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 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 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1185 unsigned int tlsld_got_offset_
;
1187 Stub_tables stub_tables_
;
1188 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1189 Branch_lookup_table branch_lookup_table_
;
1191 typedef std::vector
<Branch_info
> Branches
;
1192 Branches branch_info_
;
1194 bool plt_thread_safe_
;
1198 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1201 true, // is_big_endian
1202 elfcpp::EM_PPC
, // machine_code
1203 false, // has_make_symbol
1204 false, // has_resolve
1205 false, // has_code_fill
1206 true, // is_default_stack_executable
1207 false, // can_icf_inline_merge_sections
1209 "/usr/lib/ld.so.1", // dynamic_linker
1210 0x10000000, // default_text_segment_address
1211 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1212 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1213 false, // isolate_execinstr
1215 elfcpp::SHN_UNDEF
, // small_common_shndx
1216 elfcpp::SHN_UNDEF
, // large_common_shndx
1217 0, // small_common_section_flags
1218 0, // large_common_section_flags
1219 NULL
, // attributes_section
1220 NULL
, // attributes_vendor
1221 "_start" // entry_symbol_name
1225 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1228 false, // is_big_endian
1229 elfcpp::EM_PPC
, // machine_code
1230 false, // has_make_symbol
1231 false, // has_resolve
1232 false, // has_code_fill
1233 true, // is_default_stack_executable
1234 false, // can_icf_inline_merge_sections
1236 "/usr/lib/ld.so.1", // dynamic_linker
1237 0x10000000, // default_text_segment_address
1238 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1239 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1240 false, // isolate_execinstr
1242 elfcpp::SHN_UNDEF
, // small_common_shndx
1243 elfcpp::SHN_UNDEF
, // large_common_shndx
1244 0, // small_common_section_flags
1245 0, // large_common_section_flags
1246 NULL
, // attributes_section
1247 NULL
, // attributes_vendor
1248 "_start" // entry_symbol_name
1252 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
1255 true, // is_big_endian
1256 elfcpp::EM_PPC64
, // machine_code
1257 false, // has_make_symbol
1258 false, // has_resolve
1259 false, // has_code_fill
1260 true, // is_default_stack_executable
1261 false, // can_icf_inline_merge_sections
1263 "/usr/lib/ld.so.1", // dynamic_linker
1264 0x10000000, // default_text_segment_address
1265 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1266 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1267 false, // isolate_execinstr
1269 elfcpp::SHN_UNDEF
, // small_common_shndx
1270 elfcpp::SHN_UNDEF
, // large_common_shndx
1271 0, // small_common_section_flags
1272 0, // large_common_section_flags
1273 NULL
, // attributes_section
1274 NULL
, // attributes_vendor
1275 "_start" // entry_symbol_name
1279 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1282 false, // is_big_endian
1283 elfcpp::EM_PPC64
, // machine_code
1284 false, // has_make_symbol
1285 false, // has_resolve
1286 false, // has_code_fill
1287 true, // is_default_stack_executable
1288 false, // can_icf_inline_merge_sections
1290 "/usr/lib/ld.so.1", // dynamic_linker
1291 0x10000000, // default_text_segment_address
1292 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1293 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1294 false, // isolate_execinstr
1296 elfcpp::SHN_UNDEF
, // small_common_shndx
1297 elfcpp::SHN_UNDEF
, // large_common_shndx
1298 0, // small_common_section_flags
1299 0, // large_common_section_flags
1300 NULL
, // attributes_section
1301 NULL
, // attributes_vendor
1302 "_start" // entry_symbol_name
1306 is_branch_reloc(unsigned int r_type
)
1308 return (r_type
== elfcpp::R_POWERPC_REL24
1309 || r_type
== elfcpp::R_PPC_PLTREL24
1310 || r_type
== elfcpp::R_PPC_LOCAL24PC
1311 || r_type
== elfcpp::R_POWERPC_REL14
1312 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1313 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1314 || r_type
== elfcpp::R_POWERPC_ADDR24
1315 || r_type
== elfcpp::R_POWERPC_ADDR14
1316 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1317 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1320 // If INSN is an opcode that may be used with an @tls operand, return
1321 // the transformed insn for TLS optimisation, otherwise return 0. If
1322 // REG is non-zero only match an insn with RB or RA equal to REG.
1324 at_tls_transform(uint32_t insn
, unsigned int reg
)
1326 if ((insn
& (0x3f << 26)) != 31 << 26)
1330 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1331 rtra
= insn
& ((1 << 26) - (1 << 16));
1332 else if (((insn
>> 16) & 0x1f) == reg
)
1333 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1337 if ((insn
& (0x3ff << 1)) == 266 << 1)
1340 else if ((insn
& (0x1f << 1)) == 23 << 1
1341 && ((insn
& (0x1f << 6)) < 14 << 6
1342 || ((insn
& (0x1f << 6)) >= 16 << 6
1343 && (insn
& (0x1f << 6)) < 24 << 6)))
1344 // load and store indexed -> dform
1345 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1346 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1347 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1348 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1349 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1351 insn
= (58 << 26) | 2;
1358 // Modified version of symtab.h class Symbol member
1359 // Given a direct absolute or pc-relative static relocation against
1360 // the global symbol, this function returns whether a dynamic relocation
1365 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1367 // No dynamic relocations in a static link!
1368 if (parameters
->doing_static_link())
1371 // A reference to an undefined symbol from an executable should be
1372 // statically resolved to 0, and does not need a dynamic relocation.
1373 // This matches gnu ld behavior.
1374 if (gsym
->is_undefined() && !parameters
->options().shared())
1377 // A reference to an absolute symbol does not need a dynamic relocation.
1378 if (gsym
->is_absolute())
1381 // An absolute reference within a position-independent output file
1382 // will need a dynamic relocation.
1383 if ((flags
& Symbol::ABSOLUTE_REF
)
1384 && parameters
->options().output_is_position_independent())
1387 // A function call that can branch to a local PLT entry does not need
1388 // a dynamic relocation.
1389 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1392 // A reference to any PLT entry in a non-position-independent executable
1393 // does not need a dynamic relocation.
1394 // Except due to having function descriptors on powerpc64 we don't define
1395 // functions to their plt code in an executable, so this doesn't apply.
1397 && !parameters
->options().output_is_position_independent()
1398 && gsym
->has_plt_offset())
1401 // A reference to a symbol defined in a dynamic object or to a
1402 // symbol that is preemptible will need a dynamic relocation.
1403 if (gsym
->is_from_dynobj()
1404 || gsym
->is_undefined()
1405 || gsym
->is_preemptible())
1408 // For all other cases, return FALSE.
1412 // Modified version of symtab.h class Symbol member
1413 // Whether we should use the PLT offset associated with a symbol for
1414 // a relocation. FLAGS is a set of Reference_flags.
1418 use_plt_offset(const Symbol
* gsym
, int flags
)
1420 // If the symbol doesn't have a PLT offset, then naturally we
1421 // don't want to use it.
1422 if (!gsym
->has_plt_offset())
1425 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1426 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1429 // If we are going to generate a dynamic relocation, then we will
1430 // wind up using that, so no need to use the PLT entry.
1431 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1434 // If the symbol is from a dynamic object, we need to use the PLT
1436 if (gsym
->is_from_dynobj())
1439 // If we are generating a shared object, and this symbol is
1440 // undefined or preemptible, we need to use the PLT entry.
1441 if (parameters
->options().shared()
1442 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1445 // If this is a call to a weak undefined symbol, we need to use
1446 // the PLT entry; the symbol may be defined by a library loaded
1448 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1451 // Otherwise we can use the regular definition.
1455 template<int size
, bool big_endian
>
1456 class Powerpc_relocate_functions
1473 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1474 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1476 template<int valsize
>
1478 has_overflow_signed(Address value
)
1480 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1481 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1482 limit
<<= ((valsize
- 1) >> 1);
1483 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1484 return value
+ limit
> (limit
<< 1) - 1;
1487 template<int valsize
>
1489 has_overflow_bitfield(Address value
)
1491 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1492 limit
<<= ((valsize
- 1) >> 1);
1493 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1494 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1497 template<int valsize
>
1498 static inline Status
1499 overflowed(Address value
, Overflow_check overflow
)
1501 if (overflow
== CHECK_SIGNED
)
1503 if (has_overflow_signed
<valsize
>(value
))
1504 return STATUS_OVERFLOW
;
1506 else if (overflow
== CHECK_BITFIELD
)
1508 if (has_overflow_bitfield
<valsize
>(value
))
1509 return STATUS_OVERFLOW
;
1514 // Do a simple RELA relocation
1515 template<int valsize
>
1516 static inline Status
1517 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1519 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1520 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1521 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1522 return overflowed
<valsize
>(value
, overflow
);
1525 template<int valsize
>
1526 static inline Status
1527 rela(unsigned char* view
,
1528 unsigned int right_shift
,
1529 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1531 Overflow_check overflow
)
1533 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1534 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1535 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1536 Valtype reloc
= value
>> right_shift
;
1539 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1540 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1543 // Do a simple RELA relocation, unaligned.
1544 template<int valsize
>
1545 static inline Status
1546 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1548 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1549 return overflowed
<valsize
>(value
, overflow
);
1552 template<int valsize
>
1553 static inline Status
1554 rela_ua(unsigned char* view
,
1555 unsigned int right_shift
,
1556 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1558 Overflow_check overflow
)
1560 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1562 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1563 Valtype reloc
= value
>> right_shift
;
1566 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1567 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1571 // R_PPC64_ADDR64: (Symbol + Addend)
1573 addr64(unsigned char* view
, Address value
)
1574 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1576 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1578 addr64_u(unsigned char* view
, Address value
)
1579 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1581 // R_POWERPC_ADDR32: (Symbol + Addend)
1582 static inline Status
1583 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1584 { return This::template rela
<32>(view
, value
, overflow
); }
1586 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1587 static inline Status
1588 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1589 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1591 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1592 static inline Status
1593 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1595 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1596 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1597 stat
= STATUS_OVERFLOW
;
1601 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1602 static inline Status
1603 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1604 { return This::template rela
<16>(view
, value
, overflow
); }
1606 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1607 static inline Status
1608 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1609 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1611 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1612 static inline Status
1613 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1615 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1616 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1617 stat
= STATUS_OVERFLOW
;
1621 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1623 addr16_hi(unsigned char* view
, Address value
)
1624 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1626 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1628 addr16_ha(unsigned char* view
, Address value
)
1629 { This::addr16_hi(view
, value
+ 0x8000); }
1631 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1633 addr16_hi2(unsigned char* view
, Address value
)
1634 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1636 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1638 addr16_ha2(unsigned char* view
, Address value
)
1639 { This::addr16_hi2(view
, value
+ 0x8000); }
1641 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1643 addr16_hi3(unsigned char* view
, Address value
)
1644 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1646 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1648 addr16_ha3(unsigned char* view
, Address value
)
1649 { This::addr16_hi3(view
, value
+ 0x8000); }
1651 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1652 static inline Status
1653 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1655 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1656 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1657 stat
= STATUS_OVERFLOW
;
1662 // Stash away the index of .got2 or .opd in a relocatable object, if
1663 // such a section exists.
1665 template<int size
, bool big_endian
>
1667 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1668 Read_symbols_data
* sd
)
1670 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1671 const unsigned char* namesu
= sd
->section_names
->data();
1672 const char* names
= reinterpret_cast<const char*>(namesu
);
1673 section_size_type names_size
= sd
->section_names_size
;
1674 const unsigned char* s
;
1676 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1677 size
== 32 ? ".got2" : ".opd",
1678 names
, names_size
, NULL
);
1681 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1682 this->special_
= ndx
;
1684 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1687 // Examine .rela.opd to build info about function entry points.
1689 template<int size
, bool big_endian
>
1691 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1693 const unsigned char* prelocs
,
1694 const unsigned char* plocal_syms
)
1698 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1700 const int reloc_size
1701 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1702 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1703 Address expected_off
= 0;
1704 bool regular
= true;
1705 unsigned int opd_ent_size
= 0;
1707 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1709 Reltype
reloc(prelocs
);
1710 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1711 = reloc
.get_r_info();
1712 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1713 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1715 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1716 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1719 if (r_sym
< this->local_symbol_count())
1721 typename
elfcpp::Sym
<size
, big_endian
>
1722 lsym(plocal_syms
+ r_sym
* sym_size
);
1723 shndx
= lsym
.get_st_shndx();
1724 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1725 value
= lsym
.get_st_value();
1728 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1730 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1731 value
+ reloc
.get_r_addend());
1734 expected_off
= reloc
.get_r_offset();
1735 opd_ent_size
= expected_off
;
1737 else if (expected_off
!= reloc
.get_r_offset())
1739 expected_off
+= opd_ent_size
;
1741 else if (r_type
== elfcpp::R_PPC64_TOC
)
1743 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1748 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1749 this->name().c_str(), r_type
);
1753 if (reloc_count
<= 2)
1754 opd_ent_size
= this->section_size(this->opd_shndx());
1755 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1759 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1760 this->name().c_str());
1766 template<int size
, bool big_endian
>
1768 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1770 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1773 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1774 p
!= rd
->relocs
.end();
1777 if (p
->data_shndx
== this->opd_shndx())
1779 uint64_t opd_size
= this->section_size(this->opd_shndx());
1780 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1783 this->init_opd(opd_size
);
1784 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1785 rd
->local_symbols
->data());
1793 // Call Sized_dynobj::do_read_symbols to read the symbols then
1794 // read .opd from a dynamic object, filling in opd_ent_ vector,
1796 template<int size
, bool big_endian
>
1798 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1800 Sized_dynobj
<size
, big_endian
>::do_read_symbols(sd
);
1803 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1804 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1805 const unsigned char* namesu
= sd
->section_names
->data();
1806 const char* names
= reinterpret_cast<const char*>(namesu
);
1807 const unsigned char* s
= NULL
;
1808 const unsigned char* opd
;
1809 section_size_type opd_size
;
1811 // Find and read .opd section.
1814 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1815 sd
->section_names_size
,
1820 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1821 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1822 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1824 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1825 this->opd_address_
= shdr
.get_sh_addr();
1826 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1827 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1833 // Build set of executable sections.
1834 // Using a set is probably overkill. There is likely to be only
1835 // a few executable sections, typically .init, .text and .fini,
1836 // and they are generally grouped together.
1837 typedef std::set
<Sec_info
> Exec_sections
;
1838 Exec_sections exec_sections
;
1840 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
1842 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1843 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1844 && ((shdr
.get_sh_flags()
1845 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1846 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1847 && shdr
.get_sh_size() != 0)
1849 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
1850 shdr
.get_sh_size(), i
));
1853 if (exec_sections
.empty())
1856 // Look over the OPD entries. This is complicated by the fact
1857 // that some binaries will use two-word entries while others
1858 // will use the standard three-word entries. In most cases
1859 // the third word (the environment pointer for languages like
1860 // Pascal) is unused and will be zero. If the third word is
1861 // used it should not be pointing into executable sections,
1863 this->init_opd(opd_size
);
1864 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
1866 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
1867 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
1868 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
1870 // Chances are that this is the third word of an OPD entry.
1872 typename
Exec_sections::const_iterator e
1873 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
1874 if (e
!= exec_sections
.begin())
1877 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
1879 // We have an address in an executable section.
1880 // VAL ought to be the function entry, set it up.
1881 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
1882 // Skip second word of OPD entry, the TOC pointer.
1886 // If we didn't match any executable sections, we likely
1887 // have a non-zero third word in the OPD entry.
1892 // Set up some symbols.
1894 template<int size
, bool big_endian
>
1896 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1897 Symbol_table
* symtab
,
1902 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1903 // undefined when scanning relocs (and thus requires
1904 // non-relative dynamic relocs). The proper value will be
1906 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1907 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1909 Target_powerpc
<size
, big_endian
>* target
=
1910 static_cast<Target_powerpc
<size
, big_endian
>*>(
1911 parameters
->sized_target
<size
, big_endian
>());
1912 Output_data_got_powerpc
<size
, big_endian
>* got
1913 = target
->got_section(symtab
, layout
);
1914 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1915 Symbol_table::PREDEFINED
,
1919 elfcpp::STV_HIDDEN
, 0,
1923 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1924 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1925 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1927 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1929 = layout
->add_output_section_data(".sdata", 0,
1931 | elfcpp::SHF_WRITE
,
1932 sdata
, ORDER_SMALL_DATA
, false);
1933 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1934 Symbol_table::PREDEFINED
,
1935 os
, 32768, 0, elfcpp::STT_OBJECT
,
1936 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1942 // Set up PowerPC target specific relobj.
1944 template<int size
, bool big_endian
>
1946 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1947 const std::string
& name
,
1948 Input_file
* input_file
,
1949 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1951 int et
= ehdr
.get_e_type();
1952 // ET_EXEC files are valid input for --just-symbols/-R,
1953 // and we treat them as relocatable objects.
1954 if (et
== elfcpp::ET_REL
1955 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1957 Powerpc_relobj
<size
, big_endian
>* obj
=
1958 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1962 else if (et
== elfcpp::ET_DYN
)
1964 Powerpc_dynobj
<size
, big_endian
>* obj
=
1965 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1971 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1976 template<int size
, bool big_endian
>
1977 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1980 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1981 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1983 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1984 : Output_data_got
<size
, big_endian
>(),
1985 symtab_(symtab
), layout_(layout
),
1986 header_ent_cnt_(size
== 32 ? 3 : 1),
1987 header_index_(size
== 32 ? 0x2000 : 0)
1991 add_constant_pair(Valtype c1
, Valtype c2
)
1993 this->reserve_ent(2);
1994 unsigned int got_offset
= this->add_constant(c1
);
1995 this->add_constant(c2
);
1999 // Offset of _GLOBAL_OFFSET_TABLE_.
2003 return this->got_offset(this->header_index_
);
2006 // Offset of base used to access the GOT/TOC.
2007 // The got/toc pointer reg will be set to this value.
2009 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2012 return this->g_o_t();
2014 return (this->output_section()->address()
2015 + object
->toc_base_offset()
2019 // Ensure our GOT has a header.
2021 set_final_data_size()
2023 if (this->header_ent_cnt_
!= 0)
2024 this->make_header();
2025 Output_data_got
<size
, big_endian
>::set_final_data_size();
2028 // First word of GOT header needs some values that are not
2029 // handled by Output_data_got so poke them in here.
2030 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2032 do_write(Output_file
* of
)
2035 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2036 val
= this->layout_
->dynamic_section()->address();
2038 val
= this->output_section()->address() + 0x8000;
2039 this->replace_constant(this->header_index_
, val
);
2040 Output_data_got
<size
, big_endian
>::do_write(of
);
2045 reserve_ent(unsigned int cnt
= 1)
2047 if (this->header_ent_cnt_
== 0)
2049 if (this->num_entries() + cnt
> this->header_index_
)
2050 this->make_header();
2056 this->header_ent_cnt_
= 0;
2057 this->header_index_
= this->num_entries();
2060 Output_data_got
<size
, big_endian
>::add_constant(0);
2061 Output_data_got
<size
, big_endian
>::add_constant(0);
2062 Output_data_got
<size
, big_endian
>::add_constant(0);
2064 // Define _GLOBAL_OFFSET_TABLE_ at the header
2065 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2068 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2069 sym
->set_value(this->g_o_t());
2072 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2073 Symbol_table::PREDEFINED
,
2074 this, this->g_o_t(), 0,
2077 elfcpp::STV_HIDDEN
, 0,
2081 Output_data_got
<size
, big_endian
>::add_constant(0);
2084 // Stashed pointers.
2085 Symbol_table
* symtab_
;
2089 unsigned int header_ent_cnt_
;
2090 // GOT header index.
2091 unsigned int header_index_
;
2094 // Get the GOT section, creating it if necessary.
2096 template<int size
, bool big_endian
>
2097 Output_data_got_powerpc
<size
, big_endian
>*
2098 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2101 if (this->got_
== NULL
)
2103 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2106 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2108 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2109 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2110 this->got_
, ORDER_DATA
, false);
2116 // Get the dynamic reloc section, creating it if necessary.
2118 template<int size
, bool big_endian
>
2119 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2120 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2122 if (this->rela_dyn_
== NULL
)
2124 gold_assert(layout
!= NULL
);
2125 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2126 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2127 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2128 ORDER_DYNAMIC_RELOCS
, false);
2130 return this->rela_dyn_
;
2133 // Similarly, but for ifunc symbols get the one for ifunc.
2135 template<int size
, bool big_endian
>
2136 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2137 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2142 return this->rela_dyn_section(layout
);
2144 if (this->iplt_
== NULL
)
2145 this->make_iplt_section(symtab
, layout
);
2146 return this->iplt_
->rel_plt();
2152 // Determine the stub group size. The group size is the absolute
2153 // value of the parameter --stub-group-size. If --stub-group-size
2154 // is passed a negative value, we restrict stubs to be always before
2155 // the stubbed branches.
2156 Stub_control(int32_t size
)
2157 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2158 stub14_group_size_(abs(size
)),
2159 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
2160 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2162 if (stub_group_size_
== 1)
2165 if (stubs_always_before_branch_
)
2167 stub_group_size_
= 0x1e00000;
2168 stub14_group_size_
= 0x7800;
2172 stub_group_size_
= 0x1c00000;
2173 stub14_group_size_
= 0x7000;
2175 suppress_size_errors_
= true;
2179 // Return true iff input section can be handled by current stub
2182 can_add_to_stub_group(Output_section
* o
,
2183 const Output_section::Input_section
* i
,
2186 const Output_section::Input_section
*
2192 { return output_section_
; }
2198 FINDING_STUB_SECTION
,
2203 uint32_t stub_group_size_
;
2204 uint32_t stub14_group_size_
;
2205 bool stubs_always_before_branch_
;
2206 bool suppress_size_errors_
;
2207 uint64_t group_end_addr_
;
2208 const Output_section::Input_section
* owner_
;
2209 Output_section
* output_section_
;
2212 // Return true iff input section can be handled by current stub
2216 Stub_control::can_add_to_stub_group(Output_section
* o
,
2217 const Output_section::Input_section
* i
,
2221 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2222 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2224 uint64_t start_addr
= o
->address();
2227 // .init and .fini sections are pasted together to form a single
2228 // function. We can't be adding stubs in the middle of the function.
2229 this_size
= o
->data_size();
2232 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2233 this_size
= i
->data_size();
2235 uint64_t end_addr
= start_addr
+ this_size
;
2236 bool toobig
= this_size
> group_size
;
2238 if (toobig
&& !this->suppress_size_errors_
)
2239 gold_warning(_("%s:%s exceeds group size"),
2240 i
->relobj()->name().c_str(),
2241 i
->relobj()->section_name(i
->shndx()).c_str());
2243 if (this->state_
!= HAS_STUB_SECTION
2244 && (!whole_sec
|| this->output_section_
!= o
)
2245 && (this->state_
== NO_GROUP
2246 || this->group_end_addr_
- end_addr
< group_size
))
2249 this->output_section_
= o
;
2252 if (this->state_
== NO_GROUP
)
2254 this->state_
= FINDING_STUB_SECTION
;
2255 this->group_end_addr_
= end_addr
;
2257 else if (this->group_end_addr_
- start_addr
< group_size
)
2259 // Adding this section would make the group larger than GROUP_SIZE.
2260 else if (this->state_
== FINDING_STUB_SECTION
2261 && !this->stubs_always_before_branch_
2264 // But wait, there's more! Input sections up to GROUP_SIZE
2265 // bytes before the stub table can be handled by it too.
2266 this->state_
= HAS_STUB_SECTION
;
2267 this->group_end_addr_
= end_addr
;
2271 this->state_
= NO_GROUP
;
2277 // Look over all the input sections, deciding where to place stubs.
2279 template<int size
, bool big_endian
>
2281 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2284 Stub_control
stub_control(parameters
->options().stub_group_size());
2286 // Group input sections and insert stub table
2287 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
2288 Layout::Section_list section_list
;
2289 layout
->get_executable_sections(§ion_list
);
2290 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2291 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2292 o
!= section_list
.rend();
2295 typedef Output_section::Input_section_list Input_section_list
;
2296 for (Input_section_list::const_reverse_iterator i
2297 = (*o
)->input_sections().rbegin();
2298 i
!= (*o
)->input_sections().rend();
2301 if (i
->is_input_section())
2303 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2304 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2305 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2306 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2308 stub_table
->init(stub_control
.owner(),
2309 stub_control
.output_section());
2312 if (stub_table
== NULL
)
2313 stub_table
= this->new_stub_table();
2314 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
2318 if (stub_table
!= NULL
)
2320 const Output_section::Input_section
* i
= stub_control
.owner();
2321 if (!i
->is_input_section())
2323 // Corner case. A new stub group was made for the first
2324 // section (last one looked at here) for some reason, but
2325 // the first section is already being used as the owner for
2326 // a stub table for following sections. Force it into that
2328 gold_assert(this->stub_tables_
.size() >= 2);
2329 this->stub_tables_
.pop_back();
2331 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2332 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2333 ppcobj
->set_stub_table(i
->shndx(), this->stub_tables_
.back());
2336 stub_table
->init(i
, stub_control
.output_section());
2340 // If this branch needs a plt call stub, or a long branch stub, make one.
2342 template<int size
, bool big_endian
>
2344 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2345 Stub_table
<size
, big_endian
>* stub_table
,
2346 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2347 Symbol_table
* symtab
) const
2349 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2350 if (sym
!= NULL
&& sym
->is_forwarder())
2351 sym
= symtab
->resolve_forwards(sym
);
2352 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2354 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
2355 : this->object_
->local_has_plt_offset(this->r_sym_
))
2357 if (stub_table
== NULL
)
2358 stub_table
= this->object_
->stub_table(this->shndx_
);
2359 if (stub_table
== NULL
)
2361 // This is a ref from a data section to an ifunc symbol.
2362 stub_table
= ifunc_stub_table
;
2364 gold_assert(stub_table
!= NULL
);
2366 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2367 this->r_type_
, this->addend_
);
2369 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2370 this->r_type_
, this->addend_
);
2374 unsigned int max_branch_offset
;
2375 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2376 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2377 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2378 max_branch_offset
= 1 << 15;
2379 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2380 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2381 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2382 max_branch_offset
= 1 << 25;
2385 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2386 gold_assert(from
!= invalid_address
);
2387 from
+= (this->object_
->output_section(this->shndx_
)->address()
2392 switch (gsym
->source())
2394 case Symbol::FROM_OBJECT
:
2396 Object
* symobj
= gsym
->object();
2397 if (symobj
->is_dynamic()
2398 || symobj
->pluginobj() != NULL
)
2401 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2402 if (shndx
== elfcpp::SHN_UNDEF
)
2407 case Symbol::IS_UNDEFINED
:
2413 Symbol_table::Compute_final_value_status status
;
2414 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2415 if (status
!= Symbol_table::CFVS_OK
)
2420 const Symbol_value
<size
>* psymval
2421 = this->object_
->local_symbol(this->r_sym_
);
2422 Symbol_value
<size
> symval
;
2423 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2424 typename
ObjType::Compute_final_local_value_status status
2425 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2427 if (status
!= ObjType::CFLV_OK
2428 || !symval
.has_output_value())
2430 to
= symval
.value(this->object_
, 0);
2432 to
+= this->addend_
;
2433 if (stub_table
== NULL
)
2434 stub_table
= this->object_
->stub_table(this->shndx_
);
2435 if (size
== 64 && is_branch_reloc(this->r_type_
))
2437 unsigned int dest_shndx
;
2438 Target_powerpc
<size
, big_endian
>* target
=
2439 static_cast<Target_powerpc
<size
, big_endian
>*>(
2440 parameters
->sized_target
<size
, big_endian
>());
2441 to
= target
->symval_for_branch(symtab
, to
, gsym
,
2442 this->object_
, &dest_shndx
);
2444 Address delta
= to
- from
;
2445 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2447 if (stub_table
== NULL
)
2449 gold_warning(_("%s:%s: branch in non-executable section,"
2450 " no long branch stub for you"),
2451 this->object_
->name().c_str(),
2452 this->object_
->section_name(this->shndx_
).c_str());
2455 stub_table
->add_long_branch_entry(this->object_
, to
);
2460 // Relaxation hook. This is where we do stub generation.
2462 template<int size
, bool big_endian
>
2464 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2465 const Input_objects
*,
2466 Symbol_table
* symtab
,
2470 unsigned int prev_brlt_size
= 0;
2473 bool thread_safe
= parameters
->options().plt_thread_safe();
2474 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2476 static const char* const thread_starter
[] =
2480 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2482 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2483 "mq_notify", "create_timer",
2487 "GOMP_parallel_start",
2488 "GOMP_parallel_loop_static_start",
2489 "GOMP_parallel_loop_dynamic_start",
2490 "GOMP_parallel_loop_guided_start",
2491 "GOMP_parallel_loop_runtime_start",
2492 "GOMP_parallel_sections_start",
2495 if (parameters
->options().shared())
2499 for (unsigned int i
= 0;
2500 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2503 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2504 thread_safe
= (sym
!= NULL
2506 && sym
->in_real_elf());
2512 this->plt_thread_safe_
= thread_safe
;
2513 this->group_sections(layout
, task
);
2516 // We need address of stub tables valid for make_stub.
2517 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2518 p
!= this->stub_tables_
.end();
2521 const Powerpc_relobj
<size
, big_endian
>* object
2522 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2523 Address off
= object
->get_output_section_offset((*p
)->shndx());
2524 gold_assert(off
!= invalid_address
);
2525 Output_section
* os
= (*p
)->output_section();
2526 (*p
)->set_address_and_size(os
, off
);
2531 // Clear plt call stubs, long branch stubs and branch lookup table.
2532 prev_brlt_size
= this->branch_lookup_table_
.size();
2533 this->branch_lookup_table_
.clear();
2534 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2535 p
!= this->stub_tables_
.end();
2538 (*p
)->clear_stubs();
2542 // Build all the stubs.
2543 Stub_table
<size
, big_endian
>* ifunc_stub_table
2544 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2545 Stub_table
<size
, big_endian
>* one_stub_table
2546 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2547 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2548 b
!= this->branch_info_
.end();
2551 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2554 // Did anything change size?
2555 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2556 bool again
= num_huge_branches
!= prev_brlt_size
;
2557 if (size
== 64 && num_huge_branches
!= 0)
2558 this->make_brlt_section(layout
);
2559 if (size
== 64 && again
)
2560 this->brlt_section_
->set_current_size(num_huge_branches
);
2562 typedef Unordered_set
<Output_section
*> Output_sections
;
2563 Output_sections os_need_update
;
2564 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2565 p
!= this->stub_tables_
.end();
2568 if ((*p
)->size_update())
2571 (*p
)->add_eh_frame(layout
);
2572 os_need_update
.insert((*p
)->output_section());
2576 // Set output section offsets for all input sections in an output
2577 // section that just changed size. Anything past the stubs will
2579 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2580 p
!= os_need_update
.end();
2583 Output_section
* os
= *p
;
2585 typedef Output_section::Input_section_list Input_section_list
;
2586 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2587 i
!= os
->input_sections().end();
2590 off
= align_address(off
, i
->addralign());
2591 if (i
->is_input_section() || i
->is_relaxed_input_section())
2592 i
->relobj()->set_section_offset(i
->shndx(), off
);
2593 if (i
->is_relaxed_input_section())
2595 Stub_table
<size
, big_endian
>* stub_table
2596 = static_cast<Stub_table
<size
, big_endian
>*>(
2597 i
->relaxed_input_section());
2598 off
+= stub_table
->set_address_and_size(os
, off
);
2601 off
+= i
->data_size();
2603 // If .branch_lt is part of this output section, then we have
2604 // just done the offset adjustment.
2605 os
->clear_section_offsets_need_adjustment();
2610 && num_huge_branches
!= 0
2611 && parameters
->options().output_is_position_independent())
2613 // Fill in the BRLT relocs.
2614 this->brlt_section_
->reset_brlt_sizes();
2615 for (typename
Branch_lookup_table::const_iterator p
2616 = this->branch_lookup_table_
.begin();
2617 p
!= this->branch_lookup_table_
.end();
2620 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2622 this->brlt_section_
->finalize_brlt_sizes();
2627 template<int size
, bool big_endian
>
2629 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2630 unsigned char* oview
,
2634 uint64_t address
= plt
->address();
2635 off_t len
= plt
->data_size();
2637 if (plt
== this->glink_
)
2639 // See Output_data_glink::do_write() for glink contents.
2642 // There is one word before __glink_PLTresolve
2646 else if (parameters
->options().output_is_position_independent())
2648 // There are two FDEs for a position independent glink.
2649 // The first covers the branch table, the second
2650 // __glink_PLTresolve at the end of glink.
2651 off_t resolve_size
= this->glink_
->pltresolve_size
;
2653 len
-= resolve_size
;
2656 address
+= len
- resolve_size
;
2663 // Must be a stub table.
2664 const Stub_table
<size
, big_endian
>* stub_table
2665 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
2666 uint64_t stub_address
= stub_table
->stub_address();
2667 len
-= stub_address
- address
;
2668 address
= stub_address
;
2671 *paddress
= address
;
2675 // A class to handle the PLT data.
2677 template<int size
, bool big_endian
>
2678 class Output_data_plt_powerpc
: public Output_section_data_build
2681 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2682 size
, big_endian
> Reloc_section
;
2684 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2685 Reloc_section
* plt_rel
,
2686 unsigned int reserved_size
,
2688 : Output_section_data_build(size
== 32 ? 4 : 8),
2691 initial_plt_entry_size_(reserved_size
),
2695 // Add an entry to the PLT.
2700 add_ifunc_entry(Symbol
*);
2703 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2705 // Return the .rela.plt section data.
2712 // Return the number of PLT entries.
2716 if (this->current_data_size() == 0)
2718 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2722 // Return the offset of the first non-reserved PLT entry.
2724 first_plt_entry_offset()
2725 { return this->initial_plt_entry_size_
; }
2727 // Return the size of a PLT entry.
2729 get_plt_entry_size()
2730 { return plt_entry_size
; }
2734 do_adjust_output_section(Output_section
* os
)
2739 // Write to a map file.
2741 do_print_to_mapfile(Mapfile
* mapfile
) const
2742 { mapfile
->print_output_data(this, this->name_
); }
2745 // The size of an entry in the PLT.
2746 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2748 // Write out the PLT data.
2750 do_write(Output_file
*);
2752 // The reloc section.
2753 Reloc_section
* rel_
;
2754 // Allows access to .glink for do_write.
2755 Target_powerpc
<size
, big_endian
>* targ_
;
2756 // The size of the first reserved entry.
2757 int initial_plt_entry_size_
;
2758 // What to report in map file.
2762 // Add an entry to the PLT.
2764 template<int size
, bool big_endian
>
2766 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2768 if (!gsym
->has_plt_offset())
2770 section_size_type off
= this->current_data_size();
2772 off
+= this->first_plt_entry_offset();
2773 gsym
->set_plt_offset(off
);
2774 gsym
->set_needs_dynsym_entry();
2775 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2776 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2777 off
+= plt_entry_size
;
2778 this->set_current_data_size(off
);
2782 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2784 template<int size
, bool big_endian
>
2786 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2788 if (!gsym
->has_plt_offset())
2790 section_size_type off
= this->current_data_size();
2791 gsym
->set_plt_offset(off
);
2792 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2794 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2795 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2796 off
+= plt_entry_size
;
2797 this->set_current_data_size(off
);
2801 // Add an entry for a local ifunc symbol to the IPLT.
2803 template<int size
, bool big_endian
>
2805 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2806 Sized_relobj_file
<size
, big_endian
>* relobj
,
2807 unsigned int local_sym_index
)
2809 if (!relobj
->local_has_plt_offset(local_sym_index
))
2811 section_size_type off
= this->current_data_size();
2812 relobj
->set_local_plt_offset(local_sym_index
, off
);
2813 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2815 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2816 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2818 off
+= plt_entry_size
;
2819 this->set_current_data_size(off
);
2823 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2824 static const uint32_t add_2_2_11
= 0x7c425a14;
2825 static const uint32_t add_3_3_2
= 0x7c631214;
2826 static const uint32_t add_3_3_13
= 0x7c636a14;
2827 static const uint32_t add_11_0_11
= 0x7d605a14;
2828 static const uint32_t add_12_2_11
= 0x7d825a14;
2829 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2830 static const uint32_t addi_11_11
= 0x396b0000;
2831 static const uint32_t addi_12_12
= 0x398c0000;
2832 static const uint32_t addi_2_2
= 0x38420000;
2833 static const uint32_t addi_3_2
= 0x38620000;
2834 static const uint32_t addi_3_3
= 0x38630000;
2835 static const uint32_t addis_0_2
= 0x3c020000;
2836 static const uint32_t addis_0_13
= 0x3c0d0000;
2837 static const uint32_t addis_11_11
= 0x3d6b0000;
2838 static const uint32_t addis_11_30
= 0x3d7e0000;
2839 static const uint32_t addis_12_12
= 0x3d8c0000;
2840 static const uint32_t addis_12_2
= 0x3d820000;
2841 static const uint32_t addis_3_2
= 0x3c620000;
2842 static const uint32_t addis_3_13
= 0x3c6d0000;
2843 static const uint32_t b
= 0x48000000;
2844 static const uint32_t bcl_20_31
= 0x429f0005;
2845 static const uint32_t bctr
= 0x4e800420;
2846 static const uint32_t blr
= 0x4e800020;
2847 static const uint32_t blrl
= 0x4e800021;
2848 static const uint32_t bnectr_p4
= 0x4ce20420;
2849 static const uint32_t cmpldi_2_0
= 0x28220000;
2850 static const uint32_t cror_15_15_15
= 0x4def7b82;
2851 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2852 static const uint32_t ld_0_1
= 0xe8010000;
2853 static const uint32_t ld_0_12
= 0xe80c0000;
2854 static const uint32_t ld_11_12
= 0xe96c0000;
2855 static const uint32_t ld_11_2
= 0xe9620000;
2856 static const uint32_t ld_2_1
= 0xe8410000;
2857 static const uint32_t ld_2_11
= 0xe84b0000;
2858 static const uint32_t ld_2_12
= 0xe84c0000;
2859 static const uint32_t ld_2_2
= 0xe8420000;
2860 static const uint32_t lfd_0_1
= 0xc8010000;
2861 static const uint32_t li_0_0
= 0x38000000;
2862 static const uint32_t li_12_0
= 0x39800000;
2863 static const uint32_t lis_0_0
= 0x3c000000;
2864 static const uint32_t lis_11
= 0x3d600000;
2865 static const uint32_t lis_12
= 0x3d800000;
2866 static const uint32_t lwz_0_12
= 0x800c0000;
2867 static const uint32_t lwz_11_11
= 0x816b0000;
2868 static const uint32_t lwz_11_30
= 0x817e0000;
2869 static const uint32_t lwz_12_12
= 0x818c0000;
2870 static const uint32_t lwzu_0_12
= 0x840c0000;
2871 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2872 static const uint32_t mflr_0
= 0x7c0802a6;
2873 static const uint32_t mflr_11
= 0x7d6802a6;
2874 static const uint32_t mflr_12
= 0x7d8802a6;
2875 static const uint32_t mtctr_0
= 0x7c0903a6;
2876 static const uint32_t mtctr_11
= 0x7d6903a6;
2877 static const uint32_t mtctr_12
= 0x7d8903a6;
2878 static const uint32_t mtlr_0
= 0x7c0803a6;
2879 static const uint32_t mtlr_12
= 0x7d8803a6;
2880 static const uint32_t nop
= 0x60000000;
2881 static const uint32_t ori_0_0_0
= 0x60000000;
2882 static const uint32_t std_0_1
= 0xf8010000;
2883 static const uint32_t std_0_12
= 0xf80c0000;
2884 static const uint32_t std_2_1
= 0xf8410000;
2885 static const uint32_t stfd_0_1
= 0xd8010000;
2886 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2887 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2888 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2890 // Write out the PLT.
2892 template<int size
, bool big_endian
>
2894 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2896 if (size
== 32 && this->name_
[3] != 'I')
2898 const section_size_type offset
= this->offset();
2899 const section_size_type oview_size
2900 = convert_to_section_size_type(this->data_size());
2901 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2902 unsigned char* pov
= oview
;
2903 unsigned char* endpov
= oview
+ oview_size
;
2905 // The address of the .glink branch table
2906 const Output_data_glink
<size
, big_endian
>* glink
2907 = this->targ_
->glink_section();
2908 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2910 while (pov
< endpov
)
2912 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2917 of
->write_output_view(offset
, oview_size
, oview
);
2921 // Create the PLT section.
2923 template<int size
, bool big_endian
>
2925 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2928 if (this->plt_
== NULL
)
2930 if (this->got_
== NULL
)
2931 this->got_section(symtab
, layout
);
2933 if (this->glink_
== NULL
)
2934 make_glink_section(layout
);
2936 // Ensure that .rela.dyn always appears before .rela.plt This is
2937 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2938 // needs to include .rela.plt in its range.
2939 this->rela_dyn_section(layout
);
2941 Reloc_section
* plt_rel
= new Reloc_section(false);
2942 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2943 elfcpp::SHF_ALLOC
, plt_rel
,
2944 ORDER_DYNAMIC_PLT_RELOCS
, false);
2946 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2947 size
== 32 ? 0 : 24,
2949 layout
->add_output_section_data(".plt",
2951 ? elfcpp::SHT_PROGBITS
2952 : elfcpp::SHT_NOBITS
),
2953 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2962 // Create the IPLT section.
2964 template<int size
, bool big_endian
>
2966 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2969 if (this->iplt_
== NULL
)
2971 this->make_plt_section(symtab
, layout
);
2973 Reloc_section
* iplt_rel
= new Reloc_section(false);
2974 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2976 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2978 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2982 // A section for huge long branch addresses, similar to plt section.
2984 template<int size
, bool big_endian
>
2985 class Output_data_brlt_powerpc
: public Output_section_data_build
2988 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2989 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2990 size
, big_endian
> Reloc_section
;
2992 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2993 Reloc_section
* brlt_rel
)
2994 : Output_section_data_build(size
== 32 ? 4 : 8),
3002 this->reset_data_size();
3003 this->rel_
->reset_data_size();
3007 finalize_brlt_sizes()
3009 this->finalize_data_size();
3010 this->rel_
->finalize_data_size();
3013 // Add a reloc for an entry in the BRLT.
3015 add_reloc(Address to
, unsigned int off
)
3016 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3018 // Update section and reloc section size.
3020 set_current_size(unsigned int num_branches
)
3022 this->reset_address_and_file_offset();
3023 this->set_current_data_size(num_branches
* 16);
3024 this->finalize_data_size();
3025 Output_section
* os
= this->output_section();
3026 os
->set_section_offsets_need_adjustment();
3027 if (this->rel_
!= NULL
)
3029 unsigned int reloc_size
3030 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3031 this->rel_
->reset_address_and_file_offset();
3032 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3033 this->rel_
->finalize_data_size();
3034 Output_section
* os
= this->rel_
->output_section();
3035 os
->set_section_offsets_need_adjustment();
3041 do_adjust_output_section(Output_section
* os
)
3046 // Write to a map file.
3048 do_print_to_mapfile(Mapfile
* mapfile
) const
3049 { mapfile
->print_output_data(this, "** BRLT"); }
3052 // Write out the BRLT data.
3054 do_write(Output_file
*);
3056 // The reloc section.
3057 Reloc_section
* rel_
;
3058 Target_powerpc
<size
, big_endian
>* targ_
;
3061 // Make the branch lookup table section.
3063 template<int size
, bool big_endian
>
3065 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3067 if (size
== 64 && this->brlt_section_
== NULL
)
3069 Reloc_section
* brlt_rel
= NULL
;
3070 bool is_pic
= parameters
->options().output_is_position_independent();
3073 // When PIC we can't fill in .branch_lt (like .plt it can be
3074 // a bss style section) but must initialise at runtime via
3075 // dynamic relocats.
3076 this->rela_dyn_section(layout
);
3077 brlt_rel
= new Reloc_section(false);
3078 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3081 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3082 if (this->plt_
&& is_pic
)
3083 this->plt_
->output_section()
3084 ->add_output_section_data(this->brlt_section_
);
3086 layout
->add_output_section_data(".branch_lt",
3087 (is_pic
? elfcpp::SHT_NOBITS
3088 : elfcpp::SHT_PROGBITS
),
3089 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3090 this->brlt_section_
,
3091 (is_pic
? ORDER_SMALL_BSS
3092 : ORDER_SMALL_DATA
),
3097 // Write out .branch_lt when non-PIC.
3099 template<int size
, bool big_endian
>
3101 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3103 if (size
== 64 && !parameters
->options().output_is_position_independent())
3105 const section_size_type offset
= this->offset();
3106 const section_size_type oview_size
3107 = convert_to_section_size_type(this->data_size());
3108 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3110 this->targ_
->write_branch_lookup_table(oview
);
3111 of
->write_output_view(offset
, oview_size
, oview
);
3115 static inline uint32_t
3121 static inline uint32_t
3127 static inline uint32_t
3130 return hi(a
+ 0x8000);
3136 static const unsigned char eh_frame_cie
[12];
3140 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3143 'z', 'R', 0, // Augmentation string.
3144 4, // Code alignment.
3145 0x80 - size
/ 8 , // Data alignment.
3147 1, // Augmentation size.
3148 (elfcpp::DW_EH_PE_pcrel
3149 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3150 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3153 // Describe __glink_PLTresolve use of LR, 64-bit version.
3154 static const unsigned char glink_eh_frame_fde_64
[] =
3156 0, 0, 0, 0, // Replaced with offset to .glink.
3157 0, 0, 0, 0, // Replaced with size of .glink.
3158 0, // Augmentation size.
3159 elfcpp::DW_CFA_advance_loc
+ 1,
3160 elfcpp::DW_CFA_register
, 65, 12,
3161 elfcpp::DW_CFA_advance_loc
+ 4,
3162 elfcpp::DW_CFA_restore_extended
, 65
3165 // Describe __glink_PLTresolve use of LR, 32-bit version.
3166 static const unsigned char glink_eh_frame_fde_32
[] =
3168 0, 0, 0, 0, // Replaced with offset to .glink.
3169 0, 0, 0, 0, // Replaced with size of .glink.
3170 0, // Augmentation size.
3171 elfcpp::DW_CFA_advance_loc
+ 2,
3172 elfcpp::DW_CFA_register
, 65, 0,
3173 elfcpp::DW_CFA_advance_loc
+ 4,
3174 elfcpp::DW_CFA_restore_extended
, 65
3177 static const unsigned char default_fde
[] =
3179 0, 0, 0, 0, // Replaced with offset to stubs.
3180 0, 0, 0, 0, // Replaced with size of stubs.
3181 0, // Augmentation size.
3182 elfcpp::DW_CFA_nop
, // Pad.
3187 template<bool big_endian
>
3189 write_insn(unsigned char* p
, uint32_t v
)
3191 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3194 // Stub_table holds information about plt and long branch stubs.
3195 // Stubs are built in an area following some input section determined
3196 // by group_sections(). This input section is converted to a relaxed
3197 // input section allowing it to be resized to accommodate the stubs
3199 template<int size
, bool big_endian
>
3200 class Stub_table
: public Output_relaxed_input_section
3203 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3204 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3206 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
3207 : Output_relaxed_input_section(NULL
, 0, 0),
3208 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3209 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
3210 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3213 // Delayed Output_relaxed_input_section init.
3215 init(const Output_section::Input_section
*, Output_section
*);
3217 // Add a plt call stub.
3219 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3225 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3230 // Find a given plt call stub.
3232 find_plt_call_entry(const Symbol
*) const;
3235 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3236 unsigned int) const;
3239 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3245 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3250 // Add a long branch stub.
3252 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
3255 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3261 this->plt_call_stubs_
.clear();
3262 this->plt_size_
= 0;
3263 this->long_branch_stubs_
.clear();
3264 this->branch_size_
= 0;
3268 set_address_and_size(const Output_section
* os
, Address off
)
3270 Address start_off
= off
;
3271 off
+= this->orig_data_size_
;
3272 Address my_size
= this->plt_size_
+ this->branch_size_
;
3274 off
= align_address(off
, this->stub_align());
3275 // Include original section size and alignment padding in size
3276 my_size
+= off
- start_off
;
3277 this->reset_address_and_file_offset();
3278 this->set_current_data_size(my_size
);
3279 this->set_address_and_file_offset(os
->address() + start_off
,
3280 os
->offset() + start_off
);
3285 stub_address() const
3287 return align_address(this->address() + this->orig_data_size_
,
3288 this->stub_align());
3294 return align_address(this->offset() + this->orig_data_size_
,
3295 this->stub_align());
3300 { return this->plt_size_
; }
3305 Output_section
* os
= this->output_section();
3306 if (os
->addralign() < this->stub_align())
3308 os
->set_addralign(this->stub_align());
3309 // FIXME: get rid of the insane checkpointing.
3310 // We can't increase alignment of the input section to which
3311 // stubs are attached; The input section may be .init which
3312 // is pasted together with other .init sections to form a
3313 // function. Aligning might insert zero padding resulting in
3314 // sigill. However we do need to increase alignment of the
3315 // output section so that the align_address() on offset in
3316 // set_address_and_size() adds the same padding as the
3317 // align_address() on address in stub_address().
3318 // What's more, we need this alignment for the layout done in
3319 // relaxation_loop_body() so that the output section starts at
3320 // a suitably aligned address.
3321 os
->checkpoint_set_addralign(this->stub_align());
3323 if (this->last_plt_size_
!= this->plt_size_
3324 || this->last_branch_size_
!= this->branch_size_
)
3326 this->last_plt_size_
= this->plt_size_
;
3327 this->last_branch_size_
= this->branch_size_
;
3333 // Add .eh_frame info for this stub section. Unlike other linker
3334 // generated .eh_frame this is added late in the link, because we
3335 // only want the .eh_frame info if this particular stub section is
3338 add_eh_frame(Layout
* layout
)
3340 if (!this->eh_frame_added_
)
3342 if (!parameters
->options().ld_generated_unwind_info())
3345 // Since we add stub .eh_frame info late, it must be placed
3346 // after all other linker generated .eh_frame info so that
3347 // merge mapping need not be updated for input sections.
3348 // There is no provision to use a different CIE to that used
3350 if (!this->targ_
->has_glink())
3353 layout
->add_eh_frame_for_plt(this,
3354 Eh_cie
<size
>::eh_frame_cie
,
3355 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3357 sizeof (default_fde
));
3358 this->eh_frame_added_
= true;
3362 Target_powerpc
<size
, big_endian
>*
3368 class Plt_stub_ent_hash
;
3369 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3370 Plt_stub_ent_hash
> Plt_stub_entries
;
3372 // Alignment of stub section.
3378 unsigned int min_align
= 32;
3379 unsigned int user_align
= 1 << parameters
->options().plt_align();
3380 return std::max(user_align
, min_align
);
3383 // Return the plt offset for the given call stub.
3385 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3387 const Symbol
* gsym
= p
->first
.sym_
;
3390 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3391 && gsym
->can_use_relative_reloc(false));
3392 return gsym
->plt_offset();
3397 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3398 unsigned int local_sym_index
= p
->first
.locsym_
;
3399 return relobj
->local_plt_offset(local_sym_index
);
3403 // Size of a given plt call stub.
3405 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3411 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3413 plt_addr
+= this->targ_
->iplt_section()->address();
3415 plt_addr
+= this->targ_
->plt_section()->address();
3416 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3417 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3418 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3419 got_addr
+= ppcobj
->toc_base_offset();
3420 Address off
= plt_addr
- got_addr
;
3421 bool static_chain
= parameters
->options().plt_static_chain();
3422 bool thread_safe
= this->targ_
->plt_thread_safe();
3423 unsigned int bytes
= (4 * 5
3426 + 4 * (ha(off
) != 0)
3427 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3428 unsigned int align
= 1 << parameters
->options().plt_align();
3430 bytes
= (bytes
+ align
- 1) & -align
;
3434 // Return long branch stub size.
3436 branch_stub_size(Address to
)
3439 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3440 if (to
- loc
+ (1 << 25) < 2 << 25)
3442 if (size
== 64 || !parameters
->options().output_is_position_independent())
3449 do_write(Output_file
*);
3451 // Plt call stub keys.
3455 Plt_stub_ent(const Symbol
* sym
)
3456 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3459 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3460 unsigned int locsym_index
)
3461 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3464 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3466 unsigned int r_type
,
3468 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3471 this->addend_
= addend
;
3472 else if (parameters
->options().output_is_position_independent()
3473 && r_type
== elfcpp::R_PPC_PLTREL24
)
3475 this->addend_
= addend
;
3476 if (this->addend_
>= 32768)
3477 this->object_
= object
;
3481 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3482 unsigned int locsym_index
,
3483 unsigned int r_type
,
3485 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3488 this->addend_
= addend
;
3489 else if (parameters
->options().output_is_position_independent()
3490 && r_type
== elfcpp::R_PPC_PLTREL24
)
3491 this->addend_
= addend
;
3494 bool operator==(const Plt_stub_ent
& that
) const
3496 return (this->sym_
== that
.sym_
3497 && this->object_
== that
.object_
3498 && this->addend_
== that
.addend_
3499 && this->locsym_
== that
.locsym_
);
3503 const Sized_relobj_file
<size
, big_endian
>* object_
;
3504 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3505 unsigned int locsym_
;
3508 class Plt_stub_ent_hash
3511 size_t operator()(const Plt_stub_ent
& ent
) const
3513 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3514 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3520 // Long branch stub keys.
3521 class Branch_stub_ent
3524 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3525 : dest_(to
), toc_base_off_(0)
3528 toc_base_off_
= obj
->toc_base_offset();
3531 bool operator==(const Branch_stub_ent
& that
) const
3533 return (this->dest_
== that
.dest_
3535 || this->toc_base_off_
== that
.toc_base_off_
));
3539 unsigned int toc_base_off_
;
3542 class Branch_stub_ent_hash
3545 size_t operator()(const Branch_stub_ent
& ent
) const
3546 { return ent
.dest_
^ ent
.toc_base_off_
; }
3549 // In a sane world this would be a global.
3550 Target_powerpc
<size
, big_endian
>* targ_
;
3551 // Map sym/object/addend to stub offset.
3552 Plt_stub_entries plt_call_stubs_
;
3553 // Map destination address to stub offset.
3554 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3555 Branch_stub_ent_hash
> Branch_stub_entries
;
3556 Branch_stub_entries long_branch_stubs_
;
3557 // size of input section
3558 section_size_type orig_data_size_
;
3560 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3561 // Whether .eh_frame info has been created for this stub section.
3562 bool eh_frame_added_
;
3565 // Make a new stub table, and record.
3567 template<int size
, bool big_endian
>
3568 Stub_table
<size
, big_endian
>*
3569 Target_powerpc
<size
, big_endian
>::new_stub_table()
3571 Stub_table
<size
, big_endian
>* stub_table
3572 = new Stub_table
<size
, big_endian
>(this);
3573 this->stub_tables_
.push_back(stub_table
);
3577 // Delayed stub table initialisation, because we create the stub table
3578 // before we know to which section it will be attached.
3580 template<int size
, bool big_endian
>
3582 Stub_table
<size
, big_endian
>::init(
3583 const Output_section::Input_section
* owner
,
3584 Output_section
* output_section
)
3586 this->set_relobj(owner
->relobj());
3587 this->set_shndx(owner
->shndx());
3588 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3589 this->set_output_section(output_section
);
3590 this->orig_data_size_
= owner
->current_data_size();
3592 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3593 new_relaxed
.push_back(this);
3594 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3597 // Add a plt call stub, if we do not already have one for this
3598 // sym/object/addend combo.
3600 template<int size
, bool big_endian
>
3602 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3603 const Sized_relobj_file
<size
, big_endian
>* object
,
3605 unsigned int r_type
,
3608 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3609 Address off
= this->plt_size_
;
3610 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3611 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3613 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3616 template<int size
, bool big_endian
>
3618 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3619 const Sized_relobj_file
<size
, big_endian
>* object
,
3620 unsigned int locsym_index
,
3621 unsigned int r_type
,
3624 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3625 Address off
= this->plt_size_
;
3626 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3627 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3629 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3632 // Find a plt call stub.
3634 template<int size
, bool big_endian
>
3635 typename Stub_table
<size
, big_endian
>::Address
3636 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3637 const Sized_relobj_file
<size
, big_endian
>* object
,
3639 unsigned int r_type
,
3640 Address addend
) const
3642 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3643 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3644 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3647 template<int size
, bool big_endian
>
3648 typename Stub_table
<size
, big_endian
>::Address
3649 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3651 Plt_stub_ent
ent(gsym
);
3652 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3653 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3656 template<int size
, bool big_endian
>
3657 typename Stub_table
<size
, big_endian
>::Address
3658 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3659 const Sized_relobj_file
<size
, big_endian
>* object
,
3660 unsigned int locsym_index
,
3661 unsigned int r_type
,
3662 Address addend
) const
3664 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3665 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3666 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3669 template<int size
, bool big_endian
>
3670 typename Stub_table
<size
, big_endian
>::Address
3671 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3672 const Sized_relobj_file
<size
, big_endian
>* object
,
3673 unsigned int locsym_index
) const
3675 Plt_stub_ent
ent(object
, locsym_index
);
3676 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3677 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3680 // Add a long branch stub if we don't already have one to given
3683 template<int size
, bool big_endian
>
3685 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3686 const Powerpc_relobj
<size
, big_endian
>* object
,
3689 Branch_stub_ent
ent(object
, to
);
3690 Address off
= this->branch_size_
;
3691 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3693 unsigned int stub_size
= this->branch_stub_size(to
);
3694 this->branch_size_
= off
+ stub_size
;
3695 if (size
== 64 && stub_size
!= 4)
3696 this->targ_
->add_branch_lookup_table(to
);
3700 // Find long branch stub.
3702 template<int size
, bool big_endian
>
3703 typename Stub_table
<size
, big_endian
>::Address
3704 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3705 const Powerpc_relobj
<size
, big_endian
>* object
,
3708 Branch_stub_ent
ent(object
, to
);
3709 typename
Branch_stub_entries::const_iterator p
3710 = this->long_branch_stubs_
.find(ent
);
3711 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3714 // A class to handle .glink.
3716 template<int size
, bool big_endian
>
3717 class Output_data_glink
: public Output_section_data
3720 static const int pltresolve_size
= 16*4;
3722 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3723 : Output_section_data(16), targ_(targ
)
3727 add_eh_frame(Layout
* layout
)
3729 if (!parameters
->options().ld_generated_unwind_info())
3733 layout
->add_eh_frame_for_plt(this,
3734 Eh_cie
<64>::eh_frame_cie
,
3735 sizeof (Eh_cie
<64>::eh_frame_cie
),
3736 glink_eh_frame_fde_64
,
3737 sizeof (glink_eh_frame_fde_64
));
3740 // 32-bit .glink can use the default since the CIE return
3741 // address reg, LR, is valid.
3742 layout
->add_eh_frame_for_plt(this,
3743 Eh_cie
<32>::eh_frame_cie
,
3744 sizeof (Eh_cie
<32>::eh_frame_cie
),
3746 sizeof (default_fde
));
3747 // Except where LR is used in a PIC __glink_PLTresolve.
3748 if (parameters
->options().output_is_position_independent())
3749 layout
->add_eh_frame_for_plt(this,
3750 Eh_cie
<32>::eh_frame_cie
,
3751 sizeof (Eh_cie
<32>::eh_frame_cie
),
3752 glink_eh_frame_fde_32
,
3753 sizeof (glink_eh_frame_fde_32
));
3758 // Write to a map file.
3760 do_print_to_mapfile(Mapfile
* mapfile
) const
3761 { mapfile
->print_output_data(this, _("** glink")); }
3765 set_final_data_size();
3769 do_write(Output_file
*);
3771 // Allows access to .got and .plt for do_write.
3772 Target_powerpc
<size
, big_endian
>* targ_
;
3775 template<int size
, bool big_endian
>
3777 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3779 unsigned int count
= this->targ_
->plt_entry_count();
3780 section_size_type total
= 0;
3786 // space for branch table
3787 total
+= 4 * (count
- 1);
3789 total
+= -total
& 15;
3790 total
+= this->pltresolve_size
;
3794 total
+= this->pltresolve_size
;
3796 // space for branch table
3799 total
+= 4 * (count
- 0x8000);
3803 this->set_data_size(total
);
3806 // Write out plt and long branch stub code.
3808 template<int size
, bool big_endian
>
3810 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3812 if (this->plt_call_stubs_
.empty()
3813 && this->long_branch_stubs_
.empty())
3816 const section_size_type start_off
= this->offset();
3817 const section_size_type off
= this->stub_offset();
3818 const section_size_type oview_size
=
3819 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3820 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3825 const Output_data_got_powerpc
<size
, big_endian
>* got
3826 = this->targ_
->got_section();
3827 Address got_os_addr
= got
->output_section()->address();
3829 if (!this->plt_call_stubs_
.empty())
3831 // The base address of the .plt section.
3832 Address plt_base
= this->targ_
->plt_section()->address();
3833 Address iplt_base
= invalid_address
;
3835 // Write out plt call stubs.
3836 typename
Plt_stub_entries::const_iterator cs
;
3837 for (cs
= this->plt_call_stubs_
.begin();
3838 cs
!= this->plt_call_stubs_
.end();
3842 Address pltoff
= this->plt_off(cs
, &is_iplt
);
3843 Address plt_addr
= pltoff
;
3846 if (iplt_base
== invalid_address
)
3847 iplt_base
= this->targ_
->iplt_section()->address();
3848 plt_addr
+= iplt_base
;
3851 plt_addr
+= plt_base
;
3852 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3853 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3854 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3855 Address off
= plt_addr
- got_addr
;
3857 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3858 gold_error(_("%s: linkage table error against `%s'"),
3859 cs
->first
.object_
->name().c_str(),
3860 cs
->first
.sym_
->demangled_name().c_str());
3862 bool static_chain
= parameters
->options().plt_static_chain();
3863 bool thread_safe
= this->targ_
->plt_thread_safe();
3864 bool use_fake_dep
= false;
3865 Address cmp_branch_off
= 0;
3868 unsigned int pltindex
3869 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3870 / this->targ_
->plt_entry_size());
3872 = (this->targ_
->glink_section()->pltresolve_size
3874 if (pltindex
> 32768)
3875 glinkoff
+= (pltindex
- 32768) * 4;
3877 = this->targ_
->glink_section()->address() + glinkoff
;
3879 = (this->stub_address() + cs
->second
+ 24
3880 + 4 * (ha(off
) != 0)
3881 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3882 + 4 * static_chain
);
3883 cmp_branch_off
= to
- from
;
3884 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3887 p
= oview
+ cs
->second
;
3890 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3891 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3892 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3893 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3895 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3898 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3901 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3902 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3904 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3906 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3910 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3911 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3912 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3914 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3917 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3920 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3921 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3924 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3925 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3927 if (thread_safe
&& !use_fake_dep
)
3929 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3930 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3931 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3934 write_insn
<big_endian
>(p
, bctr
);
3938 // Write out long branch stubs.
3939 typename
Branch_stub_entries::const_iterator bs
;
3940 for (bs
= this->long_branch_stubs_
.begin();
3941 bs
!= this->long_branch_stubs_
.end();
3944 p
= oview
+ this->plt_size_
+ bs
->second
;
3945 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3946 Address delta
= bs
->first
.dest_
- loc
;
3947 if (delta
+ (1 << 25) < 2 << 25)
3948 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3952 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3953 gold_assert(brlt_addr
!= invalid_address
);
3954 brlt_addr
+= this->targ_
->brlt_section()->address();
3955 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3956 Address brltoff
= brlt_addr
- got_addr
;
3957 if (ha(brltoff
) == 0)
3959 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3963 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3964 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3966 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3967 write_insn
<big_endian
>(p
, bctr
);
3973 if (!this->plt_call_stubs_
.empty())
3975 // The base address of the .plt section.
3976 Address plt_base
= this->targ_
->plt_section()->address();
3977 Address iplt_base
= invalid_address
;
3978 // The address of _GLOBAL_OFFSET_TABLE_.
3979 Address g_o_t
= invalid_address
;
3981 // Write out plt call stubs.
3982 typename
Plt_stub_entries::const_iterator cs
;
3983 for (cs
= this->plt_call_stubs_
.begin();
3984 cs
!= this->plt_call_stubs_
.end();
3988 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
3991 if (iplt_base
== invalid_address
)
3992 iplt_base
= this->targ_
->iplt_section()->address();
3993 plt_addr
+= iplt_base
;
3996 plt_addr
+= plt_base
;
3998 p
= oview
+ cs
->second
;
3999 if (parameters
->options().output_is_position_independent())
4002 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4003 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4004 (cs
->first
.object_
));
4005 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4007 unsigned int got2
= ppcobj
->got2_shndx();
4008 got_addr
= ppcobj
->get_output_section_offset(got2
);
4009 gold_assert(got_addr
!= invalid_address
);
4010 got_addr
+= (ppcobj
->output_section(got2
)->address()
4011 + cs
->first
.addend_
);
4015 if (g_o_t
== invalid_address
)
4017 const Output_data_got_powerpc
<size
, big_endian
>* got
4018 = this->targ_
->got_section();
4019 g_o_t
= got
->address() + got
->g_o_t();
4024 Address off
= plt_addr
- got_addr
;
4027 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4028 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4029 write_insn
<big_endian
>(p
+ 8, bctr
);
4033 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4034 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4035 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4036 write_insn
<big_endian
>(p
+ 12, bctr
);
4041 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4042 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4043 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4044 write_insn
<big_endian
>(p
+ 12, bctr
);
4049 // Write out long branch stubs.
4050 typename
Branch_stub_entries::const_iterator bs
;
4051 for (bs
= this->long_branch_stubs_
.begin();
4052 bs
!= this->long_branch_stubs_
.end();
4055 p
= oview
+ this->plt_size_
+ bs
->second
;
4056 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4057 Address delta
= bs
->first
.dest_
- loc
;
4058 if (delta
+ (1 << 25) < 2 << 25)
4059 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4060 else if (!parameters
->options().output_is_position_independent())
4062 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4063 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4064 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4065 write_insn
<big_endian
>(p
+ 12, bctr
);
4070 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4071 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4072 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4073 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4074 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4075 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4076 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4077 write_insn
<big_endian
>(p
+ 28, bctr
);
4083 // Write out .glink.
4085 template<int size
, bool big_endian
>
4087 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4089 const section_size_type off
= this->offset();
4090 const section_size_type oview_size
=
4091 convert_to_section_size_type(this->data_size());
4092 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4095 // The base address of the .plt section.
4096 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4097 Address plt_base
= this->targ_
->plt_section()->address();
4101 // Write pltresolve stub.
4103 Address after_bcl
= this->address() + 16;
4104 Address pltoff
= plt_base
- after_bcl
;
4106 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4108 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4109 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4110 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4111 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4112 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4113 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
4114 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
4115 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
4116 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
4117 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
4118 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4119 while (p
< oview
+ this->pltresolve_size
)
4120 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4122 // Write lazy link call stubs.
4124 while (p
< oview
+ oview_size
)
4128 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4132 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
4133 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4135 uint32_t branch_off
= 8 - (p
- oview
);
4136 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4142 const Output_data_got_powerpc
<size
, big_endian
>* got
4143 = this->targ_
->got_section();
4144 // The address of _GLOBAL_OFFSET_TABLE_.
4145 Address g_o_t
= got
->address() + got
->g_o_t();
4147 // Write out pltresolve branch table.
4149 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4150 unsigned char* end_p
= oview
+ the_end
;
4151 while (p
< end_p
- 8 * 4)
4152 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4154 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4156 // Write out pltresolve call stub.
4157 if (parameters
->options().output_is_position_independent())
4159 Address res0_off
= 0;
4160 Address after_bcl_off
= the_end
+ 12;
4161 Address bcl_res0
= after_bcl_off
- res0_off
;
4163 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4164 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4165 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4166 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4167 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4168 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4169 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4171 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4173 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4174 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4176 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4177 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4181 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4182 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4184 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4185 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4186 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4187 write_insn
<big_endian
>(p
+ 52, bctr
);
4188 write_insn
<big_endian
>(p
+ 56, nop
);
4189 write_insn
<big_endian
>(p
+ 60, nop
);
4193 Address res0
= this->address();
4195 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4196 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4197 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4198 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4200 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4201 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4202 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4203 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4204 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4205 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4207 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4208 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4209 write_insn
<big_endian
>(p
+ 32, bctr
);
4210 write_insn
<big_endian
>(p
+ 36, nop
);
4211 write_insn
<big_endian
>(p
+ 40, nop
);
4212 write_insn
<big_endian
>(p
+ 44, nop
);
4213 write_insn
<big_endian
>(p
+ 48, nop
);
4214 write_insn
<big_endian
>(p
+ 52, nop
);
4215 write_insn
<big_endian
>(p
+ 56, nop
);
4216 write_insn
<big_endian
>(p
+ 60, nop
);
4221 of
->write_output_view(off
, oview_size
, oview
);
4225 // A class to handle linker generated save/restore functions.
4227 template<int size
, bool big_endian
>
4228 class Output_data_save_res
: public Output_section_data_build
4231 Output_data_save_res(Symbol_table
* symtab
);
4234 // Write to a map file.
4236 do_print_to_mapfile(Mapfile
* mapfile
) const
4237 { mapfile
->print_output_data(this, _("** save/restore")); }
4240 do_write(Output_file
*);
4243 // The maximum size of save/restore contents.
4244 static const unsigned int savres_max
= 218*4;
4247 savres_define(Symbol_table
* symtab
,
4249 unsigned int lo
, unsigned int hi
,
4250 unsigned char* write_ent(unsigned char*, int),
4251 unsigned char* write_tail(unsigned char*, int));
4253 unsigned char *contents_
;
4256 template<bool big_endian
>
4257 static unsigned char*
4258 savegpr0(unsigned char* p
, int r
)
4260 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4261 write_insn
<big_endian
>(p
, insn
);
4265 template<bool big_endian
>
4266 static unsigned char*
4267 savegpr0_tail(unsigned char* p
, int r
)
4269 p
= savegpr0
<big_endian
>(p
, r
);
4270 uint32_t insn
= std_0_1
+ 16;
4271 write_insn
<big_endian
>(p
, insn
);
4273 write_insn
<big_endian
>(p
, blr
);
4277 template<bool big_endian
>
4278 static unsigned char*
4279 restgpr0(unsigned char* p
, int r
)
4281 uint32_t insn
= ld_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 restgpr0_tail(unsigned char* p
, int r
)
4290 uint32_t insn
= ld_0_1
+ 16;
4291 write_insn
<big_endian
>(p
, insn
);
4293 p
= restgpr0
<big_endian
>(p
, r
);
4294 write_insn
<big_endian
>(p
, mtlr_0
);
4298 p
= restgpr0
<big_endian
>(p
, 30);
4299 p
= restgpr0
<big_endian
>(p
, 31);
4301 write_insn
<big_endian
>(p
, blr
);
4305 template<bool big_endian
>
4306 static unsigned char*
4307 savegpr1(unsigned char* p
, int r
)
4309 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4310 write_insn
<big_endian
>(p
, insn
);
4314 template<bool big_endian
>
4315 static unsigned char*
4316 savegpr1_tail(unsigned char* p
, int r
)
4318 p
= savegpr1
<big_endian
>(p
, r
);
4319 write_insn
<big_endian
>(p
, blr
);
4323 template<bool big_endian
>
4324 static unsigned char*
4325 restgpr1(unsigned char* p
, int r
)
4327 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4328 write_insn
<big_endian
>(p
, insn
);
4332 template<bool big_endian
>
4333 static unsigned char*
4334 restgpr1_tail(unsigned char* p
, int r
)
4336 p
= restgpr1
<big_endian
>(p
, r
);
4337 write_insn
<big_endian
>(p
, blr
);
4341 template<bool big_endian
>
4342 static unsigned char*
4343 savefpr(unsigned char* p
, int r
)
4345 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4346 write_insn
<big_endian
>(p
, insn
);
4350 template<bool big_endian
>
4351 static unsigned char*
4352 savefpr0_tail(unsigned char* p
, int r
)
4354 p
= savefpr
<big_endian
>(p
, r
);
4355 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4357 write_insn
<big_endian
>(p
, blr
);
4361 template<bool big_endian
>
4362 static unsigned char*
4363 restfpr(unsigned char* p
, int r
)
4365 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4366 write_insn
<big_endian
>(p
, insn
);
4370 template<bool big_endian
>
4371 static unsigned char*
4372 restfpr0_tail(unsigned char* p
, int r
)
4374 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4376 p
= restfpr
<big_endian
>(p
, r
);
4377 write_insn
<big_endian
>(p
, mtlr_0
);
4381 p
= restfpr
<big_endian
>(p
, 30);
4382 p
= restfpr
<big_endian
>(p
, 31);
4384 write_insn
<big_endian
>(p
, blr
);
4388 template<bool big_endian
>
4389 static unsigned char*
4390 savefpr1_tail(unsigned char* p
, int r
)
4392 p
= savefpr
<big_endian
>(p
, r
);
4393 write_insn
<big_endian
>(p
, blr
);
4397 template<bool big_endian
>
4398 static unsigned char*
4399 restfpr1_tail(unsigned char* p
, int r
)
4401 p
= restfpr
<big_endian
>(p
, r
);
4402 write_insn
<big_endian
>(p
, blr
);
4406 template<bool big_endian
>
4407 static unsigned char*
4408 savevr(unsigned char* p
, int r
)
4410 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4411 write_insn
<big_endian
>(p
, insn
);
4413 insn
= stvx_0_12_0
+ (r
<< 21);
4414 write_insn
<big_endian
>(p
, insn
);
4418 template<bool big_endian
>
4419 static unsigned char*
4420 savevr_tail(unsigned char* p
, int r
)
4422 p
= savevr
<big_endian
>(p
, r
);
4423 write_insn
<big_endian
>(p
, blr
);
4427 template<bool big_endian
>
4428 static unsigned char*
4429 restvr(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
= lvx_0_12_0
+ (r
<< 21);
4435 write_insn
<big_endian
>(p
, insn
);
4439 template<bool big_endian
>
4440 static unsigned char*
4441 restvr_tail(unsigned char* p
, int r
)
4443 p
= restvr
<big_endian
>(p
, r
);
4444 write_insn
<big_endian
>(p
, blr
);
4449 template<int size
, bool big_endian
>
4450 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
4451 Symbol_table
* symtab
)
4452 : Output_section_data_build(4),
4455 this->savres_define(symtab
,
4456 "_savegpr0_", 14, 31,
4457 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
4458 this->savres_define(symtab
,
4459 "_restgpr0_", 14, 29,
4460 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4461 this->savres_define(symtab
,
4462 "_restgpr0_", 30, 31,
4463 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4464 this->savres_define(symtab
,
4465 "_savegpr1_", 14, 31,
4466 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
4467 this->savres_define(symtab
,
4468 "_restgpr1_", 14, 31,
4469 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4470 this->savres_define(symtab
,
4471 "_savefpr_", 14, 31,
4472 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4473 this->savres_define(symtab
,
4474 "_restfpr_", 14, 29,
4475 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4476 this->savres_define(symtab
,
4477 "_restfpr_", 30, 31,
4478 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4479 this->savres_define(symtab
,
4481 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4482 this->savres_define(symtab
,
4484 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4485 this->savres_define(symtab
,
4487 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4488 this->savres_define(symtab
,
4490 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4493 template<int size
, bool big_endian
>
4495 Output_data_save_res
<size
, big_endian
>::savres_define(
4496 Symbol_table
* symtab
,
4498 unsigned int lo
, unsigned int hi
,
4499 unsigned char* write_ent(unsigned char*, int),
4500 unsigned char* write_tail(unsigned char*, int))
4502 size_t len
= strlen(name
);
4503 bool writing
= false;
4506 memcpy(sym
, name
, len
);
4509 for (unsigned int i
= lo
; i
<= hi
; i
++)
4511 sym
[len
+ 0] = i
/ 10 + '0';
4512 sym
[len
+ 1] = i
% 10 + '0';
4513 Symbol
* gsym
= symtab
->lookup(sym
);
4514 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4515 writing
= writing
|| refd
;
4518 if (this->contents_
== NULL
)
4519 this->contents_
= new unsigned char[this->savres_max
];
4521 section_size_type value
= this->current_data_size();
4522 unsigned char* p
= this->contents_
+ value
;
4524 p
= write_ent(p
, i
);
4526 p
= write_tail(p
, i
);
4527 section_size_type cur_size
= p
- this->contents_
;
4528 this->set_current_data_size(cur_size
);
4530 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4531 this, value
, cur_size
- value
,
4532 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4533 elfcpp::STV_HIDDEN
, 0, false, false);
4538 // Write out save/restore.
4540 template<int size
, bool big_endian
>
4542 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4544 const section_size_type off
= this->offset();
4545 const section_size_type oview_size
=
4546 convert_to_section_size_type(this->data_size());
4547 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4548 memcpy(oview
, this->contents_
, oview_size
);
4549 of
->write_output_view(off
, oview_size
, oview
);
4553 // Create the glink section.
4555 template<int size
, bool big_endian
>
4557 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4559 if (this->glink_
== NULL
)
4561 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4562 this->glink_
->add_eh_frame(layout
);
4563 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4564 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4565 this->glink_
, ORDER_TEXT
, false);
4569 // Create a PLT entry for a global symbol.
4571 template<int size
, bool big_endian
>
4573 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4577 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4578 && gsym
->can_use_relative_reloc(false))
4580 if (this->iplt_
== NULL
)
4581 this->make_iplt_section(symtab
, layout
);
4582 this->iplt_
->add_ifunc_entry(gsym
);
4586 if (this->plt_
== NULL
)
4587 this->make_plt_section(symtab
, layout
);
4588 this->plt_
->add_entry(gsym
);
4592 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4594 template<int size
, bool big_endian
>
4596 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4597 Symbol_table
* symtab
,
4599 Sized_relobj_file
<size
, big_endian
>* relobj
,
4602 if (this->iplt_
== NULL
)
4603 this->make_iplt_section(symtab
, layout
);
4604 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4607 // Return the number of entries in the PLT.
4609 template<int size
, bool big_endian
>
4611 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4613 if (this->plt_
== NULL
)
4615 return this->plt_
->entry_count();
4618 // Return the offset of the first non-reserved PLT entry.
4620 template<int size
, bool big_endian
>
4622 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4624 return this->plt_
->first_plt_entry_offset();
4627 // Return the size of each PLT entry.
4629 template<int size
, bool big_endian
>
4631 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4633 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4636 // Create a GOT entry for local dynamic __tls_get_addr calls.
4638 template<int size
, bool big_endian
>
4640 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4641 Symbol_table
* symtab
,
4643 Sized_relobj_file
<size
, big_endian
>* object
)
4645 if (this->tlsld_got_offset_
== -1U)
4647 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4648 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4649 Output_data_got_powerpc
<size
, big_endian
>* got
4650 = this->got_section(symtab
, layout
);
4651 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4652 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4654 this->tlsld_got_offset_
= got_offset
;
4656 return this->tlsld_got_offset_
;
4659 // Get the Reference_flags for a particular relocation.
4661 template<int size
, bool big_endian
>
4663 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4667 case elfcpp::R_POWERPC_NONE
:
4668 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4669 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4670 case elfcpp::R_PPC64_TOC
:
4671 // No symbol reference.
4674 case elfcpp::R_PPC64_ADDR64
:
4675 case elfcpp::R_PPC64_UADDR64
:
4676 case elfcpp::R_POWERPC_ADDR32
:
4677 case elfcpp::R_POWERPC_UADDR32
:
4678 case elfcpp::R_POWERPC_ADDR16
:
4679 case elfcpp::R_POWERPC_UADDR16
:
4680 case elfcpp::R_POWERPC_ADDR16_LO
:
4681 case elfcpp::R_POWERPC_ADDR16_HI
:
4682 case elfcpp::R_POWERPC_ADDR16_HA
:
4683 return Symbol::ABSOLUTE_REF
;
4685 case elfcpp::R_POWERPC_ADDR24
:
4686 case elfcpp::R_POWERPC_ADDR14
:
4687 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4688 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4689 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4691 case elfcpp::R_PPC64_REL64
:
4692 case elfcpp::R_POWERPC_REL32
:
4693 case elfcpp::R_PPC_LOCAL24PC
:
4694 case elfcpp::R_POWERPC_REL16
:
4695 case elfcpp::R_POWERPC_REL16_LO
:
4696 case elfcpp::R_POWERPC_REL16_HI
:
4697 case elfcpp::R_POWERPC_REL16_HA
:
4698 return Symbol::RELATIVE_REF
;
4700 case elfcpp::R_POWERPC_REL24
:
4701 case elfcpp::R_PPC_PLTREL24
:
4702 case elfcpp::R_POWERPC_REL14
:
4703 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4704 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4705 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4707 case elfcpp::R_POWERPC_GOT16
:
4708 case elfcpp::R_POWERPC_GOT16_LO
:
4709 case elfcpp::R_POWERPC_GOT16_HI
:
4710 case elfcpp::R_POWERPC_GOT16_HA
:
4711 case elfcpp::R_PPC64_GOT16_DS
:
4712 case elfcpp::R_PPC64_GOT16_LO_DS
:
4713 case elfcpp::R_PPC64_TOC16
:
4714 case elfcpp::R_PPC64_TOC16_LO
:
4715 case elfcpp::R_PPC64_TOC16_HI
:
4716 case elfcpp::R_PPC64_TOC16_HA
:
4717 case elfcpp::R_PPC64_TOC16_DS
:
4718 case elfcpp::R_PPC64_TOC16_LO_DS
:
4720 return Symbol::ABSOLUTE_REF
;
4722 case elfcpp::R_POWERPC_GOT_TPREL16
:
4723 case elfcpp::R_POWERPC_TLS
:
4724 return Symbol::TLS_REF
;
4726 case elfcpp::R_POWERPC_COPY
:
4727 case elfcpp::R_POWERPC_GLOB_DAT
:
4728 case elfcpp::R_POWERPC_JMP_SLOT
:
4729 case elfcpp::R_POWERPC_RELATIVE
:
4730 case elfcpp::R_POWERPC_DTPMOD
:
4732 // Not expected. We will give an error later.
4737 // Report an unsupported relocation against a local symbol.
4739 template<int size
, bool big_endian
>
4741 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4742 Sized_relobj_file
<size
, big_endian
>* object
,
4743 unsigned int r_type
)
4745 gold_error(_("%s: unsupported reloc %u against local symbol"),
4746 object
->name().c_str(), r_type
);
4749 // We are about to emit a dynamic relocation of type R_TYPE. If the
4750 // dynamic linker does not support it, issue an error.
4752 template<int size
, bool big_endian
>
4754 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4755 unsigned int r_type
)
4757 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4759 // These are the relocation types supported by glibc for both 32-bit
4760 // and 64-bit powerpc.
4763 case elfcpp::R_POWERPC_NONE
:
4764 case elfcpp::R_POWERPC_RELATIVE
:
4765 case elfcpp::R_POWERPC_GLOB_DAT
:
4766 case elfcpp::R_POWERPC_DTPMOD
:
4767 case elfcpp::R_POWERPC_DTPREL
:
4768 case elfcpp::R_POWERPC_TPREL
:
4769 case elfcpp::R_POWERPC_JMP_SLOT
:
4770 case elfcpp::R_POWERPC_COPY
:
4771 case elfcpp::R_POWERPC_IRELATIVE
:
4772 case elfcpp::R_POWERPC_ADDR32
:
4773 case elfcpp::R_POWERPC_UADDR32
:
4774 case elfcpp::R_POWERPC_ADDR24
:
4775 case elfcpp::R_POWERPC_ADDR16
:
4776 case elfcpp::R_POWERPC_UADDR16
:
4777 case elfcpp::R_POWERPC_ADDR16_LO
:
4778 case elfcpp::R_POWERPC_ADDR16_HI
:
4779 case elfcpp::R_POWERPC_ADDR16_HA
:
4780 case elfcpp::R_POWERPC_ADDR14
:
4781 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4782 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4783 case elfcpp::R_POWERPC_REL32
:
4784 case elfcpp::R_POWERPC_REL24
:
4785 case elfcpp::R_POWERPC_TPREL16
:
4786 case elfcpp::R_POWERPC_TPREL16_LO
:
4787 case elfcpp::R_POWERPC_TPREL16_HI
:
4788 case elfcpp::R_POWERPC_TPREL16_HA
:
4799 // These are the relocation types supported only on 64-bit.
4800 case elfcpp::R_PPC64_ADDR64
:
4801 case elfcpp::R_PPC64_UADDR64
:
4802 case elfcpp::R_PPC64_JMP_IREL
:
4803 case elfcpp::R_PPC64_ADDR16_DS
:
4804 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4805 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4806 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4807 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4808 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4809 case elfcpp::R_PPC64_REL64
:
4810 case elfcpp::R_POWERPC_ADDR30
:
4811 case elfcpp::R_PPC64_TPREL16_DS
:
4812 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4813 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4814 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4815 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4816 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4827 // These are the relocation types supported only on 32-bit.
4828 // ??? glibc ld.so doesn't need to support these.
4829 case elfcpp::R_POWERPC_DTPREL16
:
4830 case elfcpp::R_POWERPC_DTPREL16_LO
:
4831 case elfcpp::R_POWERPC_DTPREL16_HI
:
4832 case elfcpp::R_POWERPC_DTPREL16_HA
:
4840 // This prevents us from issuing more than one error per reloc
4841 // section. But we can still wind up issuing more than one
4842 // error per object file.
4843 if (this->issued_non_pic_error_
)
4845 gold_assert(parameters
->options().output_is_position_independent());
4846 object
->error(_("requires unsupported dynamic reloc; "
4847 "recompile with -fPIC"));
4848 this->issued_non_pic_error_
= true;
4852 // Return whether we need to make a PLT entry for a relocation of the
4853 // given type against a STT_GNU_IFUNC symbol.
4855 template<int size
, bool big_endian
>
4857 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4858 Sized_relobj_file
<size
, big_endian
>* object
,
4859 unsigned int r_type
,
4862 // In non-pic code any reference will resolve to the plt call stub
4863 // for the ifunc symbol.
4864 if (size
== 32 && !parameters
->options().output_is_position_independent())
4869 // Word size refs from data sections are OK, but don't need a PLT entry.
4870 case elfcpp::R_POWERPC_ADDR32
:
4871 case elfcpp::R_POWERPC_UADDR32
:
4876 case elfcpp::R_PPC64_ADDR64
:
4877 case elfcpp::R_PPC64_UADDR64
:
4882 // GOT refs are good, but also don't need a PLT entry.
4883 case elfcpp::R_POWERPC_GOT16
:
4884 case elfcpp::R_POWERPC_GOT16_LO
:
4885 case elfcpp::R_POWERPC_GOT16_HI
:
4886 case elfcpp::R_POWERPC_GOT16_HA
:
4887 case elfcpp::R_PPC64_GOT16_DS
:
4888 case elfcpp::R_PPC64_GOT16_LO_DS
:
4891 // Function calls are good, and these do need a PLT entry.
4892 case elfcpp::R_POWERPC_ADDR24
:
4893 case elfcpp::R_POWERPC_ADDR14
:
4894 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4895 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4896 case elfcpp::R_POWERPC_REL24
:
4897 case elfcpp::R_PPC_PLTREL24
:
4898 case elfcpp::R_POWERPC_REL14
:
4899 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4900 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4907 // Anything else is a problem.
4908 // If we are building a static executable, the libc startup function
4909 // responsible for applying indirect function relocations is going
4910 // to complain about the reloc type.
4911 // If we are building a dynamic executable, we will have a text
4912 // relocation. The dynamic loader will set the text segment
4913 // writable and non-executable to apply text relocations. So we'll
4914 // segfault when trying to run the indirection function to resolve
4917 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4918 object
->name().c_str(), r_type
);
4922 // Scan a relocation for a local symbol.
4924 template<int size
, bool big_endian
>
4926 Target_powerpc
<size
, big_endian
>::Scan::local(
4927 Symbol_table
* symtab
,
4929 Target_powerpc
<size
, big_endian
>* target
,
4930 Sized_relobj_file
<size
, big_endian
>* object
,
4931 unsigned int data_shndx
,
4932 Output_section
* output_section
,
4933 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4934 unsigned int r_type
,
4935 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4938 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
4940 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4941 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4943 this->expect_tls_get_addr_call();
4944 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4945 if (tls_type
!= tls::TLSOPT_NONE
)
4946 this->skip_next_tls_get_addr_call();
4948 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4949 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4951 this->expect_tls_get_addr_call();
4952 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4953 if (tls_type
!= tls::TLSOPT_NONE
)
4954 this->skip_next_tls_get_addr_call();
4957 Powerpc_relobj
<size
, big_endian
>* ppc_object
4958 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4963 && data_shndx
== ppc_object
->opd_shndx()
4964 && r_type
== elfcpp::R_PPC64_ADDR64
)
4965 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4969 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4970 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4971 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
4973 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4974 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4975 r_type
, r_sym
, reloc
.get_r_addend());
4976 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4981 case elfcpp::R_POWERPC_NONE
:
4982 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4983 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4984 case elfcpp::R_PPC64_TOCSAVE
:
4985 case elfcpp::R_PPC_EMB_MRKREF
:
4986 case elfcpp::R_POWERPC_TLS
:
4989 case elfcpp::R_PPC64_TOC
:
4991 Output_data_got_powerpc
<size
, big_endian
>* got
4992 = target
->got_section(symtab
, layout
);
4993 if (parameters
->options().output_is_position_independent())
4995 Address off
= reloc
.get_r_offset();
4997 && data_shndx
== ppc_object
->opd_shndx()
4998 && ppc_object
->get_opd_discard(off
- 8))
5001 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5002 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5003 rela_dyn
->add_output_section_relative(got
->output_section(),
5004 elfcpp::R_POWERPC_RELATIVE
,
5006 object
, data_shndx
, off
,
5007 symobj
->toc_base_offset());
5012 case elfcpp::R_PPC64_ADDR64
:
5013 case elfcpp::R_PPC64_UADDR64
:
5014 case elfcpp::R_POWERPC_ADDR32
:
5015 case elfcpp::R_POWERPC_UADDR32
:
5016 case elfcpp::R_POWERPC_ADDR24
:
5017 case elfcpp::R_POWERPC_ADDR16
:
5018 case elfcpp::R_POWERPC_ADDR16_LO
:
5019 case elfcpp::R_POWERPC_ADDR16_HI
:
5020 case elfcpp::R_POWERPC_ADDR16_HA
:
5021 case elfcpp::R_POWERPC_UADDR16
:
5022 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5023 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5024 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5025 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5026 case elfcpp::R_PPC64_ADDR16_DS
:
5027 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5028 case elfcpp::R_POWERPC_ADDR14
:
5029 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5030 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5031 // If building a shared library (or a position-independent
5032 // executable), we need to create a dynamic relocation for
5034 if (parameters
->options().output_is_position_independent()
5035 || (size
== 64 && is_ifunc
))
5037 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5039 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5040 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5042 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5043 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5044 : elfcpp::R_POWERPC_RELATIVE
);
5045 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5046 output_section
, data_shndx
,
5047 reloc
.get_r_offset(),
5048 reloc
.get_r_addend(), false);
5052 check_non_pic(object
, r_type
);
5053 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5054 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5055 data_shndx
, reloc
.get_r_offset(),
5056 reloc
.get_r_addend());
5061 case elfcpp::R_POWERPC_REL24
:
5062 case elfcpp::R_PPC_PLTREL24
:
5063 case elfcpp::R_PPC_LOCAL24PC
:
5064 case elfcpp::R_POWERPC_REL14
:
5065 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5066 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5068 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5069 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5070 reloc
.get_r_addend());
5073 case elfcpp::R_PPC64_REL64
:
5074 case elfcpp::R_POWERPC_REL32
:
5075 case elfcpp::R_POWERPC_REL16
:
5076 case elfcpp::R_POWERPC_REL16_LO
:
5077 case elfcpp::R_POWERPC_REL16_HI
:
5078 case elfcpp::R_POWERPC_REL16_HA
:
5079 case elfcpp::R_POWERPC_SECTOFF
:
5080 case elfcpp::R_POWERPC_TPREL16
:
5081 case elfcpp::R_POWERPC_DTPREL16
:
5082 case elfcpp::R_POWERPC_SECTOFF_LO
:
5083 case elfcpp::R_POWERPC_TPREL16_LO
:
5084 case elfcpp::R_POWERPC_DTPREL16_LO
:
5085 case elfcpp::R_POWERPC_SECTOFF_HI
:
5086 case elfcpp::R_POWERPC_TPREL16_HI
:
5087 case elfcpp::R_POWERPC_DTPREL16_HI
:
5088 case elfcpp::R_POWERPC_SECTOFF_HA
:
5089 case elfcpp::R_POWERPC_TPREL16_HA
:
5090 case elfcpp::R_POWERPC_DTPREL16_HA
:
5091 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5092 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5093 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5094 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5095 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5096 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5097 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5098 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5099 case elfcpp::R_PPC64_TPREL16_DS
:
5100 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5101 case elfcpp::R_PPC64_DTPREL16_DS
:
5102 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5103 case elfcpp::R_PPC64_SECTOFF_DS
:
5104 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5105 case elfcpp::R_PPC64_TLSGD
:
5106 case elfcpp::R_PPC64_TLSLD
:
5109 case elfcpp::R_POWERPC_GOT16
:
5110 case elfcpp::R_POWERPC_GOT16_LO
:
5111 case elfcpp::R_POWERPC_GOT16_HI
:
5112 case elfcpp::R_POWERPC_GOT16_HA
:
5113 case elfcpp::R_PPC64_GOT16_DS
:
5114 case elfcpp::R_PPC64_GOT16_LO_DS
:
5116 // The symbol requires a GOT entry.
5117 Output_data_got_powerpc
<size
, big_endian
>* got
5118 = target
->got_section(symtab
, layout
);
5119 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5121 if (!parameters
->options().output_is_position_independent())
5123 if (size
== 32 && is_ifunc
)
5124 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5126 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5128 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5130 // If we are generating a shared object or a pie, this
5131 // symbol's GOT entry will be set by a dynamic relocation.
5133 off
= got
->add_constant(0);
5134 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5136 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5138 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5139 : elfcpp::R_POWERPC_RELATIVE
);
5140 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5141 got
, off
, 0, false);
5146 case elfcpp::R_PPC64_TOC16
:
5147 case elfcpp::R_PPC64_TOC16_LO
:
5148 case elfcpp::R_PPC64_TOC16_HI
:
5149 case elfcpp::R_PPC64_TOC16_HA
:
5150 case elfcpp::R_PPC64_TOC16_DS
:
5151 case elfcpp::R_PPC64_TOC16_LO_DS
:
5152 // We need a GOT section.
5153 target
->got_section(symtab
, layout
);
5156 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5157 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5158 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5159 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5161 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5162 if (tls_type
== tls::TLSOPT_NONE
)
5164 Output_data_got_powerpc
<size
, big_endian
>* got
5165 = target
->got_section(symtab
, layout
);
5166 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5167 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5168 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5169 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5171 else if (tls_type
== tls::TLSOPT_TO_LE
)
5173 // no GOT relocs needed for Local Exec.
5180 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5181 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5182 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5183 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5185 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5186 if (tls_type
== tls::TLSOPT_NONE
)
5187 target
->tlsld_got_offset(symtab
, layout
, object
);
5188 else if (tls_type
== tls::TLSOPT_TO_LE
)
5190 // no GOT relocs needed for Local Exec.
5191 if (parameters
->options().emit_relocs())
5193 Output_section
* os
= layout
->tls_segment()->first_section();
5194 gold_assert(os
!= NULL
);
5195 os
->set_needs_symtab_index();
5203 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5204 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5205 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5206 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5208 Output_data_got_powerpc
<size
, big_endian
>* got
5209 = target
->got_section(symtab
, layout
);
5210 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5211 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5215 case elfcpp::R_POWERPC_GOT_TPREL16
:
5216 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5217 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5218 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5220 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5221 if (tls_type
== tls::TLSOPT_NONE
)
5223 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5224 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5226 Output_data_got_powerpc
<size
, big_endian
>* got
5227 = target
->got_section(symtab
, layout
);
5228 unsigned int off
= got
->add_constant(0);
5229 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5231 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5232 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5233 elfcpp::R_POWERPC_TPREL
,
5237 else if (tls_type
== tls::TLSOPT_TO_LE
)
5239 // no GOT relocs needed for Local Exec.
5247 unsupported_reloc_local(object
, r_type
);
5253 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5254 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5255 case elfcpp::R_POWERPC_GOT_TPREL16
:
5256 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5257 case elfcpp::R_POWERPC_GOT16
:
5258 case elfcpp::R_PPC64_GOT16_DS
:
5259 case elfcpp::R_PPC64_TOC16
:
5260 case elfcpp::R_PPC64_TOC16_DS
:
5261 ppc_object
->set_has_small_toc_reloc();
5267 // Report an unsupported relocation against a global symbol.
5269 template<int size
, bool big_endian
>
5271 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5272 Sized_relobj_file
<size
, big_endian
>* object
,
5273 unsigned int r_type
,
5276 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5277 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5280 // Scan a relocation for a global symbol.
5282 template<int size
, bool big_endian
>
5284 Target_powerpc
<size
, big_endian
>::Scan::global(
5285 Symbol_table
* symtab
,
5287 Target_powerpc
<size
, big_endian
>* target
,
5288 Sized_relobj_file
<size
, big_endian
>* object
,
5289 unsigned int data_shndx
,
5290 Output_section
* output_section
,
5291 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5292 unsigned int r_type
,
5295 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5298 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5299 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5301 this->expect_tls_get_addr_call();
5302 const bool final
= gsym
->final_value_is_known();
5303 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5304 if (tls_type
!= tls::TLSOPT_NONE
)
5305 this->skip_next_tls_get_addr_call();
5307 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5308 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5310 this->expect_tls_get_addr_call();
5311 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5312 if (tls_type
!= tls::TLSOPT_NONE
)
5313 this->skip_next_tls_get_addr_call();
5316 Powerpc_relobj
<size
, big_endian
>* ppc_object
5317 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5319 // A STT_GNU_IFUNC symbol may require a PLT entry.
5320 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5321 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
5323 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5324 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5325 reloc
.get_r_addend());
5326 target
->make_plt_entry(symtab
, layout
, gsym
);
5331 case elfcpp::R_POWERPC_NONE
:
5332 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5333 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5334 case elfcpp::R_PPC_LOCAL24PC
:
5335 case elfcpp::R_PPC_EMB_MRKREF
:
5336 case elfcpp::R_POWERPC_TLS
:
5339 case elfcpp::R_PPC64_TOC
:
5341 Output_data_got_powerpc
<size
, big_endian
>* got
5342 = target
->got_section(symtab
, layout
);
5343 if (parameters
->options().output_is_position_independent())
5345 Address off
= reloc
.get_r_offset();
5347 && data_shndx
== ppc_object
->opd_shndx()
5348 && ppc_object
->get_opd_discard(off
- 8))
5351 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5352 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5353 if (data_shndx
!= ppc_object
->opd_shndx())
5354 symobj
= static_cast
5355 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5356 rela_dyn
->add_output_section_relative(got
->output_section(),
5357 elfcpp::R_POWERPC_RELATIVE
,
5359 object
, data_shndx
, off
,
5360 symobj
->toc_base_offset());
5365 case elfcpp::R_PPC64_ADDR64
:
5367 && data_shndx
== ppc_object
->opd_shndx()
5368 && (gsym
->is_defined_in_discarded_section()
5369 || gsym
->object() != object
))
5371 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5375 case elfcpp::R_PPC64_UADDR64
:
5376 case elfcpp::R_POWERPC_ADDR32
:
5377 case elfcpp::R_POWERPC_UADDR32
:
5378 case elfcpp::R_POWERPC_ADDR24
:
5379 case elfcpp::R_POWERPC_ADDR16
:
5380 case elfcpp::R_POWERPC_ADDR16_LO
:
5381 case elfcpp::R_POWERPC_ADDR16_HI
:
5382 case elfcpp::R_POWERPC_ADDR16_HA
:
5383 case elfcpp::R_POWERPC_UADDR16
:
5384 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5385 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5386 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5387 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5388 case elfcpp::R_PPC64_ADDR16_DS
:
5389 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5390 case elfcpp::R_POWERPC_ADDR14
:
5391 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5392 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5394 // Make a PLT entry if necessary.
5395 if (gsym
->needs_plt_entry())
5399 target
->push_branch(ppc_object
, data_shndx
,
5400 reloc
.get_r_offset(), r_type
,
5401 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5402 reloc
.get_r_addend());
5403 target
->make_plt_entry(symtab
, layout
, gsym
);
5405 // Since this is not a PC-relative relocation, we may be
5406 // taking the address of a function. In that case we need to
5407 // set the entry in the dynamic symbol table to the address of
5408 // the PLT call stub.
5410 && gsym
->is_from_dynobj()
5411 && !parameters
->options().output_is_position_independent())
5412 gsym
->set_needs_dynsym_value();
5414 // Make a dynamic relocation if necessary.
5415 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5416 || (size
== 64 && is_ifunc
))
5418 if (gsym
->may_need_copy_reloc())
5420 target
->copy_reloc(symtab
, layout
, object
,
5421 data_shndx
, output_section
, gsym
, reloc
);
5423 else if ((size
== 32
5424 && r_type
== elfcpp::R_POWERPC_ADDR32
5425 && gsym
->can_use_relative_reloc(false)
5426 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
5427 && parameters
->options().shared()))
5429 && r_type
== elfcpp::R_PPC64_ADDR64
5430 && (gsym
->can_use_relative_reloc(false)
5431 || data_shndx
== ppc_object
->opd_shndx())))
5433 Reloc_section
* rela_dyn
5434 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5435 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5436 : elfcpp::R_POWERPC_RELATIVE
);
5437 rela_dyn
->add_symbolless_global_addend(
5438 gsym
, dynrel
, output_section
, object
, data_shndx
,
5439 reloc
.get_r_offset(), reloc
.get_r_addend());
5443 Reloc_section
* rela_dyn
5444 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5445 check_non_pic(object
, r_type
);
5446 rela_dyn
->add_global(gsym
, r_type
, output_section
,
5448 reloc
.get_r_offset(),
5449 reloc
.get_r_addend());
5455 case elfcpp::R_PPC_PLTREL24
:
5456 case elfcpp::R_POWERPC_REL24
:
5459 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5461 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5462 reloc
.get_r_addend());
5463 if (gsym
->needs_plt_entry()
5464 || (!gsym
->final_value_is_known()
5465 && (gsym
->is_undefined()
5466 || gsym
->is_from_dynobj()
5467 || gsym
->is_preemptible())))
5468 target
->make_plt_entry(symtab
, layout
, gsym
);
5472 case elfcpp::R_PPC64_REL64
:
5473 case elfcpp::R_POWERPC_REL32
:
5474 // Make a dynamic relocation if necessary.
5475 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
5477 if (gsym
->may_need_copy_reloc())
5479 target
->copy_reloc(symtab
, layout
, object
,
5480 data_shndx
, output_section
, gsym
,
5485 Reloc_section
* rela_dyn
5486 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5487 check_non_pic(object
, r_type
);
5488 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5489 data_shndx
, reloc
.get_r_offset(),
5490 reloc
.get_r_addend());
5495 case elfcpp::R_POWERPC_REL14
:
5496 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5497 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5499 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5500 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5501 reloc
.get_r_addend());
5504 case elfcpp::R_POWERPC_REL16
:
5505 case elfcpp::R_POWERPC_REL16_LO
:
5506 case elfcpp::R_POWERPC_REL16_HI
:
5507 case elfcpp::R_POWERPC_REL16_HA
:
5508 case elfcpp::R_POWERPC_SECTOFF
:
5509 case elfcpp::R_POWERPC_TPREL16
:
5510 case elfcpp::R_POWERPC_DTPREL16
:
5511 case elfcpp::R_POWERPC_SECTOFF_LO
:
5512 case elfcpp::R_POWERPC_TPREL16_LO
:
5513 case elfcpp::R_POWERPC_DTPREL16_LO
:
5514 case elfcpp::R_POWERPC_SECTOFF_HI
:
5515 case elfcpp::R_POWERPC_TPREL16_HI
:
5516 case elfcpp::R_POWERPC_DTPREL16_HI
:
5517 case elfcpp::R_POWERPC_SECTOFF_HA
:
5518 case elfcpp::R_POWERPC_TPREL16_HA
:
5519 case elfcpp::R_POWERPC_DTPREL16_HA
:
5520 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5521 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5522 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5523 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5524 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5525 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5526 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5527 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5528 case elfcpp::R_PPC64_TPREL16_DS
:
5529 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5530 case elfcpp::R_PPC64_DTPREL16_DS
:
5531 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5532 case elfcpp::R_PPC64_SECTOFF_DS
:
5533 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5534 case elfcpp::R_PPC64_TLSGD
:
5535 case elfcpp::R_PPC64_TLSLD
:
5538 case elfcpp::R_POWERPC_GOT16
:
5539 case elfcpp::R_POWERPC_GOT16_LO
:
5540 case elfcpp::R_POWERPC_GOT16_HI
:
5541 case elfcpp::R_POWERPC_GOT16_HA
:
5542 case elfcpp::R_PPC64_GOT16_DS
:
5543 case elfcpp::R_PPC64_GOT16_LO_DS
:
5545 // The symbol requires a GOT entry.
5546 Output_data_got_powerpc
<size
, big_endian
>* got
;
5548 got
= target
->got_section(symtab
, layout
);
5549 if (gsym
->final_value_is_known())
5551 if (size
== 32 && is_ifunc
)
5552 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5554 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5556 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5558 // If we are generating a shared object or a pie, this
5559 // symbol's GOT entry will be set by a dynamic relocation.
5560 unsigned int off
= got
->add_constant(0);
5561 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5563 Reloc_section
* rela_dyn
5564 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5566 if (gsym
->can_use_relative_reloc(false)
5568 && gsym
->visibility() == elfcpp::STV_PROTECTED
5569 && parameters
->options().shared()))
5571 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5572 : elfcpp::R_POWERPC_RELATIVE
);
5573 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5577 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5578 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5584 case elfcpp::R_PPC64_TOC16
:
5585 case elfcpp::R_PPC64_TOC16_LO
:
5586 case elfcpp::R_PPC64_TOC16_HI
:
5587 case elfcpp::R_PPC64_TOC16_HA
:
5588 case elfcpp::R_PPC64_TOC16_DS
:
5589 case elfcpp::R_PPC64_TOC16_LO_DS
:
5590 // We need a GOT section.
5591 target
->got_section(symtab
, layout
);
5594 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5595 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5596 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5597 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5599 const bool final
= gsym
->final_value_is_known();
5600 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5601 if (tls_type
== tls::TLSOPT_NONE
)
5603 Output_data_got_powerpc
<size
, big_endian
>* got
5604 = target
->got_section(symtab
, layout
);
5605 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5606 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
5607 elfcpp::R_POWERPC_DTPMOD
,
5608 elfcpp::R_POWERPC_DTPREL
);
5610 else if (tls_type
== tls::TLSOPT_TO_IE
)
5612 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5614 Output_data_got_powerpc
<size
, big_endian
>* got
5615 = target
->got_section(symtab
, layout
);
5616 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5617 if (gsym
->is_undefined()
5618 || gsym
->is_from_dynobj())
5620 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5621 elfcpp::R_POWERPC_TPREL
);
5625 unsigned int off
= got
->add_constant(0);
5626 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5627 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5628 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5633 else if (tls_type
== tls::TLSOPT_TO_LE
)
5635 // no GOT relocs needed for Local Exec.
5642 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5643 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5644 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5645 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5647 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5648 if (tls_type
== tls::TLSOPT_NONE
)
5649 target
->tlsld_got_offset(symtab
, layout
, object
);
5650 else if (tls_type
== tls::TLSOPT_TO_LE
)
5652 // no GOT relocs needed for Local Exec.
5653 if (parameters
->options().emit_relocs())
5655 Output_section
* os
= layout
->tls_segment()->first_section();
5656 gold_assert(os
!= NULL
);
5657 os
->set_needs_symtab_index();
5665 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5666 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5667 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5668 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5670 Output_data_got_powerpc
<size
, big_endian
>* got
5671 = target
->got_section(symtab
, layout
);
5672 if (!gsym
->final_value_is_known()
5673 && (gsym
->is_from_dynobj()
5674 || gsym
->is_undefined()
5675 || gsym
->is_preemptible()))
5676 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5677 target
->rela_dyn_section(layout
),
5678 elfcpp::R_POWERPC_DTPREL
);
5680 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5684 case elfcpp::R_POWERPC_GOT_TPREL16
:
5685 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5686 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5687 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5689 const bool final
= gsym
->final_value_is_known();
5690 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5691 if (tls_type
== tls::TLSOPT_NONE
)
5693 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5695 Output_data_got_powerpc
<size
, big_endian
>* got
5696 = target
->got_section(symtab
, layout
);
5697 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5698 if (gsym
->is_undefined()
5699 || gsym
->is_from_dynobj())
5701 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5702 elfcpp::R_POWERPC_TPREL
);
5706 unsigned int off
= got
->add_constant(0);
5707 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5708 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5709 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5714 else if (tls_type
== tls::TLSOPT_TO_LE
)
5716 // no GOT relocs needed for Local Exec.
5724 unsupported_reloc_global(object
, r_type
, gsym
);
5730 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5731 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5732 case elfcpp::R_POWERPC_GOT_TPREL16
:
5733 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5734 case elfcpp::R_POWERPC_GOT16
:
5735 case elfcpp::R_PPC64_GOT16_DS
:
5736 case elfcpp::R_PPC64_TOC16
:
5737 case elfcpp::R_PPC64_TOC16_DS
:
5738 ppc_object
->set_has_small_toc_reloc();
5744 // Process relocations for gc.
5746 template<int size
, bool big_endian
>
5748 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5749 Symbol_table
* symtab
,
5751 Sized_relobj_file
<size
, big_endian
>* object
,
5752 unsigned int data_shndx
,
5754 const unsigned char* prelocs
,
5756 Output_section
* output_section
,
5757 bool needs_special_offset_handling
,
5758 size_t local_symbol_count
,
5759 const unsigned char* plocal_symbols
)
5761 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5762 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5763 Powerpc_relobj
<size
, big_endian
>* ppc_object
5764 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5766 ppc_object
->set_opd_valid();
5767 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5769 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5770 for (p
= ppc_object
->access_from_map()->begin();
5771 p
!= ppc_object
->access_from_map()->end();
5774 Address dst_off
= p
->first
;
5775 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5776 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5777 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5779 Object
* src_obj
= s
->first
;
5780 unsigned int src_indx
= s
->second
;
5781 symtab
->gc()->add_reference(src_obj
, src_indx
,
5782 ppc_object
, dst_indx
);
5786 ppc_object
->access_from_map()->clear();
5787 ppc_object
->process_gc_mark(symtab
);
5788 // Don't look at .opd relocs as .opd will reference everything.
5792 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5793 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5802 needs_special_offset_handling
,
5807 // Handle target specific gc actions when adding a gc reference from
5808 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5809 // and DST_OFF. For powerpc64, this adds a referenc to the code
5810 // section of a function descriptor.
5812 template<int size
, bool big_endian
>
5814 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5815 Symbol_table
* symtab
,
5817 unsigned int src_shndx
,
5819 unsigned int dst_shndx
,
5820 Address dst_off
) const
5822 if (size
!= 64 || dst_obj
->is_dynamic())
5825 Powerpc_relobj
<size
, big_endian
>* ppc_object
5826 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5827 if (dst_shndx
!= 0 && dst_shndx
== ppc_object
->opd_shndx())
5829 if (ppc_object
->opd_valid())
5831 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5832 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5836 // If we haven't run scan_opd_relocs, we must delay
5837 // processing this function descriptor reference.
5838 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5843 // Add any special sections for this symbol to the gc work list.
5844 // For powerpc64, this adds the code section of a function
5847 template<int size
, bool big_endian
>
5849 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5850 Symbol_table
* symtab
,
5855 Powerpc_relobj
<size
, big_endian
>* ppc_object
5856 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5858 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5859 if (is_ordinary
&& shndx
!= 0 && shndx
== ppc_object
->opd_shndx())
5861 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5862 Address dst_off
= gsym
->value();
5863 if (ppc_object
->opd_valid())
5865 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5866 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5869 ppc_object
->add_gc_mark(dst_off
);
5874 // For a symbol location in .opd, set LOC to the location of the
5877 template<int size
, bool big_endian
>
5879 Target_powerpc
<size
, big_endian
>::do_function_location(
5880 Symbol_location
* loc
) const
5882 if (size
== 64 && loc
->shndx
!= 0)
5884 if (loc
->object
->is_dynamic())
5886 Powerpc_dynobj
<size
, big_endian
>* ppc_object
5887 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
5888 if (loc
->shndx
== ppc_object
->opd_shndx())
5891 Address off
= loc
->offset
- ppc_object
->opd_address();
5892 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
5893 loc
->offset
= dest_off
;
5898 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5899 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
5900 if (loc
->shndx
== ppc_object
->opd_shndx())
5903 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
5904 loc
->offset
= dest_off
;
5910 // Scan relocations for a section.
5912 template<int size
, bool big_endian
>
5914 Target_powerpc
<size
, big_endian
>::scan_relocs(
5915 Symbol_table
* symtab
,
5917 Sized_relobj_file
<size
, big_endian
>* object
,
5918 unsigned int data_shndx
,
5919 unsigned int sh_type
,
5920 const unsigned char* prelocs
,
5922 Output_section
* output_section
,
5923 bool needs_special_offset_handling
,
5924 size_t local_symbol_count
,
5925 const unsigned char* plocal_symbols
)
5927 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5928 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5930 if (sh_type
== elfcpp::SHT_REL
)
5932 gold_error(_("%s: unsupported REL reloc section"),
5933 object
->name().c_str());
5937 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5946 needs_special_offset_handling
,
5951 // Functor class for processing the global symbol table.
5952 // Removes symbols defined on discarded opd entries.
5954 template<bool big_endian
>
5955 class Global_symbol_visitor_opd
5958 Global_symbol_visitor_opd()
5962 operator()(Sized_symbol
<64>* sym
)
5964 if (sym
->has_symtab_index()
5965 || sym
->source() != Symbol::FROM_OBJECT
5966 || !sym
->in_real_elf())
5969 if (sym
->object()->is_dynamic())
5972 Powerpc_relobj
<64, big_endian
>* symobj
5973 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5974 if (symobj
->opd_shndx() == 0)
5978 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5979 if (shndx
== symobj
->opd_shndx()
5980 && symobj
->get_opd_discard(sym
->value()))
5981 sym
->set_symtab_index(-1U);
5985 template<int size
, bool big_endian
>
5987 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5989 Symbol_table
* symtab
)
5993 Output_data_save_res
<64, big_endian
>* savres
5994 = new Output_data_save_res
<64, big_endian
>(symtab
);
5995 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5996 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
5997 savres
, ORDER_TEXT
, false);
6001 // Sort linker created .got section first (for the header), then input
6002 // sections belonging to files using small model code.
6004 template<bool big_endian
>
6005 class Sort_toc_sections
6009 operator()(const Output_section::Input_section
& is1
,
6010 const Output_section::Input_section
& is2
) const
6012 if (!is1
.is_input_section() && is2
.is_input_section())
6015 = (is1
.is_input_section()
6016 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6017 ->has_small_toc_reloc()));
6019 = (is2
.is_input_section()
6020 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6021 ->has_small_toc_reloc()));
6022 return small1
&& !small2
;
6026 // Finalize the sections.
6028 template<int size
, bool big_endian
>
6030 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6032 const Input_objects
*,
6033 Symbol_table
* symtab
)
6035 if (parameters
->doing_static_link())
6037 // At least some versions of glibc elf-init.o have a strong
6038 // reference to __rela_iplt marker syms. A weak ref would be
6040 if (this->iplt_
!= NULL
)
6042 Reloc_section
* rel
= this->iplt_
->rel_plt();
6043 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6044 Symbol_table::PREDEFINED
, rel
, 0, 0,
6045 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6046 elfcpp::STV_HIDDEN
, 0, false, true);
6047 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6048 Symbol_table::PREDEFINED
, rel
, 0, 0,
6049 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6050 elfcpp::STV_HIDDEN
, 0, true, true);
6054 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6055 Symbol_table::PREDEFINED
, 0, 0,
6056 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6057 elfcpp::STV_HIDDEN
, 0, true, false);
6058 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6059 Symbol_table::PREDEFINED
, 0, 0,
6060 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6061 elfcpp::STV_HIDDEN
, 0, true, false);
6067 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6068 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6070 if (!parameters
->options().relocatable())
6072 this->define_save_restore_funcs(layout
, symtab
);
6074 // Annoyingly, we need to make these sections now whether or
6075 // not we need them. If we delay until do_relax then we
6076 // need to mess with the relaxation machinery checkpointing.
6077 this->got_section(symtab
, layout
);
6078 this->make_brlt_section(layout
);
6080 if (parameters
->options().toc_sort())
6082 Output_section
* os
= this->got_
->output_section();
6083 if (os
!= NULL
&& os
->input_sections().size() > 1)
6084 std::stable_sort(os
->input_sections().begin(),
6085 os
->input_sections().end(),
6086 Sort_toc_sections
<big_endian
>());
6091 // Fill in some more dynamic tags.
6092 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6095 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6097 : this->plt_
->rel_plt());
6098 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6099 this->rela_dyn_
, true, size
== 32);
6103 if (this->got_
!= NULL
)
6105 this->got_
->finalize_data_size();
6106 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6107 this->got_
, this->got_
->g_o_t());
6112 if (this->glink_
!= NULL
)
6114 this->glink_
->finalize_data_size();
6115 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6117 (this->glink_
->pltresolve_size
6123 // Emit any relocs we saved in an attempt to avoid generating COPY
6125 if (this->copy_relocs_
.any_saved_relocs())
6126 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6129 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6133 ok_lo_toc_insn(uint32_t insn
)
6135 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6136 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6137 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6138 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6139 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6140 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6141 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6142 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6143 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6144 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6145 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6146 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6147 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6148 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6149 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6151 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6152 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6153 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6156 // Return the value to use for a branch relocation.
6158 template<int size
, bool big_endian
>
6159 typename Target_powerpc
<size
, big_endian
>::Address
6160 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6161 const Symbol_table
* symtab
,
6163 const Sized_symbol
<size
>* gsym
,
6164 Powerpc_relobj
<size
, big_endian
>* object
,
6165 unsigned int *dest_shndx
)
6171 // If the symbol is defined in an opd section, ie. is a function
6172 // descriptor, use the function descriptor code entry address
6173 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6175 && gsym
->source() != Symbol::FROM_OBJECT
)
6178 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6179 unsigned int shndx
= symobj
->opd_shndx();
6182 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6183 if (opd_addr
== invalid_address
)
6185 opd_addr
+= symobj
->output_section_address(shndx
);
6186 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
6189 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
6190 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6193 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6194 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6195 *dest_shndx
= folded
.second
;
6197 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6198 gold_assert(sec_addr
!= invalid_address
);
6199 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6200 value
= sec_addr
+ sec_off
;
6205 // Perform a relocation.
6207 template<int size
, bool big_endian
>
6209 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6210 const Relocate_info
<size
, big_endian
>* relinfo
,
6211 Target_powerpc
* target
,
6214 const elfcpp::Rela
<size
, big_endian
>& rela
,
6215 unsigned int r_type
,
6216 const Sized_symbol
<size
>* gsym
,
6217 const Symbol_value
<size
>* psymval
,
6218 unsigned char* view
,
6220 section_size_type view_size
)
6225 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6227 case Track_tls::NOT_EXPECTED
:
6228 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6229 _("__tls_get_addr call lacks marker reloc"));
6231 case Track_tls::EXPECTED
:
6232 // We have already complained.
6234 case Track_tls::SKIP
:
6236 case Track_tls::NORMAL
:
6240 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6241 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6242 Powerpc_relobj
<size
, big_endian
>* const object
6243 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6245 bool has_plt_value
= false;
6246 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6248 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
6249 : object
->local_has_plt_offset(r_sym
))
6250 && (!psymval
->is_ifunc_symbol()
6251 || Scan::reloc_needs_plt_for_ifunc(object
, r_type
, false)))
6253 Stub_table
<size
, big_endian
>* stub_table
6254 = object
->stub_table(relinfo
->data_shndx
);
6255 if (stub_table
== NULL
)
6257 // This is a ref from a data section to an ifunc symbol.
6258 if (target
->stub_tables().size() != 0)
6259 stub_table
= target
->stub_tables()[0];
6261 gold_assert(stub_table
!= NULL
);
6264 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
6265 rela
.get_r_addend());
6267 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
6268 rela
.get_r_addend());
6269 gold_assert(off
!= invalid_address
);
6270 value
= stub_table
->stub_address() + off
;
6271 has_plt_value
= true;
6274 if (r_type
== elfcpp::R_POWERPC_GOT16
6275 || r_type
== elfcpp::R_POWERPC_GOT16_LO
6276 || r_type
== elfcpp::R_POWERPC_GOT16_HI
6277 || r_type
== elfcpp::R_POWERPC_GOT16_HA
6278 || r_type
== elfcpp::R_PPC64_GOT16_DS
6279 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
6283 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
6284 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
6288 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6289 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
6290 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
6292 value
-= target
->got_section()->got_base_offset(object
);
6294 else if (r_type
== elfcpp::R_PPC64_TOC
)
6296 value
= (target
->got_section()->output_section()->address()
6297 + object
->toc_base_offset());
6299 else if (gsym
!= NULL
6300 && (r_type
== elfcpp::R_POWERPC_REL24
6301 || r_type
== elfcpp::R_PPC_PLTREL24
)
6306 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
6307 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
6308 bool can_plt_call
= false;
6309 if (rela
.get_r_offset() + 8 <= view_size
)
6311 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
6312 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
6315 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
6317 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
6318 can_plt_call
= true;
6323 // If we don't have a branch and link followed by a nop,
6324 // we can't go via the plt because there is no place to
6325 // put a toc restoring instruction.
6326 // Unless we know we won't be returning.
6327 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
6328 can_plt_call
= true;
6332 // g++ as of 20130507 emits self-calls without a
6333 // following nop. This is arguably wrong since we have
6334 // conflicting information. On the one hand a global
6335 // symbol and on the other a local call sequence, but
6336 // don't error for this special case.
6337 // It isn't possible to cheaply verify we have exactly
6338 // such a call. Allow all calls to the same section.
6340 Address code
= value
;
6341 if (gsym
->source() == Symbol::FROM_OBJECT
6342 && gsym
->object() == object
)
6344 Address addend
= rela
.get_r_addend();
6345 unsigned int dest_shndx
;
6346 Address opdent
= psymval
->value(object
, addend
);
6347 code
= target
->symval_for_branch(relinfo
->symtab
, opdent
,
6348 gsym
, object
, &dest_shndx
);
6350 if (dest_shndx
== 0)
6351 dest_shndx
= gsym
->shndx(&is_ordinary
);
6352 ok
= dest_shndx
== relinfo
->data_shndx
;
6356 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6357 _("call lacks nop, can't restore toc; "
6358 "recompile with -fPIC"));
6364 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6365 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6366 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6367 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6369 // First instruction of a global dynamic sequence, arg setup insn.
6370 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6371 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6372 enum Got_type got_type
= GOT_TYPE_STANDARD
;
6373 if (tls_type
== tls::TLSOPT_NONE
)
6374 got_type
= GOT_TYPE_TLSGD
;
6375 else if (tls_type
== tls::TLSOPT_TO_IE
)
6376 got_type
= GOT_TYPE_TPREL
;
6377 if (got_type
!= GOT_TYPE_STANDARD
)
6381 gold_assert(gsym
->has_got_offset(got_type
));
6382 value
= gsym
->got_offset(got_type
);
6386 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6387 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
6388 value
= object
->local_got_offset(r_sym
, got_type
);
6390 value
-= target
->got_section()->got_base_offset(object
);
6392 if (tls_type
== tls::TLSOPT_TO_IE
)
6394 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6395 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6397 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6398 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6399 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
6401 insn
|= 32 << 26; // lwz
6403 insn
|= 58 << 26; // ld
6404 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6406 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6407 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6409 else if (tls_type
== tls::TLSOPT_TO_LE
)
6411 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6412 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6414 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6415 Insn insn
= addis_3_13
;
6418 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6419 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6420 value
= psymval
->value(object
, rela
.get_r_addend());
6424 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6426 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6427 r_type
= elfcpp::R_POWERPC_NONE
;
6431 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6432 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6433 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6434 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6436 // First instruction of a local dynamic sequence, arg setup insn.
6437 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6438 if (tls_type
== tls::TLSOPT_NONE
)
6440 value
= target
->tlsld_got_offset();
6441 value
-= target
->got_section()->got_base_offset(object
);
6445 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6446 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6447 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6449 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6450 Insn insn
= addis_3_13
;
6453 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6454 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6459 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6461 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6462 r_type
= elfcpp::R_POWERPC_NONE
;
6466 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
6467 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
6468 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
6469 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
6471 // Accesses relative to a local dynamic sequence address,
6472 // no optimisation here.
6475 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
6476 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
6480 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6481 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
6482 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
6484 value
-= target
->got_section()->got_base_offset(object
);
6486 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6487 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6488 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6489 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6491 // First instruction of initial exec sequence.
6492 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6493 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6494 if (tls_type
== tls::TLSOPT_NONE
)
6498 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
6499 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
6503 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6504 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
6505 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
6507 value
-= target
->got_section()->got_base_offset(object
);
6511 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6512 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6513 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6515 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6516 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6517 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6522 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6523 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6524 value
= psymval
->value(object
, rela
.get_r_addend());
6528 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6530 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6531 r_type
= elfcpp::R_POWERPC_NONE
;
6535 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6536 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6538 // Second instruction of a global dynamic sequence,
6539 // the __tls_get_addr call
6540 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6541 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6542 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6543 if (tls_type
!= tls::TLSOPT_NONE
)
6545 if (tls_type
== tls::TLSOPT_TO_IE
)
6547 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6548 Insn insn
= add_3_3_13
;
6551 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6552 r_type
= elfcpp::R_POWERPC_NONE
;
6556 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6557 Insn insn
= addi_3_3
;
6558 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6559 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6560 view
+= 2 * big_endian
;
6561 value
= psymval
->value(object
, rela
.get_r_addend());
6563 this->skip_next_tls_get_addr_call();
6566 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6567 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6569 // Second instruction of a local dynamic sequence,
6570 // the __tls_get_addr call
6571 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6572 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6573 if (tls_type
== tls::TLSOPT_TO_LE
)
6575 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6576 Insn insn
= addi_3_3
;
6577 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6578 this->skip_next_tls_get_addr_call();
6579 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6580 view
+= 2 * big_endian
;
6584 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6586 // Second instruction of an initial exec sequence
6587 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6588 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6589 if (tls_type
== tls::TLSOPT_TO_LE
)
6591 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6592 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6593 unsigned int reg
= size
== 32 ? 2 : 13;
6594 insn
= at_tls_transform(insn
, reg
);
6595 gold_assert(insn
!= 0);
6596 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6597 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6598 view
+= 2 * big_endian
;
6599 value
= psymval
->value(object
, rela
.get_r_addend());
6602 else if (!has_plt_value
)
6605 unsigned int dest_shndx
;
6606 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
6607 addend
= rela
.get_r_addend();
6608 value
= psymval
->value(object
, addend
);
6609 if (size
== 64 && is_branch_reloc(r_type
))
6610 value
= target
->symval_for_branch(relinfo
->symtab
, value
,
6611 gsym
, object
, &dest_shndx
);
6612 unsigned int max_branch_offset
= 0;
6613 if (r_type
== elfcpp::R_POWERPC_REL24
6614 || r_type
== elfcpp::R_PPC_PLTREL24
6615 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
6616 max_branch_offset
= 1 << 25;
6617 else if (r_type
== elfcpp::R_POWERPC_REL14
6618 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
6619 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
6620 max_branch_offset
= 1 << 15;
6621 if (max_branch_offset
!= 0
6622 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
6624 Stub_table
<size
, big_endian
>* stub_table
6625 = object
->stub_table(relinfo
->data_shndx
);
6626 if (stub_table
!= NULL
)
6628 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6629 if (off
!= invalid_address
)
6630 value
= (stub_table
->stub_address() + stub_table
->plt_size()
6638 case elfcpp::R_PPC64_REL64
:
6639 case elfcpp::R_POWERPC_REL32
:
6640 case elfcpp::R_POWERPC_REL24
:
6641 case elfcpp::R_PPC_PLTREL24
:
6642 case elfcpp::R_PPC_LOCAL24PC
:
6643 case elfcpp::R_POWERPC_REL16
:
6644 case elfcpp::R_POWERPC_REL16_LO
:
6645 case elfcpp::R_POWERPC_REL16_HI
:
6646 case elfcpp::R_POWERPC_REL16_HA
:
6647 case elfcpp::R_POWERPC_REL14
:
6648 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6649 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6653 case elfcpp::R_PPC64_TOC16
:
6654 case elfcpp::R_PPC64_TOC16_LO
:
6655 case elfcpp::R_PPC64_TOC16_HI
:
6656 case elfcpp::R_PPC64_TOC16_HA
:
6657 case elfcpp::R_PPC64_TOC16_DS
:
6658 case elfcpp::R_PPC64_TOC16_LO_DS
:
6659 // Subtract the TOC base address.
6660 value
-= (target
->got_section()->output_section()->address()
6661 + object
->toc_base_offset());
6664 case elfcpp::R_POWERPC_SECTOFF
:
6665 case elfcpp::R_POWERPC_SECTOFF_LO
:
6666 case elfcpp::R_POWERPC_SECTOFF_HI
:
6667 case elfcpp::R_POWERPC_SECTOFF_HA
:
6668 case elfcpp::R_PPC64_SECTOFF_DS
:
6669 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6671 value
-= os
->address();
6674 case elfcpp::R_PPC64_TPREL16_DS
:
6675 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6677 // R_PPC_TLSGD and R_PPC_TLSLD
6679 case elfcpp::R_POWERPC_TPREL16
:
6680 case elfcpp::R_POWERPC_TPREL16_LO
:
6681 case elfcpp::R_POWERPC_TPREL16_HI
:
6682 case elfcpp::R_POWERPC_TPREL16_HA
:
6683 case elfcpp::R_POWERPC_TPREL
:
6684 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6685 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6686 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6687 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6688 // tls symbol values are relative to tls_segment()->vaddr()
6692 case elfcpp::R_PPC64_DTPREL16_DS
:
6693 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6694 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6695 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6696 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6697 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6699 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6700 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6702 case elfcpp::R_POWERPC_DTPREL16
:
6703 case elfcpp::R_POWERPC_DTPREL16_LO
:
6704 case elfcpp::R_POWERPC_DTPREL16_HI
:
6705 case elfcpp::R_POWERPC_DTPREL16_HA
:
6706 case elfcpp::R_POWERPC_DTPREL
:
6707 // tls symbol values are relative to tls_segment()->vaddr()
6708 value
-= dtp_offset
;
6715 Insn branch_bit
= 0;
6718 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6719 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6720 branch_bit
= 1 << 21;
6721 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6722 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6724 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6725 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6728 if (this->is_isa_v2
)
6730 // Set 'a' bit. This is 0b00010 in BO field for branch
6731 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6732 // for branch on CTR insns (BO == 1a00t or 1a01t).
6733 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6735 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6742 // Invert 'y' bit if not the default.
6743 if (static_cast<Signed_address
>(value
) < 0)
6746 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6756 // Multi-instruction sequences that access the TOC can be
6757 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6758 // to nop; addi rb,r2,x;
6764 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6765 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6766 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6767 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6768 case elfcpp::R_POWERPC_GOT16_HA
:
6769 case elfcpp::R_PPC64_TOC16_HA
:
6770 if (parameters
->options().toc_optimize())
6772 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6773 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6774 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6775 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6776 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6777 _("toc optimization is not supported "
6778 "for %#08x instruction"), insn
);
6779 else if (value
+ 0x8000 < 0x10000)
6781 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6787 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6788 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6789 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6790 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6791 case elfcpp::R_POWERPC_GOT16_LO
:
6792 case elfcpp::R_PPC64_GOT16_LO_DS
:
6793 case elfcpp::R_PPC64_TOC16_LO
:
6794 case elfcpp::R_PPC64_TOC16_LO_DS
:
6795 if (parameters
->options().toc_optimize())
6797 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6798 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6799 if (!ok_lo_toc_insn(insn
))
6800 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6801 _("toc optimization is not supported "
6802 "for %#08x instruction"), insn
);
6803 else if (value
+ 0x8000 < 0x10000)
6805 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6807 // Transform addic to addi when we change reg.
6808 insn
&= ~((0x3f << 26) | (0x1f << 16));
6809 insn
|= (14u << 26) | (2 << 16);
6813 insn
&= ~(0x1f << 16);
6816 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6823 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6826 case elfcpp::R_POWERPC_ADDR32
:
6827 case elfcpp::R_POWERPC_UADDR32
:
6829 overflow
= Reloc::CHECK_BITFIELD
;
6832 case elfcpp::R_POWERPC_REL32
:
6834 overflow
= Reloc::CHECK_SIGNED
;
6837 case elfcpp::R_POWERPC_ADDR24
:
6838 case elfcpp::R_POWERPC_ADDR16
:
6839 case elfcpp::R_POWERPC_UADDR16
:
6840 case elfcpp::R_PPC64_ADDR16_DS
:
6841 case elfcpp::R_POWERPC_ADDR14
:
6842 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6843 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6844 overflow
= Reloc::CHECK_BITFIELD
;
6847 case elfcpp::R_POWERPC_REL24
:
6848 case elfcpp::R_PPC_PLTREL24
:
6849 case elfcpp::R_PPC_LOCAL24PC
:
6850 case elfcpp::R_POWERPC_REL16
:
6851 case elfcpp::R_PPC64_TOC16
:
6852 case elfcpp::R_POWERPC_GOT16
:
6853 case elfcpp::R_POWERPC_SECTOFF
:
6854 case elfcpp::R_POWERPC_TPREL16
:
6855 case elfcpp::R_POWERPC_DTPREL16
:
6856 case elfcpp::R_PPC64_TPREL16_DS
:
6857 case elfcpp::R_PPC64_DTPREL16_DS
:
6858 case elfcpp::R_PPC64_TOC16_DS
:
6859 case elfcpp::R_PPC64_GOT16_DS
:
6860 case elfcpp::R_PPC64_SECTOFF_DS
:
6861 case elfcpp::R_POWERPC_REL14
:
6862 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6863 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6864 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6865 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6866 case elfcpp::R_POWERPC_GOT_TPREL16
:
6867 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6868 overflow
= Reloc::CHECK_SIGNED
;
6872 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6873 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6876 case elfcpp::R_POWERPC_NONE
:
6877 case elfcpp::R_POWERPC_TLS
:
6878 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6879 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6880 case elfcpp::R_PPC_EMB_MRKREF
:
6883 case elfcpp::R_PPC64_ADDR64
:
6884 case elfcpp::R_PPC64_REL64
:
6885 case elfcpp::R_PPC64_TOC
:
6886 Reloc::addr64(view
, value
);
6889 case elfcpp::R_POWERPC_TPREL
:
6890 case elfcpp::R_POWERPC_DTPREL
:
6892 Reloc::addr64(view
, value
);
6894 status
= Reloc::addr32(view
, value
, overflow
);
6897 case elfcpp::R_PPC64_UADDR64
:
6898 Reloc::addr64_u(view
, value
);
6901 case elfcpp::R_POWERPC_ADDR32
:
6902 status
= Reloc::addr32(view
, value
, overflow
);
6905 case elfcpp::R_POWERPC_REL32
:
6906 case elfcpp::R_POWERPC_UADDR32
:
6907 status
= Reloc::addr32_u(view
, value
, overflow
);
6910 case elfcpp::R_POWERPC_ADDR24
:
6911 case elfcpp::R_POWERPC_REL24
:
6912 case elfcpp::R_PPC_PLTREL24
:
6913 case elfcpp::R_PPC_LOCAL24PC
:
6914 status
= Reloc::addr24(view
, value
, overflow
);
6917 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6918 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6921 status
= Reloc::addr16_ds(view
, value
, overflow
);
6924 case elfcpp::R_POWERPC_ADDR16
:
6925 case elfcpp::R_POWERPC_REL16
:
6926 case elfcpp::R_PPC64_TOC16
:
6927 case elfcpp::R_POWERPC_GOT16
:
6928 case elfcpp::R_POWERPC_SECTOFF
:
6929 case elfcpp::R_POWERPC_TPREL16
:
6930 case elfcpp::R_POWERPC_DTPREL16
:
6931 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6932 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6933 case elfcpp::R_POWERPC_GOT_TPREL16
:
6934 case elfcpp::R_POWERPC_ADDR16_LO
:
6935 case elfcpp::R_POWERPC_REL16_LO
:
6936 case elfcpp::R_PPC64_TOC16_LO
:
6937 case elfcpp::R_POWERPC_GOT16_LO
:
6938 case elfcpp::R_POWERPC_SECTOFF_LO
:
6939 case elfcpp::R_POWERPC_TPREL16_LO
:
6940 case elfcpp::R_POWERPC_DTPREL16_LO
:
6941 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6942 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6943 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6944 status
= Reloc::addr16(view
, value
, overflow
);
6947 case elfcpp::R_POWERPC_UADDR16
:
6948 status
= Reloc::addr16_u(view
, value
, overflow
);
6951 case elfcpp::R_POWERPC_ADDR16_HI
:
6952 case elfcpp::R_POWERPC_REL16_HI
:
6953 case elfcpp::R_PPC64_TOC16_HI
:
6954 case elfcpp::R_POWERPC_GOT16_HI
:
6955 case elfcpp::R_POWERPC_SECTOFF_HI
:
6956 case elfcpp::R_POWERPC_TPREL16_HI
:
6957 case elfcpp::R_POWERPC_DTPREL16_HI
:
6958 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6959 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6960 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6961 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6962 Reloc::addr16_hi(view
, value
);
6965 case elfcpp::R_POWERPC_ADDR16_HA
:
6966 case elfcpp::R_POWERPC_REL16_HA
:
6967 case elfcpp::R_PPC64_TOC16_HA
:
6968 case elfcpp::R_POWERPC_GOT16_HA
:
6969 case elfcpp::R_POWERPC_SECTOFF_HA
:
6970 case elfcpp::R_POWERPC_TPREL16_HA
:
6971 case elfcpp::R_POWERPC_DTPREL16_HA
:
6972 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6973 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6974 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6975 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6976 Reloc::addr16_ha(view
, value
);
6979 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6981 // R_PPC_EMB_NADDR16_LO
6983 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6984 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6985 Reloc::addr16_hi2(view
, value
);
6988 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6990 // R_PPC_EMB_NADDR16_HI
6992 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6993 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6994 Reloc::addr16_ha2(view
, value
);
6997 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6999 // R_PPC_EMB_NADDR16_HA
7001 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7002 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7003 Reloc::addr16_hi3(view
, value
);
7006 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7010 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7011 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7012 Reloc::addr16_ha3(view
, value
);
7015 case elfcpp::R_PPC64_DTPREL16_DS
:
7016 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7018 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7020 case elfcpp::R_PPC64_TPREL16_DS
:
7021 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7023 // R_PPC_TLSGD, R_PPC_TLSLD
7025 case elfcpp::R_PPC64_ADDR16_DS
:
7026 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7027 case elfcpp::R_PPC64_TOC16_DS
:
7028 case elfcpp::R_PPC64_TOC16_LO_DS
:
7029 case elfcpp::R_PPC64_GOT16_DS
:
7030 case elfcpp::R_PPC64_GOT16_LO_DS
:
7031 case elfcpp::R_PPC64_SECTOFF_DS
:
7032 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7033 status
= Reloc::addr16_ds(view
, value
, overflow
);
7036 case elfcpp::R_POWERPC_ADDR14
:
7037 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7038 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7039 case elfcpp::R_POWERPC_REL14
:
7040 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7041 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7042 status
= Reloc::addr14(view
, value
, overflow
);
7045 case elfcpp::R_POWERPC_COPY
:
7046 case elfcpp::R_POWERPC_GLOB_DAT
:
7047 case elfcpp::R_POWERPC_JMP_SLOT
:
7048 case elfcpp::R_POWERPC_RELATIVE
:
7049 case elfcpp::R_POWERPC_DTPMOD
:
7050 case elfcpp::R_PPC64_JMP_IREL
:
7051 case elfcpp::R_POWERPC_IRELATIVE
:
7052 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7053 _("unexpected reloc %u in object file"),
7057 case elfcpp::R_PPC_EMB_SDA21
:
7062 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7066 case elfcpp::R_PPC_EMB_SDA2I16
:
7067 case elfcpp::R_PPC_EMB_SDA2REL
:
7070 // R_PPC64_TLSGD, R_PPC64_TLSLD
7073 case elfcpp::R_POWERPC_PLT32
:
7074 case elfcpp::R_POWERPC_PLTREL32
:
7075 case elfcpp::R_POWERPC_PLT16_LO
:
7076 case elfcpp::R_POWERPC_PLT16_HI
:
7077 case elfcpp::R_POWERPC_PLT16_HA
:
7078 case elfcpp::R_PPC_SDAREL16
:
7079 case elfcpp::R_POWERPC_ADDR30
:
7080 case elfcpp::R_PPC64_PLT64
:
7081 case elfcpp::R_PPC64_PLTREL64
:
7082 case elfcpp::R_PPC64_PLTGOT16
:
7083 case elfcpp::R_PPC64_PLTGOT16_LO
:
7084 case elfcpp::R_PPC64_PLTGOT16_HI
:
7085 case elfcpp::R_PPC64_PLTGOT16_HA
:
7086 case elfcpp::R_PPC64_PLT16_LO_DS
:
7087 case elfcpp::R_PPC64_PLTGOT16_DS
:
7088 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7089 case elfcpp::R_PPC_EMB_RELSEC16
:
7090 case elfcpp::R_PPC_EMB_RELST_LO
:
7091 case elfcpp::R_PPC_EMB_RELST_HI
:
7092 case elfcpp::R_PPC_EMB_RELST_HA
:
7093 case elfcpp::R_PPC_EMB_BIT_FLD
:
7094 case elfcpp::R_PPC_EMB_RELSDA
:
7095 case elfcpp::R_PPC_TOC16
:
7098 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7099 _("unsupported reloc %u"),
7103 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
7104 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7105 _("relocation overflow"));
7110 // Relocate section data.
7112 template<int size
, bool big_endian
>
7114 Target_powerpc
<size
, big_endian
>::relocate_section(
7115 const Relocate_info
<size
, big_endian
>* relinfo
,
7116 unsigned int sh_type
,
7117 const unsigned char* prelocs
,
7119 Output_section
* output_section
,
7120 bool needs_special_offset_handling
,
7121 unsigned char* view
,
7123 section_size_type view_size
,
7124 const Reloc_symbol_changes
* reloc_symbol_changes
)
7126 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7127 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
7128 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
7129 Powerpc_comdat_behavior
;
7131 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7133 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
7134 Powerpc_relocate
, Powerpc_comdat_behavior
>(
7140 needs_special_offset_handling
,
7144 reloc_symbol_changes
);
7147 class Powerpc_scan_relocatable_reloc
7150 // Return the strategy to use for a local symbol which is not a
7151 // section symbol, given the relocation type.
7152 inline Relocatable_relocs::Reloc_strategy
7153 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
7155 if (r_type
== 0 && r_sym
== 0)
7156 return Relocatable_relocs::RELOC_DISCARD
;
7157 return Relocatable_relocs::RELOC_COPY
;
7160 // Return the strategy to use for a local symbol which is a section
7161 // symbol, given the relocation type.
7162 inline Relocatable_relocs::Reloc_strategy
7163 local_section_strategy(unsigned int, Relobj
*)
7165 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
7168 // Return the strategy to use for a global symbol, given the
7169 // relocation type, the object, and the symbol index.
7170 inline Relocatable_relocs::Reloc_strategy
7171 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
7173 if (r_type
== elfcpp::R_PPC_PLTREL24
)
7174 return Relocatable_relocs::RELOC_SPECIAL
;
7175 return Relocatable_relocs::RELOC_COPY
;
7179 // Scan the relocs during a relocatable link.
7181 template<int size
, bool big_endian
>
7183 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
7184 Symbol_table
* symtab
,
7186 Sized_relobj_file
<size
, big_endian
>* object
,
7187 unsigned int data_shndx
,
7188 unsigned int sh_type
,
7189 const unsigned char* prelocs
,
7191 Output_section
* output_section
,
7192 bool needs_special_offset_handling
,
7193 size_t local_symbol_count
,
7194 const unsigned char* plocal_symbols
,
7195 Relocatable_relocs
* rr
)
7197 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7199 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
7200 Powerpc_scan_relocatable_reloc
>(
7208 needs_special_offset_handling
,
7214 // Emit relocations for a section.
7215 // This is a modified version of the function by the same name in
7216 // target-reloc.h. Using relocate_special_relocatable for
7217 // R_PPC_PLTREL24 would require duplication of the entire body of the
7218 // loop, so we may as well duplicate the whole thing.
7220 template<int size
, bool big_endian
>
7222 Target_powerpc
<size
, big_endian
>::relocate_relocs(
7223 const Relocate_info
<size
, big_endian
>* relinfo
,
7224 unsigned int sh_type
,
7225 const unsigned char* prelocs
,
7227 Output_section
* output_section
,
7228 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
7229 const Relocatable_relocs
* rr
,
7231 Address view_address
,
7233 unsigned char* reloc_view
,
7234 section_size_type reloc_view_size
)
7236 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7238 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
7240 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
7242 const int reloc_size
7243 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7245 Powerpc_relobj
<size
, big_endian
>* const object
7246 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7247 const unsigned int local_count
= object
->local_symbol_count();
7248 unsigned int got2_shndx
= object
->got2_shndx();
7249 Address got2_addend
= 0;
7250 if (got2_shndx
!= 0)
7252 got2_addend
= object
->get_output_section_offset(got2_shndx
);
7253 gold_assert(got2_addend
!= invalid_address
);
7256 unsigned char* pwrite
= reloc_view
;
7257 bool zap_next
= false;
7258 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
7260 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
7261 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
7264 Reltype
reloc(prelocs
);
7265 Reltype_write
reloc_write(pwrite
);
7267 Address offset
= reloc
.get_r_offset();
7268 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
7269 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
7270 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
7271 const unsigned int orig_r_sym
= r_sym
;
7272 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
7273 = reloc
.get_r_addend();
7274 const Symbol
* gsym
= NULL
;
7278 // We could arrange to discard these and other relocs for
7279 // tls optimised sequences in the strategy methods, but for
7280 // now do as BFD ld does.
7281 r_type
= elfcpp::R_POWERPC_NONE
;
7285 // Get the new symbol index.
7286 if (r_sym
< local_count
)
7290 case Relocatable_relocs::RELOC_COPY
:
7291 case Relocatable_relocs::RELOC_SPECIAL
:
7294 r_sym
= object
->symtab_index(r_sym
);
7295 gold_assert(r_sym
!= -1U);
7299 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
7301 // We are adjusting a section symbol. We need to find
7302 // the symbol table index of the section symbol for
7303 // the output section corresponding to input section
7304 // in which this symbol is defined.
7305 gold_assert(r_sym
< local_count
);
7307 unsigned int shndx
=
7308 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
7309 gold_assert(is_ordinary
);
7310 Output_section
* os
= object
->output_section(shndx
);
7311 gold_assert(os
!= NULL
);
7312 gold_assert(os
->needs_symtab_index());
7313 r_sym
= os
->symtab_index();
7323 gsym
= object
->global_symbol(r_sym
);
7324 gold_assert(gsym
!= NULL
);
7325 if (gsym
->is_forwarder())
7326 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
7328 gold_assert(gsym
->has_symtab_index());
7329 r_sym
= gsym
->symtab_index();
7332 // Get the new offset--the location in the output section where
7333 // this relocation should be applied.
7334 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7335 offset
+= offset_in_output_section
;
7338 section_offset_type sot_offset
=
7339 convert_types
<section_offset_type
, Address
>(offset
);
7340 section_offset_type new_sot_offset
=
7341 output_section
->output_offset(object
, relinfo
->data_shndx
,
7343 gold_assert(new_sot_offset
!= -1);
7344 offset
= new_sot_offset
;
7347 // In an object file, r_offset is an offset within the section.
7348 // In an executable or dynamic object, generated by
7349 // --emit-relocs, r_offset is an absolute address.
7350 if (!parameters
->options().relocatable())
7352 offset
+= view_address
;
7353 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7354 offset
-= offset_in_output_section
;
7357 // Handle the reloc addend based on the strategy.
7358 if (strategy
== Relocatable_relocs::RELOC_COPY
)
7360 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
7362 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
7363 addend
= psymval
->value(object
, addend
);
7365 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
7367 if (addend
>= 32768)
7368 addend
+= got2_addend
;
7373 if (!parameters
->options().relocatable())
7375 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7376 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7377 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7378 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7380 // First instruction of a global dynamic sequence,
7382 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7383 switch (this->optimize_tls_gd(final
))
7385 case tls::TLSOPT_TO_IE
:
7386 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7387 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7389 case tls::TLSOPT_TO_LE
:
7390 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7391 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7392 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7395 r_type
= elfcpp::R_POWERPC_NONE
;
7396 offset
-= 2 * big_endian
;
7403 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7404 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7405 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7406 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7408 // First instruction of a local dynamic sequence,
7410 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7412 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7413 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7415 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7416 const Output_section
* os
= relinfo
->layout
->tls_segment()
7418 gold_assert(os
!= NULL
);
7419 gold_assert(os
->needs_symtab_index());
7420 r_sym
= os
->symtab_index();
7421 addend
= dtp_offset
;
7425 r_type
= elfcpp::R_POWERPC_NONE
;
7426 offset
-= 2 * big_endian
;
7430 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7431 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7432 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7433 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7435 // First instruction of initial exec sequence.
7436 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7437 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7439 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7440 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7441 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7444 r_type
= elfcpp::R_POWERPC_NONE
;
7445 offset
-= 2 * big_endian
;
7449 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7450 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7452 // Second instruction of a global dynamic sequence,
7453 // the __tls_get_addr call
7454 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7455 switch (this->optimize_tls_gd(final
))
7457 case tls::TLSOPT_TO_IE
:
7458 r_type
= elfcpp::R_POWERPC_NONE
;
7461 case tls::TLSOPT_TO_LE
:
7462 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7463 offset
+= 2 * big_endian
;
7470 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7471 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7473 // Second instruction of a local dynamic sequence,
7474 // the __tls_get_addr call
7475 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7477 const Output_section
* os
= relinfo
->layout
->tls_segment()
7479 gold_assert(os
!= NULL
);
7480 gold_assert(os
->needs_symtab_index());
7481 r_sym
= os
->symtab_index();
7482 addend
= dtp_offset
;
7483 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7484 offset
+= 2 * big_endian
;
7488 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7490 // Second instruction of an initial exec sequence
7491 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7492 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7494 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7495 offset
+= 2 * big_endian
;
7500 reloc_write
.put_r_offset(offset
);
7501 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
7502 reloc_write
.put_r_addend(addend
);
7504 pwrite
+= reloc_size
;
7507 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
7508 == reloc_view_size
);
7511 // Return the value to use for a dynamic symbol which requires special
7512 // treatment. This is how we support equality comparisons of function
7513 // pointers across shared library boundaries, as described in the
7514 // processor specific ABI supplement.
7516 template<int size
, bool big_endian
>
7518 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7522 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7523 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7524 p
!= this->stub_tables_
.end();
7527 Address off
= (*p
)->find_plt_call_entry(gsym
);
7528 if (off
!= invalid_address
)
7529 return (*p
)->stub_address() + off
;
7535 // Return the PLT address to use for a local symbol.
7536 template<int size
, bool big_endian
>
7538 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
7539 const Relobj
* object
,
7540 unsigned int symndx
) const
7544 const Sized_relobj
<size
, big_endian
>* relobj
7545 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
7546 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7547 p
!= this->stub_tables_
.end();
7550 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
7552 if (off
!= invalid_address
)
7553 return (*p
)->stub_address() + off
;
7559 // Return the PLT address to use for a global symbol.
7560 template<int size
, bool big_endian
>
7562 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
7563 const Symbol
* gsym
) const
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(gsym
);
7572 if (off
!= invalid_address
)
7573 return (*p
)->stub_address() + off
;
7579 // Return the offset to use for the GOT_INDX'th got entry which is
7580 // for a local tls symbol specified by OBJECT, SYMNDX.
7581 template<int size
, bool big_endian
>
7583 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
7584 const Relobj
* object
,
7585 unsigned int symndx
,
7586 unsigned int got_indx
) const
7588 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7589 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
7590 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
7592 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7593 got_type
<= GOT_TYPE_TPREL
;
7594 got_type
= Got_type(got_type
+ 1))
7595 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
7597 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
7598 if (got_type
== GOT_TYPE_TLSGD
)
7600 if (off
== got_indx
* (size
/ 8))
7602 if (got_type
== GOT_TYPE_TPREL
)
7612 // Return the offset to use for the GOT_INDX'th got entry which is
7613 // for global tls symbol GSYM.
7614 template<int size
, bool big_endian
>
7616 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
7618 unsigned int got_indx
) const
7620 if (gsym
->type() == elfcpp::STT_TLS
)
7622 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7623 got_type
<= GOT_TYPE_TPREL
;
7624 got_type
= Got_type(got_type
+ 1))
7625 if (gsym
->has_got_offset(got_type
))
7627 unsigned int off
= gsym
->got_offset(got_type
);
7628 if (got_type
== GOT_TYPE_TLSGD
)
7630 if (off
== got_indx
* (size
/ 8))
7632 if (got_type
== GOT_TYPE_TPREL
)
7642 // The selector for powerpc object files.
7644 template<int size
, bool big_endian
>
7645 class Target_selector_powerpc
: public Target_selector
7648 Target_selector_powerpc()
7649 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7652 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7653 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7655 ? (big_endian
? "elf64ppc" : "elf64lppc")
7656 : (big_endian
? "elf32ppc" : "elf32lppc")))
7660 do_instantiate_target()
7661 { return new Target_powerpc
<size
, big_endian
>(); }
7664 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7665 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7666 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7667 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7669 // Instantiate these constants for -O0
7670 template<int size
, bool big_endian
>
7671 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7672 template<int size
, bool big_endian
>
7673 const typename Stub_table
<size
, big_endian
>::Address
7674 Stub_table
<size
, big_endian
>::invalid_address
;
7675 template<int size
, bool big_endian
>
7676 const typename Target_powerpc
<size
, big_endian
>::Address
7677 Target_powerpc
<size
, big_endian
>::invalid_address
;
7679 } // End anonymous namespace.