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5275 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5276 case elfcpp::R_POWERPC_GOT_TPREL16
:
5277 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5278 case elfcpp::R_POWERPC_GOT16
:
5279 case elfcpp::R_PPC64_GOT16_DS
:
5280 case elfcpp::R_PPC64_TOC16
:
5281 case elfcpp::R_PPC64_TOC16_DS
:
5282 ppc_object
->set_has_small_toc_reloc();
5288 // Report an unsupported relocation against a global symbol.
5290 template<int size
, bool big_endian
>
5292 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5293 Sized_relobj_file
<size
, big_endian
>* object
,
5294 unsigned int r_type
,
5297 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5298 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5301 // Scan a relocation for a global symbol.
5303 template<int size
, bool big_endian
>
5305 Target_powerpc
<size
, big_endian
>::Scan::global(
5306 Symbol_table
* symtab
,
5308 Target_powerpc
<size
, big_endian
>* target
,
5309 Sized_relobj_file
<size
, big_endian
>* object
,
5310 unsigned int data_shndx
,
5311 Output_section
* output_section
,
5312 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5313 unsigned int r_type
,
5316 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5319 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5320 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5322 this->expect_tls_get_addr_call();
5323 const bool final
= gsym
->final_value_is_known();
5324 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5325 if (tls_type
!= tls::TLSOPT_NONE
)
5326 this->skip_next_tls_get_addr_call();
5328 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5329 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5331 this->expect_tls_get_addr_call();
5332 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5333 if (tls_type
!= tls::TLSOPT_NONE
)
5334 this->skip_next_tls_get_addr_call();
5337 Powerpc_relobj
<size
, big_endian
>* ppc_object
5338 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5340 // A STT_GNU_IFUNC symbol may require a PLT entry.
5341 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5342 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
5344 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5345 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5346 reloc
.get_r_addend());
5347 target
->make_plt_entry(symtab
, layout
, gsym
);
5352 case elfcpp::R_POWERPC_NONE
:
5353 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5354 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5355 case elfcpp::R_PPC_LOCAL24PC
:
5356 case elfcpp::R_PPC_EMB_MRKREF
:
5357 case elfcpp::R_POWERPC_TLS
:
5360 case elfcpp::R_PPC64_TOC
:
5362 Output_data_got_powerpc
<size
, big_endian
>* got
5363 = target
->got_section(symtab
, layout
);
5364 if (parameters
->options().output_is_position_independent())
5366 Address off
= reloc
.get_r_offset();
5368 && data_shndx
== ppc_object
->opd_shndx()
5369 && ppc_object
->get_opd_discard(off
- 8))
5372 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5373 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5374 if (data_shndx
!= ppc_object
->opd_shndx())
5375 symobj
= static_cast
5376 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5377 rela_dyn
->add_output_section_relative(got
->output_section(),
5378 elfcpp::R_POWERPC_RELATIVE
,
5380 object
, data_shndx
, off
,
5381 symobj
->toc_base_offset());
5386 case elfcpp::R_PPC64_ADDR64
:
5388 && data_shndx
== ppc_object
->opd_shndx()
5389 && (gsym
->is_defined_in_discarded_section()
5390 || gsym
->object() != object
))
5392 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5396 case elfcpp::R_PPC64_UADDR64
:
5397 case elfcpp::R_POWERPC_ADDR32
:
5398 case elfcpp::R_POWERPC_UADDR32
:
5399 case elfcpp::R_POWERPC_ADDR24
:
5400 case elfcpp::R_POWERPC_ADDR16
:
5401 case elfcpp::R_POWERPC_ADDR16_LO
:
5402 case elfcpp::R_POWERPC_ADDR16_HI
:
5403 case elfcpp::R_POWERPC_ADDR16_HA
:
5404 case elfcpp::R_POWERPC_UADDR16
:
5405 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5406 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5407 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5408 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5409 case elfcpp::R_PPC64_ADDR16_DS
:
5410 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5411 case elfcpp::R_POWERPC_ADDR14
:
5412 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5413 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5415 // Make a PLT entry if necessary.
5416 if (gsym
->needs_plt_entry())
5420 target
->push_branch(ppc_object
, data_shndx
,
5421 reloc
.get_r_offset(), r_type
,
5422 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5423 reloc
.get_r_addend());
5424 target
->make_plt_entry(symtab
, layout
, gsym
);
5426 // Since this is not a PC-relative relocation, we may be
5427 // taking the address of a function. In that case we need to
5428 // set the entry in the dynamic symbol table to the address of
5429 // the PLT call stub.
5431 && gsym
->is_from_dynobj()
5432 && !parameters
->options().output_is_position_independent())
5433 gsym
->set_needs_dynsym_value();
5435 // Make a dynamic relocation if necessary.
5436 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5437 || (size
== 64 && is_ifunc
))
5439 if (gsym
->may_need_copy_reloc())
5441 target
->copy_reloc(symtab
, layout
, object
,
5442 data_shndx
, output_section
, gsym
, reloc
);
5444 else if ((size
== 32
5445 && r_type
== elfcpp::R_POWERPC_ADDR32
5446 && gsym
->can_use_relative_reloc(false)
5447 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
5448 && parameters
->options().shared()))
5450 && r_type
== elfcpp::R_PPC64_ADDR64
5451 && (gsym
->can_use_relative_reloc(false)
5452 || data_shndx
== ppc_object
->opd_shndx())))
5454 Reloc_section
* rela_dyn
5455 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5456 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5457 : elfcpp::R_POWERPC_RELATIVE
);
5458 rela_dyn
->add_symbolless_global_addend(
5459 gsym
, dynrel
, output_section
, object
, data_shndx
,
5460 reloc
.get_r_offset(), reloc
.get_r_addend());
5464 Reloc_section
* rela_dyn
5465 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5466 check_non_pic(object
, r_type
);
5467 rela_dyn
->add_global(gsym
, r_type
, output_section
,
5469 reloc
.get_r_offset(),
5470 reloc
.get_r_addend());
5476 case elfcpp::R_PPC_PLTREL24
:
5477 case elfcpp::R_POWERPC_REL24
:
5480 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5482 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5483 reloc
.get_r_addend());
5484 if (gsym
->needs_plt_entry()
5485 || (!gsym
->final_value_is_known()
5486 && (gsym
->is_undefined()
5487 || gsym
->is_from_dynobj()
5488 || gsym
->is_preemptible())))
5489 target
->make_plt_entry(symtab
, layout
, gsym
);
5493 case elfcpp::R_PPC64_REL64
:
5494 case elfcpp::R_POWERPC_REL32
:
5495 // Make a dynamic relocation if necessary.
5496 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
5498 if (gsym
->may_need_copy_reloc())
5500 target
->copy_reloc(symtab
, layout
, object
,
5501 data_shndx
, output_section
, gsym
,
5506 Reloc_section
* rela_dyn
5507 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5508 check_non_pic(object
, r_type
);
5509 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5510 data_shndx
, reloc
.get_r_offset(),
5511 reloc
.get_r_addend());
5516 case elfcpp::R_POWERPC_REL14
:
5517 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5518 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5520 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5521 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5522 reloc
.get_r_addend());
5525 case elfcpp::R_POWERPC_REL16
:
5526 case elfcpp::R_POWERPC_REL16_LO
:
5527 case elfcpp::R_POWERPC_REL16_HI
:
5528 case elfcpp::R_POWERPC_REL16_HA
:
5529 case elfcpp::R_POWERPC_SECTOFF
:
5530 case elfcpp::R_POWERPC_TPREL16
:
5531 case elfcpp::R_POWERPC_DTPREL16
:
5532 case elfcpp::R_POWERPC_SECTOFF_LO
:
5533 case elfcpp::R_POWERPC_TPREL16_LO
:
5534 case elfcpp::R_POWERPC_DTPREL16_LO
:
5535 case elfcpp::R_POWERPC_SECTOFF_HI
:
5536 case elfcpp::R_POWERPC_TPREL16_HI
:
5537 case elfcpp::R_POWERPC_DTPREL16_HI
:
5538 case elfcpp::R_POWERPC_SECTOFF_HA
:
5539 case elfcpp::R_POWERPC_TPREL16_HA
:
5540 case elfcpp::R_POWERPC_DTPREL16_HA
:
5541 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5542 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5543 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5544 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5545 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5546 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5547 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5548 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5549 case elfcpp::R_PPC64_TPREL16_DS
:
5550 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5551 case elfcpp::R_PPC64_DTPREL16_DS
:
5552 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5553 case elfcpp::R_PPC64_SECTOFF_DS
:
5554 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5555 case elfcpp::R_PPC64_TLSGD
:
5556 case elfcpp::R_PPC64_TLSLD
:
5559 case elfcpp::R_POWERPC_GOT16
:
5560 case elfcpp::R_POWERPC_GOT16_LO
:
5561 case elfcpp::R_POWERPC_GOT16_HI
:
5562 case elfcpp::R_POWERPC_GOT16_HA
:
5563 case elfcpp::R_PPC64_GOT16_DS
:
5564 case elfcpp::R_PPC64_GOT16_LO_DS
:
5566 // The symbol requires a GOT entry.
5567 Output_data_got_powerpc
<size
, big_endian
>* got
;
5569 got
= target
->got_section(symtab
, layout
);
5570 if (gsym
->final_value_is_known())
5572 if (size
== 32 && is_ifunc
)
5573 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5575 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5577 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5579 // If we are generating a shared object or a pie, this
5580 // symbol's GOT entry will be set by a dynamic relocation.
5581 unsigned int off
= got
->add_constant(0);
5582 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5584 Reloc_section
* rela_dyn
5585 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5587 if (gsym
->can_use_relative_reloc(false)
5589 && gsym
->visibility() == elfcpp::STV_PROTECTED
5590 && parameters
->options().shared()))
5592 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5593 : elfcpp::R_POWERPC_RELATIVE
);
5594 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5598 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5599 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5605 case elfcpp::R_PPC64_TOC16
:
5606 case elfcpp::R_PPC64_TOC16_LO
:
5607 case elfcpp::R_PPC64_TOC16_HI
:
5608 case elfcpp::R_PPC64_TOC16_HA
:
5609 case elfcpp::R_PPC64_TOC16_DS
:
5610 case elfcpp::R_PPC64_TOC16_LO_DS
:
5611 // We need a GOT section.
5612 target
->got_section(symtab
, layout
);
5615 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5616 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5617 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5618 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5620 const bool final
= gsym
->final_value_is_known();
5621 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5622 if (tls_type
== tls::TLSOPT_NONE
)
5624 Output_data_got_powerpc
<size
, big_endian
>* got
5625 = target
->got_section(symtab
, layout
);
5626 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5627 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
5628 elfcpp::R_POWERPC_DTPMOD
,
5629 elfcpp::R_POWERPC_DTPREL
);
5631 else if (tls_type
== tls::TLSOPT_TO_IE
)
5633 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5635 Output_data_got_powerpc
<size
, big_endian
>* got
5636 = target
->got_section(symtab
, layout
);
5637 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5638 if (gsym
->is_undefined()
5639 || gsym
->is_from_dynobj())
5641 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5642 elfcpp::R_POWERPC_TPREL
);
5646 unsigned int off
= got
->add_constant(0);
5647 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5648 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5649 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5654 else if (tls_type
== tls::TLSOPT_TO_LE
)
5656 // no GOT relocs needed for Local Exec.
5663 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5664 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5665 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5666 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5668 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5669 if (tls_type
== tls::TLSOPT_NONE
)
5670 target
->tlsld_got_offset(symtab
, layout
, object
);
5671 else if (tls_type
== tls::TLSOPT_TO_LE
)
5673 // no GOT relocs needed for Local Exec.
5674 if (parameters
->options().emit_relocs())
5676 Output_section
* os
= layout
->tls_segment()->first_section();
5677 gold_assert(os
!= NULL
);
5678 os
->set_needs_symtab_index();
5686 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5687 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5688 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5689 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5691 Output_data_got_powerpc
<size
, big_endian
>* got
5692 = target
->got_section(symtab
, layout
);
5693 if (!gsym
->final_value_is_known()
5694 && (gsym
->is_from_dynobj()
5695 || gsym
->is_undefined()
5696 || gsym
->is_preemptible()))
5697 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5698 target
->rela_dyn_section(layout
),
5699 elfcpp::R_POWERPC_DTPREL
);
5701 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5705 case elfcpp::R_POWERPC_GOT_TPREL16
:
5706 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5707 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5708 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5710 const bool final
= gsym
->final_value_is_known();
5711 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5712 if (tls_type
== tls::TLSOPT_NONE
)
5714 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5716 Output_data_got_powerpc
<size
, big_endian
>* got
5717 = target
->got_section(symtab
, layout
);
5718 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5719 if (gsym
->is_undefined()
5720 || gsym
->is_from_dynobj())
5722 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5723 elfcpp::R_POWERPC_TPREL
);
5727 unsigned int off
= got
->add_constant(0);
5728 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5729 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5730 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5735 else if (tls_type
== tls::TLSOPT_TO_LE
)
5737 // no GOT relocs needed for Local Exec.
5745 unsupported_reloc_global(object
, r_type
, gsym
);
5751 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5752 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5753 case elfcpp::R_POWERPC_GOT_TPREL16
:
5754 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5755 case elfcpp::R_POWERPC_GOT16
:
5756 case elfcpp::R_PPC64_GOT16_DS
:
5757 case elfcpp::R_PPC64_TOC16
:
5758 case elfcpp::R_PPC64_TOC16_DS
:
5759 ppc_object
->set_has_small_toc_reloc();
5765 // Process relocations for gc.
5767 template<int size
, bool big_endian
>
5769 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5770 Symbol_table
* symtab
,
5772 Sized_relobj_file
<size
, big_endian
>* object
,
5773 unsigned int data_shndx
,
5775 const unsigned char* prelocs
,
5777 Output_section
* output_section
,
5778 bool needs_special_offset_handling
,
5779 size_t local_symbol_count
,
5780 const unsigned char* plocal_symbols
)
5782 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5783 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5784 Powerpc_relobj
<size
, big_endian
>* ppc_object
5785 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5787 ppc_object
->set_opd_valid();
5788 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5790 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5791 for (p
= ppc_object
->access_from_map()->begin();
5792 p
!= ppc_object
->access_from_map()->end();
5795 Address dst_off
= p
->first
;
5796 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5797 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5798 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5800 Object
* src_obj
= s
->first
;
5801 unsigned int src_indx
= s
->second
;
5802 symtab
->gc()->add_reference(src_obj
, src_indx
,
5803 ppc_object
, dst_indx
);
5807 ppc_object
->access_from_map()->clear();
5808 ppc_object
->process_gc_mark(symtab
);
5809 // Don't look at .opd relocs as .opd will reference everything.
5813 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5814 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5823 needs_special_offset_handling
,
5828 // Handle target specific gc actions when adding a gc reference from
5829 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5830 // and DST_OFF. For powerpc64, this adds a referenc to the code
5831 // section of a function descriptor.
5833 template<int size
, bool big_endian
>
5835 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5836 Symbol_table
* symtab
,
5838 unsigned int src_shndx
,
5840 unsigned int dst_shndx
,
5841 Address dst_off
) const
5843 if (size
!= 64 || dst_obj
->is_dynamic())
5846 Powerpc_relobj
<size
, big_endian
>* ppc_object
5847 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5848 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
5850 if (ppc_object
->opd_valid())
5852 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5853 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5857 // If we haven't run scan_opd_relocs, we must delay
5858 // processing this function descriptor reference.
5859 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5864 // Add any special sections for this symbol to the gc work list.
5865 // For powerpc64, this adds the code section of a function
5868 template<int size
, bool big_endian
>
5870 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5871 Symbol_table
* symtab
,
5876 Powerpc_relobj
<size
, big_endian
>* ppc_object
5877 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5879 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5880 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
5882 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5883 Address dst_off
= gsym
->value();
5884 if (ppc_object
->opd_valid())
5886 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5887 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5890 ppc_object
->add_gc_mark(dst_off
);
5895 // For a symbol location in .opd, set LOC to the location of the
5898 template<int size
, bool big_endian
>
5900 Target_powerpc
<size
, big_endian
>::do_function_location(
5901 Symbol_location
* loc
) const
5903 if (size
== 64 && loc
->shndx
!= 0)
5905 if (loc
->object
->is_dynamic())
5907 Powerpc_dynobj
<size
, big_endian
>* ppc_object
5908 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
5909 if (loc
->shndx
== ppc_object
->opd_shndx())
5912 Address off
= loc
->offset
- ppc_object
->opd_address();
5913 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
5914 loc
->offset
= dest_off
;
5919 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5920 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
5921 if (loc
->shndx
== ppc_object
->opd_shndx())
5924 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
5925 loc
->offset
= dest_off
;
5931 // Scan relocations for a section.
5933 template<int size
, bool big_endian
>
5935 Target_powerpc
<size
, big_endian
>::scan_relocs(
5936 Symbol_table
* symtab
,
5938 Sized_relobj_file
<size
, big_endian
>* object
,
5939 unsigned int data_shndx
,
5940 unsigned int sh_type
,
5941 const unsigned char* prelocs
,
5943 Output_section
* output_section
,
5944 bool needs_special_offset_handling
,
5945 size_t local_symbol_count
,
5946 const unsigned char* plocal_symbols
)
5948 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5949 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5951 if (sh_type
== elfcpp::SHT_REL
)
5953 gold_error(_("%s: unsupported REL reloc section"),
5954 object
->name().c_str());
5958 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5967 needs_special_offset_handling
,
5972 // Functor class for processing the global symbol table.
5973 // Removes symbols defined on discarded opd entries.
5975 template<bool big_endian
>
5976 class Global_symbol_visitor_opd
5979 Global_symbol_visitor_opd()
5983 operator()(Sized_symbol
<64>* sym
)
5985 if (sym
->has_symtab_index()
5986 || sym
->source() != Symbol::FROM_OBJECT
5987 || !sym
->in_real_elf())
5990 if (sym
->object()->is_dynamic())
5993 Powerpc_relobj
<64, big_endian
>* symobj
5994 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5995 if (symobj
->opd_shndx() == 0)
5999 unsigned int shndx
= sym
->shndx(&is_ordinary
);
6000 if (shndx
== symobj
->opd_shndx()
6001 && symobj
->get_opd_discard(sym
->value()))
6002 sym
->set_symtab_index(-1U);
6006 template<int size
, bool big_endian
>
6008 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
6010 Symbol_table
* symtab
)
6014 Output_data_save_res
<64, big_endian
>* savres
6015 = new Output_data_save_res
<64, big_endian
>(symtab
);
6016 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
6017 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6018 savres
, ORDER_TEXT
, false);
6022 // Sort linker created .got section first (for the header), then input
6023 // sections belonging to files using small model code.
6025 template<bool big_endian
>
6026 class Sort_toc_sections
6030 operator()(const Output_section::Input_section
& is1
,
6031 const Output_section::Input_section
& is2
) const
6033 if (!is1
.is_input_section() && is2
.is_input_section())
6036 = (is1
.is_input_section()
6037 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6038 ->has_small_toc_reloc()));
6040 = (is2
.is_input_section()
6041 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6042 ->has_small_toc_reloc()));
6043 return small1
&& !small2
;
6047 // Finalize the sections.
6049 template<int size
, bool big_endian
>
6051 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6053 const Input_objects
*,
6054 Symbol_table
* symtab
)
6056 if (parameters
->doing_static_link())
6058 // At least some versions of glibc elf-init.o have a strong
6059 // reference to __rela_iplt marker syms. A weak ref would be
6061 if (this->iplt_
!= NULL
)
6063 Reloc_section
* rel
= this->iplt_
->rel_plt();
6064 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6065 Symbol_table::PREDEFINED
, rel
, 0, 0,
6066 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6067 elfcpp::STV_HIDDEN
, 0, false, true);
6068 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6069 Symbol_table::PREDEFINED
, rel
, 0, 0,
6070 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6071 elfcpp::STV_HIDDEN
, 0, true, true);
6075 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6076 Symbol_table::PREDEFINED
, 0, 0,
6077 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6078 elfcpp::STV_HIDDEN
, 0, true, false);
6079 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6080 Symbol_table::PREDEFINED
, 0, 0,
6081 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6082 elfcpp::STV_HIDDEN
, 0, true, false);
6088 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6089 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6091 if (!parameters
->options().relocatable())
6093 this->define_save_restore_funcs(layout
, symtab
);
6095 // Annoyingly, we need to make these sections now whether or
6096 // not we need them. If we delay until do_relax then we
6097 // need to mess with the relaxation machinery checkpointing.
6098 this->got_section(symtab
, layout
);
6099 this->make_brlt_section(layout
);
6101 if (parameters
->options().toc_sort())
6103 Output_section
* os
= this->got_
->output_section();
6104 if (os
!= NULL
&& os
->input_sections().size() > 1)
6105 std::stable_sort(os
->input_sections().begin(),
6106 os
->input_sections().end(),
6107 Sort_toc_sections
<big_endian
>());
6112 // Fill in some more dynamic tags.
6113 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6116 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6118 : this->plt_
->rel_plt());
6119 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6120 this->rela_dyn_
, true, size
== 32);
6124 if (this->got_
!= NULL
)
6126 this->got_
->finalize_data_size();
6127 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6128 this->got_
, this->got_
->g_o_t());
6133 if (this->glink_
!= NULL
)
6135 this->glink_
->finalize_data_size();
6136 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6138 (this->glink_
->pltresolve_size
6144 // Emit any relocs we saved in an attempt to avoid generating COPY
6146 if (this->copy_relocs_
.any_saved_relocs())
6147 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6150 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6154 ok_lo_toc_insn(uint32_t insn
)
6156 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6157 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6158 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6159 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6160 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6161 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6162 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6163 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6164 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6165 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6166 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6167 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6168 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6169 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6170 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6172 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6173 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6174 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6177 // Return the value to use for a branch relocation.
6179 template<int size
, bool big_endian
>
6180 typename Target_powerpc
<size
, big_endian
>::Address
6181 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6182 const Symbol_table
* symtab
,
6184 const Sized_symbol
<size
>* gsym
,
6185 Powerpc_relobj
<size
, big_endian
>* object
,
6186 unsigned int *dest_shndx
)
6192 // If the symbol is defined in an opd section, ie. is a function
6193 // descriptor, use the function descriptor code entry address
6194 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6196 && gsym
->source() != Symbol::FROM_OBJECT
)
6199 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6200 unsigned int shndx
= symobj
->opd_shndx();
6203 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6204 if (opd_addr
== invalid_address
)
6206 opd_addr
+= symobj
->output_section_address(shndx
);
6207 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
6210 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
6211 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6214 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6215 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6216 *dest_shndx
= folded
.second
;
6218 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6219 gold_assert(sec_addr
!= invalid_address
);
6220 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6221 value
= sec_addr
+ sec_off
;
6226 // Perform a relocation.
6228 template<int size
, bool big_endian
>
6230 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6231 const Relocate_info
<size
, big_endian
>* relinfo
,
6232 Target_powerpc
* target
,
6235 const elfcpp::Rela
<size
, big_endian
>& rela
,
6236 unsigned int r_type
,
6237 const Sized_symbol
<size
>* gsym
,
6238 const Symbol_value
<size
>* psymval
,
6239 unsigned char* view
,
6241 section_size_type view_size
)
6246 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6248 case Track_tls::NOT_EXPECTED
:
6249 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6250 _("__tls_get_addr call lacks marker reloc"));
6252 case Track_tls::EXPECTED
:
6253 // We have already complained.
6255 case Track_tls::SKIP
:
6257 case Track_tls::NORMAL
:
6261 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6262 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6263 Powerpc_relobj
<size
, big_endian
>* const object
6264 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6266 bool has_plt_value
= false;
6267 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6269 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
6270 : object
->local_has_plt_offset(r_sym
))
6271 && (!psymval
->is_ifunc_symbol()
6272 || Scan::reloc_needs_plt_for_ifunc(object
, r_type
, false)))
6274 Stub_table
<size
, big_endian
>* stub_table
6275 = object
->stub_table(relinfo
->data_shndx
);
6276 if (stub_table
== NULL
)
6278 // This is a ref from a data section to an ifunc symbol.
6279 if (target
->stub_tables().size() != 0)
6280 stub_table
= target
->stub_tables()[0];
6282 gold_assert(stub_table
!= NULL
);
6285 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
6286 rela
.get_r_addend());
6288 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
6289 rela
.get_r_addend());
6290 gold_assert(off
!= invalid_address
);
6291 value
= stub_table
->stub_address() + off
;
6292 has_plt_value
= true;
6295 if (r_type
== elfcpp::R_POWERPC_GOT16
6296 || r_type
== elfcpp::R_POWERPC_GOT16_LO
6297 || r_type
== elfcpp::R_POWERPC_GOT16_HI
6298 || r_type
== elfcpp::R_POWERPC_GOT16_HA
6299 || r_type
== elfcpp::R_PPC64_GOT16_DS
6300 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
6304 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
6305 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
6309 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6310 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
6311 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
6313 value
-= target
->got_section()->got_base_offset(object
);
6315 else if (r_type
== elfcpp::R_PPC64_TOC
)
6317 value
= (target
->got_section()->output_section()->address()
6318 + object
->toc_base_offset());
6320 else if (gsym
!= NULL
6321 && (r_type
== elfcpp::R_POWERPC_REL24
6322 || r_type
== elfcpp::R_PPC_PLTREL24
)
6327 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
6328 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
6329 bool can_plt_call
= false;
6330 if (rela
.get_r_offset() + 8 <= view_size
)
6332 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
6333 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
6336 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
6338 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
6339 can_plt_call
= true;
6344 // If we don't have a branch and link followed by a nop,
6345 // we can't go via the plt because there is no place to
6346 // put a toc restoring instruction.
6347 // Unless we know we won't be returning.
6348 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
6349 can_plt_call
= true;
6353 // g++ as of 20130507 emits self-calls without a
6354 // following nop. This is arguably wrong since we have
6355 // conflicting information. On the one hand a global
6356 // symbol and on the other a local call sequence, but
6357 // don't error for this special case.
6358 // It isn't possible to cheaply verify we have exactly
6359 // such a call. Allow all calls to the same section.
6361 Address code
= value
;
6362 if (gsym
->source() == Symbol::FROM_OBJECT
6363 && gsym
->object() == object
)
6365 Address addend
= rela
.get_r_addend();
6366 unsigned int dest_shndx
;
6367 Address opdent
= psymval
->value(object
, addend
);
6368 code
= target
->symval_for_branch(relinfo
->symtab
, opdent
,
6369 gsym
, object
, &dest_shndx
);
6371 if (dest_shndx
== 0)
6372 dest_shndx
= gsym
->shndx(&is_ordinary
);
6373 ok
= dest_shndx
== relinfo
->data_shndx
;
6377 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6378 _("call lacks nop, can't restore toc; "
6379 "recompile with -fPIC"));
6385 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6386 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6387 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6388 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6390 // First instruction of a global dynamic sequence, arg setup insn.
6391 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6392 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6393 enum Got_type got_type
= GOT_TYPE_STANDARD
;
6394 if (tls_type
== tls::TLSOPT_NONE
)
6395 got_type
= GOT_TYPE_TLSGD
;
6396 else if (tls_type
== tls::TLSOPT_TO_IE
)
6397 got_type
= GOT_TYPE_TPREL
;
6398 if (got_type
!= GOT_TYPE_STANDARD
)
6402 gold_assert(gsym
->has_got_offset(got_type
));
6403 value
= gsym
->got_offset(got_type
);
6407 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6408 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
6409 value
= object
->local_got_offset(r_sym
, got_type
);
6411 value
-= target
->got_section()->got_base_offset(object
);
6413 if (tls_type
== tls::TLSOPT_TO_IE
)
6415 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6416 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6418 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6419 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6420 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
6422 insn
|= 32 << 26; // lwz
6424 insn
|= 58 << 26; // ld
6425 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6427 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6428 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6430 else if (tls_type
== tls::TLSOPT_TO_LE
)
6432 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6433 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6435 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6436 Insn insn
= addis_3_13
;
6439 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6440 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6441 value
= psymval
->value(object
, rela
.get_r_addend());
6445 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6447 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6448 r_type
= elfcpp::R_POWERPC_NONE
;
6452 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6453 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6454 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6455 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6457 // First instruction of a local dynamic sequence, arg setup insn.
6458 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6459 if (tls_type
== tls::TLSOPT_NONE
)
6461 value
= target
->tlsld_got_offset();
6462 value
-= target
->got_section()->got_base_offset(object
);
6466 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6467 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6468 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6470 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6471 Insn insn
= addis_3_13
;
6474 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6475 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6480 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6482 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6483 r_type
= elfcpp::R_POWERPC_NONE
;
6487 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
6488 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
6489 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
6490 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
6492 // Accesses relative to a local dynamic sequence address,
6493 // no optimisation here.
6496 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
6497 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
6501 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6502 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
6503 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
6505 value
-= target
->got_section()->got_base_offset(object
);
6507 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6508 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6509 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6510 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6512 // First instruction of initial exec sequence.
6513 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6514 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6515 if (tls_type
== tls::TLSOPT_NONE
)
6519 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
6520 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
6524 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6525 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
6526 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
6528 value
-= target
->got_section()->got_base_offset(object
);
6532 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6533 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6534 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6536 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6537 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6538 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6543 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6544 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6545 value
= psymval
->value(object
, rela
.get_r_addend());
6549 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6551 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6552 r_type
= elfcpp::R_POWERPC_NONE
;
6556 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6557 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6559 // Second instruction of a global dynamic sequence,
6560 // the __tls_get_addr call
6561 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6562 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6563 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6564 if (tls_type
!= tls::TLSOPT_NONE
)
6566 if (tls_type
== tls::TLSOPT_TO_IE
)
6568 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6569 Insn insn
= add_3_3_13
;
6572 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6573 r_type
= elfcpp::R_POWERPC_NONE
;
6577 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6578 Insn insn
= addi_3_3
;
6579 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6580 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6581 view
+= 2 * big_endian
;
6582 value
= psymval
->value(object
, rela
.get_r_addend());
6584 this->skip_next_tls_get_addr_call();
6587 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6588 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6590 // Second instruction of a local dynamic sequence,
6591 // the __tls_get_addr call
6592 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6593 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6594 if (tls_type
== tls::TLSOPT_TO_LE
)
6596 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6597 Insn insn
= addi_3_3
;
6598 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6599 this->skip_next_tls_get_addr_call();
6600 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6601 view
+= 2 * big_endian
;
6605 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6607 // Second instruction of an initial exec sequence
6608 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6609 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6610 if (tls_type
== tls::TLSOPT_TO_LE
)
6612 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6613 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6614 unsigned int reg
= size
== 32 ? 2 : 13;
6615 insn
= at_tls_transform(insn
, reg
);
6616 gold_assert(insn
!= 0);
6617 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6618 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6619 view
+= 2 * big_endian
;
6620 value
= psymval
->value(object
, rela
.get_r_addend());
6623 else if (!has_plt_value
)
6626 unsigned int dest_shndx
;
6627 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
6628 addend
= rela
.get_r_addend();
6629 value
= psymval
->value(object
, addend
);
6630 if (size
== 64 && is_branch_reloc(r_type
))
6631 value
= target
->symval_for_branch(relinfo
->symtab
, value
,
6632 gsym
, object
, &dest_shndx
);
6633 unsigned int max_branch_offset
= 0;
6634 if (r_type
== elfcpp::R_POWERPC_REL24
6635 || r_type
== elfcpp::R_PPC_PLTREL24
6636 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
6637 max_branch_offset
= 1 << 25;
6638 else if (r_type
== elfcpp::R_POWERPC_REL14
6639 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
6640 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
6641 max_branch_offset
= 1 << 15;
6642 if (max_branch_offset
!= 0
6643 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
6645 Stub_table
<size
, big_endian
>* stub_table
6646 = object
->stub_table(relinfo
->data_shndx
);
6647 if (stub_table
!= NULL
)
6649 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6650 if (off
!= invalid_address
)
6651 value
= (stub_table
->stub_address() + stub_table
->plt_size()
6659 case elfcpp::R_PPC64_REL64
:
6660 case elfcpp::R_POWERPC_REL32
:
6661 case elfcpp::R_POWERPC_REL24
:
6662 case elfcpp::R_PPC_PLTREL24
:
6663 case elfcpp::R_PPC_LOCAL24PC
:
6664 case elfcpp::R_POWERPC_REL16
:
6665 case elfcpp::R_POWERPC_REL16_LO
:
6666 case elfcpp::R_POWERPC_REL16_HI
:
6667 case elfcpp::R_POWERPC_REL16_HA
:
6668 case elfcpp::R_POWERPC_REL14
:
6669 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6670 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6674 case elfcpp::R_PPC64_TOC16
:
6675 case elfcpp::R_PPC64_TOC16_LO
:
6676 case elfcpp::R_PPC64_TOC16_HI
:
6677 case elfcpp::R_PPC64_TOC16_HA
:
6678 case elfcpp::R_PPC64_TOC16_DS
:
6679 case elfcpp::R_PPC64_TOC16_LO_DS
:
6680 // Subtract the TOC base address.
6681 value
-= (target
->got_section()->output_section()->address()
6682 + object
->toc_base_offset());
6685 case elfcpp::R_POWERPC_SECTOFF
:
6686 case elfcpp::R_POWERPC_SECTOFF_LO
:
6687 case elfcpp::R_POWERPC_SECTOFF_HI
:
6688 case elfcpp::R_POWERPC_SECTOFF_HA
:
6689 case elfcpp::R_PPC64_SECTOFF_DS
:
6690 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6692 value
-= os
->address();
6695 case elfcpp::R_PPC64_TPREL16_DS
:
6696 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6698 // R_PPC_TLSGD and R_PPC_TLSLD
6700 case elfcpp::R_POWERPC_TPREL16
:
6701 case elfcpp::R_POWERPC_TPREL16_LO
:
6702 case elfcpp::R_POWERPC_TPREL16_HI
:
6703 case elfcpp::R_POWERPC_TPREL16_HA
:
6704 case elfcpp::R_POWERPC_TPREL
:
6705 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6706 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6707 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6708 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6709 // tls symbol values are relative to tls_segment()->vaddr()
6713 case elfcpp::R_PPC64_DTPREL16_DS
:
6714 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6715 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6716 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6717 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6718 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6720 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6721 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6723 case elfcpp::R_POWERPC_DTPREL16
:
6724 case elfcpp::R_POWERPC_DTPREL16_LO
:
6725 case elfcpp::R_POWERPC_DTPREL16_HI
:
6726 case elfcpp::R_POWERPC_DTPREL16_HA
:
6727 case elfcpp::R_POWERPC_DTPREL
:
6728 // tls symbol values are relative to tls_segment()->vaddr()
6729 value
-= dtp_offset
;
6736 Insn branch_bit
= 0;
6739 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6740 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6741 branch_bit
= 1 << 21;
6742 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6743 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6745 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6746 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6749 if (this->is_isa_v2
)
6751 // Set 'a' bit. This is 0b00010 in BO field for branch
6752 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6753 // for branch on CTR insns (BO == 1a00t or 1a01t).
6754 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6756 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6763 // Invert 'y' bit if not the default.
6764 if (static_cast<Signed_address
>(value
) < 0)
6767 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6777 // Multi-instruction sequences that access the TOC can be
6778 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6779 // to nop; addi rb,r2,x;
6785 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6786 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6787 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6788 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6789 case elfcpp::R_POWERPC_GOT16_HA
:
6790 case elfcpp::R_PPC64_TOC16_HA
:
6791 if (parameters
->options().toc_optimize())
6793 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6794 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6795 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6796 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6797 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6798 _("toc optimization is not supported "
6799 "for %#08x instruction"), insn
);
6800 else if (value
+ 0x8000 < 0x10000)
6802 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6808 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6809 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6810 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6811 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6812 case elfcpp::R_POWERPC_GOT16_LO
:
6813 case elfcpp::R_PPC64_GOT16_LO_DS
:
6814 case elfcpp::R_PPC64_TOC16_LO
:
6815 case elfcpp::R_PPC64_TOC16_LO_DS
:
6816 if (parameters
->options().toc_optimize())
6818 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6819 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6820 if (!ok_lo_toc_insn(insn
))
6821 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6822 _("toc optimization is not supported "
6823 "for %#08x instruction"), insn
);
6824 else if (value
+ 0x8000 < 0x10000)
6826 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6828 // Transform addic to addi when we change reg.
6829 insn
&= ~((0x3f << 26) | (0x1f << 16));
6830 insn
|= (14u << 26) | (2 << 16);
6834 insn
&= ~(0x1f << 16);
6837 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6844 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6847 case elfcpp::R_POWERPC_ADDR32
:
6848 case elfcpp::R_POWERPC_UADDR32
:
6850 overflow
= Reloc::CHECK_BITFIELD
;
6853 case elfcpp::R_POWERPC_REL32
:
6855 overflow
= Reloc::CHECK_SIGNED
;
6858 case elfcpp::R_POWERPC_ADDR24
:
6859 case elfcpp::R_POWERPC_ADDR16
:
6860 case elfcpp::R_POWERPC_UADDR16
:
6861 case elfcpp::R_PPC64_ADDR16_DS
:
6862 case elfcpp::R_POWERPC_ADDR14
:
6863 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6864 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6865 overflow
= Reloc::CHECK_BITFIELD
;
6868 case elfcpp::R_POWERPC_REL24
:
6869 case elfcpp::R_PPC_PLTREL24
:
6870 case elfcpp::R_PPC_LOCAL24PC
:
6871 case elfcpp::R_POWERPC_REL16
:
6872 case elfcpp::R_PPC64_TOC16
:
6873 case elfcpp::R_POWERPC_GOT16
:
6874 case elfcpp::R_POWERPC_SECTOFF
:
6875 case elfcpp::R_POWERPC_TPREL16
:
6876 case elfcpp::R_POWERPC_DTPREL16
:
6877 case elfcpp::R_PPC64_TPREL16_DS
:
6878 case elfcpp::R_PPC64_DTPREL16_DS
:
6879 case elfcpp::R_PPC64_TOC16_DS
:
6880 case elfcpp::R_PPC64_GOT16_DS
:
6881 case elfcpp::R_PPC64_SECTOFF_DS
:
6882 case elfcpp::R_POWERPC_REL14
:
6883 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6884 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6885 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6886 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6887 case elfcpp::R_POWERPC_GOT_TPREL16
:
6888 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6889 overflow
= Reloc::CHECK_SIGNED
;
6893 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6894 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6897 case elfcpp::R_POWERPC_NONE
:
6898 case elfcpp::R_POWERPC_TLS
:
6899 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6900 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6901 case elfcpp::R_PPC_EMB_MRKREF
:
6904 case elfcpp::R_PPC64_ADDR64
:
6905 case elfcpp::R_PPC64_REL64
:
6906 case elfcpp::R_PPC64_TOC
:
6907 Reloc::addr64(view
, value
);
6910 case elfcpp::R_POWERPC_TPREL
:
6911 case elfcpp::R_POWERPC_DTPREL
:
6913 Reloc::addr64(view
, value
);
6915 status
= Reloc::addr32(view
, value
, overflow
);
6918 case elfcpp::R_PPC64_UADDR64
:
6919 Reloc::addr64_u(view
, value
);
6922 case elfcpp::R_POWERPC_ADDR32
:
6923 status
= Reloc::addr32(view
, value
, overflow
);
6926 case elfcpp::R_POWERPC_REL32
:
6927 case elfcpp::R_POWERPC_UADDR32
:
6928 status
= Reloc::addr32_u(view
, value
, overflow
);
6931 case elfcpp::R_POWERPC_ADDR24
:
6932 case elfcpp::R_POWERPC_REL24
:
6933 case elfcpp::R_PPC_PLTREL24
:
6934 case elfcpp::R_PPC_LOCAL24PC
:
6935 status
= Reloc::addr24(view
, value
, overflow
);
6938 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6939 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6942 status
= Reloc::addr16_ds(view
, value
, overflow
);
6945 case elfcpp::R_POWERPC_ADDR16
:
6946 case elfcpp::R_POWERPC_REL16
:
6947 case elfcpp::R_PPC64_TOC16
:
6948 case elfcpp::R_POWERPC_GOT16
:
6949 case elfcpp::R_POWERPC_SECTOFF
:
6950 case elfcpp::R_POWERPC_TPREL16
:
6951 case elfcpp::R_POWERPC_DTPREL16
:
6952 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6953 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6954 case elfcpp::R_POWERPC_GOT_TPREL16
:
6955 case elfcpp::R_POWERPC_ADDR16_LO
:
6956 case elfcpp::R_POWERPC_REL16_LO
:
6957 case elfcpp::R_PPC64_TOC16_LO
:
6958 case elfcpp::R_POWERPC_GOT16_LO
:
6959 case elfcpp::R_POWERPC_SECTOFF_LO
:
6960 case elfcpp::R_POWERPC_TPREL16_LO
:
6961 case elfcpp::R_POWERPC_DTPREL16_LO
:
6962 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6963 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6964 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6965 status
= Reloc::addr16(view
, value
, overflow
);
6968 case elfcpp::R_POWERPC_UADDR16
:
6969 status
= Reloc::addr16_u(view
, value
, overflow
);
6972 case elfcpp::R_POWERPC_ADDR16_HI
:
6973 case elfcpp::R_POWERPC_REL16_HI
:
6974 case elfcpp::R_PPC64_TOC16_HI
:
6975 case elfcpp::R_POWERPC_GOT16_HI
:
6976 case elfcpp::R_POWERPC_SECTOFF_HI
:
6977 case elfcpp::R_POWERPC_TPREL16_HI
:
6978 case elfcpp::R_POWERPC_DTPREL16_HI
:
6979 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6980 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6981 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6982 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6983 Reloc::addr16_hi(view
, value
);
6986 case elfcpp::R_POWERPC_ADDR16_HA
:
6987 case elfcpp::R_POWERPC_REL16_HA
:
6988 case elfcpp::R_PPC64_TOC16_HA
:
6989 case elfcpp::R_POWERPC_GOT16_HA
:
6990 case elfcpp::R_POWERPC_SECTOFF_HA
:
6991 case elfcpp::R_POWERPC_TPREL16_HA
:
6992 case elfcpp::R_POWERPC_DTPREL16_HA
:
6993 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6994 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6995 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6996 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6997 Reloc::addr16_ha(view
, value
);
7000 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
7002 // R_PPC_EMB_NADDR16_LO
7004 case elfcpp::R_PPC64_ADDR16_HIGHER
:
7005 case elfcpp::R_PPC64_TPREL16_HIGHER
:
7006 Reloc::addr16_hi2(view
, value
);
7009 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
7011 // R_PPC_EMB_NADDR16_HI
7013 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
7014 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
7015 Reloc::addr16_ha2(view
, value
);
7018 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
7020 // R_PPC_EMB_NADDR16_HA
7022 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7023 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7024 Reloc::addr16_hi3(view
, value
);
7027 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7031 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7032 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7033 Reloc::addr16_ha3(view
, value
);
7036 case elfcpp::R_PPC64_DTPREL16_DS
:
7037 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7039 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7041 case elfcpp::R_PPC64_TPREL16_DS
:
7042 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7044 // R_PPC_TLSGD, R_PPC_TLSLD
7046 case elfcpp::R_PPC64_ADDR16_DS
:
7047 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7048 case elfcpp::R_PPC64_TOC16_DS
:
7049 case elfcpp::R_PPC64_TOC16_LO_DS
:
7050 case elfcpp::R_PPC64_GOT16_DS
:
7051 case elfcpp::R_PPC64_GOT16_LO_DS
:
7052 case elfcpp::R_PPC64_SECTOFF_DS
:
7053 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7054 status
= Reloc::addr16_ds(view
, value
, overflow
);
7057 case elfcpp::R_POWERPC_ADDR14
:
7058 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7059 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7060 case elfcpp::R_POWERPC_REL14
:
7061 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7062 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7063 status
= Reloc::addr14(view
, value
, overflow
);
7066 case elfcpp::R_POWERPC_COPY
:
7067 case elfcpp::R_POWERPC_GLOB_DAT
:
7068 case elfcpp::R_POWERPC_JMP_SLOT
:
7069 case elfcpp::R_POWERPC_RELATIVE
:
7070 case elfcpp::R_POWERPC_DTPMOD
:
7071 case elfcpp::R_PPC64_JMP_IREL
:
7072 case elfcpp::R_POWERPC_IRELATIVE
:
7073 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7074 _("unexpected reloc %u in object file"),
7078 case elfcpp::R_PPC_EMB_SDA21
:
7083 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7087 case elfcpp::R_PPC_EMB_SDA2I16
:
7088 case elfcpp::R_PPC_EMB_SDA2REL
:
7091 // R_PPC64_TLSGD, R_PPC64_TLSLD
7094 case elfcpp::R_POWERPC_PLT32
:
7095 case elfcpp::R_POWERPC_PLTREL32
:
7096 case elfcpp::R_POWERPC_PLT16_LO
:
7097 case elfcpp::R_POWERPC_PLT16_HI
:
7098 case elfcpp::R_POWERPC_PLT16_HA
:
7099 case elfcpp::R_PPC_SDAREL16
:
7100 case elfcpp::R_POWERPC_ADDR30
:
7101 case elfcpp::R_PPC64_PLT64
:
7102 case elfcpp::R_PPC64_PLTREL64
:
7103 case elfcpp::R_PPC64_PLTGOT16
:
7104 case elfcpp::R_PPC64_PLTGOT16_LO
:
7105 case elfcpp::R_PPC64_PLTGOT16_HI
:
7106 case elfcpp::R_PPC64_PLTGOT16_HA
:
7107 case elfcpp::R_PPC64_PLT16_LO_DS
:
7108 case elfcpp::R_PPC64_PLTGOT16_DS
:
7109 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7110 case elfcpp::R_PPC_EMB_RELSEC16
:
7111 case elfcpp::R_PPC_EMB_RELST_LO
:
7112 case elfcpp::R_PPC_EMB_RELST_HI
:
7113 case elfcpp::R_PPC_EMB_RELST_HA
:
7114 case elfcpp::R_PPC_EMB_BIT_FLD
:
7115 case elfcpp::R_PPC_EMB_RELSDA
:
7116 case elfcpp::R_PPC_TOC16
:
7119 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7120 _("unsupported reloc %u"),
7124 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
7125 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7126 _("relocation overflow"));
7131 // Relocate section data.
7133 template<int size
, bool big_endian
>
7135 Target_powerpc
<size
, big_endian
>::relocate_section(
7136 const Relocate_info
<size
, big_endian
>* relinfo
,
7137 unsigned int sh_type
,
7138 const unsigned char* prelocs
,
7140 Output_section
* output_section
,
7141 bool needs_special_offset_handling
,
7142 unsigned char* view
,
7144 section_size_type view_size
,
7145 const Reloc_symbol_changes
* reloc_symbol_changes
)
7147 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7148 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
7149 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
7150 Powerpc_comdat_behavior
;
7152 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7154 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
7155 Powerpc_relocate
, Powerpc_comdat_behavior
>(
7161 needs_special_offset_handling
,
7165 reloc_symbol_changes
);
7168 class Powerpc_scan_relocatable_reloc
7171 // Return the strategy to use for a local symbol which is not a
7172 // section symbol, given the relocation type.
7173 inline Relocatable_relocs::Reloc_strategy
7174 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
7176 if (r_type
== 0 && r_sym
== 0)
7177 return Relocatable_relocs::RELOC_DISCARD
;
7178 return Relocatable_relocs::RELOC_COPY
;
7181 // Return the strategy to use for a local symbol which is a section
7182 // symbol, given the relocation type.
7183 inline Relocatable_relocs::Reloc_strategy
7184 local_section_strategy(unsigned int, Relobj
*)
7186 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
7189 // Return the strategy to use for a global symbol, given the
7190 // relocation type, the object, and the symbol index.
7191 inline Relocatable_relocs::Reloc_strategy
7192 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
7194 if (r_type
== elfcpp::R_PPC_PLTREL24
)
7195 return Relocatable_relocs::RELOC_SPECIAL
;
7196 return Relocatable_relocs::RELOC_COPY
;
7200 // Scan the relocs during a relocatable link.
7202 template<int size
, bool big_endian
>
7204 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
7205 Symbol_table
* symtab
,
7207 Sized_relobj_file
<size
, big_endian
>* object
,
7208 unsigned int data_shndx
,
7209 unsigned int sh_type
,
7210 const unsigned char* prelocs
,
7212 Output_section
* output_section
,
7213 bool needs_special_offset_handling
,
7214 size_t local_symbol_count
,
7215 const unsigned char* plocal_symbols
,
7216 Relocatable_relocs
* rr
)
7218 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7220 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
7221 Powerpc_scan_relocatable_reloc
>(
7229 needs_special_offset_handling
,
7235 // Emit relocations for a section.
7236 // This is a modified version of the function by the same name in
7237 // target-reloc.h. Using relocate_special_relocatable for
7238 // R_PPC_PLTREL24 would require duplication of the entire body of the
7239 // loop, so we may as well duplicate the whole thing.
7241 template<int size
, bool big_endian
>
7243 Target_powerpc
<size
, big_endian
>::relocate_relocs(
7244 const Relocate_info
<size
, big_endian
>* relinfo
,
7245 unsigned int sh_type
,
7246 const unsigned char* prelocs
,
7248 Output_section
* output_section
,
7249 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
7250 const Relocatable_relocs
* rr
,
7252 Address view_address
,
7254 unsigned char* reloc_view
,
7255 section_size_type reloc_view_size
)
7257 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7259 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
7261 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
7263 const int reloc_size
7264 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7266 Powerpc_relobj
<size
, big_endian
>* const object
7267 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7268 const unsigned int local_count
= object
->local_symbol_count();
7269 unsigned int got2_shndx
= object
->got2_shndx();
7270 Address got2_addend
= 0;
7271 if (got2_shndx
!= 0)
7273 got2_addend
= object
->get_output_section_offset(got2_shndx
);
7274 gold_assert(got2_addend
!= invalid_address
);
7277 unsigned char* pwrite
= reloc_view
;
7278 bool zap_next
= false;
7279 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
7281 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
7282 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
7285 Reltype
reloc(prelocs
);
7286 Reltype_write
reloc_write(pwrite
);
7288 Address offset
= reloc
.get_r_offset();
7289 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
7290 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
7291 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
7292 const unsigned int orig_r_sym
= r_sym
;
7293 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
7294 = reloc
.get_r_addend();
7295 const Symbol
* gsym
= NULL
;
7299 // We could arrange to discard these and other relocs for
7300 // tls optimised sequences in the strategy methods, but for
7301 // now do as BFD ld does.
7302 r_type
= elfcpp::R_POWERPC_NONE
;
7306 // Get the new symbol index.
7307 if (r_sym
< local_count
)
7311 case Relocatable_relocs::RELOC_COPY
:
7312 case Relocatable_relocs::RELOC_SPECIAL
:
7315 r_sym
= object
->symtab_index(r_sym
);
7316 gold_assert(r_sym
!= -1U);
7320 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
7322 // We are adjusting a section symbol. We need to find
7323 // the symbol table index of the section symbol for
7324 // the output section corresponding to input section
7325 // in which this symbol is defined.
7326 gold_assert(r_sym
< local_count
);
7328 unsigned int shndx
=
7329 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
7330 gold_assert(is_ordinary
);
7331 Output_section
* os
= object
->output_section(shndx
);
7332 gold_assert(os
!= NULL
);
7333 gold_assert(os
->needs_symtab_index());
7334 r_sym
= os
->symtab_index();
7344 gsym
= object
->global_symbol(r_sym
);
7345 gold_assert(gsym
!= NULL
);
7346 if (gsym
->is_forwarder())
7347 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
7349 gold_assert(gsym
->has_symtab_index());
7350 r_sym
= gsym
->symtab_index();
7353 // Get the new offset--the location in the output section where
7354 // this relocation should be applied.
7355 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7356 offset
+= offset_in_output_section
;
7359 section_offset_type sot_offset
=
7360 convert_types
<section_offset_type
, Address
>(offset
);
7361 section_offset_type new_sot_offset
=
7362 output_section
->output_offset(object
, relinfo
->data_shndx
,
7364 gold_assert(new_sot_offset
!= -1);
7365 offset
= new_sot_offset
;
7368 // In an object file, r_offset is an offset within the section.
7369 // In an executable or dynamic object, generated by
7370 // --emit-relocs, r_offset is an absolute address.
7371 if (!parameters
->options().relocatable())
7373 offset
+= view_address
;
7374 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7375 offset
-= offset_in_output_section
;
7378 // Handle the reloc addend based on the strategy.
7379 if (strategy
== Relocatable_relocs::RELOC_COPY
)
7381 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
7383 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
7384 addend
= psymval
->value(object
, addend
);
7386 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
7388 if (addend
>= 32768)
7389 addend
+= got2_addend
;
7394 if (!parameters
->options().relocatable())
7396 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7397 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7398 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7399 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7401 // First instruction of a global dynamic sequence,
7403 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7404 switch (this->optimize_tls_gd(final
))
7406 case tls::TLSOPT_TO_IE
:
7407 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7408 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7410 case tls::TLSOPT_TO_LE
:
7411 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7412 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7413 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7416 r_type
= elfcpp::R_POWERPC_NONE
;
7417 offset
-= 2 * big_endian
;
7424 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7425 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7426 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7427 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7429 // First instruction of a local dynamic sequence,
7431 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7433 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7434 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7436 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7437 const Output_section
* os
= relinfo
->layout
->tls_segment()
7439 gold_assert(os
!= NULL
);
7440 gold_assert(os
->needs_symtab_index());
7441 r_sym
= os
->symtab_index();
7442 addend
= dtp_offset
;
7446 r_type
= elfcpp::R_POWERPC_NONE
;
7447 offset
-= 2 * big_endian
;
7451 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7452 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7453 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7454 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7456 // First instruction of initial exec sequence.
7457 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7458 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7460 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7461 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7462 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7465 r_type
= elfcpp::R_POWERPC_NONE
;
7466 offset
-= 2 * big_endian
;
7470 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7471 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7473 // Second instruction of a global dynamic sequence,
7474 // the __tls_get_addr call
7475 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7476 switch (this->optimize_tls_gd(final
))
7478 case tls::TLSOPT_TO_IE
:
7479 r_type
= elfcpp::R_POWERPC_NONE
;
7482 case tls::TLSOPT_TO_LE
:
7483 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7484 offset
+= 2 * big_endian
;
7491 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7492 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7494 // Second instruction of a local dynamic sequence,
7495 // the __tls_get_addr call
7496 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7498 const Output_section
* os
= relinfo
->layout
->tls_segment()
7500 gold_assert(os
!= NULL
);
7501 gold_assert(os
->needs_symtab_index());
7502 r_sym
= os
->symtab_index();
7503 addend
= dtp_offset
;
7504 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7505 offset
+= 2 * big_endian
;
7509 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7511 // Second instruction of an initial exec sequence
7512 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7513 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7515 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7516 offset
+= 2 * big_endian
;
7521 reloc_write
.put_r_offset(offset
);
7522 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
7523 reloc_write
.put_r_addend(addend
);
7525 pwrite
+= reloc_size
;
7528 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
7529 == reloc_view_size
);
7532 // Return the value to use for a dynamic symbol which requires special
7533 // treatment. This is how we support equality comparisons of function
7534 // pointers across shared library boundaries, as described in the
7535 // processor specific ABI supplement.
7537 template<int size
, bool big_endian
>
7539 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7543 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7544 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7545 p
!= this->stub_tables_
.end();
7548 Address off
= (*p
)->find_plt_call_entry(gsym
);
7549 if (off
!= invalid_address
)
7550 return (*p
)->stub_address() + off
;
7556 // Return the PLT address to use for a local symbol.
7557 template<int size
, bool big_endian
>
7559 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
7560 const Relobj
* object
,
7561 unsigned int symndx
) const
7565 const Sized_relobj
<size
, big_endian
>* relobj
7566 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
7567 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7568 p
!= this->stub_tables_
.end();
7571 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
7573 if (off
!= invalid_address
)
7574 return (*p
)->stub_address() + off
;
7580 // Return the PLT address to use for a global symbol.
7581 template<int size
, bool big_endian
>
7583 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
7584 const Symbol
* gsym
) const
7588 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7589 p
!= this->stub_tables_
.end();
7592 Address off
= (*p
)->find_plt_call_entry(gsym
);
7593 if (off
!= invalid_address
)
7594 return (*p
)->stub_address() + off
;
7600 // Return the offset to use for the GOT_INDX'th got entry which is
7601 // for a local tls symbol specified by OBJECT, SYMNDX.
7602 template<int size
, bool big_endian
>
7604 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
7605 const Relobj
* object
,
7606 unsigned int symndx
,
7607 unsigned int got_indx
) const
7609 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7610 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
7611 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
7613 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7614 got_type
<= GOT_TYPE_TPREL
;
7615 got_type
= Got_type(got_type
+ 1))
7616 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
7618 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
7619 if (got_type
== GOT_TYPE_TLSGD
)
7621 if (off
== got_indx
* (size
/ 8))
7623 if (got_type
== GOT_TYPE_TPREL
)
7633 // Return the offset to use for the GOT_INDX'th got entry which is
7634 // for global tls symbol GSYM.
7635 template<int size
, bool big_endian
>
7637 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
7639 unsigned int got_indx
) const
7641 if (gsym
->type() == elfcpp::STT_TLS
)
7643 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7644 got_type
<= GOT_TYPE_TPREL
;
7645 got_type
= Got_type(got_type
+ 1))
7646 if (gsym
->has_got_offset(got_type
))
7648 unsigned int off
= gsym
->got_offset(got_type
);
7649 if (got_type
== GOT_TYPE_TLSGD
)
7651 if (off
== got_indx
* (size
/ 8))
7653 if (got_type
== GOT_TYPE_TPREL
)
7663 // The selector for powerpc object files.
7665 template<int size
, bool big_endian
>
7666 class Target_selector_powerpc
: public Target_selector
7669 Target_selector_powerpc()
7670 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7673 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7674 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7676 ? (big_endian
? "elf64ppc" : "elf64lppc")
7677 : (big_endian
? "elf32ppc" : "elf32lppc")))
7681 do_instantiate_target()
7682 { return new Target_powerpc
<size
, big_endian
>(); }
7685 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7686 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7687 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7688 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7690 // Instantiate these constants for -O0
7691 template<int size
, bool big_endian
>
7692 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7693 template<int size
, bool big_endian
>
7694 const typename Stub_table
<size
, big_endian
>::Address
7695 Stub_table
<size
, big_endian
>::invalid_address
;
7696 template<int size
, bool big_endian
>
7697 const typename Target_powerpc
<size
, big_endian
>::Address
7698 Target_powerpc
<size
, big_endian
>::invalid_address
;
7700 } // End anonymous namespace.