1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size
, bool big_endian
>
51 class Output_data_plt_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_brlt_powerpc
;
56 template<int size
, bool big_endian
>
57 class Output_data_got_powerpc
;
59 template<int size
, bool big_endian
>
60 class Output_data_glink
;
62 template<int size
, bool big_endian
>
66 is_branch_reloc(unsigned int r_type
);
68 template<int size
, bool big_endian
>
69 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
72 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
73 typedef Unordered_set
<Section_id
, Section_id_hash
> Section_refs
;
74 typedef Unordered_map
<Address
, Section_refs
> Access_from
;
76 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
77 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
78 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
79 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
80 opd_ent_(), access_from_map_(), has14_(), stub_table_()
86 // The .got2 section shndx.
91 return this->special_
;
96 // The .opd section shndx.
103 return this->special_
;
106 // Init OPD entry arrays.
108 init_opd(size_t opd_size
)
110 size_t count
= this->opd_ent_ndx(opd_size
);
111 this->opd_ent_
.resize(count
);
114 // Return section and offset of function entry for .opd + R_OFF.
116 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
118 size_t ndx
= this->opd_ent_ndx(r_off
);
119 gold_assert(ndx
< this->opd_ent_
.size());
120 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
122 *value
= this->opd_ent_
[ndx
].off
;
123 return this->opd_ent_
[ndx
].shndx
;
126 // Set section and offset of function entry for .opd + R_OFF.
128 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
130 size_t ndx
= this->opd_ent_ndx(r_off
);
131 gold_assert(ndx
< this->opd_ent_
.size());
132 this->opd_ent_
[ndx
].shndx
= shndx
;
133 this->opd_ent_
[ndx
].off
= value
;
136 // Return discard flag for .opd + R_OFF.
138 get_opd_discard(Address r_off
) const
140 size_t ndx
= this->opd_ent_ndx(r_off
);
141 gold_assert(ndx
< this->opd_ent_
.size());
142 return this->opd_ent_
[ndx
].discard
;
145 // Set discard flag for .opd + R_OFF.
147 set_opd_discard(Address r_off
)
149 size_t ndx
= this->opd_ent_ndx(r_off
);
150 gold_assert(ndx
< this->opd_ent_
.size());
151 this->opd_ent_
[ndx
].discard
= true;
156 { return this->opd_valid_
; }
160 { this->opd_valid_
= true; }
162 // Examine .rela.opd to build info about function entry points.
164 scan_opd_relocs(size_t reloc_count
,
165 const unsigned char* prelocs
,
166 const unsigned char* plocal_syms
);
168 // Perform the Sized_relobj_file method, then set up opd info from
171 do_read_relocs(Read_relocs_data
*);
174 do_find_special_sections(Read_symbols_data
* sd
);
176 // Adjust this local symbol value. Return false if the symbol
177 // should be discarded from the output file.
179 do_adjust_local_symbol(Symbol_value
<size
>* lv
) const
181 if (size
== 64 && this->opd_shndx() != 0)
184 if (lv
->input_shndx(&is_ordinary
) != this->opd_shndx())
186 if (this->get_opd_discard(lv
->input_value()))
194 { return &this->access_from_map_
; }
196 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
197 // section at DST_OFF.
199 add_reference(Object
* src_obj
,
200 unsigned int src_indx
,
201 typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
203 Section_id
src_id(src_obj
, src_indx
);
204 this->access_from_map_
[dst_off
].insert(src_id
);
207 // Add a reference to the code section specified by the .opd entry
210 add_gc_mark(typename
elfcpp::Elf_types
<size
>::Elf_Addr dst_off
)
212 size_t ndx
= this->opd_ent_ndx(dst_off
);
213 if (ndx
>= this->opd_ent_
.size())
214 this->opd_ent_
.resize(ndx
+ 1);
215 this->opd_ent_
[ndx
].gc_mark
= true;
219 process_gc_mark(Symbol_table
* symtab
)
221 for (size_t i
= 0; i
< this->opd_ent_
.size(); i
++)
222 if (this->opd_ent_
[i
].gc_mark
)
224 unsigned int shndx
= this->opd_ent_
[i
].shndx
;
225 symtab
->gc()->worklist().push(Section_id(this, shndx
));
229 // Return offset in output GOT section that this object will use
230 // as a TOC pointer. Won't be just a constant with multi-toc support.
232 toc_base_offset() const
236 set_has_small_toc_reloc()
237 { has_small_toc_reloc_
= true; }
240 has_small_toc_reloc() const
241 { return has_small_toc_reloc_
; }
244 set_has_14bit_branch(unsigned int shndx
)
246 if (shndx
>= this->has14_
.size())
247 this->has14_
.resize(shndx
+ 1);
248 this->has14_
[shndx
] = true;
252 has_14bit_branch(unsigned int shndx
) const
253 { return shndx
< this->has14_
.size() && this->has14_
[shndx
]; }
256 set_stub_table(unsigned int shndx
, Stub_table
<size
, big_endian
>* stub_table
)
258 if (shndx
>= this->stub_table_
.size())
259 this->stub_table_
.resize(shndx
+ 1);
260 this->stub_table_
[shndx
] = stub_table
;
263 Stub_table
<size
, big_endian
>*
264 stub_table(unsigned int shndx
)
266 if (shndx
< this->stub_table_
.size())
267 return this->stub_table_
[shndx
];
280 // Return index into opd_ent_ array for .opd entry at OFF.
281 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
282 // apart when the language doesn't use the last 8-byte word, the
283 // environment pointer. Thus dividing the entry section offset by
284 // 16 will give an index into opd_ent_ that works for either layout
285 // of .opd. (It leaves some elements of the vector unused when .opd
286 // entries are spaced 24 bytes apart, but we don't know the spacing
287 // until relocations are processed, and in any case it is possible
288 // for an object to have some entries spaced 16 bytes apart and
289 // others 24 bytes apart.)
291 opd_ent_ndx(size_t off
) const
294 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
295 unsigned int special_
;
297 // For 64-bit, whether this object uses small model relocs to access
299 bool has_small_toc_reloc_
;
301 // Set at the start of gc_process_relocs, when we know opd_ent_
302 // vector is valid. The flag could be made atomic and set in
303 // do_read_relocs with memory_order_release and then tested with
304 // memory_order_acquire, potentially resulting in fewer entries in
308 // The first 8-byte word of an OPD entry gives the address of the
309 // entry point of the function. Relocatable object files have a
310 // relocation on this word. The following vector records the
311 // section and offset specified by these relocations.
312 std::vector
<Opd_ent
> opd_ent_
;
314 // References made to this object's .opd section when running
315 // gc_process_relocs for another object, before the opd_ent_ vector
316 // is valid for this object.
317 Access_from access_from_map_
;
319 // Whether input section has a 14-bit branch reloc.
320 std::vector
<bool> has14_
;
322 // The stub table to use for a given input section.
323 std::vector
<Stub_table
<size
, big_endian
>*> stub_table_
;
326 template<int size
, bool big_endian
>
327 class Powerpc_dynobj
: public Sized_dynobj
<size
, big_endian
>
330 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
332 Powerpc_dynobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
333 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
334 : Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
335 opd_shndx_(0), opd_ent_()
341 // Call Sized_dynobj::do_read_symbols to read the symbols then
342 // read .opd from a dynamic object, filling in opd_ent_ vector,
344 do_read_symbols(Read_symbols_data
*);
346 // The .opd section shndx.
350 return this->opd_shndx_
;
353 // The .opd section address.
357 return this->opd_address_
;
360 // Init OPD entry arrays.
362 init_opd(size_t opd_size
)
364 size_t count
= this->opd_ent_ndx(opd_size
);
365 this->opd_ent_
.resize(count
);
368 // Return section and offset of function entry for .opd + R_OFF.
370 get_opd_ent(Address r_off
, Address
* value
= NULL
) const
372 size_t ndx
= this->opd_ent_ndx(r_off
);
373 gold_assert(ndx
< this->opd_ent_
.size());
374 gold_assert(this->opd_ent_
[ndx
].shndx
!= 0);
376 *value
= this->opd_ent_
[ndx
].off
;
377 return this->opd_ent_
[ndx
].shndx
;
380 // Set section and offset of function entry for .opd + R_OFF.
382 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
384 size_t ndx
= this->opd_ent_ndx(r_off
);
385 gold_assert(ndx
< this->opd_ent_
.size());
386 this->opd_ent_
[ndx
].shndx
= shndx
;
387 this->opd_ent_
[ndx
].off
= value
;
391 // Used to specify extent of executable sections.
394 Sec_info(Address start_
, Address len_
, unsigned int shndx_
)
395 : start(start_
), len(len_
), shndx(shndx_
)
399 operator<(const Sec_info
& that
) const
400 { return this->start
< that
.start
; }
413 // Return index into opd_ent_ array for .opd entry at OFF.
415 opd_ent_ndx(size_t off
) const
418 // For 64-bit the .opd section shndx and address.
419 unsigned int opd_shndx_
;
420 Address opd_address_
;
422 // The first 8-byte word of an OPD entry gives the address of the
423 // entry point of the function. Records the section and offset
424 // corresponding to the address. Note that in dynamic objects,
425 // offset is *not* relative to the section.
426 std::vector
<Opd_ent
> opd_ent_
;
429 template<int size
, bool big_endian
>
430 class Target_powerpc
: public Sized_target
<size
, big_endian
>
434 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
435 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
436 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
437 static const Address invalid_address
= static_cast<Address
>(0) - 1;
438 // Offset of tp and dtp pointers from start of TLS block.
439 static const Address tp_offset
= 0x7000;
440 static const Address dtp_offset
= 0x8000;
443 : Sized_target
<size
, big_endian
>(&powerpc_info
),
444 got_(NULL
), plt_(NULL
), iplt_(NULL
), brlt_section_(NULL
),
445 glink_(NULL
), rela_dyn_(NULL
), copy_relocs_(elfcpp::R_POWERPC_COPY
),
446 dynbss_(NULL
), tlsld_got_offset_(-1U),
447 stub_tables_(), branch_lookup_table_(), branch_info_(),
448 plt_thread_safe_(false)
452 // Process the relocations to determine unreferenced sections for
453 // garbage collection.
455 gc_process_relocs(Symbol_table
* symtab
,
457 Sized_relobj_file
<size
, big_endian
>* object
,
458 unsigned int data_shndx
,
459 unsigned int sh_type
,
460 const unsigned char* prelocs
,
462 Output_section
* output_section
,
463 bool needs_special_offset_handling
,
464 size_t local_symbol_count
,
465 const unsigned char* plocal_symbols
);
467 // Scan the relocations to look for symbol adjustments.
469 scan_relocs(Symbol_table
* symtab
,
471 Sized_relobj_file
<size
, big_endian
>* object
,
472 unsigned int data_shndx
,
473 unsigned int sh_type
,
474 const unsigned char* prelocs
,
476 Output_section
* output_section
,
477 bool needs_special_offset_handling
,
478 size_t local_symbol_count
,
479 const unsigned char* plocal_symbols
);
481 // Map input .toc section to output .got section.
483 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
485 if (size
== 64 && strcmp(name
, ".toc") == 0)
493 // Provide linker defined save/restore functions.
495 define_save_restore_funcs(Layout
*, Symbol_table
*);
497 // No stubs unless a final link.
500 { return !parameters
->options().relocatable(); }
503 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
506 do_plt_fde_location(const Output_data
*, unsigned char*,
507 uint64_t*, off_t
*) const;
509 // Stash info about branches, for stub generation.
511 push_branch(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
512 unsigned int data_shndx
, Address r_offset
,
513 unsigned int r_type
, unsigned int r_sym
, Address addend
)
515 Branch_info
info(ppc_object
, data_shndx
, r_offset
, r_type
, r_sym
, addend
);
516 this->branch_info_
.push_back(info
);
517 if (r_type
== elfcpp::R_POWERPC_REL14
518 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
519 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
520 ppc_object
->set_has_14bit_branch(data_shndx
);
523 Stub_table
<size
, big_endian
>*
527 do_define_standard_symbols(Symbol_table
*, Layout
*);
529 // Finalize the sections.
531 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
533 // Return the value to use for a dynamic which requires special
536 do_dynsym_value(const Symbol
*) const;
538 // Return the PLT address to use for a local symbol.
540 do_plt_address_for_local(const Relobj
*, unsigned int) const;
542 // Return the PLT address to use for a global symbol.
544 do_plt_address_for_global(const Symbol
*) const;
546 // Return the offset to use for the GOT_INDX'th got entry which is
547 // for a local tls symbol specified by OBJECT, SYMNDX.
549 do_tls_offset_for_local(const Relobj
* object
,
551 unsigned int got_indx
) const;
553 // Return the offset to use for the GOT_INDX'th got entry which is
554 // for global tls symbol GSYM.
556 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
559 do_function_location(Symbol_location
*) const;
562 do_can_check_for_function_pointers() const
565 // Relocate a section.
567 relocate_section(const Relocate_info
<size
, big_endian
>*,
568 unsigned int sh_type
,
569 const unsigned char* prelocs
,
571 Output_section
* output_section
,
572 bool needs_special_offset_handling
,
574 Address view_address
,
575 section_size_type view_size
,
576 const Reloc_symbol_changes
*);
578 // Scan the relocs during a relocatable link.
580 scan_relocatable_relocs(Symbol_table
* symtab
,
582 Sized_relobj_file
<size
, big_endian
>* object
,
583 unsigned int data_shndx
,
584 unsigned int sh_type
,
585 const unsigned char* prelocs
,
587 Output_section
* output_section
,
588 bool needs_special_offset_handling
,
589 size_t local_symbol_count
,
590 const unsigned char* plocal_symbols
,
591 Relocatable_relocs
*);
593 // Emit relocations for a section.
595 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
596 unsigned int sh_type
,
597 const unsigned char* prelocs
,
599 Output_section
* output_section
,
600 typename
elfcpp::Elf_types
<size
>::Elf_Off
601 offset_in_output_section
,
602 const Relocatable_relocs
*,
604 Address view_address
,
606 unsigned char* reloc_view
,
607 section_size_type reloc_view_size
);
609 // Return whether SYM is defined by the ABI.
611 do_is_defined_by_abi(const Symbol
* sym
) const
613 return strcmp(sym
->name(), "__tls_get_addr") == 0;
616 // Return the size of the GOT section.
620 gold_assert(this->got_
!= NULL
);
621 return this->got_
->data_size();
624 // Get the PLT section.
625 const Output_data_plt_powerpc
<size
, big_endian
>*
628 gold_assert(this->plt_
!= NULL
);
632 // Get the IPLT section.
633 const Output_data_plt_powerpc
<size
, big_endian
>*
636 gold_assert(this->iplt_
!= NULL
);
640 // Get the .glink section.
641 const Output_data_glink
<size
, big_endian
>*
642 glink_section() const
644 gold_assert(this->glink_
!= NULL
);
648 bool has_glink() const
649 { return this->glink_
!= NULL
; }
651 // Get the GOT section.
652 const Output_data_got_powerpc
<size
, big_endian
>*
655 gold_assert(this->got_
!= NULL
);
659 // Get the GOT section, creating it if necessary.
660 Output_data_got_powerpc
<size
, big_endian
>*
661 got_section(Symbol_table
*, Layout
*);
664 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
665 const elfcpp::Ehdr
<size
, big_endian
>&);
667 // Return the number of entries in the GOT.
669 got_entry_count() const
671 if (this->got_
== NULL
)
673 return this->got_size() / (size
/ 8);
676 // Return the number of entries in the PLT.
678 plt_entry_count() const;
680 // Return the offset of the first non-reserved PLT entry.
682 first_plt_entry_offset() const;
684 // Return the size of each PLT entry.
686 plt_entry_size() const;
688 // Add any special sections for this symbol to the gc work list.
689 // For powerpc64, this adds the code section of a function
692 do_gc_mark_symbol(Symbol_table
* symtab
, Symbol
* sym
) const;
694 // Handle target specific gc actions when adding a gc reference from
695 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
696 // and DST_OFF. For powerpc64, this adds a referenc to the code
697 // section of a function descriptor.
699 do_gc_add_reference(Symbol_table
* symtab
,
701 unsigned int src_shndx
,
703 unsigned int dst_shndx
,
704 Address dst_off
) const;
706 typedef std::vector
<Stub_table
<size
, big_endian
>*> Stub_tables
;
709 { return this->stub_tables_
; }
711 const Output_data_brlt_powerpc
<size
, big_endian
>*
713 { return this->brlt_section_
; }
716 add_branch_lookup_table(Address to
)
718 unsigned int off
= this->branch_lookup_table_
.size() * (size
/ 8);
719 this->branch_lookup_table_
.insert(std::make_pair(to
, off
));
723 find_branch_lookup_table(Address to
)
725 typename
Branch_lookup_table::const_iterator p
726 = this->branch_lookup_table_
.find(to
);
727 return p
== this->branch_lookup_table_
.end() ? invalid_address
: p
->second
;
731 write_branch_lookup_table(unsigned char *oview
)
733 for (typename
Branch_lookup_table::const_iterator p
734 = this->branch_lookup_table_
.begin();
735 p
!= this->branch_lookup_table_
.end();
738 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ p
->second
, p
->first
);
743 plt_thread_safe() const
744 { return this->plt_thread_safe_
; }
760 : tls_get_addr_(NOT_EXPECTED
),
761 relinfo_(NULL
), relnum_(0), r_offset_(0)
766 if (this->tls_get_addr_
!= NOT_EXPECTED
)
773 if (this->relinfo_
!= NULL
)
774 gold_error_at_location(this->relinfo_
, this->relnum_
, this->r_offset_
,
775 _("missing expected __tls_get_addr call"));
779 expect_tls_get_addr_call(
780 const Relocate_info
<size
, big_endian
>* relinfo
,
784 this->tls_get_addr_
= EXPECTED
;
785 this->relinfo_
= relinfo
;
786 this->relnum_
= relnum
;
787 this->r_offset_
= r_offset
;
791 expect_tls_get_addr_call()
792 { this->tls_get_addr_
= EXPECTED
; }
795 skip_next_tls_get_addr_call()
796 {this->tls_get_addr_
= SKIP
; }
799 maybe_skip_tls_get_addr_call(unsigned int r_type
, const Symbol
* gsym
)
801 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
802 || r_type
== elfcpp::R_PPC_PLTREL24
)
804 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
805 Tls_get_addr last_tls
= this->tls_get_addr_
;
806 this->tls_get_addr_
= NOT_EXPECTED
;
807 if (is_tls_call
&& last_tls
!= EXPECTED
)
809 else if (!is_tls_call
&& last_tls
!= NOT_EXPECTED
)
818 // What we're up to regarding calls to __tls_get_addr.
819 // On powerpc, the branch and link insn making a call to
820 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
821 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
822 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
823 // The marker relocation always comes first, and has the same
824 // symbol as the reloc on the insn setting up the __tls_get_addr
825 // argument. This ties the arg setup insn with the call insn,
826 // allowing ld to safely optimize away the call. We check that
827 // every call to __tls_get_addr has a marker relocation, and that
828 // every marker relocation is on a call to __tls_get_addr.
829 Tls_get_addr tls_get_addr_
;
830 // Info about the last reloc for error message.
831 const Relocate_info
<size
, big_endian
>* relinfo_
;
836 // The class which scans relocations.
837 class Scan
: protected Track_tls
840 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
843 : Track_tls(), issued_non_pic_error_(false)
847 get_reference_flags(unsigned int r_type
);
850 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
851 Sized_relobj_file
<size
, big_endian
>* object
,
852 unsigned int data_shndx
,
853 Output_section
* output_section
,
854 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
855 const elfcpp::Sym
<size
, big_endian
>& lsym
,
859 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
860 Sized_relobj_file
<size
, big_endian
>* object
,
861 unsigned int data_shndx
,
862 Output_section
* output_section
,
863 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
867 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
869 Sized_relobj_file
<size
, big_endian
>* ,
872 const elfcpp::Rela
<size
, big_endian
>& ,
874 const elfcpp::Sym
<size
, big_endian
>&)
876 // PowerPC64 .opd is not folded, so any identical function text
877 // may be folded and we'll still keep function addresses distinct.
878 // That means no reloc is of concern here.
881 // For 32-bit, conservatively assume anything but calls to
882 // function code might be taking the address of the function.
883 return !is_branch_reloc(r_type
);
887 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
889 Sized_relobj_file
<size
, big_endian
>* ,
892 const elfcpp::Rela
<size
, big_endian
>& ,
899 return !is_branch_reloc(r_type
);
903 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, big_endian
>* object
,
904 unsigned int r_type
, bool report_err
);
908 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
909 unsigned int r_type
);
912 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
913 unsigned int r_type
, Symbol
*);
916 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
917 Target_powerpc
* target
);
920 check_non_pic(Relobj
*, unsigned int r_type
);
922 // Whether we have issued an error about a non-PIC compilation.
923 bool issued_non_pic_error_
;
927 symval_for_branch(const Symbol_table
* symtab
, Address value
,
928 const Sized_symbol
<size
>* gsym
,
929 Powerpc_relobj
<size
, big_endian
>* object
,
930 unsigned int *dest_shndx
);
932 // The class which implements relocation.
933 class Relocate
: protected Track_tls
936 // Use 'at' branch hints when true, 'y' when false.
937 // FIXME maybe: set this with an option.
938 static const bool is_isa_v2
= true;
944 // Do a relocation. Return false if the caller should not issue
945 // any warnings about this relocation.
947 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
948 Output_section
*, size_t relnum
,
949 const elfcpp::Rela
<size
, big_endian
>&,
950 unsigned int r_type
, const Sized_symbol
<size
>*,
951 const Symbol_value
<size
>*,
953 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
957 class Relocate_comdat_behavior
960 // Decide what the linker should do for relocations that refer to
961 // discarded comdat sections.
962 inline Comdat_behavior
963 get(const char* name
)
965 gold::Default_comdat_behavior default_behavior
;
966 Comdat_behavior ret
= default_behavior
.get(name
);
967 if (ret
== CB_WARNING
)
970 && (strcmp(name
, ".fixup") == 0
971 || strcmp(name
, ".got2") == 0))
974 && (strcmp(name
, ".opd") == 0
975 || strcmp(name
, ".toc") == 0
976 || strcmp(name
, ".toc1") == 0))
983 // A class which returns the size required for a relocation type,
984 // used while scanning relocs during a relocatable link.
985 class Relocatable_size_for_reloc
989 get_size_for_reloc(unsigned int, Relobj
*)
996 // Optimize the TLS relocation type based on what we know about the
997 // symbol. IS_FINAL is true if the final address of this symbol is
998 // known at link time.
1000 tls::Tls_optimization
1001 optimize_tls_gd(bool is_final
)
1003 // If we are generating a shared library, then we can't do anything
1005 if (parameters
->options().shared())
1006 return tls::TLSOPT_NONE
;
1009 return tls::TLSOPT_TO_IE
;
1010 return tls::TLSOPT_TO_LE
;
1013 tls::Tls_optimization
1016 if (parameters
->options().shared())
1017 return tls::TLSOPT_NONE
;
1019 return tls::TLSOPT_TO_LE
;
1022 tls::Tls_optimization
1023 optimize_tls_ie(bool is_final
)
1025 if (!is_final
|| parameters
->options().shared())
1026 return tls::TLSOPT_NONE
;
1028 return tls::TLSOPT_TO_LE
;
1033 make_glink_section(Layout
*);
1035 // Create the PLT section.
1037 make_plt_section(Symbol_table
*, Layout
*);
1040 make_iplt_section(Symbol_table
*, Layout
*);
1043 make_brlt_section(Layout
*);
1045 // Create a PLT entry for a global symbol.
1047 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
1049 // Create a PLT entry for a local IFUNC symbol.
1051 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
1052 Sized_relobj_file
<size
, big_endian
>*,
1056 // Create a GOT entry for local dynamic __tls_get_addr.
1058 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
1059 Sized_relobj_file
<size
, big_endian
>* object
);
1062 tlsld_got_offset() const
1064 return this->tlsld_got_offset_
;
1067 // Get the dynamic reloc section, creating it if necessary.
1069 rela_dyn_section(Layout
*);
1071 // Similarly, but for ifunc symbols get the one for ifunc.
1073 rela_dyn_section(Symbol_table
*, Layout
*, bool for_ifunc
);
1075 // Copy a relocation against a global symbol.
1077 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
1078 Sized_relobj_file
<size
, big_endian
>* object
,
1079 unsigned int shndx
, Output_section
* output_section
,
1080 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
1082 this->copy_relocs_
.copy_reloc(symtab
, layout
,
1083 symtab
->get_sized_symbol
<size
>(sym
),
1084 object
, shndx
, output_section
,
1085 reloc
, this->rela_dyn_section(layout
));
1088 // Look over all the input sections, deciding where to place stubs.
1090 group_sections(Layout
*, const Task
*);
1092 // Sort output sections by address.
1093 struct Sort_sections
1096 operator()(const Output_section
* sec1
, const Output_section
* sec2
)
1097 { return sec1
->address() < sec2
->address(); }
1103 Branch_info(Powerpc_relobj
<size
, big_endian
>* ppc_object
,
1104 unsigned int data_shndx
,
1106 unsigned int r_type
,
1109 : object_(ppc_object
), shndx_(data_shndx
), offset_(r_offset
),
1110 r_type_(r_type
), r_sym_(r_sym
), addend_(addend
)
1116 // If this branch needs a plt call stub, or a long branch stub, make one.
1118 make_stub(Stub_table
<size
, big_endian
>*,
1119 Stub_table
<size
, big_endian
>*,
1120 Symbol_table
*) const;
1123 // The branch location..
1124 Powerpc_relobj
<size
, big_endian
>* object_
;
1125 unsigned int shndx_
;
1127 // ..and the branch type and destination.
1128 unsigned int r_type_
;
1129 unsigned int r_sym_
;
1133 // Information about this specific target which we pass to the
1134 // general Target structure.
1135 static Target::Target_info powerpc_info
;
1137 // The types of GOT entries needed for this platform.
1138 // These values are exposed to the ABI in an incremental link.
1139 // Do not renumber existing values without changing the version
1140 // number of the .gnu_incremental_inputs section.
1144 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
1145 GOT_TYPE_DTPREL
, // entry for @got@dtprel
1146 GOT_TYPE_TPREL
// entry for @got@tprel
1150 Output_data_got_powerpc
<size
, big_endian
>* got_
;
1151 // The PLT section. This is a container for a table of addresses,
1152 // and their relocations. Each address in the PLT has a dynamic
1153 // relocation (R_*_JMP_SLOT) and each address will have a
1154 // corresponding entry in .glink for lazy resolution of the PLT.
1155 // ppc32 initialises the PLT to point at the .glink entry, while
1156 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1157 // linker adds a stub that loads the PLT entry into ctr then
1158 // branches to ctr. There may be more than one stub for each PLT
1159 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1160 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1161 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
1162 // The IPLT section. Like plt_, this is a container for a table of
1163 // addresses and their relocations, specifically for STT_GNU_IFUNC
1164 // functions that resolve locally (STT_GNU_IFUNC functions that
1165 // don't resolve locally go in PLT). Unlike plt_, these have no
1166 // entry in .glink for lazy resolution, and the relocation section
1167 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1168 // the relocation section may contain relocations against
1169 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1170 // relocation section will appear at the end of other dynamic
1171 // relocations, so that ld.so applies these relocations after other
1172 // dynamic relocations. In a static executable, the relocation
1173 // section is emitted and marked with __rela_iplt_start and
1174 // __rela_iplt_end symbols.
1175 Output_data_plt_powerpc
<size
, big_endian
>* iplt_
;
1176 // Section holding long branch destinations.
1177 Output_data_brlt_powerpc
<size
, big_endian
>* brlt_section_
;
1178 // The .glink section.
1179 Output_data_glink
<size
, big_endian
>* glink_
;
1180 // The dynamic reloc section.
1181 Reloc_section
* rela_dyn_
;
1182 // Relocs saved to avoid a COPY reloc.
1183 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
1184 // Space for variables copied with a COPY reloc.
1185 Output_data_space
* dynbss_
;
1186 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1187 unsigned int tlsld_got_offset_
;
1189 Stub_tables stub_tables_
;
1190 typedef Unordered_map
<Address
, unsigned int> Branch_lookup_table
;
1191 Branch_lookup_table branch_lookup_table_
;
1193 typedef std::vector
<Branch_info
> Branches
;
1194 Branches branch_info_
;
1196 bool plt_thread_safe_
;
1200 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
1203 true, // is_big_endian
1204 elfcpp::EM_PPC
, // machine_code
1205 false, // has_make_symbol
1206 false, // has_resolve
1207 false, // has_code_fill
1208 true, // is_default_stack_executable
1209 false, // can_icf_inline_merge_sections
1211 "/usr/lib/ld.so.1", // dynamic_linker
1212 0x10000000, // default_text_segment_address
1213 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1214 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1215 false, // isolate_execinstr
1217 elfcpp::SHN_UNDEF
, // small_common_shndx
1218 elfcpp::SHN_UNDEF
, // large_common_shndx
1219 0, // small_common_section_flags
1220 0, // large_common_section_flags
1221 NULL
, // attributes_section
1222 NULL
// attributes_vendor
1226 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
1229 false, // is_big_endian
1230 elfcpp::EM_PPC
, // machine_code
1231 false, // has_make_symbol
1232 false, // has_resolve
1233 false, // has_code_fill
1234 true, // is_default_stack_executable
1235 false, // can_icf_inline_merge_sections
1237 "/usr/lib/ld.so.1", // dynamic_linker
1238 0x10000000, // default_text_segment_address
1239 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1240 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1241 false, // isolate_execinstr
1243 elfcpp::SHN_UNDEF
, // small_common_shndx
1244 elfcpp::SHN_UNDEF
, // large_common_shndx
1245 0, // small_common_section_flags
1246 0, // large_common_section_flags
1247 NULL
, // attributes_section
1248 NULL
// attributes_vendor
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
1278 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
1281 false, // is_big_endian
1282 elfcpp::EM_PPC64
, // machine_code
1283 false, // has_make_symbol
1284 false, // has_resolve
1285 false, // has_code_fill
1286 true, // is_default_stack_executable
1287 false, // can_icf_inline_merge_sections
1289 "/usr/lib/ld.so.1", // dynamic_linker
1290 0x10000000, // default_text_segment_address
1291 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1292 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1293 false, // isolate_execinstr
1295 elfcpp::SHN_UNDEF
, // small_common_shndx
1296 elfcpp::SHN_UNDEF
, // large_common_shndx
1297 0, // small_common_section_flags
1298 0, // large_common_section_flags
1299 NULL
, // attributes_section
1300 NULL
// attributes_vendor
1304 is_branch_reloc(unsigned int r_type
)
1306 return (r_type
== elfcpp::R_POWERPC_REL24
1307 || r_type
== elfcpp::R_PPC_PLTREL24
1308 || r_type
== elfcpp::R_PPC_LOCAL24PC
1309 || r_type
== elfcpp::R_POWERPC_REL14
1310 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
1311 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
1312 || r_type
== elfcpp::R_POWERPC_ADDR24
1313 || r_type
== elfcpp::R_POWERPC_ADDR14
1314 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
1315 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
1318 // If INSN is an opcode that may be used with an @tls operand, return
1319 // the transformed insn for TLS optimisation, otherwise return 0. If
1320 // REG is non-zero only match an insn with RB or RA equal to REG.
1322 at_tls_transform(uint32_t insn
, unsigned int reg
)
1324 if ((insn
& (0x3f << 26)) != 31 << 26)
1328 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
1329 rtra
= insn
& ((1 << 26) - (1 << 16));
1330 else if (((insn
>> 16) & 0x1f) == reg
)
1331 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
1335 if ((insn
& (0x3ff << 1)) == 266 << 1)
1338 else if ((insn
& (0x1f << 1)) == 23 << 1
1339 && ((insn
& (0x1f << 6)) < 14 << 6
1340 || ((insn
& (0x1f << 6)) >= 16 << 6
1341 && (insn
& (0x1f << 6)) < 24 << 6)))
1342 // load and store indexed -> dform
1343 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
1344 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1345 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1346 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
1347 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1349 insn
= (58 << 26) | 2;
1356 // Modified version of symtab.h class Symbol member
1357 // Given a direct absolute or pc-relative static relocation against
1358 // the global symbol, this function returns whether a dynamic relocation
1363 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
1365 // No dynamic relocations in a static link!
1366 if (parameters
->doing_static_link())
1369 // A reference to an undefined symbol from an executable should be
1370 // statically resolved to 0, and does not need a dynamic relocation.
1371 // This matches gnu ld behavior.
1372 if (gsym
->is_undefined() && !parameters
->options().shared())
1375 // A reference to an absolute symbol does not need a dynamic relocation.
1376 if (gsym
->is_absolute())
1379 // An absolute reference within a position-independent output file
1380 // will need a dynamic relocation.
1381 if ((flags
& Symbol::ABSOLUTE_REF
)
1382 && parameters
->options().output_is_position_independent())
1385 // A function call that can branch to a local PLT entry does not need
1386 // a dynamic relocation.
1387 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
1390 // A reference to any PLT entry in a non-position-independent executable
1391 // does not need a dynamic relocation.
1392 // Except due to having function descriptors on powerpc64 we don't define
1393 // functions to their plt code in an executable, so this doesn't apply.
1395 && !parameters
->options().output_is_position_independent()
1396 && gsym
->has_plt_offset())
1399 // A reference to a symbol defined in a dynamic object or to a
1400 // symbol that is preemptible will need a dynamic relocation.
1401 if (gsym
->is_from_dynobj()
1402 || gsym
->is_undefined()
1403 || gsym
->is_preemptible())
1406 // For all other cases, return FALSE.
1410 // Modified version of symtab.h class Symbol member
1411 // Whether we should use the PLT offset associated with a symbol for
1412 // a relocation. FLAGS is a set of Reference_flags.
1416 use_plt_offset(const Symbol
* gsym
, int flags
)
1418 // If the symbol doesn't have a PLT offset, then naturally we
1419 // don't want to use it.
1420 if (!gsym
->has_plt_offset())
1423 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1424 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1427 // If we are going to generate a dynamic relocation, then we will
1428 // wind up using that, so no need to use the PLT entry.
1429 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
1432 // If the symbol is from a dynamic object, we need to use the PLT
1434 if (gsym
->is_from_dynobj())
1437 // If we are generating a shared object, and this symbol is
1438 // undefined or preemptible, we need to use the PLT entry.
1439 if (parameters
->options().shared()
1440 && (gsym
->is_undefined() || gsym
->is_preemptible()))
1443 // If this is a call to a weak undefined symbol, we need to use
1444 // the PLT entry; the symbol may be defined by a library loaded
1446 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
1449 // Otherwise we can use the regular definition.
1453 template<int size
, bool big_endian
>
1454 class Powerpc_relocate_functions
1471 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
1472 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1474 template<int valsize
>
1476 has_overflow_signed(Address value
)
1478 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1479 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1480 limit
<<= ((valsize
- 1) >> 1);
1481 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1482 return value
+ limit
> (limit
<< 1) - 1;
1485 template<int valsize
>
1487 has_overflow_bitfield(Address value
)
1489 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
1490 limit
<<= ((valsize
- 1) >> 1);
1491 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
1492 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
1495 template<int valsize
>
1496 static inline Status
1497 overflowed(Address value
, Overflow_check overflow
)
1499 if (overflow
== CHECK_SIGNED
)
1501 if (has_overflow_signed
<valsize
>(value
))
1502 return STATUS_OVERFLOW
;
1504 else if (overflow
== CHECK_BITFIELD
)
1506 if (has_overflow_bitfield
<valsize
>(value
))
1507 return STATUS_OVERFLOW
;
1512 // Do a simple RELA relocation
1513 template<int valsize
>
1514 static inline Status
1515 rela(unsigned char* view
, Address value
, Overflow_check overflow
)
1517 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1518 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1519 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
1520 return overflowed
<valsize
>(value
, overflow
);
1523 template<int valsize
>
1524 static inline Status
1525 rela(unsigned char* view
,
1526 unsigned int right_shift
,
1527 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1529 Overflow_check overflow
)
1531 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
1532 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
1533 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
1534 Valtype reloc
= value
>> right_shift
;
1537 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
1538 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1541 // Do a simple RELA relocation, unaligned.
1542 template<int valsize
>
1543 static inline Status
1544 rela_ua(unsigned char* view
, Address value
, Overflow_check overflow
)
1546 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
1547 return overflowed
<valsize
>(value
, overflow
);
1550 template<int valsize
>
1551 static inline Status
1552 rela_ua(unsigned char* view
,
1553 unsigned int right_shift
,
1554 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
1556 Overflow_check overflow
)
1558 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
1560 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
1561 Valtype reloc
= value
>> right_shift
;
1564 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
1565 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
1569 // R_PPC64_ADDR64: (Symbol + Addend)
1571 addr64(unsigned char* view
, Address value
)
1572 { This::template rela
<64>(view
, value
, CHECK_NONE
); }
1574 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1576 addr64_u(unsigned char* view
, Address value
)
1577 { This::template rela_ua
<64>(view
, value
, CHECK_NONE
); }
1579 // R_POWERPC_ADDR32: (Symbol + Addend)
1580 static inline Status
1581 addr32(unsigned char* view
, Address value
, Overflow_check overflow
)
1582 { return This::template rela
<32>(view
, value
, overflow
); }
1584 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1585 static inline Status
1586 addr32_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1587 { return This::template rela_ua
<32>(view
, value
, overflow
); }
1589 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1590 static inline Status
1591 addr24(unsigned char* view
, Address value
, Overflow_check overflow
)
1593 Status stat
= This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
1594 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1595 stat
= STATUS_OVERFLOW
;
1599 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1600 static inline Status
1601 addr16(unsigned char* view
, Address value
, Overflow_check overflow
)
1602 { return This::template rela
<16>(view
, value
, overflow
); }
1604 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1605 static inline Status
1606 addr16_u(unsigned char* view
, Address value
, Overflow_check overflow
)
1607 { return This::template rela_ua
<16>(view
, value
, overflow
); }
1609 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1610 static inline Status
1611 addr16_ds(unsigned char* view
, Address value
, Overflow_check overflow
)
1613 Status stat
= This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1614 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1615 stat
= STATUS_OVERFLOW
;
1619 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1621 addr16_hi(unsigned char* view
, Address value
)
1622 { This::template rela
<16>(view
, 16, 0xffff, value
, CHECK_NONE
); }
1624 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1626 addr16_ha(unsigned char* view
, Address value
)
1627 { This::addr16_hi(view
, value
+ 0x8000); }
1629 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1631 addr16_hi2(unsigned char* view
, Address value
)
1632 { This::template rela
<16>(view
, 32, 0xffff, value
, CHECK_NONE
); }
1634 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1636 addr16_ha2(unsigned char* view
, Address value
)
1637 { This::addr16_hi2(view
, value
+ 0x8000); }
1639 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1641 addr16_hi3(unsigned char* view
, Address value
)
1642 { This::template rela
<16>(view
, 48, 0xffff, value
, CHECK_NONE
); }
1644 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1646 addr16_ha3(unsigned char* view
, Address value
)
1647 { This::addr16_hi3(view
, value
+ 0x8000); }
1649 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1650 static inline Status
1651 addr14(unsigned char* view
, Address value
, Overflow_check overflow
)
1653 Status stat
= This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1654 if (overflow
!= CHECK_NONE
&& (value
& 3) != 0)
1655 stat
= STATUS_OVERFLOW
;
1660 // Stash away the index of .got2 or .opd in a relocatable object, if
1661 // such a section exists.
1663 template<int size
, bool big_endian
>
1665 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1666 Read_symbols_data
* sd
)
1668 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1669 const unsigned char* namesu
= sd
->section_names
->data();
1670 const char* names
= reinterpret_cast<const char*>(namesu
);
1671 section_size_type names_size
= sd
->section_names_size
;
1672 const unsigned char* s
;
1674 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
,
1675 size
== 32 ? ".got2" : ".opd",
1676 names
, names_size
, NULL
);
1679 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1680 this->special_
= ndx
;
1682 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1685 // Examine .rela.opd to build info about function entry points.
1687 template<int size
, bool big_endian
>
1689 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1691 const unsigned char* prelocs
,
1692 const unsigned char* plocal_syms
)
1696 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1698 const int reloc_size
1699 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1700 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1701 Address expected_off
= 0;
1702 bool regular
= true;
1703 unsigned int opd_ent_size
= 0;
1705 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1707 Reltype
reloc(prelocs
);
1708 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1709 = reloc
.get_r_info();
1710 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1711 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1713 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1714 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1717 if (r_sym
< this->local_symbol_count())
1719 typename
elfcpp::Sym
<size
, big_endian
>
1720 lsym(plocal_syms
+ r_sym
* sym_size
);
1721 shndx
= lsym
.get_st_shndx();
1722 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1723 value
= lsym
.get_st_value();
1726 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1728 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1729 value
+ reloc
.get_r_addend());
1732 expected_off
= reloc
.get_r_offset();
1733 opd_ent_size
= expected_off
;
1735 else if (expected_off
!= reloc
.get_r_offset())
1737 expected_off
+= opd_ent_size
;
1739 else if (r_type
== elfcpp::R_PPC64_TOC
)
1741 if (expected_off
- opd_ent_size
+ 8 != reloc
.get_r_offset())
1746 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1747 this->name().c_str(), r_type
);
1751 if (reloc_count
<= 2)
1752 opd_ent_size
= this->section_size(this->opd_shndx());
1753 if (opd_ent_size
!= 24 && opd_ent_size
!= 16)
1757 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1758 this->name().c_str());
1764 template<int size
, bool big_endian
>
1766 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1768 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1771 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1772 p
!= rd
->relocs
.end();
1775 if (p
->data_shndx
== this->opd_shndx())
1777 uint64_t opd_size
= this->section_size(this->opd_shndx());
1778 gold_assert(opd_size
== static_cast<size_t>(opd_size
));
1781 this->init_opd(opd_size
);
1782 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1783 rd
->local_symbols
->data());
1791 // Call Sized_dynobj::do_read_symbols to read the symbols then
1792 // read .opd from a dynamic object, filling in opd_ent_ vector,
1794 template<int size
, bool big_endian
>
1796 Powerpc_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
1798 Sized_dynobj
<size
, big_endian
>::do_read_symbols(sd
);
1801 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1802 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1803 const unsigned char* namesu
= sd
->section_names
->data();
1804 const char* names
= reinterpret_cast<const char*>(namesu
);
1805 const unsigned char* s
= NULL
;
1806 const unsigned char* opd
;
1807 section_size_type opd_size
;
1809 // Find and read .opd section.
1812 s
= this->template find_shdr
<size
, big_endian
>(pshdrs
, ".opd", names
,
1813 sd
->section_names_size
,
1818 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1819 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1820 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1822 this->opd_shndx_
= (s
- pshdrs
) / shdr_size
;
1823 this->opd_address_
= shdr
.get_sh_addr();
1824 opd_size
= convert_to_section_size_type(shdr
.get_sh_size());
1825 opd
= this->get_view(shdr
.get_sh_offset(), opd_size
,
1831 // Build set of executable sections.
1832 // Using a set is probably overkill. There is likely to be only
1833 // a few executable sections, typically .init, .text and .fini,
1834 // and they are generally grouped together.
1835 typedef std::set
<Sec_info
> Exec_sections
;
1836 Exec_sections exec_sections
;
1838 for (unsigned int i
= 1; i
< this->shnum(); ++i
, s
+= shdr_size
)
1840 typename
elfcpp::Shdr
<size
, big_endian
> shdr(s
);
1841 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
1842 && ((shdr
.get_sh_flags()
1843 & (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1844 == (elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
))
1845 && shdr
.get_sh_size() != 0)
1847 exec_sections
.insert(Sec_info(shdr
.get_sh_addr(),
1848 shdr
.get_sh_size(), i
));
1851 if (exec_sections
.empty())
1854 // Look over the OPD entries. This is complicated by the fact
1855 // that some binaries will use two-word entries while others
1856 // will use the standard three-word entries. In most cases
1857 // the third word (the environment pointer for languages like
1858 // Pascal) is unused and will be zero. If the third word is
1859 // used it should not be pointing into executable sections,
1861 this->init_opd(opd_size
);
1862 for (const unsigned char* p
= opd
; p
< opd
+ opd_size
; p
+= 8)
1864 typedef typename
elfcpp::Swap
<64, big_endian
>::Valtype Valtype
;
1865 const Valtype
* valp
= reinterpret_cast<const Valtype
*>(p
);
1866 Valtype val
= elfcpp::Swap
<64, big_endian
>::readval(valp
);
1868 // Chances are that this is the third word of an OPD entry.
1870 typename
Exec_sections::const_iterator e
1871 = exec_sections
.upper_bound(Sec_info(val
, 0, 0));
1872 if (e
!= exec_sections
.begin())
1875 if (e
->start
<= val
&& val
< e
->start
+ e
->len
)
1877 // We have an address in an executable section.
1878 // VAL ought to be the function entry, set it up.
1879 this->set_opd_ent(p
- opd
, e
->shndx
, val
);
1880 // Skip second word of OPD entry, the TOC pointer.
1884 // If we didn't match any executable sections, we likely
1885 // have a non-zero third word in the OPD entry.
1890 // Set up some symbols.
1892 template<int size
, bool big_endian
>
1894 Target_powerpc
<size
, big_endian
>::do_define_standard_symbols(
1895 Symbol_table
* symtab
,
1900 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1901 // undefined when scanning relocs (and thus requires
1902 // non-relative dynamic relocs). The proper value will be
1904 Symbol
*gotsym
= symtab
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
1905 if (gotsym
!= NULL
&& gotsym
->is_undefined())
1907 Target_powerpc
<size
, big_endian
>* target
=
1908 static_cast<Target_powerpc
<size
, big_endian
>*>(
1909 parameters
->sized_target
<size
, big_endian
>());
1910 Output_data_got_powerpc
<size
, big_endian
>* got
1911 = target
->got_section(symtab
, layout
);
1912 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1913 Symbol_table::PREDEFINED
,
1917 elfcpp::STV_HIDDEN
, 0,
1921 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1922 Symbol
*sdasym
= symtab
->lookup("_SDA_BASE_", NULL
);
1923 if (sdasym
!= NULL
&& sdasym
->is_undefined())
1925 Output_data_space
* sdata
= new Output_data_space(4, "** sdata");
1927 = layout
->add_output_section_data(".sdata", 0,
1929 | elfcpp::SHF_WRITE
,
1930 sdata
, ORDER_SMALL_DATA
, false);
1931 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1932 Symbol_table::PREDEFINED
,
1933 os
, 32768, 0, elfcpp::STT_OBJECT
,
1934 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
1940 // Set up PowerPC target specific relobj.
1942 template<int size
, bool big_endian
>
1944 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1945 const std::string
& name
,
1946 Input_file
* input_file
,
1947 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1949 int et
= ehdr
.get_e_type();
1950 // ET_EXEC files are valid input for --just-symbols/-R,
1951 // and we treat them as relocatable objects.
1952 if (et
== elfcpp::ET_REL
1953 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1955 Powerpc_relobj
<size
, big_endian
>* obj
=
1956 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1960 else if (et
== elfcpp::ET_DYN
)
1962 Powerpc_dynobj
<size
, big_endian
>* obj
=
1963 new Powerpc_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1969 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1974 template<int size
, bool big_endian
>
1975 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1978 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1979 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1981 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1982 : Output_data_got
<size
, big_endian
>(),
1983 symtab_(symtab
), layout_(layout
),
1984 header_ent_cnt_(size
== 32 ? 3 : 1),
1985 header_index_(size
== 32 ? 0x2000 : 0)
1990 // Create a new GOT entry and return its offset.
1992 add_got_entry(Got_entry got_entry
)
1994 this->reserve_ent();
1995 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1998 // Create a pair of new GOT entries and return the offset of the first.
2000 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
2002 this->reserve_ent(2);
2003 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
2008 add_constant_pair(Valtype c1
, Valtype c2
)
2010 this->reserve_ent(2);
2011 unsigned int got_offset
= this->add_constant(c1
);
2012 this->add_constant(c2
);
2016 // Offset of _GLOBAL_OFFSET_TABLE_.
2020 return this->got_offset(this->header_index_
);
2023 // Offset of base used to access the GOT/TOC.
2024 // The got/toc pointer reg will be set to this value.
2026 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
2029 return this->g_o_t();
2031 return (this->output_section()->address()
2032 + object
->toc_base_offset()
2036 // Ensure our GOT has a header.
2038 set_final_data_size()
2040 if (this->header_ent_cnt_
!= 0)
2041 this->make_header();
2042 Output_data_got
<size
, big_endian
>::set_final_data_size();
2045 // First word of GOT header needs some values that are not
2046 // handled by Output_data_got so poke them in here.
2047 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2049 do_write(Output_file
* of
)
2052 if (size
== 32 && this->layout_
->dynamic_data() != NULL
)
2053 val
= this->layout_
->dynamic_section()->address();
2055 val
= this->output_section()->address() + 0x8000;
2056 this->replace_constant(this->header_index_
, val
);
2057 Output_data_got
<size
, big_endian
>::do_write(of
);
2062 reserve_ent(unsigned int cnt
= 1)
2064 if (this->header_ent_cnt_
== 0)
2066 if (this->num_entries() + cnt
> this->header_index_
)
2067 this->make_header();
2073 this->header_ent_cnt_
= 0;
2074 this->header_index_
= this->num_entries();
2077 Output_data_got
<size
, big_endian
>::add_constant(0);
2078 Output_data_got
<size
, big_endian
>::add_constant(0);
2079 Output_data_got
<size
, big_endian
>::add_constant(0);
2081 // Define _GLOBAL_OFFSET_TABLE_ at the header
2082 Symbol
*gotsym
= this->symtab_
->lookup("_GLOBAL_OFFSET_TABLE_", NULL
);
2085 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(gotsym
);
2086 sym
->set_value(this->g_o_t());
2089 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2090 Symbol_table::PREDEFINED
,
2091 this, this->g_o_t(), 0,
2094 elfcpp::STV_HIDDEN
, 0,
2098 Output_data_got
<size
, big_endian
>::add_constant(0);
2101 // Stashed pointers.
2102 Symbol_table
* symtab_
;
2106 unsigned int header_ent_cnt_
;
2107 // GOT header index.
2108 unsigned int header_index_
;
2111 // Get the GOT section, creating it if necessary.
2113 template<int size
, bool big_endian
>
2114 Output_data_got_powerpc
<size
, big_endian
>*
2115 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2118 if (this->got_
== NULL
)
2120 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2123 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
2125 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2126 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2127 this->got_
, ORDER_DATA
, false);
2133 // Get the dynamic reloc section, creating it if necessary.
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(Layout
* layout
)
2139 if (this->rela_dyn_
== NULL
)
2141 gold_assert(layout
!= NULL
);
2142 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2143 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2144 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2145 ORDER_DYNAMIC_RELOCS
, false);
2147 return this->rela_dyn_
;
2150 // Similarly, but for ifunc symbols get the one for ifunc.
2152 template<int size
, bool big_endian
>
2153 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
2154 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Symbol_table
* symtab
,
2159 return this->rela_dyn_section(layout
);
2161 if (this->iplt_
== NULL
)
2162 this->make_iplt_section(symtab
, layout
);
2163 return this->iplt_
->rel_plt();
2169 // Determine the stub group size. The group size is the absolute
2170 // value of the parameter --stub-group-size. If --stub-group-size
2171 // is passed a negative value, we restrict stubs to be always before
2172 // the stubbed branches.
2173 Stub_control(int32_t size
)
2174 : state_(NO_GROUP
), stub_group_size_(abs(size
)),
2175 stub14_group_size_(abs(size
)),
2176 stubs_always_before_branch_(size
< 0), suppress_size_errors_(false),
2177 group_end_addr_(0), owner_(NULL
), output_section_(NULL
)
2179 if (stub_group_size_
== 1)
2182 if (stubs_always_before_branch_
)
2184 stub_group_size_
= 0x1e00000;
2185 stub14_group_size_
= 0x7800;
2189 stub_group_size_
= 0x1c00000;
2190 stub14_group_size_
= 0x7000;
2192 suppress_size_errors_
= true;
2196 // Return true iff input section can be handled by current stub
2199 can_add_to_stub_group(Output_section
* o
,
2200 const Output_section::Input_section
* i
,
2203 const Output_section::Input_section
*
2209 { return output_section_
; }
2215 FINDING_STUB_SECTION
,
2220 uint32_t stub_group_size_
;
2221 uint32_t stub14_group_size_
;
2222 bool stubs_always_before_branch_
;
2223 bool suppress_size_errors_
;
2224 uint64_t group_end_addr_
;
2225 const Output_section::Input_section
* owner_
;
2226 Output_section
* output_section_
;
2229 // Return true iff input section can be handled by current stub
2233 Stub_control::can_add_to_stub_group(Output_section
* o
,
2234 const Output_section::Input_section
* i
,
2238 = has14
? this->stub14_group_size_
: this->stub_group_size_
;
2239 bool whole_sec
= o
->order() == ORDER_INIT
|| o
->order() == ORDER_FINI
;
2241 uint64_t start_addr
= o
->address();
2244 // .init and .fini sections are pasted together to form a single
2245 // function. We can't be adding stubs in the middle of the function.
2246 this_size
= o
->data_size();
2249 start_addr
+= i
->relobj()->output_section_offset(i
->shndx());
2250 this_size
= i
->data_size();
2252 uint64_t end_addr
= start_addr
+ this_size
;
2253 bool toobig
= this_size
> group_size
;
2255 if (toobig
&& !this->suppress_size_errors_
)
2256 gold_warning(_("%s:%s exceeds group size"),
2257 i
->relobj()->name().c_str(),
2258 i
->relobj()->section_name(i
->shndx()).c_str());
2260 if (this->state_
!= HAS_STUB_SECTION
2261 && (!whole_sec
|| this->output_section_
!= o
)
2262 && (this->state_
== NO_GROUP
2263 || this->group_end_addr_
- end_addr
< group_size
))
2266 this->output_section_
= o
;
2269 if (this->state_
== NO_GROUP
)
2271 this->state_
= FINDING_STUB_SECTION
;
2272 this->group_end_addr_
= end_addr
;
2274 else if (this->group_end_addr_
- start_addr
< group_size
)
2276 // Adding this section would make the group larger than GROUP_SIZE.
2277 else if (this->state_
== FINDING_STUB_SECTION
2278 && !this->stubs_always_before_branch_
2281 // But wait, there's more! Input sections up to GROUP_SIZE
2282 // bytes before the stub table can be handled by it too.
2283 this->state_
= HAS_STUB_SECTION
;
2284 this->group_end_addr_
= end_addr
;
2288 this->state_
= NO_GROUP
;
2294 // Look over all the input sections, deciding where to place stubs.
2296 template<int size
, bool big_endian
>
2298 Target_powerpc
<size
, big_endian
>::group_sections(Layout
* layout
,
2301 Stub_control
stub_control(parameters
->options().stub_group_size());
2303 // Group input sections and insert stub table
2304 Stub_table
<size
, big_endian
>* stub_table
= NULL
;
2305 Layout::Section_list section_list
;
2306 layout
->get_executable_sections(§ion_list
);
2307 std::stable_sort(section_list
.begin(), section_list
.end(), Sort_sections());
2308 for (Layout::Section_list::reverse_iterator o
= section_list
.rbegin();
2309 o
!= section_list
.rend();
2312 typedef Output_section::Input_section_list Input_section_list
;
2313 for (Input_section_list::const_reverse_iterator i
2314 = (*o
)->input_sections().rbegin();
2315 i
!= (*o
)->input_sections().rend();
2318 if (i
->is_input_section())
2320 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2321 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2322 bool has14
= ppcobj
->has_14bit_branch(i
->shndx());
2323 if (!stub_control
.can_add_to_stub_group(*o
, &*i
, has14
))
2325 stub_table
->init(stub_control
.owner(),
2326 stub_control
.output_section());
2329 if (stub_table
== NULL
)
2330 stub_table
= this->new_stub_table();
2331 ppcobj
->set_stub_table(i
->shndx(), stub_table
);
2335 if (stub_table
!= NULL
)
2337 const Output_section::Input_section
* i
= stub_control
.owner();
2338 if (!i
->is_input_section())
2340 // Corner case. A new stub group was made for the first
2341 // section (last one looked at here) for some reason, but
2342 // the first section is already being used as the owner for
2343 // a stub table for following sections. Force it into that
2345 gold_assert(this->stub_tables_
.size() >= 2);
2346 this->stub_tables_
.pop_back();
2348 Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
2349 <Powerpc_relobj
<size
, big_endian
>*>(i
->relobj());
2350 ppcobj
->set_stub_table(i
->shndx(), this->stub_tables_
.back());
2353 stub_table
->init(i
, stub_control
.output_section());
2357 // If this branch needs a plt call stub, or a long branch stub, make one.
2359 template<int size
, bool big_endian
>
2361 Target_powerpc
<size
, big_endian
>::Branch_info::make_stub(
2362 Stub_table
<size
, big_endian
>* stub_table
,
2363 Stub_table
<size
, big_endian
>* ifunc_stub_table
,
2364 Symbol_table
* symtab
) const
2366 Symbol
* sym
= this->object_
->global_symbol(this->r_sym_
);
2367 if (sym
!= NULL
&& sym
->is_forwarder())
2368 sym
= symtab
->resolve_forwards(sym
);
2369 const Sized_symbol
<size
>* gsym
= static_cast<const Sized_symbol
<size
>*>(sym
);
2371 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(this->r_type_
))
2372 : this->object_
->local_has_plt_offset(this->r_sym_
))
2374 if (stub_table
== NULL
)
2375 stub_table
= this->object_
->stub_table(this->shndx_
);
2376 if (stub_table
== NULL
)
2378 // This is a ref from a data section to an ifunc symbol.
2379 stub_table
= ifunc_stub_table
;
2381 gold_assert(stub_table
!= NULL
);
2383 stub_table
->add_plt_call_entry(this->object_
, gsym
,
2384 this->r_type_
, this->addend_
);
2386 stub_table
->add_plt_call_entry(this->object_
, this->r_sym_
,
2387 this->r_type_
, this->addend_
);
2391 unsigned int max_branch_offset
;
2392 if (this->r_type_
== elfcpp::R_POWERPC_REL14
2393 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRTAKEN
2394 || this->r_type_
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
2395 max_branch_offset
= 1 << 15;
2396 else if (this->r_type_
== elfcpp::R_POWERPC_REL24
2397 || this->r_type_
== elfcpp::R_PPC_PLTREL24
2398 || this->r_type_
== elfcpp::R_PPC_LOCAL24PC
)
2399 max_branch_offset
= 1 << 25;
2402 Address from
= this->object_
->get_output_section_offset(this->shndx_
);
2403 gold_assert(from
!= invalid_address
);
2404 from
+= (this->object_
->output_section(this->shndx_
)->address()
2409 switch (gsym
->source())
2411 case Symbol::FROM_OBJECT
:
2413 Object
* symobj
= gsym
->object();
2414 if (symobj
->is_dynamic()
2415 || symobj
->pluginobj() != NULL
)
2418 unsigned int shndx
= gsym
->shndx(&is_ordinary
);
2419 if (shndx
== elfcpp::SHN_UNDEF
)
2424 case Symbol::IS_UNDEFINED
:
2430 Symbol_table::Compute_final_value_status status
;
2431 to
= symtab
->compute_final_value
<size
>(gsym
, &status
);
2432 if (status
!= Symbol_table::CFVS_OK
)
2437 const Symbol_value
<size
>* psymval
2438 = this->object_
->local_symbol(this->r_sym_
);
2439 Symbol_value
<size
> symval
;
2440 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2441 typename
ObjType::Compute_final_local_value_status status
2442 = this->object_
->compute_final_local_value(this->r_sym_
, psymval
,
2444 if (status
!= ObjType::CFLV_OK
2445 || !symval
.has_output_value())
2447 to
= symval
.value(this->object_
, 0);
2449 to
+= this->addend_
;
2450 if (stub_table
== NULL
)
2451 stub_table
= this->object_
->stub_table(this->shndx_
);
2452 if (size
== 64 && is_branch_reloc(this->r_type_
))
2454 unsigned int dest_shndx
;
2455 Target_powerpc
<size
, big_endian
>* target
=
2456 static_cast<Target_powerpc
<size
, big_endian
>*>(
2457 parameters
->sized_target
<size
, big_endian
>());
2458 to
= target
->symval_for_branch(symtab
, to
, gsym
,
2459 this->object_
, &dest_shndx
);
2461 Address delta
= to
- from
;
2462 if (delta
+ max_branch_offset
>= 2 * max_branch_offset
)
2464 if (stub_table
== NULL
)
2466 gold_warning(_("%s:%s: branch in non-executable section,"
2467 " no long branch stub for you"),
2468 this->object_
->name().c_str(),
2469 this->object_
->section_name(this->shndx_
).c_str());
2472 stub_table
->add_long_branch_entry(this->object_
, to
);
2477 // Relaxation hook. This is where we do stub generation.
2479 template<int size
, bool big_endian
>
2481 Target_powerpc
<size
, big_endian
>::do_relax(int pass
,
2482 const Input_objects
*,
2483 Symbol_table
* symtab
,
2487 unsigned int prev_brlt_size
= 0;
2490 bool thread_safe
= parameters
->options().plt_thread_safe();
2491 if (size
== 64 && !parameters
->options().user_set_plt_thread_safe())
2493 static const char* const thread_starter
[] =
2497 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2499 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2500 "mq_notify", "create_timer",
2504 "GOMP_parallel_start",
2505 "GOMP_parallel_loop_static_start",
2506 "GOMP_parallel_loop_dynamic_start",
2507 "GOMP_parallel_loop_guided_start",
2508 "GOMP_parallel_loop_runtime_start",
2509 "GOMP_parallel_sections_start",
2512 if (parameters
->options().shared())
2516 for (unsigned int i
= 0;
2517 i
< sizeof(thread_starter
) / sizeof(thread_starter
[0]);
2520 Symbol
* sym
= symtab
->lookup(thread_starter
[i
], NULL
);
2521 thread_safe
= (sym
!= NULL
2523 && sym
->in_real_elf());
2529 this->plt_thread_safe_
= thread_safe
;
2530 this->group_sections(layout
, task
);
2533 // We need address of stub tables valid for make_stub.
2534 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2535 p
!= this->stub_tables_
.end();
2538 const Powerpc_relobj
<size
, big_endian
>* object
2539 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>((*p
)->relobj());
2540 Address off
= object
->get_output_section_offset((*p
)->shndx());
2541 gold_assert(off
!= invalid_address
);
2542 Output_section
* os
= (*p
)->output_section();
2543 (*p
)->set_address_and_size(os
, off
);
2548 // Clear plt call stubs, long branch stubs and branch lookup table.
2549 prev_brlt_size
= this->branch_lookup_table_
.size();
2550 this->branch_lookup_table_
.clear();
2551 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2552 p
!= this->stub_tables_
.end();
2555 (*p
)->clear_stubs();
2559 // Build all the stubs.
2560 Stub_table
<size
, big_endian
>* ifunc_stub_table
2561 = this->stub_tables_
.size() == 0 ? NULL
: this->stub_tables_
[0];
2562 Stub_table
<size
, big_endian
>* one_stub_table
2563 = this->stub_tables_
.size() != 1 ? NULL
: ifunc_stub_table
;
2564 for (typename
Branches::const_iterator b
= this->branch_info_
.begin();
2565 b
!= this->branch_info_
.end();
2568 b
->make_stub(one_stub_table
, ifunc_stub_table
, symtab
);
2571 // Did anything change size?
2572 unsigned int num_huge_branches
= this->branch_lookup_table_
.size();
2573 bool again
= num_huge_branches
!= prev_brlt_size
;
2574 if (size
== 64 && num_huge_branches
!= 0)
2575 this->make_brlt_section(layout
);
2576 if (size
== 64 && again
)
2577 this->brlt_section_
->set_current_size(num_huge_branches
);
2579 typedef Unordered_set
<Output_section
*> Output_sections
;
2580 Output_sections os_need_update
;
2581 for (typename
Stub_tables::iterator p
= this->stub_tables_
.begin();
2582 p
!= this->stub_tables_
.end();
2585 if ((*p
)->size_update())
2588 (*p
)->add_eh_frame(layout
);
2589 os_need_update
.insert((*p
)->output_section());
2593 // Set output section offsets for all input sections in an output
2594 // section that just changed size. Anything past the stubs will
2596 for (typename
Output_sections::iterator p
= os_need_update
.begin();
2597 p
!= os_need_update
.end();
2600 Output_section
* os
= *p
;
2602 typedef Output_section::Input_section_list Input_section_list
;
2603 for (Input_section_list::const_iterator i
= os
->input_sections().begin();
2604 i
!= os
->input_sections().end();
2607 off
= align_address(off
, i
->addralign());
2608 if (i
->is_input_section() || i
->is_relaxed_input_section())
2609 i
->relobj()->set_section_offset(i
->shndx(), off
);
2610 if (i
->is_relaxed_input_section())
2612 Stub_table
<size
, big_endian
>* stub_table
2613 = static_cast<Stub_table
<size
, big_endian
>*>(
2614 i
->relaxed_input_section());
2615 off
+= stub_table
->set_address_and_size(os
, off
);
2618 off
+= i
->data_size();
2620 // If .branch_lt is part of this output section, then we have
2621 // just done the offset adjustment.
2622 os
->clear_section_offsets_need_adjustment();
2627 && num_huge_branches
!= 0
2628 && parameters
->options().output_is_position_independent())
2630 // Fill in the BRLT relocs.
2631 this->brlt_section_
->reset_data_size();
2632 for (typename
Branch_lookup_table::const_iterator p
2633 = this->branch_lookup_table_
.begin();
2634 p
!= this->branch_lookup_table_
.end();
2637 this->brlt_section_
->add_reloc(p
->first
, p
->second
);
2639 this->brlt_section_
->finalize_data_size();
2644 template<int size
, bool big_endian
>
2646 Target_powerpc
<size
, big_endian
>::do_plt_fde_location(const Output_data
* plt
,
2647 unsigned char* oview
,
2651 uint64_t address
= plt
->address();
2652 off_t len
= plt
->data_size();
2654 if (plt
== this->glink_
)
2656 // See Output_data_glink::do_write() for glink contents.
2659 // There is one word before __glink_PLTresolve
2663 else if (parameters
->options().output_is_position_independent())
2665 // There are two FDEs for a position independent glink.
2666 // The first covers the branch table, the second
2667 // __glink_PLTresolve at the end of glink.
2668 off_t resolve_size
= this->glink_
->pltresolve_size
;
2670 len
-= resolve_size
;
2673 address
+= len
- resolve_size
;
2680 // Must be a stub table.
2681 const Stub_table
<size
, big_endian
>* stub_table
2682 = static_cast<const Stub_table
<size
, big_endian
>*>(plt
);
2683 uint64_t stub_address
= stub_table
->stub_address();
2684 len
-= stub_address
- address
;
2685 address
= stub_address
;
2688 *paddress
= address
;
2692 // A class to handle the PLT data.
2694 template<int size
, bool big_endian
>
2695 class Output_data_plt_powerpc
: public Output_section_data_build
2698 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
2699 size
, big_endian
> Reloc_section
;
2701 Output_data_plt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
2702 Reloc_section
* plt_rel
,
2703 unsigned int reserved_size
,
2705 : Output_section_data_build(size
== 32 ? 4 : 8),
2708 initial_plt_entry_size_(reserved_size
),
2712 // Add an entry to the PLT.
2717 add_ifunc_entry(Symbol
*);
2720 add_local_ifunc_entry(Sized_relobj_file
<size
, big_endian
>*, unsigned int);
2722 // Return the .rela.plt section data.
2729 // Return the number of PLT entries.
2733 if (this->current_data_size() == 0)
2735 return ((this->current_data_size() - this->initial_plt_entry_size_
)
2739 // Return the offset of the first non-reserved PLT entry.
2741 first_plt_entry_offset()
2742 { return this->initial_plt_entry_size_
; }
2744 // Return the size of a PLT entry.
2746 get_plt_entry_size()
2747 { return plt_entry_size
; }
2751 do_adjust_output_section(Output_section
* os
)
2756 // Write to a map file.
2758 do_print_to_mapfile(Mapfile
* mapfile
) const
2759 { mapfile
->print_output_data(this, this->name_
); }
2762 // The size of an entry in the PLT.
2763 static const int plt_entry_size
= size
== 32 ? 4 : 24;
2765 // Write out the PLT data.
2767 do_write(Output_file
*);
2769 // The reloc section.
2770 Reloc_section
* rel_
;
2771 // Allows access to .glink for do_write.
2772 Target_powerpc
<size
, big_endian
>* targ_
;
2773 // The size of the first reserved entry.
2774 int initial_plt_entry_size_
;
2775 // What to report in map file.
2779 // Add an entry to the PLT.
2781 template<int size
, bool big_endian
>
2783 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
2785 if (!gsym
->has_plt_offset())
2787 section_size_type off
= this->current_data_size();
2789 off
+= this->first_plt_entry_offset();
2790 gsym
->set_plt_offset(off
);
2791 gsym
->set_needs_dynsym_entry();
2792 unsigned int dynrel
= elfcpp::R_POWERPC_JMP_SLOT
;
2793 this->rel_
->add_global(gsym
, dynrel
, this, off
, 0);
2794 off
+= plt_entry_size
;
2795 this->set_current_data_size(off
);
2799 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2801 template<int size
, bool big_endian
>
2803 Output_data_plt_powerpc
<size
, big_endian
>::add_ifunc_entry(Symbol
* gsym
)
2805 if (!gsym
->has_plt_offset())
2807 section_size_type off
= this->current_data_size();
2808 gsym
->set_plt_offset(off
);
2809 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2811 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2812 this->rel_
->add_symbolless_global_addend(gsym
, dynrel
, this, off
, 0);
2813 off
+= plt_entry_size
;
2814 this->set_current_data_size(off
);
2818 // Add an entry for a local ifunc symbol to the IPLT.
2820 template<int size
, bool big_endian
>
2822 Output_data_plt_powerpc
<size
, big_endian
>::add_local_ifunc_entry(
2823 Sized_relobj_file
<size
, big_endian
>* relobj
,
2824 unsigned int local_sym_index
)
2826 if (!relobj
->local_has_plt_offset(local_sym_index
))
2828 section_size_type off
= this->current_data_size();
2829 relobj
->set_local_plt_offset(local_sym_index
, off
);
2830 unsigned int dynrel
= elfcpp::R_POWERPC_IRELATIVE
;
2832 dynrel
= elfcpp::R_PPC64_JMP_IREL
;
2833 this->rel_
->add_symbolless_local_addend(relobj
, local_sym_index
, dynrel
,
2835 off
+= plt_entry_size
;
2836 this->set_current_data_size(off
);
2840 static const uint32_t add_0_11_11
= 0x7c0b5a14;
2841 static const uint32_t add_2_2_11
= 0x7c425a14;
2842 static const uint32_t add_3_3_2
= 0x7c631214;
2843 static const uint32_t add_3_3_13
= 0x7c636a14;
2844 static const uint32_t add_11_0_11
= 0x7d605a14;
2845 static const uint32_t add_12_2_11
= 0x7d825a14;
2846 static const uint32_t add_12_12_11
= 0x7d8c5a14;
2847 static const uint32_t addi_11_11
= 0x396b0000;
2848 static const uint32_t addi_12_12
= 0x398c0000;
2849 static const uint32_t addi_2_2
= 0x38420000;
2850 static const uint32_t addi_3_2
= 0x38620000;
2851 static const uint32_t addi_3_3
= 0x38630000;
2852 static const uint32_t addis_0_2
= 0x3c020000;
2853 static const uint32_t addis_0_13
= 0x3c0d0000;
2854 static const uint32_t addis_11_11
= 0x3d6b0000;
2855 static const uint32_t addis_11_30
= 0x3d7e0000;
2856 static const uint32_t addis_12_12
= 0x3d8c0000;
2857 static const uint32_t addis_12_2
= 0x3d820000;
2858 static const uint32_t addis_3_2
= 0x3c620000;
2859 static const uint32_t addis_3_13
= 0x3c6d0000;
2860 static const uint32_t b
= 0x48000000;
2861 static const uint32_t bcl_20_31
= 0x429f0005;
2862 static const uint32_t bctr
= 0x4e800420;
2863 static const uint32_t blr
= 0x4e800020;
2864 static const uint32_t blrl
= 0x4e800021;
2865 static const uint32_t bnectr_p4
= 0x4ce20420;
2866 static const uint32_t cmpldi_2_0
= 0x28220000;
2867 static const uint32_t cror_15_15_15
= 0x4def7b82;
2868 static const uint32_t cror_31_31_31
= 0x4ffffb82;
2869 static const uint32_t ld_0_1
= 0xe8010000;
2870 static const uint32_t ld_0_12
= 0xe80c0000;
2871 static const uint32_t ld_11_12
= 0xe96c0000;
2872 static const uint32_t ld_11_2
= 0xe9620000;
2873 static const uint32_t ld_2_1
= 0xe8410000;
2874 static const uint32_t ld_2_11
= 0xe84b0000;
2875 static const uint32_t ld_2_12
= 0xe84c0000;
2876 static const uint32_t ld_2_2
= 0xe8420000;
2877 static const uint32_t lfd_0_1
= 0xc8010000;
2878 static const uint32_t li_0_0
= 0x38000000;
2879 static const uint32_t li_12_0
= 0x39800000;
2880 static const uint32_t lis_0_0
= 0x3c000000;
2881 static const uint32_t lis_11
= 0x3d600000;
2882 static const uint32_t lis_12
= 0x3d800000;
2883 static const uint32_t lwz_0_12
= 0x800c0000;
2884 static const uint32_t lwz_11_11
= 0x816b0000;
2885 static const uint32_t lwz_11_30
= 0x817e0000;
2886 static const uint32_t lwz_12_12
= 0x818c0000;
2887 static const uint32_t lwzu_0_12
= 0x840c0000;
2888 static const uint32_t lvx_0_12_0
= 0x7c0c00ce;
2889 static const uint32_t mflr_0
= 0x7c0802a6;
2890 static const uint32_t mflr_11
= 0x7d6802a6;
2891 static const uint32_t mflr_12
= 0x7d8802a6;
2892 static const uint32_t mtctr_0
= 0x7c0903a6;
2893 static const uint32_t mtctr_11
= 0x7d6903a6;
2894 static const uint32_t mtctr_12
= 0x7d8903a6;
2895 static const uint32_t mtlr_0
= 0x7c0803a6;
2896 static const uint32_t mtlr_12
= 0x7d8803a6;
2897 static const uint32_t nop
= 0x60000000;
2898 static const uint32_t ori_0_0_0
= 0x60000000;
2899 static const uint32_t std_0_1
= 0xf8010000;
2900 static const uint32_t std_0_12
= 0xf80c0000;
2901 static const uint32_t std_2_1
= 0xf8410000;
2902 static const uint32_t stfd_0_1
= 0xd8010000;
2903 static const uint32_t stvx_0_12_0
= 0x7c0c01ce;
2904 static const uint32_t sub_11_11_12
= 0x7d6c5850;
2905 static const uint32_t xor_11_11_11
= 0x7d6b5a78;
2907 // Write out the PLT.
2909 template<int size
, bool big_endian
>
2911 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
2913 if (size
== 32 && this->name_
[3] != 'I')
2915 const section_size_type offset
= this->offset();
2916 const section_size_type oview_size
2917 = convert_to_section_size_type(this->data_size());
2918 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
2919 unsigned char* pov
= oview
;
2920 unsigned char* endpov
= oview
+ oview_size
;
2922 // The address of the .glink branch table
2923 const Output_data_glink
<size
, big_endian
>* glink
2924 = this->targ_
->glink_section();
2925 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
= glink
->address();
2927 while (pov
< endpov
)
2929 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
2934 of
->write_output_view(offset
, oview_size
, oview
);
2938 // Create the PLT section.
2940 template<int size
, bool big_endian
>
2942 Target_powerpc
<size
, big_endian
>::make_plt_section(Symbol_table
* symtab
,
2945 if (this->plt_
== NULL
)
2947 if (this->got_
== NULL
)
2948 this->got_section(symtab
, layout
);
2950 if (this->glink_
== NULL
)
2951 make_glink_section(layout
);
2953 // Ensure that .rela.dyn always appears before .rela.plt This is
2954 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2955 // needs to include .rela.plt in its range.
2956 this->rela_dyn_section(layout
);
2958 Reloc_section
* plt_rel
= new Reloc_section(false);
2959 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
2960 elfcpp::SHF_ALLOC
, plt_rel
,
2961 ORDER_DYNAMIC_PLT_RELOCS
, false);
2963 = new Output_data_plt_powerpc
<size
, big_endian
>(this, plt_rel
,
2964 size
== 32 ? 0 : 24,
2966 layout
->add_output_section_data(".plt",
2968 ? elfcpp::SHT_PROGBITS
2969 : elfcpp::SHT_NOBITS
),
2970 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
2979 // Create the IPLT section.
2981 template<int size
, bool big_endian
>
2983 Target_powerpc
<size
, big_endian
>::make_iplt_section(Symbol_table
* symtab
,
2986 if (this->iplt_
== NULL
)
2988 this->make_plt_section(symtab
, layout
);
2990 Reloc_section
* iplt_rel
= new Reloc_section(false);
2991 this->rela_dyn_
->output_section()->add_output_section_data(iplt_rel
);
2993 = new Output_data_plt_powerpc
<size
, big_endian
>(this, iplt_rel
,
2995 this->plt_
->output_section()->add_output_section_data(this->iplt_
);
2999 // A section for huge long branch addresses, similar to plt section.
3001 template<int size
, bool big_endian
>
3002 class Output_data_brlt_powerpc
: public Output_section_data_build
3005 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3006 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
3007 size
, big_endian
> Reloc_section
;
3009 Output_data_brlt_powerpc(Target_powerpc
<size
, big_endian
>* targ
,
3010 Reloc_section
* brlt_rel
)
3011 : Output_section_data_build(size
== 32 ? 4 : 8),
3016 // Add a reloc for an entry in the BRLT.
3018 add_reloc(Address to
, unsigned int off
)
3019 { this->rel_
->add_relative(elfcpp::R_POWERPC_RELATIVE
, this, off
, to
); }
3021 // Update section and reloc section size.
3023 set_current_size(unsigned int num_branches
)
3025 this->reset_address_and_file_offset();
3026 this->set_current_data_size(num_branches
* 16);
3027 this->finalize_data_size();
3028 Output_section
* os
= this->output_section();
3029 os
->set_section_offsets_need_adjustment();
3030 if (this->rel_
!= NULL
)
3032 unsigned int reloc_size
3033 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3034 this->rel_
->reset_address_and_file_offset();
3035 this->rel_
->set_current_data_size(num_branches
* reloc_size
);
3036 this->rel_
->finalize_data_size();
3037 Output_section
* os
= this->rel_
->output_section();
3038 os
->set_section_offsets_need_adjustment();
3044 do_adjust_output_section(Output_section
* os
)
3049 // Write to a map file.
3051 do_print_to_mapfile(Mapfile
* mapfile
) const
3052 { mapfile
->print_output_data(this, "** BRLT"); }
3055 // Write out the BRLT data.
3057 do_write(Output_file
*);
3059 // The reloc section.
3060 Reloc_section
* rel_
;
3061 Target_powerpc
<size
, big_endian
>* targ_
;
3064 // Make the branch lookup table section.
3066 template<int size
, bool big_endian
>
3068 Target_powerpc
<size
, big_endian
>::make_brlt_section(Layout
* layout
)
3070 if (size
== 64 && this->brlt_section_
== NULL
)
3072 Reloc_section
* brlt_rel
= NULL
;
3073 bool is_pic
= parameters
->options().output_is_position_independent();
3076 // When PIC we can't fill in .branch_lt (like .plt it can be
3077 // a bss style section) but must initialise at runtime via
3078 // dynamic relocats.
3079 this->rela_dyn_section(layout
);
3080 brlt_rel
= new Reloc_section(false);
3081 this->rela_dyn_
->output_section()->add_output_section_data(brlt_rel
);
3084 = new Output_data_brlt_powerpc
<size
, big_endian
>(this, brlt_rel
);
3085 if (this->plt_
&& is_pic
)
3086 this->plt_
->output_section()
3087 ->add_output_section_data(this->brlt_section_
);
3089 layout
->add_output_section_data(".branch_lt",
3090 (is_pic
? elfcpp::SHT_NOBITS
3091 : elfcpp::SHT_PROGBITS
),
3092 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
3093 this->brlt_section_
,
3094 (is_pic
? ORDER_SMALL_BSS
3095 : ORDER_SMALL_DATA
),
3100 // Write out .branch_lt when non-PIC.
3102 template<int size
, bool big_endian
>
3104 Output_data_brlt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
3106 if (size
== 64 && !parameters
->options().output_is_position_independent())
3108 const section_size_type offset
= this->offset();
3109 const section_size_type oview_size
3110 = convert_to_section_size_type(this->data_size());
3111 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3113 this->targ_
->write_branch_lookup_table(oview
);
3114 of
->write_output_view(offset
, oview_size
, oview
);
3118 static inline uint32_t
3124 static inline uint32_t
3130 static inline uint32_t
3133 return hi(a
+ 0x8000);
3139 static const unsigned char eh_frame_cie
[12];
3143 const unsigned char Eh_cie
<size
>::eh_frame_cie
[] =
3146 'z', 'R', 0, // Augmentation string.
3147 4, // Code alignment.
3148 0x80 - size
/ 8 , // Data alignment.
3150 1, // Augmentation size.
3151 (elfcpp::DW_EH_PE_pcrel
3152 | elfcpp::DW_EH_PE_sdata4
), // FDE encoding.
3153 elfcpp::DW_CFA_def_cfa
, 1, 0 // def_cfa: r1 offset 0.
3156 // Describe __glink_PLTresolve use of LR, 64-bit version.
3157 static const unsigned char glink_eh_frame_fde_64
[] =
3159 0, 0, 0, 0, // Replaced with offset to .glink.
3160 0, 0, 0, 0, // Replaced with size of .glink.
3161 0, // Augmentation size.
3162 elfcpp::DW_CFA_advance_loc
+ 1,
3163 elfcpp::DW_CFA_register
, 65, 12,
3164 elfcpp::DW_CFA_advance_loc
+ 4,
3165 elfcpp::DW_CFA_restore_extended
, 65
3168 // Describe __glink_PLTresolve use of LR, 32-bit version.
3169 static const unsigned char glink_eh_frame_fde_32
[] =
3171 0, 0, 0, 0, // Replaced with offset to .glink.
3172 0, 0, 0, 0, // Replaced with size of .glink.
3173 0, // Augmentation size.
3174 elfcpp::DW_CFA_advance_loc
+ 2,
3175 elfcpp::DW_CFA_register
, 65, 0,
3176 elfcpp::DW_CFA_advance_loc
+ 4,
3177 elfcpp::DW_CFA_restore_extended
, 65
3180 static const unsigned char default_fde
[] =
3182 0, 0, 0, 0, // Replaced with offset to stubs.
3183 0, 0, 0, 0, // Replaced with size of stubs.
3184 0, // Augmentation size.
3185 elfcpp::DW_CFA_nop
, // Pad.
3190 template<bool big_endian
>
3192 write_insn(unsigned char* p
, uint32_t v
)
3194 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
3197 // Stub_table holds information about plt and long branch stubs.
3198 // Stubs are built in an area following some input section determined
3199 // by group_sections(). This input section is converted to a relaxed
3200 // input section allowing it to be resized to accommodate the stubs
3202 template<int size
, bool big_endian
>
3203 class Stub_table
: public Output_relaxed_input_section
3206 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3207 static const Address invalid_address
= static_cast<Address
>(0) - 1;
3209 Stub_table(Target_powerpc
<size
, big_endian
>* targ
)
3210 : Output_relaxed_input_section(NULL
, 0, 0),
3211 targ_(targ
), plt_call_stubs_(), long_branch_stubs_(),
3212 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
3213 branch_size_(0), last_branch_size_(0), eh_frame_added_(false)
3216 // Delayed Output_relaxed_input_section init.
3218 init(const Output_section::Input_section
*, Output_section
*);
3220 // Add a plt call stub.
3222 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3228 add_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3233 // Find a given plt call stub.
3235 find_plt_call_entry(const Symbol
*) const;
3238 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3239 unsigned int) const;
3242 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3248 find_plt_call_entry(const Sized_relobj_file
<size
, big_endian
>*,
3253 // Add a long branch stub.
3255 add_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*, Address
);
3258 find_long_branch_entry(const Powerpc_relobj
<size
, big_endian
>*,
3264 this->plt_call_stubs_
.clear();
3265 this->plt_size_
= 0;
3266 this->long_branch_stubs_
.clear();
3267 this->branch_size_
= 0;
3271 set_address_and_size(const Output_section
* os
, Address off
)
3273 Address start_off
= off
;
3274 off
+= this->orig_data_size_
;
3275 Address my_size
= this->plt_size_
+ this->branch_size_
;
3277 off
= align_address(off
, this->stub_align());
3278 // Include original section size and alignment padding in size
3279 my_size
+= off
- start_off
;
3280 this->reset_address_and_file_offset();
3281 this->set_current_data_size(my_size
);
3282 this->set_address_and_file_offset(os
->address() + start_off
,
3283 os
->offset() + start_off
);
3288 stub_address() const
3290 return align_address(this->address() + this->orig_data_size_
,
3291 this->stub_align());
3297 return align_address(this->offset() + this->orig_data_size_
,
3298 this->stub_align());
3303 { return this->plt_size_
; }
3308 Output_section
* os
= this->output_section();
3309 if (os
->addralign() < this->stub_align())
3311 os
->set_addralign(this->stub_align());
3312 // FIXME: get rid of the insane checkpointing.
3313 // We can't increase alignment of the input section to which
3314 // stubs are attached; The input section may be .init which
3315 // is pasted together with other .init sections to form a
3316 // function. Aligning might insert zero padding resulting in
3317 // sigill. However we do need to increase alignment of the
3318 // output section so that the align_address() on offset in
3319 // set_address_and_size() adds the same padding as the
3320 // align_address() on address in stub_address().
3321 // What's more, we need this alignment for the layout done in
3322 // relaxation_loop_body() so that the output section starts at
3323 // a suitably aligned address.
3324 os
->checkpoint_set_addralign(this->stub_align());
3326 if (this->last_plt_size_
!= this->plt_size_
3327 || this->last_branch_size_
!= this->branch_size_
)
3329 this->last_plt_size_
= this->plt_size_
;
3330 this->last_branch_size_
= this->branch_size_
;
3336 // Add .eh_frame info for this stub section. Unlike other linker
3337 // generated .eh_frame this is added late in the link, because we
3338 // only want the .eh_frame info if this particular stub section is
3341 add_eh_frame(Layout
* layout
)
3343 if (!this->eh_frame_added_
)
3345 if (!parameters
->options().ld_generated_unwind_info())
3348 // Since we add stub .eh_frame info late, it must be placed
3349 // after all other linker generated .eh_frame info so that
3350 // merge mapping need not be updated for input sections.
3351 // There is no provision to use a different CIE to that used
3353 if (!this->targ_
->has_glink())
3356 layout
->add_eh_frame_for_plt(this,
3357 Eh_cie
<size
>::eh_frame_cie
,
3358 sizeof (Eh_cie
<size
>::eh_frame_cie
),
3360 sizeof (default_fde
));
3361 this->eh_frame_added_
= true;
3365 Target_powerpc
<size
, big_endian
>*
3371 class Plt_stub_ent_hash
;
3372 typedef Unordered_map
<Plt_stub_ent
, unsigned int,
3373 Plt_stub_ent_hash
> Plt_stub_entries
;
3375 // Alignment of stub section.
3381 unsigned int min_align
= 32;
3382 unsigned int user_align
= 1 << parameters
->options().plt_align();
3383 return std::max(user_align
, min_align
);
3386 // Return the plt offset for the given call stub.
3388 plt_off(typename
Plt_stub_entries::const_iterator p
, bool* is_iplt
) const
3390 const Symbol
* gsym
= p
->first
.sym_
;
3393 *is_iplt
= (gsym
->type() == elfcpp::STT_GNU_IFUNC
3394 && gsym
->can_use_relative_reloc(false));
3395 return gsym
->plt_offset();
3400 const Sized_relobj_file
<size
, big_endian
>* relobj
= p
->first
.object_
;
3401 unsigned int local_sym_index
= p
->first
.locsym_
;
3402 return relobj
->local_plt_offset(local_sym_index
);
3406 // Size of a given plt call stub.
3408 plt_call_size(typename
Plt_stub_entries::const_iterator p
) const
3414 Address plt_addr
= this->plt_off(p
, &is_iplt
);
3416 plt_addr
+= this->targ_
->iplt_section()->address();
3418 plt_addr
+= this->targ_
->plt_section()->address();
3419 Address got_addr
= this->targ_
->got_section()->output_section()->address();
3420 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3421 <const Powerpc_relobj
<size
, big_endian
>*>(p
->first
.object_
);
3422 got_addr
+= ppcobj
->toc_base_offset();
3423 Address off
= plt_addr
- got_addr
;
3424 bool static_chain
= parameters
->options().plt_static_chain();
3425 bool thread_safe
= this->targ_
->plt_thread_safe();
3426 unsigned int bytes
= (4 * 5
3429 + 4 * (ha(off
) != 0)
3430 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
)));
3431 unsigned int align
= 1 << parameters
->options().plt_align();
3433 bytes
= (bytes
+ align
- 1) & -align
;
3437 // Return long branch stub size.
3439 branch_stub_size(Address to
)
3442 = this->stub_address() + this->last_plt_size_
+ this->branch_size_
;
3443 if (to
- loc
+ (1 << 25) < 2 << 25)
3445 if (size
== 64 || !parameters
->options().output_is_position_independent())
3452 do_write(Output_file
*);
3454 // Plt call stub keys.
3458 Plt_stub_ent(const Symbol
* sym
)
3459 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3462 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3463 unsigned int locsym_index
)
3464 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3467 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3469 unsigned int r_type
,
3471 : sym_(sym
), object_(0), addend_(0), locsym_(0)
3474 this->addend_
= addend
;
3475 else if (parameters
->options().output_is_position_independent()
3476 && r_type
== elfcpp::R_PPC_PLTREL24
)
3478 this->addend_
= addend
;
3479 if (this->addend_
>= 32768)
3480 this->object_
= object
;
3484 Plt_stub_ent(const Sized_relobj_file
<size
, big_endian
>* object
,
3485 unsigned int locsym_index
,
3486 unsigned int r_type
,
3488 : sym_(NULL
), object_(object
), addend_(0), locsym_(locsym_index
)
3491 this->addend_
= addend
;
3492 else if (parameters
->options().output_is_position_independent()
3493 && r_type
== elfcpp::R_PPC_PLTREL24
)
3494 this->addend_
= addend
;
3497 bool operator==(const Plt_stub_ent
& that
) const
3499 return (this->sym_
== that
.sym_
3500 && this->object_
== that
.object_
3501 && this->addend_
== that
.addend_
3502 && this->locsym_
== that
.locsym_
);
3506 const Sized_relobj_file
<size
, big_endian
>* object_
;
3507 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend_
;
3508 unsigned int locsym_
;
3511 class Plt_stub_ent_hash
3514 size_t operator()(const Plt_stub_ent
& ent
) const
3516 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
3517 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
3523 // Long branch stub keys.
3524 class Branch_stub_ent
3527 Branch_stub_ent(const Powerpc_relobj
<size
, big_endian
>* obj
, Address to
)
3528 : dest_(to
), toc_base_off_(0)
3531 toc_base_off_
= obj
->toc_base_offset();
3534 bool operator==(const Branch_stub_ent
& that
) const
3536 return (this->dest_
== that
.dest_
3538 || this->toc_base_off_
== that
.toc_base_off_
));
3542 unsigned int toc_base_off_
;
3545 class Branch_stub_ent_hash
3548 size_t operator()(const Branch_stub_ent
& ent
) const
3549 { return ent
.dest_
^ ent
.toc_base_off_
; }
3552 // In a sane world this would be a global.
3553 Target_powerpc
<size
, big_endian
>* targ_
;
3554 // Map sym/object/addend to stub offset.
3555 Plt_stub_entries plt_call_stubs_
;
3556 // Map destination address to stub offset.
3557 typedef Unordered_map
<Branch_stub_ent
, unsigned int,
3558 Branch_stub_ent_hash
> Branch_stub_entries
;
3559 Branch_stub_entries long_branch_stubs_
;
3560 // size of input section
3561 section_size_type orig_data_size_
;
3563 section_size_type plt_size_
, last_plt_size_
, branch_size_
, last_branch_size_
;
3564 // Whether .eh_frame info has been created for this stub section.
3565 bool eh_frame_added_
;
3568 // Make a new stub table, and record.
3570 template<int size
, bool big_endian
>
3571 Stub_table
<size
, big_endian
>*
3572 Target_powerpc
<size
, big_endian
>::new_stub_table()
3574 Stub_table
<size
, big_endian
>* stub_table
3575 = new Stub_table
<size
, big_endian
>(this);
3576 this->stub_tables_
.push_back(stub_table
);
3580 // Delayed stub table initialisation, because we create the stub table
3581 // before we know to which section it will be attached.
3583 template<int size
, bool big_endian
>
3585 Stub_table
<size
, big_endian
>::init(
3586 const Output_section::Input_section
* owner
,
3587 Output_section
* output_section
)
3589 this->set_relobj(owner
->relobj());
3590 this->set_shndx(owner
->shndx());
3591 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3592 this->set_output_section(output_section
);
3593 this->orig_data_size_
= owner
->current_data_size();
3595 std::vector
<Output_relaxed_input_section
*> new_relaxed
;
3596 new_relaxed
.push_back(this);
3597 output_section
->convert_input_sections_to_relaxed_sections(new_relaxed
);
3600 // Add a plt call stub, if we do not already have one for this
3601 // sym/object/addend combo.
3603 template<int size
, bool big_endian
>
3605 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3606 const Sized_relobj_file
<size
, big_endian
>* object
,
3608 unsigned int r_type
,
3611 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3612 Address off
= this->plt_size_
;
3613 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3614 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3616 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3619 template<int size
, bool big_endian
>
3621 Stub_table
<size
, big_endian
>::add_plt_call_entry(
3622 const Sized_relobj_file
<size
, big_endian
>* object
,
3623 unsigned int locsym_index
,
3624 unsigned int r_type
,
3627 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3628 Address off
= this->plt_size_
;
3629 std::pair
<typename
Plt_stub_entries::iterator
, bool> p
3630 = this->plt_call_stubs_
.insert(std::make_pair(ent
, off
));
3632 this->plt_size_
= off
+ this->plt_call_size(p
.first
);
3635 // Find a plt call stub.
3637 template<int size
, bool big_endian
>
3638 typename Stub_table
<size
, big_endian
>::Address
3639 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3640 const Sized_relobj_file
<size
, big_endian
>* object
,
3642 unsigned int r_type
,
3643 Address addend
) const
3645 Plt_stub_ent
ent(object
, gsym
, r_type
, addend
);
3646 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3647 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3650 template<int size
, bool big_endian
>
3651 typename Stub_table
<size
, big_endian
>::Address
3652 Stub_table
<size
, big_endian
>::find_plt_call_entry(const Symbol
* gsym
) const
3654 Plt_stub_ent
ent(gsym
);
3655 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3656 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3659 template<int size
, bool big_endian
>
3660 typename Stub_table
<size
, big_endian
>::Address
3661 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3662 const Sized_relobj_file
<size
, big_endian
>* object
,
3663 unsigned int locsym_index
,
3664 unsigned int r_type
,
3665 Address addend
) const
3667 Plt_stub_ent
ent(object
, locsym_index
, r_type
, addend
);
3668 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3669 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3672 template<int size
, bool big_endian
>
3673 typename Stub_table
<size
, big_endian
>::Address
3674 Stub_table
<size
, big_endian
>::find_plt_call_entry(
3675 const Sized_relobj_file
<size
, big_endian
>* object
,
3676 unsigned int locsym_index
) const
3678 Plt_stub_ent
ent(object
, locsym_index
);
3679 typename
Plt_stub_entries::const_iterator p
= this->plt_call_stubs_
.find(ent
);
3680 return p
== this->plt_call_stubs_
.end() ? invalid_address
: p
->second
;
3683 // Add a long branch stub if we don't already have one to given
3686 template<int size
, bool big_endian
>
3688 Stub_table
<size
, big_endian
>::add_long_branch_entry(
3689 const Powerpc_relobj
<size
, big_endian
>* object
,
3692 Branch_stub_ent
ent(object
, to
);
3693 Address off
= this->branch_size_
;
3694 if (this->long_branch_stubs_
.insert(std::make_pair(ent
, off
)).second
)
3696 unsigned int stub_size
= this->branch_stub_size(to
);
3697 this->branch_size_
= off
+ stub_size
;
3698 if (size
== 64 && stub_size
!= 4)
3699 this->targ_
->add_branch_lookup_table(to
);
3703 // Find long branch stub.
3705 template<int size
, bool big_endian
>
3706 typename Stub_table
<size
, big_endian
>::Address
3707 Stub_table
<size
, big_endian
>::find_long_branch_entry(
3708 const Powerpc_relobj
<size
, big_endian
>* object
,
3711 Branch_stub_ent
ent(object
, to
);
3712 typename
Branch_stub_entries::const_iterator p
3713 = this->long_branch_stubs_
.find(ent
);
3714 return p
== this->long_branch_stubs_
.end() ? invalid_address
: p
->second
;
3717 // A class to handle .glink.
3719 template<int size
, bool big_endian
>
3720 class Output_data_glink
: public Output_section_data
3723 static const int pltresolve_size
= 16*4;
3725 Output_data_glink(Target_powerpc
<size
, big_endian
>* targ
)
3726 : Output_section_data(16), targ_(targ
)
3730 add_eh_frame(Layout
* layout
)
3732 if (!parameters
->options().ld_generated_unwind_info())
3736 layout
->add_eh_frame_for_plt(this,
3737 Eh_cie
<64>::eh_frame_cie
,
3738 sizeof (Eh_cie
<64>::eh_frame_cie
),
3739 glink_eh_frame_fde_64
,
3740 sizeof (glink_eh_frame_fde_64
));
3743 // 32-bit .glink can use the default since the CIE return
3744 // address reg, LR, is valid.
3745 layout
->add_eh_frame_for_plt(this,
3746 Eh_cie
<32>::eh_frame_cie
,
3747 sizeof (Eh_cie
<32>::eh_frame_cie
),
3749 sizeof (default_fde
));
3750 // Except where LR is used in a PIC __glink_PLTresolve.
3751 if (parameters
->options().output_is_position_independent())
3752 layout
->add_eh_frame_for_plt(this,
3753 Eh_cie
<32>::eh_frame_cie
,
3754 sizeof (Eh_cie
<32>::eh_frame_cie
),
3755 glink_eh_frame_fde_32
,
3756 sizeof (glink_eh_frame_fde_32
));
3761 // Write to a map file.
3763 do_print_to_mapfile(Mapfile
* mapfile
) const
3764 { mapfile
->print_output_data(this, _("** glink")); }
3768 set_final_data_size();
3772 do_write(Output_file
*);
3774 // Allows access to .got and .plt for do_write.
3775 Target_powerpc
<size
, big_endian
>* targ_
;
3778 template<int size
, bool big_endian
>
3780 Output_data_glink
<size
, big_endian
>::set_final_data_size()
3782 unsigned int count
= this->targ_
->plt_entry_count();
3783 section_size_type total
= 0;
3789 // space for branch table
3790 total
+= 4 * (count
- 1);
3792 total
+= -total
& 15;
3793 total
+= this->pltresolve_size
;
3797 total
+= this->pltresolve_size
;
3799 // space for branch table
3802 total
+= 4 * (count
- 0x8000);
3806 this->set_data_size(total
);
3809 // Write out plt and long branch stub code.
3811 template<int size
, bool big_endian
>
3813 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
3815 if (this->plt_call_stubs_
.empty()
3816 && this->long_branch_stubs_
.empty())
3819 const section_size_type start_off
= this->offset();
3820 const section_size_type off
= this->stub_offset();
3821 const section_size_type oview_size
=
3822 convert_to_section_size_type(this->data_size() - (off
- start_off
));
3823 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
3828 const Output_data_got_powerpc
<size
, big_endian
>* got
3829 = this->targ_
->got_section();
3830 Address got_os_addr
= got
->output_section()->address();
3832 if (!this->plt_call_stubs_
.empty())
3834 // The base address of the .plt section.
3835 Address plt_base
= this->targ_
->plt_section()->address();
3836 Address iplt_base
= invalid_address
;
3838 // Write out plt call stubs.
3839 typename
Plt_stub_entries::const_iterator cs
;
3840 for (cs
= this->plt_call_stubs_
.begin();
3841 cs
!= this->plt_call_stubs_
.end();
3845 Address pltoff
= this->plt_off(cs
, &is_iplt
);
3846 Address plt_addr
= pltoff
;
3849 if (iplt_base
== invalid_address
)
3850 iplt_base
= this->targ_
->iplt_section()->address();
3851 plt_addr
+= iplt_base
;
3854 plt_addr
+= plt_base
;
3855 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
3856 <const Powerpc_relobj
<size
, big_endian
>*>(cs
->first
.object_
);
3857 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
3858 Address off
= plt_addr
- got_addr
;
3860 if (off
+ 0x80008000 > 0xffffffff || (off
& 7) != 0)
3861 gold_error(_("%s: linkage table error against `%s'"),
3862 cs
->first
.object_
->name().c_str(),
3863 cs
->first
.sym_
->demangled_name().c_str());
3865 bool static_chain
= parameters
->options().plt_static_chain();
3866 bool thread_safe
= this->targ_
->plt_thread_safe();
3867 bool use_fake_dep
= false;
3868 Address cmp_branch_off
= 0;
3871 unsigned int pltindex
3872 = ((pltoff
- this->targ_
->first_plt_entry_offset())
3873 / this->targ_
->plt_entry_size());
3875 = (this->targ_
->glink_section()->pltresolve_size
3877 if (pltindex
> 32768)
3878 glinkoff
+= (pltindex
- 32768) * 4;
3880 = this->targ_
->glink_section()->address() + glinkoff
;
3882 = (this->stub_address() + cs
->second
+ 24
3883 + 4 * (ha(off
) != 0)
3884 + 4 * (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3885 + 4 * static_chain
);
3886 cmp_branch_off
= to
- from
;
3887 use_fake_dep
= cmp_branch_off
+ (1 << 25) >= (1 << 26);
3890 p
= oview
+ cs
->second
;
3893 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3894 write_insn
<big_endian
>(p
, addis_12_2
+ ha(off
)), p
+= 4;
3895 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
)), p
+= 4;
3896 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3898 write_insn
<big_endian
>(p
, addi_12_12
+ l(off
)), p
+= 4;
3901 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3904 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3905 write_insn
<big_endian
>(p
, add_12_12_11
), p
+= 4;
3907 write_insn
<big_endian
>(p
, ld_2_12
+ l(off
+ 8)), p
+= 4;
3909 write_insn
<big_endian
>(p
, ld_11_12
+ l(off
+ 16)), p
+= 4;
3913 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
3914 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
)), p
+= 4;
3915 if (ha(off
+ 8 + 8 * static_chain
) != ha(off
))
3917 write_insn
<big_endian
>(p
, addi_2_2
+ l(off
)), p
+= 4;
3920 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3923 write_insn
<big_endian
>(p
, xor_11_11_11
), p
+= 4;
3924 write_insn
<big_endian
>(p
, add_2_2_11
), p
+= 4;
3927 write_insn
<big_endian
>(p
, ld_11_2
+ l(off
+ 16)), p
+= 4;
3928 write_insn
<big_endian
>(p
, ld_2_2
+ l(off
+ 8)), p
+= 4;
3930 if (thread_safe
&& !use_fake_dep
)
3932 write_insn
<big_endian
>(p
, cmpldi_2_0
), p
+= 4;
3933 write_insn
<big_endian
>(p
, bnectr_p4
), p
+= 4;
3934 write_insn
<big_endian
>(p
, b
| (cmp_branch_off
& 0x3fffffc));
3937 write_insn
<big_endian
>(p
, bctr
);
3941 // Write out long branch stubs.
3942 typename
Branch_stub_entries::const_iterator bs
;
3943 for (bs
= this->long_branch_stubs_
.begin();
3944 bs
!= this->long_branch_stubs_
.end();
3947 p
= oview
+ this->plt_size_
+ bs
->second
;
3948 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
3949 Address delta
= bs
->first
.dest_
- loc
;
3950 if (delta
+ (1 << 25) < 2 << 25)
3951 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
3955 = this->targ_
->find_branch_lookup_table(bs
->first
.dest_
);
3956 gold_assert(brlt_addr
!= invalid_address
);
3957 brlt_addr
+= this->targ_
->brlt_section()->address();
3958 Address got_addr
= got_os_addr
+ bs
->first
.toc_base_off_
;
3959 Address brltoff
= brlt_addr
- got_addr
;
3960 if (ha(brltoff
) == 0)
3962 write_insn
<big_endian
>(p
, ld_11_2
+ l(brltoff
)), p
+= 4;
3966 write_insn
<big_endian
>(p
, addis_12_2
+ ha(brltoff
)), p
+= 4;
3967 write_insn
<big_endian
>(p
, ld_11_12
+ l(brltoff
)), p
+= 4;
3969 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
3970 write_insn
<big_endian
>(p
, bctr
);
3976 if (!this->plt_call_stubs_
.empty())
3978 // The base address of the .plt section.
3979 Address plt_base
= this->targ_
->plt_section()->address();
3980 Address iplt_base
= invalid_address
;
3981 // The address of _GLOBAL_OFFSET_TABLE_.
3982 Address g_o_t
= invalid_address
;
3984 // Write out plt call stubs.
3985 typename
Plt_stub_entries::const_iterator cs
;
3986 for (cs
= this->plt_call_stubs_
.begin();
3987 cs
!= this->plt_call_stubs_
.end();
3991 Address plt_addr
= this->plt_off(cs
, &is_iplt
);
3994 if (iplt_base
== invalid_address
)
3995 iplt_base
= this->targ_
->iplt_section()->address();
3996 plt_addr
+= iplt_base
;
3999 plt_addr
+= plt_base
;
4001 p
= oview
+ cs
->second
;
4002 if (parameters
->options().output_is_position_independent())
4005 const Powerpc_relobj
<size
, big_endian
>* ppcobj
4006 = (static_cast<const Powerpc_relobj
<size
, big_endian
>*>
4007 (cs
->first
.object_
));
4008 if (ppcobj
!= NULL
&& cs
->first
.addend_
>= 32768)
4010 unsigned int got2
= ppcobj
->got2_shndx();
4011 got_addr
= ppcobj
->get_output_section_offset(got2
);
4012 gold_assert(got_addr
!= invalid_address
);
4013 got_addr
+= (ppcobj
->output_section(got2
)->address()
4014 + cs
->first
.addend_
);
4018 if (g_o_t
== invalid_address
)
4020 const Output_data_got_powerpc
<size
, big_endian
>* got
4021 = this->targ_
->got_section();
4022 g_o_t
= got
->address() + got
->g_o_t();
4027 Address off
= plt_addr
- got_addr
;
4030 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(off
));
4031 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
4032 write_insn
<big_endian
>(p
+ 8, bctr
);
4036 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(off
));
4037 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(off
));
4038 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4039 write_insn
<big_endian
>(p
+ 12, bctr
);
4044 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
4045 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
4046 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
4047 write_insn
<big_endian
>(p
+ 12, bctr
);
4052 // Write out long branch stubs.
4053 typename
Branch_stub_entries::const_iterator bs
;
4054 for (bs
= this->long_branch_stubs_
.begin();
4055 bs
!= this->long_branch_stubs_
.end();
4058 p
= oview
+ this->plt_size_
+ bs
->second
;
4059 Address loc
= this->stub_address() + this->plt_size_
+ bs
->second
;
4060 Address delta
= bs
->first
.dest_
- loc
;
4061 if (delta
+ (1 << 25) < 2 << 25)
4062 write_insn
<big_endian
>(p
, b
| (delta
& 0x3fffffc));
4063 else if (!parameters
->options().output_is_position_independent())
4065 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(bs
->first
.dest_
));
4066 write_insn
<big_endian
>(p
+ 4, addi_12_12
+ l(bs
->first
.dest_
));
4067 write_insn
<big_endian
>(p
+ 8, mtctr_12
);
4068 write_insn
<big_endian
>(p
+ 12, bctr
);
4073 write_insn
<big_endian
>(p
+ 0, mflr_0
);
4074 write_insn
<big_endian
>(p
+ 4, bcl_20_31
);
4075 write_insn
<big_endian
>(p
+ 8, mflr_12
);
4076 write_insn
<big_endian
>(p
+ 12, addis_12_12
+ ha(delta
));
4077 write_insn
<big_endian
>(p
+ 16, addi_12_12
+ l(delta
));
4078 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4079 write_insn
<big_endian
>(p
+ 24, mtctr_12
);
4080 write_insn
<big_endian
>(p
+ 28, bctr
);
4086 // Write out .glink.
4088 template<int size
, bool big_endian
>
4090 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
4092 const section_size_type off
= this->offset();
4093 const section_size_type oview_size
=
4094 convert_to_section_size_type(this->data_size());
4095 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4098 // The base address of the .plt section.
4099 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
4100 Address plt_base
= this->targ_
->plt_section()->address();
4104 // Write pltresolve stub.
4106 Address after_bcl
= this->address() + 16;
4107 Address pltoff
= plt_base
- after_bcl
;
4109 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
4111 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
4112 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
4113 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
4114 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
4115 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
4116 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
4117 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
4118 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
4119 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
4120 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
4121 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
4122 while (p
< oview
+ this->pltresolve_size
)
4123 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4125 // Write lazy link call stubs.
4127 while (p
< oview
+ oview_size
)
4131 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
4135 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
4136 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
4138 uint32_t branch_off
= 8 - (p
- oview
);
4139 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
4145 const Output_data_got_powerpc
<size
, big_endian
>* got
4146 = this->targ_
->got_section();
4147 // The address of _GLOBAL_OFFSET_TABLE_.
4148 Address g_o_t
= got
->address() + got
->g_o_t();
4150 // Write out pltresolve branch table.
4152 unsigned int the_end
= oview_size
- this->pltresolve_size
;
4153 unsigned char* end_p
= oview
+ the_end
;
4154 while (p
< end_p
- 8 * 4)
4155 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
4157 write_insn
<big_endian
>(p
, nop
), p
+= 4;
4159 // Write out pltresolve call stub.
4160 if (parameters
->options().output_is_position_independent())
4162 Address res0_off
= 0;
4163 Address after_bcl_off
= the_end
+ 12;
4164 Address bcl_res0
= after_bcl_off
- res0_off
;
4166 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
4167 write_insn
<big_endian
>(p
+ 4, mflr_0
);
4168 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
4169 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
4170 write_insn
<big_endian
>(p
+ 16, mflr_12
);
4171 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
4172 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
4174 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
4176 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
4177 if (ha(got_bcl
) == ha(got_bcl
+ 4))
4179 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
4180 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
4184 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
4185 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
4187 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
4188 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
4189 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
4190 write_insn
<big_endian
>(p
+ 52, bctr
);
4191 write_insn
<big_endian
>(p
+ 56, nop
);
4192 write_insn
<big_endian
>(p
+ 60, nop
);
4196 Address res0
= this->address();
4198 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
4199 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
4200 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4201 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
4203 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
4204 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
4205 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
4206 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
4207 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
4208 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
4210 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
4211 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
4212 write_insn
<big_endian
>(p
+ 32, bctr
);
4213 write_insn
<big_endian
>(p
+ 36, nop
);
4214 write_insn
<big_endian
>(p
+ 40, nop
);
4215 write_insn
<big_endian
>(p
+ 44, nop
);
4216 write_insn
<big_endian
>(p
+ 48, nop
);
4217 write_insn
<big_endian
>(p
+ 52, nop
);
4218 write_insn
<big_endian
>(p
+ 56, nop
);
4219 write_insn
<big_endian
>(p
+ 60, nop
);
4224 of
->write_output_view(off
, oview_size
, oview
);
4228 // A class to handle linker generated save/restore functions.
4230 template<int size
, bool big_endian
>
4231 class Output_data_save_res
: public Output_section_data_build
4234 Output_data_save_res(Symbol_table
* symtab
);
4237 // Write to a map file.
4239 do_print_to_mapfile(Mapfile
* mapfile
) const
4240 { mapfile
->print_output_data(this, _("** save/restore")); }
4243 do_write(Output_file
*);
4246 // The maximum size of save/restore contents.
4247 static const unsigned int savres_max
= 218*4;
4250 savres_define(Symbol_table
* symtab
,
4252 unsigned int lo
, unsigned int hi
,
4253 unsigned char* write_ent(unsigned char*, int),
4254 unsigned char* write_tail(unsigned char*, int));
4256 unsigned char *contents_
;
4259 template<bool big_endian
>
4260 static unsigned char*
4261 savegpr0(unsigned char* p
, int r
)
4263 uint32_t insn
= std_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4264 write_insn
<big_endian
>(p
, insn
);
4268 template<bool big_endian
>
4269 static unsigned char*
4270 savegpr0_tail(unsigned char* p
, int r
)
4272 p
= savegpr0
<big_endian
>(p
, r
);
4273 uint32_t insn
= std_0_1
+ 16;
4274 write_insn
<big_endian
>(p
, insn
);
4276 write_insn
<big_endian
>(p
, blr
);
4280 template<bool big_endian
>
4281 static unsigned char*
4282 restgpr0(unsigned char* p
, int r
)
4284 uint32_t insn
= ld_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4285 write_insn
<big_endian
>(p
, insn
);
4289 template<bool big_endian
>
4290 static unsigned char*
4291 restgpr0_tail(unsigned char* p
, int r
)
4293 uint32_t insn
= ld_0_1
+ 16;
4294 write_insn
<big_endian
>(p
, insn
);
4296 p
= restgpr0
<big_endian
>(p
, r
);
4297 write_insn
<big_endian
>(p
, mtlr_0
);
4301 p
= restgpr0
<big_endian
>(p
, 30);
4302 p
= restgpr0
<big_endian
>(p
, 31);
4304 write_insn
<big_endian
>(p
, blr
);
4308 template<bool big_endian
>
4309 static unsigned char*
4310 savegpr1(unsigned char* p
, int r
)
4312 uint32_t insn
= std_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4313 write_insn
<big_endian
>(p
, insn
);
4317 template<bool big_endian
>
4318 static unsigned char*
4319 savegpr1_tail(unsigned char* p
, int r
)
4321 p
= savegpr1
<big_endian
>(p
, r
);
4322 write_insn
<big_endian
>(p
, blr
);
4326 template<bool big_endian
>
4327 static unsigned char*
4328 restgpr1(unsigned char* p
, int r
)
4330 uint32_t insn
= ld_0_12
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4331 write_insn
<big_endian
>(p
, insn
);
4335 template<bool big_endian
>
4336 static unsigned char*
4337 restgpr1_tail(unsigned char* p
, int r
)
4339 p
= restgpr1
<big_endian
>(p
, r
);
4340 write_insn
<big_endian
>(p
, blr
);
4344 template<bool big_endian
>
4345 static unsigned char*
4346 savefpr(unsigned char* p
, int r
)
4348 uint32_t insn
= stfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4349 write_insn
<big_endian
>(p
, insn
);
4353 template<bool big_endian
>
4354 static unsigned char*
4355 savefpr0_tail(unsigned char* p
, int r
)
4357 p
= savefpr
<big_endian
>(p
, r
);
4358 write_insn
<big_endian
>(p
, std_0_1
+ 16);
4360 write_insn
<big_endian
>(p
, blr
);
4364 template<bool big_endian
>
4365 static unsigned char*
4366 restfpr(unsigned char* p
, int r
)
4368 uint32_t insn
= lfd_0_1
+ (r
<< 21) + (1 << 16) - (32 - r
) * 8;
4369 write_insn
<big_endian
>(p
, insn
);
4373 template<bool big_endian
>
4374 static unsigned char*
4375 restfpr0_tail(unsigned char* p
, int r
)
4377 write_insn
<big_endian
>(p
, ld_0_1
+ 16);
4379 p
= restfpr
<big_endian
>(p
, r
);
4380 write_insn
<big_endian
>(p
, mtlr_0
);
4384 p
= restfpr
<big_endian
>(p
, 30);
4385 p
= restfpr
<big_endian
>(p
, 31);
4387 write_insn
<big_endian
>(p
, blr
);
4391 template<bool big_endian
>
4392 static unsigned char*
4393 savefpr1_tail(unsigned char* p
, int r
)
4395 p
= savefpr
<big_endian
>(p
, r
);
4396 write_insn
<big_endian
>(p
, blr
);
4400 template<bool big_endian
>
4401 static unsigned char*
4402 restfpr1_tail(unsigned char* p
, int r
)
4404 p
= restfpr
<big_endian
>(p
, r
);
4405 write_insn
<big_endian
>(p
, blr
);
4409 template<bool big_endian
>
4410 static unsigned char*
4411 savevr(unsigned char* p
, int r
)
4413 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4414 write_insn
<big_endian
>(p
, insn
);
4416 insn
= stvx_0_12_0
+ (r
<< 21);
4417 write_insn
<big_endian
>(p
, insn
);
4421 template<bool big_endian
>
4422 static unsigned char*
4423 savevr_tail(unsigned char* p
, int r
)
4425 p
= savevr
<big_endian
>(p
, r
);
4426 write_insn
<big_endian
>(p
, blr
);
4430 template<bool big_endian
>
4431 static unsigned char*
4432 restvr(unsigned char* p
, int r
)
4434 uint32_t insn
= li_12_0
+ (1 << 16) - (32 - r
) * 16;
4435 write_insn
<big_endian
>(p
, insn
);
4437 insn
= lvx_0_12_0
+ (r
<< 21);
4438 write_insn
<big_endian
>(p
, insn
);
4442 template<bool big_endian
>
4443 static unsigned char*
4444 restvr_tail(unsigned char* p
, int r
)
4446 p
= restvr
<big_endian
>(p
, r
);
4447 write_insn
<big_endian
>(p
, blr
);
4452 template<int size
, bool big_endian
>
4453 Output_data_save_res
<size
, big_endian
>::Output_data_save_res(
4454 Symbol_table
* symtab
)
4455 : Output_section_data_build(4),
4458 this->savres_define(symtab
,
4459 "_savegpr0_", 14, 31,
4460 savegpr0
<big_endian
>, savegpr0_tail
<big_endian
>);
4461 this->savres_define(symtab
,
4462 "_restgpr0_", 14, 29,
4463 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4464 this->savres_define(symtab
,
4465 "_restgpr0_", 30, 31,
4466 restgpr0
<big_endian
>, restgpr0_tail
<big_endian
>);
4467 this->savres_define(symtab
,
4468 "_savegpr1_", 14, 31,
4469 savegpr1
<big_endian
>, savegpr1_tail
<big_endian
>);
4470 this->savres_define(symtab
,
4471 "_restgpr1_", 14, 31,
4472 restgpr1
<big_endian
>, restgpr1_tail
<big_endian
>);
4473 this->savres_define(symtab
,
4474 "_savefpr_", 14, 31,
4475 savefpr
<big_endian
>, savefpr0_tail
<big_endian
>);
4476 this->savres_define(symtab
,
4477 "_restfpr_", 14, 29,
4478 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4479 this->savres_define(symtab
,
4480 "_restfpr_", 30, 31,
4481 restfpr
<big_endian
>, restfpr0_tail
<big_endian
>);
4482 this->savres_define(symtab
,
4484 savefpr
<big_endian
>, savefpr1_tail
<big_endian
>);
4485 this->savres_define(symtab
,
4487 restfpr
<big_endian
>, restfpr1_tail
<big_endian
>);
4488 this->savres_define(symtab
,
4490 savevr
<big_endian
>, savevr_tail
<big_endian
>);
4491 this->savres_define(symtab
,
4493 restvr
<big_endian
>, restvr_tail
<big_endian
>);
4496 template<int size
, bool big_endian
>
4498 Output_data_save_res
<size
, big_endian
>::savres_define(
4499 Symbol_table
* symtab
,
4501 unsigned int lo
, unsigned int hi
,
4502 unsigned char* write_ent(unsigned char*, int),
4503 unsigned char* write_tail(unsigned char*, int))
4505 size_t len
= strlen(name
);
4506 bool writing
= false;
4509 memcpy(sym
, name
, len
);
4512 for (unsigned int i
= lo
; i
<= hi
; i
++)
4514 sym
[len
+ 0] = i
/ 10 + '0';
4515 sym
[len
+ 1] = i
% 10 + '0';
4516 Symbol
* gsym
= symtab
->lookup(sym
);
4517 bool refd
= gsym
!= NULL
&& gsym
->is_undefined();
4518 writing
= writing
|| refd
;
4521 if (this->contents_
== NULL
)
4522 this->contents_
= new unsigned char[this->savres_max
];
4524 section_size_type value
= this->current_data_size();
4525 unsigned char* p
= this->contents_
+ value
;
4527 p
= write_ent(p
, i
);
4529 p
= write_tail(p
, i
);
4530 section_size_type cur_size
= p
- this->contents_
;
4531 this->set_current_data_size(cur_size
);
4533 symtab
->define_in_output_data(sym
, NULL
, Symbol_table::PREDEFINED
,
4534 this, value
, cur_size
- value
,
4535 elfcpp::STT_FUNC
, elfcpp::STB_GLOBAL
,
4536 elfcpp::STV_HIDDEN
, 0, false, false);
4541 // Write out save/restore.
4543 template<int size
, bool big_endian
>
4545 Output_data_save_res
<size
, big_endian
>::do_write(Output_file
* of
)
4547 const section_size_type off
= this->offset();
4548 const section_size_type oview_size
=
4549 convert_to_section_size_type(this->data_size());
4550 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
4551 memcpy(oview
, this->contents_
, oview_size
);
4552 of
->write_output_view(off
, oview_size
, oview
);
4556 // Create the glink section.
4558 template<int size
, bool big_endian
>
4560 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
4562 if (this->glink_
== NULL
)
4564 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
4565 this->glink_
->add_eh_frame(layout
);
4566 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
4567 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
4568 this->glink_
, ORDER_TEXT
, false);
4572 // Create a PLT entry for a global symbol.
4574 template<int size
, bool big_endian
>
4576 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
4580 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
4581 && gsym
->can_use_relative_reloc(false))
4583 if (this->iplt_
== NULL
)
4584 this->make_iplt_section(symtab
, layout
);
4585 this->iplt_
->add_ifunc_entry(gsym
);
4589 if (this->plt_
== NULL
)
4590 this->make_plt_section(symtab
, layout
);
4591 this->plt_
->add_entry(gsym
);
4595 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4597 template<int size
, bool big_endian
>
4599 Target_powerpc
<size
, big_endian
>::make_local_ifunc_plt_entry(
4600 Symbol_table
* symtab
,
4602 Sized_relobj_file
<size
, big_endian
>* relobj
,
4605 if (this->iplt_
== NULL
)
4606 this->make_iplt_section(symtab
, layout
);
4607 this->iplt_
->add_local_ifunc_entry(relobj
, r_sym
);
4610 // Return the number of entries in the PLT.
4612 template<int size
, bool big_endian
>
4614 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
4616 if (this->plt_
== NULL
)
4618 return this->plt_
->entry_count();
4621 // Return the offset of the first non-reserved PLT entry.
4623 template<int size
, bool big_endian
>
4625 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
4627 return this->plt_
->first_plt_entry_offset();
4630 // Return the size of each PLT entry.
4632 template<int size
, bool big_endian
>
4634 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
4636 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
4639 // Create a GOT entry for local dynamic __tls_get_addr calls.
4641 template<int size
, bool big_endian
>
4643 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
4644 Symbol_table
* symtab
,
4646 Sized_relobj_file
<size
, big_endian
>* object
)
4648 if (this->tlsld_got_offset_
== -1U)
4650 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4651 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4652 Output_data_got_powerpc
<size
, big_endian
>* got
4653 = this->got_section(symtab
, layout
);
4654 unsigned int got_offset
= got
->add_constant_pair(0, 0);
4655 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
4657 this->tlsld_got_offset_
= got_offset
;
4659 return this->tlsld_got_offset_
;
4662 // Get the Reference_flags for a particular relocation.
4664 template<int size
, bool big_endian
>
4666 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
4670 case elfcpp::R_POWERPC_NONE
:
4671 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4672 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4673 case elfcpp::R_PPC64_TOC
:
4674 // No symbol reference.
4677 case elfcpp::R_PPC64_ADDR64
:
4678 case elfcpp::R_PPC64_UADDR64
:
4679 case elfcpp::R_POWERPC_ADDR32
:
4680 case elfcpp::R_POWERPC_UADDR32
:
4681 case elfcpp::R_POWERPC_ADDR16
:
4682 case elfcpp::R_POWERPC_UADDR16
:
4683 case elfcpp::R_POWERPC_ADDR16_LO
:
4684 case elfcpp::R_POWERPC_ADDR16_HI
:
4685 case elfcpp::R_POWERPC_ADDR16_HA
:
4686 return Symbol::ABSOLUTE_REF
;
4688 case elfcpp::R_POWERPC_ADDR24
:
4689 case elfcpp::R_POWERPC_ADDR14
:
4690 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4691 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4692 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
4694 case elfcpp::R_PPC64_REL64
:
4695 case elfcpp::R_POWERPC_REL32
:
4696 case elfcpp::R_PPC_LOCAL24PC
:
4697 case elfcpp::R_POWERPC_REL16
:
4698 case elfcpp::R_POWERPC_REL16_LO
:
4699 case elfcpp::R_POWERPC_REL16_HI
:
4700 case elfcpp::R_POWERPC_REL16_HA
:
4701 return Symbol::RELATIVE_REF
;
4703 case elfcpp::R_POWERPC_REL24
:
4704 case elfcpp::R_PPC_PLTREL24
:
4705 case elfcpp::R_POWERPC_REL14
:
4706 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4707 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4708 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
4710 case elfcpp::R_POWERPC_GOT16
:
4711 case elfcpp::R_POWERPC_GOT16_LO
:
4712 case elfcpp::R_POWERPC_GOT16_HI
:
4713 case elfcpp::R_POWERPC_GOT16_HA
:
4714 case elfcpp::R_PPC64_GOT16_DS
:
4715 case elfcpp::R_PPC64_GOT16_LO_DS
:
4716 case elfcpp::R_PPC64_TOC16
:
4717 case elfcpp::R_PPC64_TOC16_LO
:
4718 case elfcpp::R_PPC64_TOC16_HI
:
4719 case elfcpp::R_PPC64_TOC16_HA
:
4720 case elfcpp::R_PPC64_TOC16_DS
:
4721 case elfcpp::R_PPC64_TOC16_LO_DS
:
4723 return Symbol::ABSOLUTE_REF
;
4725 case elfcpp::R_POWERPC_GOT_TPREL16
:
4726 case elfcpp::R_POWERPC_TLS
:
4727 return Symbol::TLS_REF
;
4729 case elfcpp::R_POWERPC_COPY
:
4730 case elfcpp::R_POWERPC_GLOB_DAT
:
4731 case elfcpp::R_POWERPC_JMP_SLOT
:
4732 case elfcpp::R_POWERPC_RELATIVE
:
4733 case elfcpp::R_POWERPC_DTPMOD
:
4735 // Not expected. We will give an error later.
4740 // Report an unsupported relocation against a local symbol.
4742 template<int size
, bool big_endian
>
4744 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
4745 Sized_relobj_file
<size
, big_endian
>* object
,
4746 unsigned int r_type
)
4748 gold_error(_("%s: unsupported reloc %u against local symbol"),
4749 object
->name().c_str(), r_type
);
4752 // We are about to emit a dynamic relocation of type R_TYPE. If the
4753 // dynamic linker does not support it, issue an error.
4755 template<int size
, bool big_endian
>
4757 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4758 unsigned int r_type
)
4760 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
4762 // These are the relocation types supported by glibc for both 32-bit
4763 // and 64-bit powerpc.
4766 case elfcpp::R_POWERPC_NONE
:
4767 case elfcpp::R_POWERPC_RELATIVE
:
4768 case elfcpp::R_POWERPC_GLOB_DAT
:
4769 case elfcpp::R_POWERPC_DTPMOD
:
4770 case elfcpp::R_POWERPC_DTPREL
:
4771 case elfcpp::R_POWERPC_TPREL
:
4772 case elfcpp::R_POWERPC_JMP_SLOT
:
4773 case elfcpp::R_POWERPC_COPY
:
4774 case elfcpp::R_POWERPC_IRELATIVE
:
4775 case elfcpp::R_POWERPC_ADDR32
:
4776 case elfcpp::R_POWERPC_UADDR32
:
4777 case elfcpp::R_POWERPC_ADDR24
:
4778 case elfcpp::R_POWERPC_ADDR16
:
4779 case elfcpp::R_POWERPC_UADDR16
:
4780 case elfcpp::R_POWERPC_ADDR16_LO
:
4781 case elfcpp::R_POWERPC_ADDR16_HI
:
4782 case elfcpp::R_POWERPC_ADDR16_HA
:
4783 case elfcpp::R_POWERPC_ADDR14
:
4784 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4785 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4786 case elfcpp::R_POWERPC_REL32
:
4787 case elfcpp::R_POWERPC_REL24
:
4788 case elfcpp::R_POWERPC_TPREL16
:
4789 case elfcpp::R_POWERPC_TPREL16_LO
:
4790 case elfcpp::R_POWERPC_TPREL16_HI
:
4791 case elfcpp::R_POWERPC_TPREL16_HA
:
4802 // These are the relocation types supported only on 64-bit.
4803 case elfcpp::R_PPC64_ADDR64
:
4804 case elfcpp::R_PPC64_UADDR64
:
4805 case elfcpp::R_PPC64_JMP_IREL
:
4806 case elfcpp::R_PPC64_ADDR16_DS
:
4807 case elfcpp::R_PPC64_ADDR16_LO_DS
:
4808 case elfcpp::R_PPC64_ADDR16_HIGHER
:
4809 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
4810 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
4811 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
4812 case elfcpp::R_PPC64_REL64
:
4813 case elfcpp::R_POWERPC_ADDR30
:
4814 case elfcpp::R_PPC64_TPREL16_DS
:
4815 case elfcpp::R_PPC64_TPREL16_LO_DS
:
4816 case elfcpp::R_PPC64_TPREL16_HIGHER
:
4817 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
4818 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
4819 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
4830 // These are the relocation types supported only on 32-bit.
4831 // ??? glibc ld.so doesn't need to support these.
4832 case elfcpp::R_POWERPC_DTPREL16
:
4833 case elfcpp::R_POWERPC_DTPREL16_LO
:
4834 case elfcpp::R_POWERPC_DTPREL16_HI
:
4835 case elfcpp::R_POWERPC_DTPREL16_HA
:
4843 // This prevents us from issuing more than one error per reloc
4844 // section. But we can still wind up issuing more than one
4845 // error per object file.
4846 if (this->issued_non_pic_error_
)
4848 gold_assert(parameters
->options().output_is_position_independent());
4849 object
->error(_("requires unsupported dynamic reloc; "
4850 "recompile with -fPIC"));
4851 this->issued_non_pic_error_
= true;
4855 // Return whether we need to make a PLT entry for a relocation of the
4856 // given type against a STT_GNU_IFUNC symbol.
4858 template<int size
, bool big_endian
>
4860 Target_powerpc
<size
, big_endian
>::Scan::reloc_needs_plt_for_ifunc(
4861 Sized_relobj_file
<size
, big_endian
>* object
,
4862 unsigned int r_type
,
4865 // In non-pic code any reference will resolve to the plt call stub
4866 // for the ifunc symbol.
4867 if (size
== 32 && !parameters
->options().output_is_position_independent())
4872 // Word size refs from data sections are OK, but don't need a PLT entry.
4873 case elfcpp::R_POWERPC_ADDR32
:
4874 case elfcpp::R_POWERPC_UADDR32
:
4879 case elfcpp::R_PPC64_ADDR64
:
4880 case elfcpp::R_PPC64_UADDR64
:
4885 // GOT refs are good, but also don't need a PLT entry.
4886 case elfcpp::R_POWERPC_GOT16
:
4887 case elfcpp::R_POWERPC_GOT16_LO
:
4888 case elfcpp::R_POWERPC_GOT16_HI
:
4889 case elfcpp::R_POWERPC_GOT16_HA
:
4890 case elfcpp::R_PPC64_GOT16_DS
:
4891 case elfcpp::R_PPC64_GOT16_LO_DS
:
4894 // Function calls are good, and these do need a PLT entry.
4895 case elfcpp::R_POWERPC_ADDR24
:
4896 case elfcpp::R_POWERPC_ADDR14
:
4897 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
4898 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
4899 case elfcpp::R_POWERPC_REL24
:
4900 case elfcpp::R_PPC_PLTREL24
:
4901 case elfcpp::R_POWERPC_REL14
:
4902 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
4903 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
4910 // Anything else is a problem.
4911 // If we are building a static executable, the libc startup function
4912 // responsible for applying indirect function relocations is going
4913 // to complain about the reloc type.
4914 // If we are building a dynamic executable, we will have a text
4915 // relocation. The dynamic loader will set the text segment
4916 // writable and non-executable to apply text relocations. So we'll
4917 // segfault when trying to run the indirection function to resolve
4920 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4921 object
->name().c_str(), r_type
);
4925 // Scan a relocation for a local symbol.
4927 template<int size
, bool big_endian
>
4929 Target_powerpc
<size
, big_endian
>::Scan::local(
4930 Symbol_table
* symtab
,
4932 Target_powerpc
<size
, big_endian
>* target
,
4933 Sized_relobj_file
<size
, big_endian
>* object
,
4934 unsigned int data_shndx
,
4935 Output_section
* output_section
,
4936 const elfcpp::Rela
<size
, big_endian
>& reloc
,
4937 unsigned int r_type
,
4938 const elfcpp::Sym
<size
, big_endian
>& lsym
,
4941 this->maybe_skip_tls_get_addr_call(r_type
, NULL
);
4943 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4944 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4946 this->expect_tls_get_addr_call();
4947 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
4948 if (tls_type
!= tls::TLSOPT_NONE
)
4949 this->skip_next_tls_get_addr_call();
4951 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4952 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4954 this->expect_tls_get_addr_call();
4955 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
4956 if (tls_type
!= tls::TLSOPT_NONE
)
4957 this->skip_next_tls_get_addr_call();
4960 Powerpc_relobj
<size
, big_endian
>* ppc_object
4961 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
4966 && data_shndx
== ppc_object
->opd_shndx()
4967 && r_type
== elfcpp::R_PPC64_ADDR64
)
4968 ppc_object
->set_opd_discard(reloc
.get_r_offset());
4972 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4973 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
4974 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
4976 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
4977 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
4978 r_type
, r_sym
, reloc
.get_r_addend());
4979 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
4984 case elfcpp::R_POWERPC_NONE
:
4985 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
4986 case elfcpp::R_POWERPC_GNU_VTENTRY
:
4987 case elfcpp::R_PPC64_TOCSAVE
:
4988 case elfcpp::R_PPC_EMB_MRKREF
:
4989 case elfcpp::R_POWERPC_TLS
:
4992 case elfcpp::R_PPC64_TOC
:
4994 Output_data_got_powerpc
<size
, big_endian
>* got
4995 = target
->got_section(symtab
, layout
);
4996 if (parameters
->options().output_is_position_independent())
4998 Address off
= reloc
.get_r_offset();
5000 && data_shndx
== ppc_object
->opd_shndx()
5001 && ppc_object
->get_opd_discard(off
- 8))
5004 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5005 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5006 rela_dyn
->add_output_section_relative(got
->output_section(),
5007 elfcpp::R_POWERPC_RELATIVE
,
5009 object
, data_shndx
, off
,
5010 symobj
->toc_base_offset());
5015 case elfcpp::R_PPC64_ADDR64
:
5016 case elfcpp::R_PPC64_UADDR64
:
5017 case elfcpp::R_POWERPC_ADDR32
:
5018 case elfcpp::R_POWERPC_UADDR32
:
5019 case elfcpp::R_POWERPC_ADDR24
:
5020 case elfcpp::R_POWERPC_ADDR16
:
5021 case elfcpp::R_POWERPC_ADDR16_LO
:
5022 case elfcpp::R_POWERPC_ADDR16_HI
:
5023 case elfcpp::R_POWERPC_ADDR16_HA
:
5024 case elfcpp::R_POWERPC_UADDR16
:
5025 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5026 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5027 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5028 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5029 case elfcpp::R_PPC64_ADDR16_DS
:
5030 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5031 case elfcpp::R_POWERPC_ADDR14
:
5032 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5033 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5034 // If building a shared library (or a position-independent
5035 // executable), we need to create a dynamic relocation for
5037 if (parameters
->options().output_is_position_independent()
5038 || (size
== 64 && is_ifunc
))
5040 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5042 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
5043 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
5045 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5046 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5047 : elfcpp::R_POWERPC_RELATIVE
);
5048 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5049 output_section
, data_shndx
,
5050 reloc
.get_r_offset(),
5051 reloc
.get_r_addend(), false);
5055 check_non_pic(object
, r_type
);
5056 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5057 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
5058 data_shndx
, reloc
.get_r_offset(),
5059 reloc
.get_r_addend());
5064 case elfcpp::R_POWERPC_REL24
:
5065 case elfcpp::R_PPC_PLTREL24
:
5066 case elfcpp::R_PPC_LOCAL24PC
:
5067 case elfcpp::R_POWERPC_REL14
:
5068 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5069 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5071 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5072 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5073 reloc
.get_r_addend());
5076 case elfcpp::R_PPC64_REL64
:
5077 case elfcpp::R_POWERPC_REL32
:
5078 case elfcpp::R_POWERPC_REL16
:
5079 case elfcpp::R_POWERPC_REL16_LO
:
5080 case elfcpp::R_POWERPC_REL16_HI
:
5081 case elfcpp::R_POWERPC_REL16_HA
:
5082 case elfcpp::R_POWERPC_SECTOFF
:
5083 case elfcpp::R_POWERPC_TPREL16
:
5084 case elfcpp::R_POWERPC_DTPREL16
:
5085 case elfcpp::R_POWERPC_SECTOFF_LO
:
5086 case elfcpp::R_POWERPC_TPREL16_LO
:
5087 case elfcpp::R_POWERPC_DTPREL16_LO
:
5088 case elfcpp::R_POWERPC_SECTOFF_HI
:
5089 case elfcpp::R_POWERPC_TPREL16_HI
:
5090 case elfcpp::R_POWERPC_DTPREL16_HI
:
5091 case elfcpp::R_POWERPC_SECTOFF_HA
:
5092 case elfcpp::R_POWERPC_TPREL16_HA
:
5093 case elfcpp::R_POWERPC_DTPREL16_HA
:
5094 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5095 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5096 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5097 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5098 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5099 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5100 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5101 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5102 case elfcpp::R_PPC64_TPREL16_DS
:
5103 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5104 case elfcpp::R_PPC64_DTPREL16_DS
:
5105 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5106 case elfcpp::R_PPC64_SECTOFF_DS
:
5107 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5108 case elfcpp::R_PPC64_TLSGD
:
5109 case elfcpp::R_PPC64_TLSLD
:
5112 case elfcpp::R_POWERPC_GOT16
:
5113 case elfcpp::R_POWERPC_GOT16_LO
:
5114 case elfcpp::R_POWERPC_GOT16_HI
:
5115 case elfcpp::R_POWERPC_GOT16_HA
:
5116 case elfcpp::R_PPC64_GOT16_DS
:
5117 case elfcpp::R_PPC64_GOT16_LO_DS
:
5119 // The symbol requires a GOT entry.
5120 Output_data_got_powerpc
<size
, big_endian
>* got
5121 = target
->got_section(symtab
, layout
);
5122 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5124 if (!parameters
->options().output_is_position_independent())
5126 if (size
== 32 && is_ifunc
)
5127 got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
5129 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
5131 else if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
5133 // If we are generating a shared object or a pie, this
5134 // symbol's GOT entry will be set by a dynamic relocation.
5136 off
= got
->add_constant(0);
5137 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
5139 Reloc_section
* rela_dyn
= target
->rela_dyn_section(symtab
, layout
,
5141 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5142 : elfcpp::R_POWERPC_RELATIVE
);
5143 rela_dyn
->add_local_relative(object
, r_sym
, dynrel
,
5144 got
, off
, 0, false);
5149 case elfcpp::R_PPC64_TOC16
:
5150 case elfcpp::R_PPC64_TOC16_LO
:
5151 case elfcpp::R_PPC64_TOC16_HI
:
5152 case elfcpp::R_PPC64_TOC16_HA
:
5153 case elfcpp::R_PPC64_TOC16_DS
:
5154 case elfcpp::R_PPC64_TOC16_LO_DS
:
5155 // We need a GOT section.
5156 target
->got_section(symtab
, layout
);
5159 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5160 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5161 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5162 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5164 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
5165 if (tls_type
== tls::TLSOPT_NONE
)
5167 Output_data_got_powerpc
<size
, big_endian
>* got
5168 = target
->got_section(symtab
, layout
);
5169 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5170 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5171 got
->add_local_tls_pair(object
, r_sym
, GOT_TYPE_TLSGD
,
5172 rela_dyn
, elfcpp::R_POWERPC_DTPMOD
);
5174 else if (tls_type
== tls::TLSOPT_TO_LE
)
5176 // no GOT relocs needed for Local Exec.
5183 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5184 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5185 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5186 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5188 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5189 if (tls_type
== tls::TLSOPT_NONE
)
5190 target
->tlsld_got_offset(symtab
, layout
, object
);
5191 else if (tls_type
== tls::TLSOPT_TO_LE
)
5193 // no GOT relocs needed for Local Exec.
5194 if (parameters
->options().emit_relocs())
5196 Output_section
* os
= layout
->tls_segment()->first_section();
5197 gold_assert(os
!= NULL
);
5198 os
->set_needs_symtab_index();
5206 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5207 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5208 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5209 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5211 Output_data_got_powerpc
<size
, big_endian
>* got
5212 = target
->got_section(symtab
, layout
);
5213 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5214 got
->add_local_tls(object
, r_sym
, GOT_TYPE_DTPREL
);
5218 case elfcpp::R_POWERPC_GOT_TPREL16
:
5219 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5220 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5221 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5223 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
5224 if (tls_type
== tls::TLSOPT_NONE
)
5226 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
5227 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
))
5229 Output_data_got_powerpc
<size
, big_endian
>* got
5230 = target
->got_section(symtab
, layout
);
5231 unsigned int off
= got
->add_constant(0);
5232 object
->set_local_got_offset(r_sym
, GOT_TYPE_TPREL
, off
);
5234 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5235 rela_dyn
->add_symbolless_local_addend(object
, r_sym
,
5236 elfcpp::R_POWERPC_TPREL
,
5240 else if (tls_type
== tls::TLSOPT_TO_LE
)
5242 // no GOT relocs needed for Local Exec.
5250 unsupported_reloc_local(object
, r_type
);
5256 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5257 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5258 case elfcpp::R_POWERPC_GOT_TPREL16
:
5259 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5260 case elfcpp::R_POWERPC_GOT16
:
5261 case elfcpp::R_PPC64_GOT16_DS
:
5262 case elfcpp::R_PPC64_TOC16
:
5263 case elfcpp::R_PPC64_TOC16_DS
:
5264 ppc_object
->set_has_small_toc_reloc();
5270 // Report an unsupported relocation against a global symbol.
5272 template<int size
, bool big_endian
>
5274 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
5275 Sized_relobj_file
<size
, big_endian
>* object
,
5276 unsigned int r_type
,
5279 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
5280 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
5283 // Scan a relocation for a global symbol.
5285 template<int size
, bool big_endian
>
5287 Target_powerpc
<size
, big_endian
>::Scan::global(
5288 Symbol_table
* symtab
,
5290 Target_powerpc
<size
, big_endian
>* target
,
5291 Sized_relobj_file
<size
, big_endian
>* object
,
5292 unsigned int data_shndx
,
5293 Output_section
* output_section
,
5294 const elfcpp::Rela
<size
, big_endian
>& reloc
,
5295 unsigned int r_type
,
5298 if (this->maybe_skip_tls_get_addr_call(r_type
, gsym
) == Track_tls::SKIP
)
5301 if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
5302 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
5304 this->expect_tls_get_addr_call();
5305 const bool final
= gsym
->final_value_is_known();
5306 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5307 if (tls_type
!= tls::TLSOPT_NONE
)
5308 this->skip_next_tls_get_addr_call();
5310 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
5311 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
5313 this->expect_tls_get_addr_call();
5314 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5315 if (tls_type
!= tls::TLSOPT_NONE
)
5316 this->skip_next_tls_get_addr_call();
5319 Powerpc_relobj
<size
, big_endian
>* ppc_object
5320 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5322 // A STT_GNU_IFUNC symbol may require a PLT entry.
5323 bool is_ifunc
= gsym
->type() == elfcpp::STT_GNU_IFUNC
;
5324 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
, true))
5326 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5327 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5328 reloc
.get_r_addend());
5329 target
->make_plt_entry(symtab
, layout
, gsym
);
5334 case elfcpp::R_POWERPC_NONE
:
5335 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
5336 case elfcpp::R_POWERPC_GNU_VTENTRY
:
5337 case elfcpp::R_PPC_LOCAL24PC
:
5338 case elfcpp::R_PPC_EMB_MRKREF
:
5339 case elfcpp::R_POWERPC_TLS
:
5342 case elfcpp::R_PPC64_TOC
:
5344 Output_data_got_powerpc
<size
, big_endian
>* got
5345 = target
->got_section(symtab
, layout
);
5346 if (parameters
->options().output_is_position_independent())
5348 Address off
= reloc
.get_r_offset();
5350 && data_shndx
== ppc_object
->opd_shndx()
5351 && ppc_object
->get_opd_discard(off
- 8))
5354 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5355 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
5356 if (data_shndx
!= ppc_object
->opd_shndx())
5357 symobj
= static_cast
5358 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
5359 rela_dyn
->add_output_section_relative(got
->output_section(),
5360 elfcpp::R_POWERPC_RELATIVE
,
5362 object
, data_shndx
, off
,
5363 symobj
->toc_base_offset());
5368 case elfcpp::R_PPC64_ADDR64
:
5370 && data_shndx
== ppc_object
->opd_shndx()
5371 && (gsym
->is_defined_in_discarded_section()
5372 || gsym
->object() != object
))
5374 ppc_object
->set_opd_discard(reloc
.get_r_offset());
5378 case elfcpp::R_PPC64_UADDR64
:
5379 case elfcpp::R_POWERPC_ADDR32
:
5380 case elfcpp::R_POWERPC_UADDR32
:
5381 case elfcpp::R_POWERPC_ADDR24
:
5382 case elfcpp::R_POWERPC_ADDR16
:
5383 case elfcpp::R_POWERPC_ADDR16_LO
:
5384 case elfcpp::R_POWERPC_ADDR16_HI
:
5385 case elfcpp::R_POWERPC_ADDR16_HA
:
5386 case elfcpp::R_POWERPC_UADDR16
:
5387 case elfcpp::R_PPC64_ADDR16_HIGHER
:
5388 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
5389 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
5390 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
5391 case elfcpp::R_PPC64_ADDR16_DS
:
5392 case elfcpp::R_PPC64_ADDR16_LO_DS
:
5393 case elfcpp::R_POWERPC_ADDR14
:
5394 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
5395 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
5397 // Make a PLT entry if necessary.
5398 if (gsym
->needs_plt_entry())
5402 target
->push_branch(ppc_object
, data_shndx
,
5403 reloc
.get_r_offset(), r_type
,
5404 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5405 reloc
.get_r_addend());
5406 target
->make_plt_entry(symtab
, layout
, gsym
);
5408 // Since this is not a PC-relative relocation, we may be
5409 // taking the address of a function. In that case we need to
5410 // set the entry in the dynamic symbol table to the address of
5411 // the PLT call stub.
5413 && gsym
->is_from_dynobj()
5414 && !parameters
->options().output_is_position_independent())
5415 gsym
->set_needs_dynsym_value();
5417 // Make a dynamic relocation if necessary.
5418 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
))
5419 || (size
== 64 && is_ifunc
))
5421 if (gsym
->may_need_copy_reloc())
5423 target
->copy_reloc(symtab
, layout
, object
,
5424 data_shndx
, output_section
, gsym
, reloc
);
5426 else if ((size
== 32
5427 && r_type
== elfcpp::R_POWERPC_ADDR32
5428 && gsym
->can_use_relative_reloc(false)
5429 && !(gsym
->visibility() == elfcpp::STV_PROTECTED
5430 && parameters
->options().shared()))
5432 && r_type
== elfcpp::R_PPC64_ADDR64
5433 && (gsym
->can_use_relative_reloc(false)
5434 || data_shndx
== ppc_object
->opd_shndx())))
5436 Reloc_section
* rela_dyn
5437 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5438 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5439 : elfcpp::R_POWERPC_RELATIVE
);
5440 rela_dyn
->add_symbolless_global_addend(
5441 gsym
, dynrel
, output_section
, object
, data_shndx
,
5442 reloc
.get_r_offset(), reloc
.get_r_addend());
5446 Reloc_section
* rela_dyn
5447 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5448 check_non_pic(object
, r_type
);
5449 rela_dyn
->add_global(gsym
, r_type
, output_section
,
5451 reloc
.get_r_offset(),
5452 reloc
.get_r_addend());
5458 case elfcpp::R_PPC_PLTREL24
:
5459 case elfcpp::R_POWERPC_REL24
:
5462 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5464 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5465 reloc
.get_r_addend());
5466 if (gsym
->needs_plt_entry()
5467 || (!gsym
->final_value_is_known()
5468 && (gsym
->is_undefined()
5469 || gsym
->is_from_dynobj()
5470 || gsym
->is_preemptible())))
5471 target
->make_plt_entry(symtab
, layout
, gsym
);
5475 case elfcpp::R_PPC64_REL64
:
5476 case elfcpp::R_POWERPC_REL32
:
5477 // Make a dynamic relocation if necessary.
5478 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
5480 if (gsym
->may_need_copy_reloc())
5482 target
->copy_reloc(symtab
, layout
, object
,
5483 data_shndx
, output_section
, gsym
,
5488 Reloc_section
* rela_dyn
5489 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5490 check_non_pic(object
, r_type
);
5491 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
5492 data_shndx
, reloc
.get_r_offset(),
5493 reloc
.get_r_addend());
5498 case elfcpp::R_POWERPC_REL14
:
5499 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
5500 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
5502 target
->push_branch(ppc_object
, data_shndx
, reloc
.get_r_offset(),
5503 r_type
, elfcpp::elf_r_sym
<size
>(reloc
.get_r_info()),
5504 reloc
.get_r_addend());
5507 case elfcpp::R_POWERPC_REL16
:
5508 case elfcpp::R_POWERPC_REL16_LO
:
5509 case elfcpp::R_POWERPC_REL16_HI
:
5510 case elfcpp::R_POWERPC_REL16_HA
:
5511 case elfcpp::R_POWERPC_SECTOFF
:
5512 case elfcpp::R_POWERPC_TPREL16
:
5513 case elfcpp::R_POWERPC_DTPREL16
:
5514 case elfcpp::R_POWERPC_SECTOFF_LO
:
5515 case elfcpp::R_POWERPC_TPREL16_LO
:
5516 case elfcpp::R_POWERPC_DTPREL16_LO
:
5517 case elfcpp::R_POWERPC_SECTOFF_HI
:
5518 case elfcpp::R_POWERPC_TPREL16_HI
:
5519 case elfcpp::R_POWERPC_DTPREL16_HI
:
5520 case elfcpp::R_POWERPC_SECTOFF_HA
:
5521 case elfcpp::R_POWERPC_TPREL16_HA
:
5522 case elfcpp::R_POWERPC_DTPREL16_HA
:
5523 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
5524 case elfcpp::R_PPC64_TPREL16_HIGHER
:
5525 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
5526 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
5527 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
5528 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
5529 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
5530 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
5531 case elfcpp::R_PPC64_TPREL16_DS
:
5532 case elfcpp::R_PPC64_TPREL16_LO_DS
:
5533 case elfcpp::R_PPC64_DTPREL16_DS
:
5534 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
5535 case elfcpp::R_PPC64_SECTOFF_DS
:
5536 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
5537 case elfcpp::R_PPC64_TLSGD
:
5538 case elfcpp::R_PPC64_TLSLD
:
5541 case elfcpp::R_POWERPC_GOT16
:
5542 case elfcpp::R_POWERPC_GOT16_LO
:
5543 case elfcpp::R_POWERPC_GOT16_HI
:
5544 case elfcpp::R_POWERPC_GOT16_HA
:
5545 case elfcpp::R_PPC64_GOT16_DS
:
5546 case elfcpp::R_PPC64_GOT16_LO_DS
:
5548 // The symbol requires a GOT entry.
5549 Output_data_got_powerpc
<size
, big_endian
>* got
;
5551 got
= target
->got_section(symtab
, layout
);
5552 if (gsym
->final_value_is_known())
5554 if (size
== 32 && is_ifunc
)
5555 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
5557 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
5559 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
5561 // If we are generating a shared object or a pie, this
5562 // symbol's GOT entry will be set by a dynamic relocation.
5563 unsigned int off
= got
->add_constant(0);
5564 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
5566 Reloc_section
* rela_dyn
5567 = target
->rela_dyn_section(symtab
, layout
, is_ifunc
);
5569 if (gsym
->can_use_relative_reloc(false)
5571 && gsym
->visibility() == elfcpp::STV_PROTECTED
5572 && parameters
->options().shared()))
5574 unsigned int dynrel
= (is_ifunc
? elfcpp::R_POWERPC_IRELATIVE
5575 : elfcpp::R_POWERPC_RELATIVE
);
5576 rela_dyn
->add_global_relative(gsym
, dynrel
, got
, off
, 0, false);
5580 unsigned int dynrel
= elfcpp::R_POWERPC_GLOB_DAT
;
5581 rela_dyn
->add_global(gsym
, dynrel
, got
, off
, 0);
5587 case elfcpp::R_PPC64_TOC16
:
5588 case elfcpp::R_PPC64_TOC16_LO
:
5589 case elfcpp::R_PPC64_TOC16_HI
:
5590 case elfcpp::R_PPC64_TOC16_HA
:
5591 case elfcpp::R_PPC64_TOC16_DS
:
5592 case elfcpp::R_PPC64_TOC16_LO_DS
:
5593 // We need a GOT section.
5594 target
->got_section(symtab
, layout
);
5597 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5598 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
5599 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
5600 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
5602 const bool final
= gsym
->final_value_is_known();
5603 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
5604 if (tls_type
== tls::TLSOPT_NONE
)
5606 Output_data_got_powerpc
<size
, big_endian
>* got
5607 = target
->got_section(symtab
, layout
);
5608 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5609 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
, rela_dyn
,
5610 elfcpp::R_POWERPC_DTPMOD
,
5611 elfcpp::R_POWERPC_DTPREL
);
5613 else if (tls_type
== tls::TLSOPT_TO_IE
)
5615 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5617 Output_data_got_powerpc
<size
, big_endian
>* got
5618 = target
->got_section(symtab
, layout
);
5619 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5620 if (gsym
->is_undefined()
5621 || gsym
->is_from_dynobj())
5623 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5624 elfcpp::R_POWERPC_TPREL
);
5628 unsigned int off
= got
->add_constant(0);
5629 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5630 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5631 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5636 else if (tls_type
== tls::TLSOPT_TO_LE
)
5638 // no GOT relocs needed for Local Exec.
5645 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5646 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
5647 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
5648 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
5650 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
5651 if (tls_type
== tls::TLSOPT_NONE
)
5652 target
->tlsld_got_offset(symtab
, layout
, object
);
5653 else if (tls_type
== tls::TLSOPT_TO_LE
)
5655 // no GOT relocs needed for Local Exec.
5656 if (parameters
->options().emit_relocs())
5658 Output_section
* os
= layout
->tls_segment()->first_section();
5659 gold_assert(os
!= NULL
);
5660 os
->set_needs_symtab_index();
5668 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5669 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
5670 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
5671 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
5673 Output_data_got_powerpc
<size
, big_endian
>* got
5674 = target
->got_section(symtab
, layout
);
5675 if (!gsym
->final_value_is_known()
5676 && (gsym
->is_from_dynobj()
5677 || gsym
->is_undefined()
5678 || gsym
->is_preemptible()))
5679 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
5680 target
->rela_dyn_section(layout
),
5681 elfcpp::R_POWERPC_DTPREL
);
5683 got
->add_global_tls(gsym
, GOT_TYPE_DTPREL
);
5687 case elfcpp::R_POWERPC_GOT_TPREL16
:
5688 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
5689 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
5690 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
5692 const bool final
= gsym
->final_value_is_known();
5693 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
5694 if (tls_type
== tls::TLSOPT_NONE
)
5696 if (!gsym
->has_got_offset(GOT_TYPE_TPREL
))
5698 Output_data_got_powerpc
<size
, big_endian
>* got
5699 = target
->got_section(symtab
, layout
);
5700 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
5701 if (gsym
->is_undefined()
5702 || gsym
->is_from_dynobj())
5704 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
, rela_dyn
,
5705 elfcpp::R_POWERPC_TPREL
);
5709 unsigned int off
= got
->add_constant(0);
5710 gsym
->set_got_offset(GOT_TYPE_TPREL
, off
);
5711 unsigned int dynrel
= elfcpp::R_POWERPC_TPREL
;
5712 rela_dyn
->add_symbolless_global_addend(gsym
, dynrel
,
5717 else if (tls_type
== tls::TLSOPT_TO_LE
)
5719 // no GOT relocs needed for Local Exec.
5727 unsupported_reloc_global(object
, r_type
, gsym
);
5733 case elfcpp::R_POWERPC_GOT_TLSLD16
:
5734 case elfcpp::R_POWERPC_GOT_TLSGD16
:
5735 case elfcpp::R_POWERPC_GOT_TPREL16
:
5736 case elfcpp::R_POWERPC_GOT_DTPREL16
:
5737 case elfcpp::R_POWERPC_GOT16
:
5738 case elfcpp::R_PPC64_GOT16_DS
:
5739 case elfcpp::R_PPC64_TOC16
:
5740 case elfcpp::R_PPC64_TOC16_DS
:
5741 ppc_object
->set_has_small_toc_reloc();
5747 // Process relocations for gc.
5749 template<int size
, bool big_endian
>
5751 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
5752 Symbol_table
* symtab
,
5754 Sized_relobj_file
<size
, big_endian
>* object
,
5755 unsigned int data_shndx
,
5757 const unsigned char* prelocs
,
5759 Output_section
* output_section
,
5760 bool needs_special_offset_handling
,
5761 size_t local_symbol_count
,
5762 const unsigned char* plocal_symbols
)
5764 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5765 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5766 Powerpc_relobj
<size
, big_endian
>* ppc_object
5767 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
5769 ppc_object
->set_opd_valid();
5770 if (size
== 64 && data_shndx
== ppc_object
->opd_shndx())
5772 typename Powerpc_relobj
<size
, big_endian
>::Access_from::iterator p
;
5773 for (p
= ppc_object
->access_from_map()->begin();
5774 p
!= ppc_object
->access_from_map()->end();
5777 Address dst_off
= p
->first
;
5778 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5779 typename Powerpc_relobj
<size
, big_endian
>::Section_refs::iterator s
;
5780 for (s
= p
->second
.begin(); s
!= p
->second
.end(); ++s
)
5782 Object
* src_obj
= s
->first
;
5783 unsigned int src_indx
= s
->second
;
5784 symtab
->gc()->add_reference(src_obj
, src_indx
,
5785 ppc_object
, dst_indx
);
5789 ppc_object
->access_from_map()->clear();
5790 ppc_object
->process_gc_mark(symtab
);
5791 // Don't look at .opd relocs as .opd will reference everything.
5795 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
5796 typename
Target_powerpc::Relocatable_size_for_reloc
>(
5805 needs_special_offset_handling
,
5810 // Handle target specific gc actions when adding a gc reference from
5811 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5812 // and DST_OFF. For powerpc64, this adds a referenc to the code
5813 // section of a function descriptor.
5815 template<int size
, bool big_endian
>
5817 Target_powerpc
<size
, big_endian
>::do_gc_add_reference(
5818 Symbol_table
* symtab
,
5820 unsigned int src_shndx
,
5822 unsigned int dst_shndx
,
5823 Address dst_off
) const
5825 if (size
!= 64 || dst_obj
->is_dynamic())
5828 Powerpc_relobj
<size
, big_endian
>* ppc_object
5829 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(dst_obj
);
5830 if (dst_shndx
== ppc_object
->opd_shndx())
5832 if (ppc_object
->opd_valid())
5834 dst_shndx
= ppc_object
->get_opd_ent(dst_off
);
5835 symtab
->gc()->add_reference(src_obj
, src_shndx
, dst_obj
, dst_shndx
);
5839 // If we haven't run scan_opd_relocs, we must delay
5840 // processing this function descriptor reference.
5841 ppc_object
->add_reference(src_obj
, src_shndx
, dst_off
);
5846 // Add any special sections for this symbol to the gc work list.
5847 // For powerpc64, this adds the code section of a function
5850 template<int size
, bool big_endian
>
5852 Target_powerpc
<size
, big_endian
>::do_gc_mark_symbol(
5853 Symbol_table
* symtab
,
5858 Powerpc_relobj
<size
, big_endian
>* ppc_object
5859 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(sym
->object());
5861 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5862 if (is_ordinary
&& shndx
== ppc_object
->opd_shndx())
5864 Sized_symbol
<size
>* gsym
= symtab
->get_sized_symbol
<size
>(sym
);
5865 Address dst_off
= gsym
->value();
5866 if (ppc_object
->opd_valid())
5868 unsigned int dst_indx
= ppc_object
->get_opd_ent(dst_off
);
5869 symtab
->gc()->worklist().push(Section_id(ppc_object
, dst_indx
));
5872 ppc_object
->add_gc_mark(dst_off
);
5877 // For a symbol location in .opd, set LOC to the location of the
5880 template<int size
, bool big_endian
>
5882 Target_powerpc
<size
, big_endian
>::do_function_location(
5883 Symbol_location
* loc
) const
5887 if (loc
->object
->is_dynamic())
5889 Powerpc_dynobj
<size
, big_endian
>* ppc_object
5890 = static_cast<Powerpc_dynobj
<size
, big_endian
>*>(loc
->object
);
5891 if (loc
->shndx
== ppc_object
->opd_shndx())
5894 Address off
= loc
->offset
- ppc_object
->opd_address();
5895 loc
->shndx
= ppc_object
->get_opd_ent(off
, &dest_off
);
5896 loc
->offset
= dest_off
;
5901 const Powerpc_relobj
<size
, big_endian
>* ppc_object
5902 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(loc
->object
);
5903 if (loc
->shndx
== ppc_object
->opd_shndx())
5906 loc
->shndx
= ppc_object
->get_opd_ent(loc
->offset
, &dest_off
);
5907 loc
->offset
= dest_off
;
5913 // Scan relocations for a section.
5915 template<int size
, bool big_endian
>
5917 Target_powerpc
<size
, big_endian
>::scan_relocs(
5918 Symbol_table
* symtab
,
5920 Sized_relobj_file
<size
, big_endian
>* object
,
5921 unsigned int data_shndx
,
5922 unsigned int sh_type
,
5923 const unsigned char* prelocs
,
5925 Output_section
* output_section
,
5926 bool needs_special_offset_handling
,
5927 size_t local_symbol_count
,
5928 const unsigned char* plocal_symbols
)
5930 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
5931 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
5933 if (sh_type
== elfcpp::SHT_REL
)
5935 gold_error(_("%s: unsupported REL reloc section"),
5936 object
->name().c_str());
5940 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
5949 needs_special_offset_handling
,
5954 // Functor class for processing the global symbol table.
5955 // Removes symbols defined on discarded opd entries.
5957 template<bool big_endian
>
5958 class Global_symbol_visitor_opd
5961 Global_symbol_visitor_opd()
5965 operator()(Sized_symbol
<64>* sym
)
5967 if (sym
->has_symtab_index()
5968 || sym
->source() != Symbol::FROM_OBJECT
5969 || !sym
->in_real_elf())
5972 if (sym
->object()->is_dynamic())
5975 Powerpc_relobj
<64, big_endian
>* symobj
5976 = static_cast<Powerpc_relobj
<64, big_endian
>*>(sym
->object());
5977 if (symobj
->opd_shndx() == 0)
5981 unsigned int shndx
= sym
->shndx(&is_ordinary
);
5982 if (shndx
== symobj
->opd_shndx()
5983 && symobj
->get_opd_discard(sym
->value()))
5984 sym
->set_symtab_index(-1U);
5988 template<int size
, bool big_endian
>
5990 Target_powerpc
<size
, big_endian
>::define_save_restore_funcs(
5992 Symbol_table
* symtab
)
5996 Output_data_save_res
<64, big_endian
>* savres
5997 = new Output_data_save_res
<64, big_endian
>(symtab
);
5998 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
5999 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
6000 savres
, ORDER_TEXT
, false);
6004 // Sort linker created .got section first (for the header), then input
6005 // sections belonging to files using small model code.
6007 template<bool big_endian
>
6008 class Sort_toc_sections
6012 operator()(const Output_section::Input_section
& is1
,
6013 const Output_section::Input_section
& is2
) const
6015 if (!is1
.is_input_section() && is2
.is_input_section())
6018 = (is1
.is_input_section()
6019 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is1
.relobj())
6020 ->has_small_toc_reloc()));
6022 = (is2
.is_input_section()
6023 && (static_cast<const Powerpc_relobj
<64, big_endian
>*>(is2
.relobj())
6024 ->has_small_toc_reloc()));
6025 return small1
&& !small2
;
6029 // Finalize the sections.
6031 template<int size
, bool big_endian
>
6033 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
6035 const Input_objects
*,
6036 Symbol_table
* symtab
)
6038 if (parameters
->doing_static_link())
6040 // At least some versions of glibc elf-init.o have a strong
6041 // reference to __rela_iplt marker syms. A weak ref would be
6043 if (this->iplt_
!= NULL
)
6045 Reloc_section
* rel
= this->iplt_
->rel_plt();
6046 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
6047 Symbol_table::PREDEFINED
, rel
, 0, 0,
6048 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6049 elfcpp::STV_HIDDEN
, 0, false, true);
6050 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
6051 Symbol_table::PREDEFINED
, rel
, 0, 0,
6052 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6053 elfcpp::STV_HIDDEN
, 0, true, true);
6057 symtab
->define_as_constant("__rela_iplt_start", NULL
,
6058 Symbol_table::PREDEFINED
, 0, 0,
6059 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6060 elfcpp::STV_HIDDEN
, 0, true, false);
6061 symtab
->define_as_constant("__rela_iplt_end", NULL
,
6062 Symbol_table::PREDEFINED
, 0, 0,
6063 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
6064 elfcpp::STV_HIDDEN
, 0, true, false);
6070 typedef Global_symbol_visitor_opd
<big_endian
> Symbol_visitor
;
6071 symtab
->for_all_symbols
<64, Symbol_visitor
>(Symbol_visitor());
6073 if (!parameters
->options().relocatable())
6075 this->define_save_restore_funcs(layout
, symtab
);
6077 // Annoyingly, we need to make these sections now whether or
6078 // not we need them. If we delay until do_relax then we
6079 // need to mess with the relaxation machinery checkpointing.
6080 this->got_section(symtab
, layout
);
6081 this->make_brlt_section(layout
);
6083 if (parameters
->options().toc_sort())
6085 Output_section
* os
= this->got_
->output_section();
6086 if (os
!= NULL
&& os
->input_sections().size() > 1)
6087 std::stable_sort(os
->input_sections().begin(),
6088 os
->input_sections().end(),
6089 Sort_toc_sections
<big_endian
>());
6094 // Fill in some more dynamic tags.
6095 Output_data_dynamic
* odyn
= layout
->dynamic_data();
6098 const Reloc_section
* rel_plt
= (this->plt_
== NULL
6100 : this->plt_
->rel_plt());
6101 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
6102 this->rela_dyn_
, true, size
== 32);
6106 if (this->got_
!= NULL
)
6108 this->got_
->finalize_data_size();
6109 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
6110 this->got_
, this->got_
->g_o_t());
6115 if (this->glink_
!= NULL
)
6117 this->glink_
->finalize_data_size();
6118 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
6120 (this->glink_
->pltresolve_size
6126 // Emit any relocs we saved in an attempt to avoid generating COPY
6128 if (this->copy_relocs_
.any_saved_relocs())
6129 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
6132 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6136 ok_lo_toc_insn(uint32_t insn
)
6138 return ((insn
& (0x3f << 26)) == 14u << 26 /* addi */
6139 || (insn
& (0x3f << 26)) == 32u << 26 /* lwz */
6140 || (insn
& (0x3f << 26)) == 34u << 26 /* lbz */
6141 || (insn
& (0x3f << 26)) == 36u << 26 /* stw */
6142 || (insn
& (0x3f << 26)) == 38u << 26 /* stb */
6143 || (insn
& (0x3f << 26)) == 40u << 26 /* lhz */
6144 || (insn
& (0x3f << 26)) == 42u << 26 /* lha */
6145 || (insn
& (0x3f << 26)) == 44u << 26 /* sth */
6146 || (insn
& (0x3f << 26)) == 46u << 26 /* lmw */
6147 || (insn
& (0x3f << 26)) == 47u << 26 /* stmw */
6148 || (insn
& (0x3f << 26)) == 48u << 26 /* lfs */
6149 || (insn
& (0x3f << 26)) == 50u << 26 /* lfd */
6150 || (insn
& (0x3f << 26)) == 52u << 26 /* stfs */
6151 || (insn
& (0x3f << 26)) == 54u << 26 /* stfd */
6152 || ((insn
& (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6154 || ((insn
& (0x3f << 26)) == 62u << 26 /* std, stmd */
6155 && ((insn
& 3) == 0 || (insn
& 3) == 3))
6156 || (insn
& (0x3f << 26)) == 12u << 26 /* addic */);
6159 // Return the value to use for a branch relocation.
6161 template<int size
, bool big_endian
>
6162 typename Target_powerpc
<size
, big_endian
>::Address
6163 Target_powerpc
<size
, big_endian
>::symval_for_branch(
6164 const Symbol_table
* symtab
,
6166 const Sized_symbol
<size
>* gsym
,
6167 Powerpc_relobj
<size
, big_endian
>* object
,
6168 unsigned int *dest_shndx
)
6174 // If the symbol is defined in an opd section, ie. is a function
6175 // descriptor, use the function descriptor code entry address
6176 Powerpc_relobj
<size
, big_endian
>* symobj
= object
;
6178 && gsym
->source() != Symbol::FROM_OBJECT
)
6181 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
6182 unsigned int shndx
= symobj
->opd_shndx();
6185 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
6186 gold_assert(opd_addr
!= invalid_address
);
6187 opd_addr
+= symobj
->output_section(shndx
)->address();
6188 if (value
>= opd_addr
&& value
< opd_addr
+ symobj
->section_size(shndx
))
6191 *dest_shndx
= symobj
->get_opd_ent(value
- opd_addr
, &sec_off
);
6192 if (symtab
->is_section_folded(symobj
, *dest_shndx
))
6195 = symtab
->icf()->get_folded_section(symobj
, *dest_shndx
);
6196 symobj
= static_cast<Powerpc_relobj
<size
, big_endian
>*>(folded
.first
);
6197 *dest_shndx
= folded
.second
;
6199 Address sec_addr
= symobj
->get_output_section_offset(*dest_shndx
);
6200 gold_assert(sec_addr
!= invalid_address
);
6201 sec_addr
+= symobj
->output_section(*dest_shndx
)->address();
6202 value
= sec_addr
+ sec_off
;
6207 // Perform a relocation.
6209 template<int size
, bool big_endian
>
6211 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
6212 const Relocate_info
<size
, big_endian
>* relinfo
,
6213 Target_powerpc
* target
,
6216 const elfcpp::Rela
<size
, big_endian
>& rela
,
6217 unsigned int r_type
,
6218 const Sized_symbol
<size
>* gsym
,
6219 const Symbol_value
<size
>* psymval
,
6220 unsigned char* view
,
6222 section_size_type view_size
)
6227 switch (this->maybe_skip_tls_get_addr_call(r_type
, gsym
))
6229 case Track_tls::NOT_EXPECTED
:
6230 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6231 _("__tls_get_addr call lacks marker reloc"));
6233 case Track_tls::EXPECTED
:
6234 // We have already complained.
6236 case Track_tls::SKIP
:
6238 case Track_tls::NORMAL
:
6242 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
6243 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
6244 Powerpc_relobj
<size
, big_endian
>* const object
6245 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
6247 bool has_plt_value
= false;
6248 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6250 ? use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
))
6251 : object
->local_has_plt_offset(r_sym
))
6252 && (!psymval
->is_ifunc_symbol()
6253 || Scan::reloc_needs_plt_for_ifunc(object
, r_type
, false)))
6255 Stub_table
<size
, big_endian
>* stub_table
6256 = object
->stub_table(relinfo
->data_shndx
);
6257 if (stub_table
== NULL
)
6259 // This is a ref from a data section to an ifunc symbol.
6260 if (target
->stub_tables().size() != 0)
6261 stub_table
= target
->stub_tables()[0];
6263 gold_assert(stub_table
!= NULL
);
6266 off
= stub_table
->find_plt_call_entry(object
, gsym
, r_type
,
6267 rela
.get_r_addend());
6269 off
= stub_table
->find_plt_call_entry(object
, r_sym
, r_type
,
6270 rela
.get_r_addend());
6271 gold_assert(off
!= invalid_address
);
6272 value
= stub_table
->stub_address() + off
;
6273 has_plt_value
= true;
6276 if (r_type
== elfcpp::R_POWERPC_GOT16
6277 || r_type
== elfcpp::R_POWERPC_GOT16_LO
6278 || r_type
== elfcpp::R_POWERPC_GOT16_HI
6279 || r_type
== elfcpp::R_POWERPC_GOT16_HA
6280 || r_type
== elfcpp::R_PPC64_GOT16_DS
6281 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
6285 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
6286 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
6290 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6291 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
6292 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
6294 value
-= target
->got_section()->got_base_offset(object
);
6296 else if (r_type
== elfcpp::R_PPC64_TOC
)
6298 value
= (target
->got_section()->output_section()->address()
6299 + object
->toc_base_offset());
6301 else if (gsym
!= NULL
6302 && (r_type
== elfcpp::R_POWERPC_REL24
6303 || r_type
== elfcpp::R_PPC_PLTREL24
)
6308 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
6309 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
6310 bool can_plt_call
= false;
6311 if (rela
.get_r_offset() + 8 <= view_size
)
6313 Valtype insn
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
6314 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
6317 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
))
6319 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
6320 can_plt_call
= true;
6325 // If we don't have a branch and link followed by a nop,
6326 // we can't go via the plt because there is no place to
6327 // put a toc restoring instruction.
6328 // Unless we know we won't be returning.
6329 if (strcmp(gsym
->name(), "__libc_start_main") == 0)
6330 can_plt_call
= true;
6334 // This is not an error in one special case: A self
6335 // call. It isn't possible to cheaply verify we have
6336 // such a call so just check for a call to the same
6339 Address code
= value
;
6340 if (gsym
->source() == Symbol::FROM_OBJECT
6341 && gsym
->object() == object
)
6343 Address addend
= rela
.get_r_addend();
6344 unsigned int dest_shndx
;
6345 Address opdent
= psymval
->value(object
, addend
);
6346 code
= target
->symval_for_branch(relinfo
->symtab
, opdent
,
6347 gsym
, object
, &dest_shndx
);
6349 if (dest_shndx
== 0)
6350 dest_shndx
= gsym
->shndx(&is_ordinary
);
6351 ok
= dest_shndx
== relinfo
->data_shndx
;
6355 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6356 _("call lacks nop, can't restore toc; "
6357 "recompile with -fPIC"));
6363 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6364 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
6365 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
6366 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
6368 // First instruction of a global dynamic sequence, arg setup insn.
6369 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6370 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6371 enum Got_type got_type
= GOT_TYPE_STANDARD
;
6372 if (tls_type
== tls::TLSOPT_NONE
)
6373 got_type
= GOT_TYPE_TLSGD
;
6374 else if (tls_type
== tls::TLSOPT_TO_IE
)
6375 got_type
= GOT_TYPE_TPREL
;
6376 if (got_type
!= GOT_TYPE_STANDARD
)
6380 gold_assert(gsym
->has_got_offset(got_type
));
6381 value
= gsym
->got_offset(got_type
);
6385 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6386 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
6387 value
= object
->local_got_offset(r_sym
, got_type
);
6389 value
-= target
->got_section()->got_base_offset(object
);
6391 if (tls_type
== tls::TLSOPT_TO_IE
)
6393 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6394 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6396 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6397 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6398 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
6400 insn
|= 32 << 26; // lwz
6402 insn
|= 58 << 26; // ld
6403 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6405 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
6406 - elfcpp::R_POWERPC_GOT_TLSGD16
);
6408 else if (tls_type
== tls::TLSOPT_TO_LE
)
6410 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
6411 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
6413 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6414 Insn insn
= addis_3_13
;
6417 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6418 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6419 value
= psymval
->value(object
, rela
.get_r_addend());
6423 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6425 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6426 r_type
= elfcpp::R_POWERPC_NONE
;
6430 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6431 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
6432 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
6433 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
6435 // First instruction of a local dynamic sequence, arg setup insn.
6436 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6437 if (tls_type
== tls::TLSOPT_NONE
)
6439 value
= target
->tlsld_got_offset();
6440 value
-= target
->got_section()->got_base_offset(object
);
6444 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6445 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
6446 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
6448 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6449 Insn insn
= addis_3_13
;
6452 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6453 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6458 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6460 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6461 r_type
= elfcpp::R_POWERPC_NONE
;
6465 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
6466 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
6467 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
6468 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
6470 // Accesses relative to a local dynamic sequence address,
6471 // no optimisation here.
6474 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
6475 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
6479 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6480 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
6481 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
6483 value
-= target
->got_section()->got_base_offset(object
);
6485 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6486 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
6487 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
6488 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
6490 // First instruction of initial exec sequence.
6491 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6492 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6493 if (tls_type
== tls::TLSOPT_NONE
)
6497 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
6498 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
6502 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
6503 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
6504 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
6506 value
-= target
->got_section()->got_base_offset(object
);
6510 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
6511 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
6512 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
6514 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6515 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6516 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
6521 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6522 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
6523 value
= psymval
->value(object
, rela
.get_r_addend());
6527 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6529 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6530 r_type
= elfcpp::R_POWERPC_NONE
;
6534 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
6535 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
6537 // Second instruction of a global dynamic sequence,
6538 // the __tls_get_addr call
6539 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6540 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6541 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
6542 if (tls_type
!= tls::TLSOPT_NONE
)
6544 if (tls_type
== tls::TLSOPT_TO_IE
)
6546 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6547 Insn insn
= add_3_3_13
;
6550 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6551 r_type
= elfcpp::R_POWERPC_NONE
;
6555 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6556 Insn insn
= addi_3_3
;
6557 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6558 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6559 view
+= 2 * big_endian
;
6560 value
= psymval
->value(object
, rela
.get_r_addend());
6562 this->skip_next_tls_get_addr_call();
6565 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
6566 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
6568 // Second instruction of a local dynamic sequence,
6569 // the __tls_get_addr call
6570 this->expect_tls_get_addr_call(relinfo
, relnum
, rela
.get_r_offset());
6571 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
6572 if (tls_type
== tls::TLSOPT_TO_LE
)
6574 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6575 Insn insn
= addi_3_3
;
6576 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6577 this->skip_next_tls_get_addr_call();
6578 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6579 view
+= 2 * big_endian
;
6583 else if (r_type
== elfcpp::R_POWERPC_TLS
)
6585 // Second instruction of an initial exec sequence
6586 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
6587 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
6588 if (tls_type
== tls::TLSOPT_TO_LE
)
6590 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6591 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6592 unsigned int reg
= size
== 32 ? 2 : 13;
6593 insn
= at_tls_transform(insn
, reg
);
6594 gold_assert(insn
!= 0);
6595 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6596 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
6597 view
+= 2 * big_endian
;
6598 value
= psymval
->value(object
, rela
.get_r_addend());
6601 else if (!has_plt_value
)
6604 unsigned int dest_shndx
;
6605 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
6606 addend
= rela
.get_r_addend();
6607 value
= psymval
->value(object
, addend
);
6608 if (size
== 64 && is_branch_reloc(r_type
))
6609 value
= target
->symval_for_branch(relinfo
->symtab
, value
,
6610 gsym
, object
, &dest_shndx
);
6611 unsigned int max_branch_offset
= 0;
6612 if (r_type
== elfcpp::R_POWERPC_REL24
6613 || r_type
== elfcpp::R_PPC_PLTREL24
6614 || r_type
== elfcpp::R_PPC_LOCAL24PC
)
6615 max_branch_offset
= 1 << 25;
6616 else if (r_type
== elfcpp::R_POWERPC_REL14
6617 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
6618 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
)
6619 max_branch_offset
= 1 << 15;
6620 if (max_branch_offset
!= 0
6621 && value
- address
+ max_branch_offset
>= 2 * max_branch_offset
)
6623 Stub_table
<size
, big_endian
>* stub_table
6624 = object
->stub_table(relinfo
->data_shndx
);
6625 if (stub_table
!= NULL
)
6627 Address off
= stub_table
->find_long_branch_entry(object
, value
);
6628 if (off
!= invalid_address
)
6629 value
= (stub_table
->stub_address() + stub_table
->plt_size()
6637 case elfcpp::R_PPC64_REL64
:
6638 case elfcpp::R_POWERPC_REL32
:
6639 case elfcpp::R_POWERPC_REL24
:
6640 case elfcpp::R_PPC_PLTREL24
:
6641 case elfcpp::R_PPC_LOCAL24PC
:
6642 case elfcpp::R_POWERPC_REL16
:
6643 case elfcpp::R_POWERPC_REL16_LO
:
6644 case elfcpp::R_POWERPC_REL16_HI
:
6645 case elfcpp::R_POWERPC_REL16_HA
:
6646 case elfcpp::R_POWERPC_REL14
:
6647 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6648 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6652 case elfcpp::R_PPC64_TOC16
:
6653 case elfcpp::R_PPC64_TOC16_LO
:
6654 case elfcpp::R_PPC64_TOC16_HI
:
6655 case elfcpp::R_PPC64_TOC16_HA
:
6656 case elfcpp::R_PPC64_TOC16_DS
:
6657 case elfcpp::R_PPC64_TOC16_LO_DS
:
6658 // Subtract the TOC base address.
6659 value
-= (target
->got_section()->output_section()->address()
6660 + object
->toc_base_offset());
6663 case elfcpp::R_POWERPC_SECTOFF
:
6664 case elfcpp::R_POWERPC_SECTOFF_LO
:
6665 case elfcpp::R_POWERPC_SECTOFF_HI
:
6666 case elfcpp::R_POWERPC_SECTOFF_HA
:
6667 case elfcpp::R_PPC64_SECTOFF_DS
:
6668 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
6670 value
-= os
->address();
6673 case elfcpp::R_PPC64_TPREL16_DS
:
6674 case elfcpp::R_PPC64_TPREL16_LO_DS
:
6676 // R_PPC_TLSGD and R_PPC_TLSLD
6678 case elfcpp::R_POWERPC_TPREL16
:
6679 case elfcpp::R_POWERPC_TPREL16_LO
:
6680 case elfcpp::R_POWERPC_TPREL16_HI
:
6681 case elfcpp::R_POWERPC_TPREL16_HA
:
6682 case elfcpp::R_POWERPC_TPREL
:
6683 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6684 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6685 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
6686 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
6687 // tls symbol values are relative to tls_segment()->vaddr()
6691 case elfcpp::R_PPC64_DTPREL16_DS
:
6692 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
6693 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6694 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6695 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6696 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
6698 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6699 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6701 case elfcpp::R_POWERPC_DTPREL16
:
6702 case elfcpp::R_POWERPC_DTPREL16_LO
:
6703 case elfcpp::R_POWERPC_DTPREL16_HI
:
6704 case elfcpp::R_POWERPC_DTPREL16_HA
:
6705 case elfcpp::R_POWERPC_DTPREL
:
6706 // tls symbol values are relative to tls_segment()->vaddr()
6707 value
-= dtp_offset
;
6714 Insn branch_bit
= 0;
6717 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6718 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6719 branch_bit
= 1 << 21;
6720 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6721 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6723 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
6724 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6727 if (this->is_isa_v2
)
6729 // Set 'a' bit. This is 0b00010 in BO field for branch
6730 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6731 // for branch on CTR insns (BO == 1a00t or 1a01t).
6732 if ((insn
& (0x14 << 21)) == (0x04 << 21))
6734 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
6741 // Invert 'y' bit if not the default.
6742 if (static_cast<Signed_address
>(value
) < 0)
6745 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6755 // Multi-instruction sequences that access the TOC can be
6756 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6757 // to nop; addi rb,r2,x;
6763 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6764 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6765 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6766 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6767 case elfcpp::R_POWERPC_GOT16_HA
:
6768 case elfcpp::R_PPC64_TOC16_HA
:
6769 if (parameters
->options().toc_optimize())
6771 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6772 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6773 if ((insn
& ((0x3f << 26) | 0x1f << 16))
6774 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6775 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6776 _("toc optimization is not supported "
6777 "for %#08x instruction"), insn
);
6778 else if (value
+ 0x8000 < 0x10000)
6780 elfcpp::Swap
<32, big_endian
>::writeval(iview
, nop
);
6786 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6787 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6788 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6789 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6790 case elfcpp::R_POWERPC_GOT16_LO
:
6791 case elfcpp::R_PPC64_GOT16_LO_DS
:
6792 case elfcpp::R_PPC64_TOC16_LO
:
6793 case elfcpp::R_PPC64_TOC16_LO_DS
:
6794 if (parameters
->options().toc_optimize())
6796 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
6797 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
6798 if (!ok_lo_toc_insn(insn
))
6799 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
6800 _("toc optimization is not supported "
6801 "for %#08x instruction"), insn
);
6802 else if (value
+ 0x8000 < 0x10000)
6804 if ((insn
& (0x3f << 26)) == 12u << 26 /* addic */)
6806 // Transform addic to addi when we change reg.
6807 insn
&= ~((0x3f << 26) | (0x1f << 16));
6808 insn
|= (14u << 26) | (2 << 16);
6812 insn
&= ~(0x1f << 16);
6815 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
6822 typename
Reloc::Overflow_check overflow
= Reloc::CHECK_NONE
;
6825 case elfcpp::R_POWERPC_ADDR32
:
6826 case elfcpp::R_POWERPC_UADDR32
:
6828 overflow
= Reloc::CHECK_BITFIELD
;
6831 case elfcpp::R_POWERPC_REL32
:
6833 overflow
= Reloc::CHECK_SIGNED
;
6836 case elfcpp::R_POWERPC_ADDR24
:
6837 case elfcpp::R_POWERPC_ADDR16
:
6838 case elfcpp::R_POWERPC_UADDR16
:
6839 case elfcpp::R_PPC64_ADDR16_DS
:
6840 case elfcpp::R_POWERPC_ADDR14
:
6841 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
6842 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
6843 overflow
= Reloc::CHECK_BITFIELD
;
6846 case elfcpp::R_POWERPC_REL24
:
6847 case elfcpp::R_PPC_PLTREL24
:
6848 case elfcpp::R_PPC_LOCAL24PC
:
6849 case elfcpp::R_POWERPC_REL16
:
6850 case elfcpp::R_PPC64_TOC16
:
6851 case elfcpp::R_POWERPC_GOT16
:
6852 case elfcpp::R_POWERPC_SECTOFF
:
6853 case elfcpp::R_POWERPC_TPREL16
:
6854 case elfcpp::R_POWERPC_DTPREL16
:
6855 case elfcpp::R_PPC64_TPREL16_DS
:
6856 case elfcpp::R_PPC64_DTPREL16_DS
:
6857 case elfcpp::R_PPC64_TOC16_DS
:
6858 case elfcpp::R_PPC64_GOT16_DS
:
6859 case elfcpp::R_PPC64_SECTOFF_DS
:
6860 case elfcpp::R_POWERPC_REL14
:
6861 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
6862 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
6863 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6864 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6865 case elfcpp::R_POWERPC_GOT_TPREL16
:
6866 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6867 overflow
= Reloc::CHECK_SIGNED
;
6871 typename Powerpc_relocate_functions
<size
, big_endian
>::Status status
6872 = Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
;
6875 case elfcpp::R_POWERPC_NONE
:
6876 case elfcpp::R_POWERPC_TLS
:
6877 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
6878 case elfcpp::R_POWERPC_GNU_VTENTRY
:
6879 case elfcpp::R_PPC_EMB_MRKREF
:
6882 case elfcpp::R_PPC64_ADDR64
:
6883 case elfcpp::R_PPC64_REL64
:
6884 case elfcpp::R_PPC64_TOC
:
6885 Reloc::addr64(view
, value
);
6888 case elfcpp::R_POWERPC_TPREL
:
6889 case elfcpp::R_POWERPC_DTPREL
:
6891 Reloc::addr64(view
, value
);
6893 status
= Reloc::addr32(view
, value
, overflow
);
6896 case elfcpp::R_PPC64_UADDR64
:
6897 Reloc::addr64_u(view
, value
);
6900 case elfcpp::R_POWERPC_ADDR32
:
6901 status
= Reloc::addr32(view
, value
, overflow
);
6904 case elfcpp::R_POWERPC_REL32
:
6905 case elfcpp::R_POWERPC_UADDR32
:
6906 status
= Reloc::addr32_u(view
, value
, overflow
);
6909 case elfcpp::R_POWERPC_ADDR24
:
6910 case elfcpp::R_POWERPC_REL24
:
6911 case elfcpp::R_PPC_PLTREL24
:
6912 case elfcpp::R_PPC_LOCAL24PC
:
6913 status
= Reloc::addr24(view
, value
, overflow
);
6916 case elfcpp::R_POWERPC_GOT_DTPREL16
:
6917 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
6920 status
= Reloc::addr16_ds(view
, value
, overflow
);
6923 case elfcpp::R_POWERPC_ADDR16
:
6924 case elfcpp::R_POWERPC_REL16
:
6925 case elfcpp::R_PPC64_TOC16
:
6926 case elfcpp::R_POWERPC_GOT16
:
6927 case elfcpp::R_POWERPC_SECTOFF
:
6928 case elfcpp::R_POWERPC_TPREL16
:
6929 case elfcpp::R_POWERPC_DTPREL16
:
6930 case elfcpp::R_POWERPC_GOT_TLSGD16
:
6931 case elfcpp::R_POWERPC_GOT_TLSLD16
:
6932 case elfcpp::R_POWERPC_GOT_TPREL16
:
6933 case elfcpp::R_POWERPC_ADDR16_LO
:
6934 case elfcpp::R_POWERPC_REL16_LO
:
6935 case elfcpp::R_PPC64_TOC16_LO
:
6936 case elfcpp::R_POWERPC_GOT16_LO
:
6937 case elfcpp::R_POWERPC_SECTOFF_LO
:
6938 case elfcpp::R_POWERPC_TPREL16_LO
:
6939 case elfcpp::R_POWERPC_DTPREL16_LO
:
6940 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
6941 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
6942 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
6943 status
= Reloc::addr16(view
, value
, overflow
);
6946 case elfcpp::R_POWERPC_UADDR16
:
6947 status
= Reloc::addr16_u(view
, value
, overflow
);
6950 case elfcpp::R_POWERPC_ADDR16_HI
:
6951 case elfcpp::R_POWERPC_REL16_HI
:
6952 case elfcpp::R_PPC64_TOC16_HI
:
6953 case elfcpp::R_POWERPC_GOT16_HI
:
6954 case elfcpp::R_POWERPC_SECTOFF_HI
:
6955 case elfcpp::R_POWERPC_TPREL16_HI
:
6956 case elfcpp::R_POWERPC_DTPREL16_HI
:
6957 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
6958 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
6959 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
6960 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
6961 Reloc::addr16_hi(view
, value
);
6964 case elfcpp::R_POWERPC_ADDR16_HA
:
6965 case elfcpp::R_POWERPC_REL16_HA
:
6966 case elfcpp::R_PPC64_TOC16_HA
:
6967 case elfcpp::R_POWERPC_GOT16_HA
:
6968 case elfcpp::R_POWERPC_SECTOFF_HA
:
6969 case elfcpp::R_POWERPC_TPREL16_HA
:
6970 case elfcpp::R_POWERPC_DTPREL16_HA
:
6971 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
6972 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
6973 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
6974 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
6975 Reloc::addr16_ha(view
, value
);
6978 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
6980 // R_PPC_EMB_NADDR16_LO
6982 case elfcpp::R_PPC64_ADDR16_HIGHER
:
6983 case elfcpp::R_PPC64_TPREL16_HIGHER
:
6984 Reloc::addr16_hi2(view
, value
);
6987 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
6989 // R_PPC_EMB_NADDR16_HI
6991 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
6992 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
6993 Reloc::addr16_ha2(view
, value
);
6996 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
6998 // R_PPC_EMB_NADDR16_HA
7000 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
7001 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
7002 Reloc::addr16_hi3(view
, value
);
7005 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
7009 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
7010 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
7011 Reloc::addr16_ha3(view
, value
);
7014 case elfcpp::R_PPC64_DTPREL16_DS
:
7015 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
7017 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
7019 case elfcpp::R_PPC64_TPREL16_DS
:
7020 case elfcpp::R_PPC64_TPREL16_LO_DS
:
7022 // R_PPC_TLSGD, R_PPC_TLSLD
7024 case elfcpp::R_PPC64_ADDR16_DS
:
7025 case elfcpp::R_PPC64_ADDR16_LO_DS
:
7026 case elfcpp::R_PPC64_TOC16_DS
:
7027 case elfcpp::R_PPC64_TOC16_LO_DS
:
7028 case elfcpp::R_PPC64_GOT16_DS
:
7029 case elfcpp::R_PPC64_GOT16_LO_DS
:
7030 case elfcpp::R_PPC64_SECTOFF_DS
:
7031 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
7032 status
= Reloc::addr16_ds(view
, value
, overflow
);
7035 case elfcpp::R_POWERPC_ADDR14
:
7036 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
7037 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
7038 case elfcpp::R_POWERPC_REL14
:
7039 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
7040 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
7041 status
= Reloc::addr14(view
, value
, overflow
);
7044 case elfcpp::R_POWERPC_COPY
:
7045 case elfcpp::R_POWERPC_GLOB_DAT
:
7046 case elfcpp::R_POWERPC_JMP_SLOT
:
7047 case elfcpp::R_POWERPC_RELATIVE
:
7048 case elfcpp::R_POWERPC_DTPMOD
:
7049 case elfcpp::R_PPC64_JMP_IREL
:
7050 case elfcpp::R_POWERPC_IRELATIVE
:
7051 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7052 _("unexpected reloc %u in object file"),
7056 case elfcpp::R_PPC_EMB_SDA21
:
7061 // R_PPC64_TOCSAVE. For the time being this can be ignored.
7065 case elfcpp::R_PPC_EMB_SDA2I16
:
7066 case elfcpp::R_PPC_EMB_SDA2REL
:
7069 // R_PPC64_TLSGD, R_PPC64_TLSLD
7072 case elfcpp::R_POWERPC_PLT32
:
7073 case elfcpp::R_POWERPC_PLTREL32
:
7074 case elfcpp::R_POWERPC_PLT16_LO
:
7075 case elfcpp::R_POWERPC_PLT16_HI
:
7076 case elfcpp::R_POWERPC_PLT16_HA
:
7077 case elfcpp::R_PPC_SDAREL16
:
7078 case elfcpp::R_POWERPC_ADDR30
:
7079 case elfcpp::R_PPC64_PLT64
:
7080 case elfcpp::R_PPC64_PLTREL64
:
7081 case elfcpp::R_PPC64_PLTGOT16
:
7082 case elfcpp::R_PPC64_PLTGOT16_LO
:
7083 case elfcpp::R_PPC64_PLTGOT16_HI
:
7084 case elfcpp::R_PPC64_PLTGOT16_HA
:
7085 case elfcpp::R_PPC64_PLT16_LO_DS
:
7086 case elfcpp::R_PPC64_PLTGOT16_DS
:
7087 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
7088 case elfcpp::R_PPC_EMB_RELSEC16
:
7089 case elfcpp::R_PPC_EMB_RELST_LO
:
7090 case elfcpp::R_PPC_EMB_RELST_HI
:
7091 case elfcpp::R_PPC_EMB_RELST_HA
:
7092 case elfcpp::R_PPC_EMB_BIT_FLD
:
7093 case elfcpp::R_PPC_EMB_RELSDA
:
7094 case elfcpp::R_PPC_TOC16
:
7097 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7098 _("unsupported reloc %u"),
7102 if (status
!= Powerpc_relocate_functions
<size
, big_endian
>::STATUS_OK
)
7103 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
7104 _("relocation overflow"));
7109 // Relocate section data.
7111 template<int size
, bool big_endian
>
7113 Target_powerpc
<size
, big_endian
>::relocate_section(
7114 const Relocate_info
<size
, big_endian
>* relinfo
,
7115 unsigned int sh_type
,
7116 const unsigned char* prelocs
,
7118 Output_section
* output_section
,
7119 bool needs_special_offset_handling
,
7120 unsigned char* view
,
7122 section_size_type view_size
,
7123 const Reloc_symbol_changes
* reloc_symbol_changes
)
7125 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
7126 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
7127 typedef typename Target_powerpc
<size
, big_endian
>::Relocate_comdat_behavior
7128 Powerpc_comdat_behavior
;
7130 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7132 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
7133 Powerpc_relocate
, Powerpc_comdat_behavior
>(
7139 needs_special_offset_handling
,
7143 reloc_symbol_changes
);
7146 class Powerpc_scan_relocatable_reloc
7149 // Return the strategy to use for a local symbol which is not a
7150 // section symbol, given the relocation type.
7151 inline Relocatable_relocs::Reloc_strategy
7152 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
7154 if (r_type
== 0 && r_sym
== 0)
7155 return Relocatable_relocs::RELOC_DISCARD
;
7156 return Relocatable_relocs::RELOC_COPY
;
7159 // Return the strategy to use for a local symbol which is a section
7160 // symbol, given the relocation type.
7161 inline Relocatable_relocs::Reloc_strategy
7162 local_section_strategy(unsigned int, Relobj
*)
7164 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
7167 // Return the strategy to use for a global symbol, given the
7168 // relocation type, the object, and the symbol index.
7169 inline Relocatable_relocs::Reloc_strategy
7170 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
7172 if (r_type
== elfcpp::R_PPC_PLTREL24
)
7173 return Relocatable_relocs::RELOC_SPECIAL
;
7174 return Relocatable_relocs::RELOC_COPY
;
7178 // Scan the relocs during a relocatable link.
7180 template<int size
, bool big_endian
>
7182 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
7183 Symbol_table
* symtab
,
7185 Sized_relobj_file
<size
, big_endian
>* object
,
7186 unsigned int data_shndx
,
7187 unsigned int sh_type
,
7188 const unsigned char* prelocs
,
7190 Output_section
* output_section
,
7191 bool needs_special_offset_handling
,
7192 size_t local_symbol_count
,
7193 const unsigned char* plocal_symbols
,
7194 Relocatable_relocs
* rr
)
7196 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7198 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
7199 Powerpc_scan_relocatable_reloc
>(
7207 needs_special_offset_handling
,
7213 // Emit relocations for a section.
7214 // This is a modified version of the function by the same name in
7215 // target-reloc.h. Using relocate_special_relocatable for
7216 // R_PPC_PLTREL24 would require duplication of the entire body of the
7217 // loop, so we may as well duplicate the whole thing.
7219 template<int size
, bool big_endian
>
7221 Target_powerpc
<size
, big_endian
>::relocate_relocs(
7222 const Relocate_info
<size
, big_endian
>* relinfo
,
7223 unsigned int sh_type
,
7224 const unsigned char* prelocs
,
7226 Output_section
* output_section
,
7227 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
7228 const Relocatable_relocs
* rr
,
7230 Address view_address
,
7232 unsigned char* reloc_view
,
7233 section_size_type reloc_view_size
)
7235 gold_assert(sh_type
== elfcpp::SHT_RELA
);
7237 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
7239 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
7241 const int reloc_size
7242 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
7244 Powerpc_relobj
<size
, big_endian
>* const object
7245 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
7246 const unsigned int local_count
= object
->local_symbol_count();
7247 unsigned int got2_shndx
= object
->got2_shndx();
7248 Address got2_addend
= 0;
7249 if (got2_shndx
!= 0)
7251 got2_addend
= object
->get_output_section_offset(got2_shndx
);
7252 gold_assert(got2_addend
!= invalid_address
);
7255 unsigned char* pwrite
= reloc_view
;
7256 bool zap_next
= false;
7257 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
7259 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
7260 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
7263 Reltype
reloc(prelocs
);
7264 Reltype_write
reloc_write(pwrite
);
7266 Address offset
= reloc
.get_r_offset();
7267 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
7268 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
7269 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
7270 const unsigned int orig_r_sym
= r_sym
;
7271 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
7272 = reloc
.get_r_addend();
7273 const Symbol
* gsym
= NULL
;
7277 // We could arrange to discard these and other relocs for
7278 // tls optimised sequences in the strategy methods, but for
7279 // now do as BFD ld does.
7280 r_type
= elfcpp::R_POWERPC_NONE
;
7284 // Get the new symbol index.
7285 if (r_sym
< local_count
)
7289 case Relocatable_relocs::RELOC_COPY
:
7290 case Relocatable_relocs::RELOC_SPECIAL
:
7293 r_sym
= object
->symtab_index(r_sym
);
7294 gold_assert(r_sym
!= -1U);
7298 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
7300 // We are adjusting a section symbol. We need to find
7301 // the symbol table index of the section symbol for
7302 // the output section corresponding to input section
7303 // in which this symbol is defined.
7304 gold_assert(r_sym
< local_count
);
7306 unsigned int shndx
=
7307 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
7308 gold_assert(is_ordinary
);
7309 Output_section
* os
= object
->output_section(shndx
);
7310 gold_assert(os
!= NULL
);
7311 gold_assert(os
->needs_symtab_index());
7312 r_sym
= os
->symtab_index();
7322 gsym
= object
->global_symbol(r_sym
);
7323 gold_assert(gsym
!= NULL
);
7324 if (gsym
->is_forwarder())
7325 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
7327 gold_assert(gsym
->has_symtab_index());
7328 r_sym
= gsym
->symtab_index();
7331 // Get the new offset--the location in the output section where
7332 // this relocation should be applied.
7333 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7334 offset
+= offset_in_output_section
;
7337 section_offset_type sot_offset
=
7338 convert_types
<section_offset_type
, Address
>(offset
);
7339 section_offset_type new_sot_offset
=
7340 output_section
->output_offset(object
, relinfo
->data_shndx
,
7342 gold_assert(new_sot_offset
!= -1);
7343 offset
= new_sot_offset
;
7346 // In an object file, r_offset is an offset within the section.
7347 // In an executable or dynamic object, generated by
7348 // --emit-relocs, r_offset is an absolute address.
7349 if (!parameters
->options().relocatable())
7351 offset
+= view_address
;
7352 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
7353 offset
-= offset_in_output_section
;
7356 // Handle the reloc addend based on the strategy.
7357 if (strategy
== Relocatable_relocs::RELOC_COPY
)
7359 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
7361 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
7362 addend
= psymval
->value(object
, addend
);
7364 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
7366 if (addend
>= 32768)
7367 addend
+= got2_addend
;
7372 if (!parameters
->options().relocatable())
7374 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7375 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
7376 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
7377 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
7379 // First instruction of a global dynamic sequence,
7381 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7382 switch (this->optimize_tls_gd(final
))
7384 case tls::TLSOPT_TO_IE
:
7385 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
7386 - elfcpp::R_POWERPC_GOT_TLSGD16
);
7388 case tls::TLSOPT_TO_LE
:
7389 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
7390 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
7391 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7394 r_type
= elfcpp::R_POWERPC_NONE
;
7395 offset
-= 2 * big_endian
;
7402 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7403 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
7404 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
7405 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
7407 // First instruction of a local dynamic sequence,
7409 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7411 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
7412 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
7414 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7415 const Output_section
* os
= relinfo
->layout
->tls_segment()
7417 gold_assert(os
!= NULL
);
7418 gold_assert(os
->needs_symtab_index());
7419 r_sym
= os
->symtab_index();
7420 addend
= dtp_offset
;
7424 r_type
= elfcpp::R_POWERPC_NONE
;
7425 offset
-= 2 * big_endian
;
7429 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7430 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
7431 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
7432 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
7434 // First instruction of initial exec sequence.
7435 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7436 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7438 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
7439 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
7440 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
7443 r_type
= elfcpp::R_POWERPC_NONE
;
7444 offset
-= 2 * big_endian
;
7448 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
7449 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
7451 // Second instruction of a global dynamic sequence,
7452 // the __tls_get_addr call
7453 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7454 switch (this->optimize_tls_gd(final
))
7456 case tls::TLSOPT_TO_IE
:
7457 r_type
= elfcpp::R_POWERPC_NONE
;
7460 case tls::TLSOPT_TO_LE
:
7461 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7462 offset
+= 2 * big_endian
;
7469 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
7470 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
7472 // Second instruction of a local dynamic sequence,
7473 // the __tls_get_addr call
7474 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
7476 const Output_section
* os
= relinfo
->layout
->tls_segment()
7478 gold_assert(os
!= NULL
);
7479 gold_assert(os
->needs_symtab_index());
7480 r_sym
= os
->symtab_index();
7481 addend
= dtp_offset
;
7482 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7483 offset
+= 2 * big_endian
;
7487 else if (r_type
== elfcpp::R_POWERPC_TLS
)
7489 // Second instruction of an initial exec sequence
7490 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
7491 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
7493 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
7494 offset
+= 2 * big_endian
;
7499 reloc_write
.put_r_offset(offset
);
7500 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
7501 reloc_write
.put_r_addend(addend
);
7503 pwrite
+= reloc_size
;
7506 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
7507 == reloc_view_size
);
7510 // Return the value to use for a dynamic symbol which requires special
7511 // treatment. This is how we support equality comparisons of function
7512 // pointers across shared library boundaries, as described in the
7513 // processor specific ABI supplement.
7515 template<int size
, bool big_endian
>
7517 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
7521 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
7522 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7523 p
!= this->stub_tables_
.end();
7526 Address off
= (*p
)->find_plt_call_entry(gsym
);
7527 if (off
!= invalid_address
)
7528 return (*p
)->stub_address() + off
;
7534 // Return the PLT address to use for a local symbol.
7535 template<int size
, bool big_endian
>
7537 Target_powerpc
<size
, big_endian
>::do_plt_address_for_local(
7538 const Relobj
* object
,
7539 unsigned int symndx
) const
7543 const Sized_relobj
<size
, big_endian
>* relobj
7544 = static_cast<const Sized_relobj
<size
, big_endian
>*>(object
);
7545 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7546 p
!= this->stub_tables_
.end();
7549 Address off
= (*p
)->find_plt_call_entry(relobj
->sized_relobj(),
7551 if (off
!= invalid_address
)
7552 return (*p
)->stub_address() + off
;
7558 // Return the PLT address to use for a global symbol.
7559 template<int size
, bool big_endian
>
7561 Target_powerpc
<size
, big_endian
>::do_plt_address_for_global(
7562 const Symbol
* gsym
) const
7566 for (typename
Stub_tables::const_iterator p
= this->stub_tables_
.begin();
7567 p
!= this->stub_tables_
.end();
7570 Address off
= (*p
)->find_plt_call_entry(gsym
);
7571 if (off
!= invalid_address
)
7572 return (*p
)->stub_address() + off
;
7578 // Return the offset to use for the GOT_INDX'th got entry which is
7579 // for a local tls symbol specified by OBJECT, SYMNDX.
7580 template<int size
, bool big_endian
>
7582 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_local(
7583 const Relobj
* object
,
7584 unsigned int symndx
,
7585 unsigned int got_indx
) const
7587 const Powerpc_relobj
<size
, big_endian
>* ppc_object
7588 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(object
);
7589 if (ppc_object
->local_symbol(symndx
)->is_tls_symbol())
7591 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7592 got_type
<= GOT_TYPE_TPREL
;
7593 got_type
= Got_type(got_type
+ 1))
7594 if (ppc_object
->local_has_got_offset(symndx
, got_type
))
7596 unsigned int off
= ppc_object
->local_got_offset(symndx
, got_type
);
7597 if (got_type
== GOT_TYPE_TLSGD
)
7599 if (off
== got_indx
* (size
/ 8))
7601 if (got_type
== GOT_TYPE_TPREL
)
7611 // Return the offset to use for the GOT_INDX'th got entry which is
7612 // for global tls symbol GSYM.
7613 template<int size
, bool big_endian
>
7615 Target_powerpc
<size
, big_endian
>::do_tls_offset_for_global(
7617 unsigned int got_indx
) const
7619 if (gsym
->type() == elfcpp::STT_TLS
)
7621 for (Got_type got_type
= GOT_TYPE_TLSGD
;
7622 got_type
<= GOT_TYPE_TPREL
;
7623 got_type
= Got_type(got_type
+ 1))
7624 if (gsym
->has_got_offset(got_type
))
7626 unsigned int off
= gsym
->got_offset(got_type
);
7627 if (got_type
== GOT_TYPE_TLSGD
)
7629 if (off
== got_indx
* (size
/ 8))
7631 if (got_type
== GOT_TYPE_TPREL
)
7641 // The selector for powerpc object files.
7643 template<int size
, bool big_endian
>
7644 class Target_selector_powerpc
: public Target_selector
7647 Target_selector_powerpc()
7648 : Target_selector(size
== 64 ? elfcpp::EM_PPC64
: elfcpp::EM_PPC
,
7651 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
7652 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
7654 ? (big_endian
? "elf64ppc" : "elf64lppc")
7655 : (big_endian
? "elf32ppc" : "elf32lppc")))
7659 do_instantiate_target()
7660 { return new Target_powerpc
<size
, big_endian
>(); }
7663 Target_selector_powerpc
<32, true> target_selector_ppc32
;
7664 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
7665 Target_selector_powerpc
<64, true> target_selector_ppc64
;
7666 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
7668 // Instantiate these constants for -O0
7669 template<int size
, bool big_endian
>
7670 const int Output_data_glink
<size
, big_endian
>::pltresolve_size
;
7671 template<int size
, bool big_endian
>
7672 const typename Stub_table
<size
, big_endian
>::Address
7673 Stub_table
<size
, big_endian
>::invalid_address
;
7674 template<int size
, bool big_endian
>
7675 const typename Target_powerpc
<size
, big_endian
>::Address
7676 Target_powerpc
<size
, big_endian
>::invalid_address
;
7678 } // End anonymous namespace.