1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
27 #include "parameters.h"
34 #include "copy-relocs.h"
36 #include "target-reloc.h"
37 #include "target-select.h"
47 template<int size
, bool big_endian
>
48 class Output_data_plt_powerpc
;
50 template<int size
, bool big_endian
>
51 class Output_data_got_powerpc
;
53 template<int size
, bool big_endian
>
54 class Output_data_glink
;
56 template<int size
, bool big_endian
>
57 class Powerpc_relobj
: public Sized_relobj_file
<size
, big_endian
>
60 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
61 typedef typename
elfcpp::Elf_types
<size
>::Elf_Off Offset
;
63 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
64 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
65 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
66 special_(0), opd_ent_shndx_(), opd_ent_off_()
72 // The .got2 section shndx.
77 return this->special_
;
82 // The .opd section shndx.
89 return this->special_
;
92 // Init OPD entry arrays.
94 init_opd(size_t opd_size
)
96 size_t count
= this->opd_ent_ndx(opd_size
);
97 this->opd_ent_shndx_
.resize(count
);
98 this->opd_ent_off_
.reserve(count
);
101 // Return section and offset of function entry for .opd + R_OFF.
103 get_opd_ent(Address r_off
, unsigned int* shndx
, Address
* value
)
105 size_t ndx
= this->opd_ent_ndx(r_off
);
106 gold_assert(ndx
< this->opd_ent_shndx_
.size());
107 gold_assert(this->opd_ent_shndx_
[ndx
] != 0);
108 *shndx
= this->opd_ent_shndx_
[ndx
];
109 *value
= this->opd_ent_off_
[ndx
];
112 // Set section and offset of function entry for .opd + R_OFF.
114 set_opd_ent(Address r_off
, unsigned int shndx
, Address value
)
116 size_t ndx
= this->opd_ent_ndx(r_off
);
117 gold_assert(ndx
< this->opd_ent_shndx_
.size());
118 this->opd_ent_shndx_
[ndx
] = shndx
;
119 this->opd_ent_off_
[ndx
] = value
;
122 // Examine .rela.opd to build info about function entry points.
124 scan_opd_relocs(size_t reloc_count
,
125 const unsigned char* prelocs
,
126 const unsigned char* plocal_syms
);
129 do_read_relocs(Read_relocs_data
*);
132 do_find_special_sections(Read_symbols_data
* sd
);
134 // Return offset in output GOT section that this object will use
135 // as a TOC pointer. Won't be just a constant with multi-toc support.
137 toc_base_offset() const
141 // Return index into opd_ent_shndx or opd_ent_off array for .opd entry
142 // at OFF. .opd entries are 24 bytes long, but they can be spaced
143 // 16 bytes apart when the language doesn't use the last 8-byte
144 // word, the environment pointer. Thus dividing the entry section
145 // offset by 16 will give an index into opd_ent_shndx_ and
146 // opd_ent_off_ that works for either layout of .opd. (It leaves
147 // some elements of the vectors unused when .opd entries are spaced
148 // 24 bytes apart, but we don't know the spacing until relocations
149 // are processed, and in any case it is possible for an object to
150 // have some entries spaced 16 bytes apart and others 24 bytes apart.)
152 opd_ent_ndx(size_t off
) const
155 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
156 unsigned int special_
;
157 // The first 8-byte word of an OPD entry gives the address of the
158 // entry point of the function. Relocatable object files have a
159 // relocation on this word. The following two vectors record the
160 // section and offset specified by these relocations.
161 std::vector
<unsigned int> opd_ent_shndx_
;
162 std::vector
<Offset
> opd_ent_off_
;
165 template<int size
, bool big_endian
>
166 class Target_powerpc
: public Sized_target
<size
, big_endian
>
170 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
171 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
172 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Signed_address
;
173 static const Address invalid_address
= static_cast<Address
>(0) - 1;
174 // Offset of tp and dtp pointers from start of TLS block.
175 static const Address tp_offset
= 0x7000;
176 static const Address dtp_offset
= 0x8000;
179 : Sized_target
<size
, big_endian
>(&powerpc_info
),
180 got_(NULL
), plt_(NULL
), glink_(NULL
), rela_dyn_(NULL
),
181 copy_relocs_(elfcpp::R_POWERPC_COPY
),
182 dynbss_(NULL
), tlsld_got_offset_(-1U)
186 // Process the relocations to determine unreferenced sections for
187 // garbage collection.
189 gc_process_relocs(Symbol_table
* symtab
,
191 Sized_relobj_file
<size
, big_endian
>* object
,
192 unsigned int data_shndx
,
193 unsigned int sh_type
,
194 const unsigned char* prelocs
,
196 Output_section
* output_section
,
197 bool needs_special_offset_handling
,
198 size_t local_symbol_count
,
199 const unsigned char* plocal_symbols
);
201 // Scan the relocations to look for symbol adjustments.
203 scan_relocs(Symbol_table
* symtab
,
205 Sized_relobj_file
<size
, big_endian
>* object
,
206 unsigned int data_shndx
,
207 unsigned int sh_type
,
208 const unsigned char* prelocs
,
210 Output_section
* output_section
,
211 bool needs_special_offset_handling
,
212 size_t local_symbol_count
,
213 const unsigned char* plocal_symbols
);
215 // Map input .toc section to output .got section.
217 do_output_section_name(const Relobj
*, const char* name
, size_t* plen
) const
219 if (size
== 64 && strcmp(name
, ".toc") == 0)
227 // Finalize the sections.
229 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
231 // Return the value to use for a dynamic which requires special
234 do_dynsym_value(const Symbol
*) const;
236 // Relocate a section.
238 relocate_section(const Relocate_info
<size
, big_endian
>*,
239 unsigned int sh_type
,
240 const unsigned char* prelocs
,
242 Output_section
* output_section
,
243 bool needs_special_offset_handling
,
245 Address view_address
,
246 section_size_type view_size
,
247 const Reloc_symbol_changes
*);
249 // Scan the relocs during a relocatable link.
251 scan_relocatable_relocs(Symbol_table
* symtab
,
253 Sized_relobj_file
<size
, big_endian
>* object
,
254 unsigned int data_shndx
,
255 unsigned int sh_type
,
256 const unsigned char* prelocs
,
258 Output_section
* output_section
,
259 bool needs_special_offset_handling
,
260 size_t local_symbol_count
,
261 const unsigned char* plocal_symbols
,
262 Relocatable_relocs
*);
264 // Emit relocations for a section.
266 relocate_relocs(const Relocate_info
<size
, big_endian
>*,
267 unsigned int sh_type
,
268 const unsigned char* prelocs
,
270 Output_section
* output_section
,
271 off_t offset_in_output_section
,
272 const Relocatable_relocs
*,
274 Address view_address
,
276 unsigned char* reloc_view
,
277 section_size_type reloc_view_size
);
279 // Return whether SYM is defined by the ABI.
281 do_is_defined_by_abi(const Symbol
* sym
) const
283 return strcmp(sym
->name(), "__tls_get_addr") == 0;
286 // Return the size of the GOT section.
290 gold_assert(this->got_
!= NULL
);
291 return this->got_
->data_size();
294 // Get the PLT section.
295 const Output_data_plt_powerpc
<size
, big_endian
>*
298 gold_assert(this->plt_
!= NULL
);
302 // Get the .glink section.
303 const Output_data_glink
<size
, big_endian
>*
304 glink_section() const
306 gold_assert(this->glink_
!= NULL
);
310 // Get the GOT section.
311 const Output_data_got_powerpc
<size
, big_endian
>*
314 gold_assert(this->got_
!= NULL
);
319 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
320 const elfcpp::Ehdr
<size
, big_endian
>&);
322 // Return the number of entries in the GOT.
324 got_entry_count() const
326 if (this->got_
== NULL
)
328 return this->got_size() / (size
/ 8);
331 // Return the number of entries in the PLT.
333 plt_entry_count() const;
335 // Return the offset of the first non-reserved PLT entry.
337 first_plt_entry_offset() const;
339 // Return the size of each PLT entry.
341 plt_entry_size() const;
345 // The class which scans relocations.
350 : issued_non_pic_error_(false)
354 get_reference_flags(unsigned int r_type
);
357 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
358 Sized_relobj_file
<size
, big_endian
>* object
,
359 unsigned int data_shndx
,
360 Output_section
* output_section
,
361 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
362 const elfcpp::Sym
<size
, big_endian
>& lsym
);
365 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
366 Sized_relobj_file
<size
, big_endian
>* object
,
367 unsigned int data_shndx
,
368 Output_section
* output_section
,
369 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
373 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
375 Sized_relobj_file
<size
, big_endian
>* ,
378 const elfcpp::Rela
<size
, big_endian
>& ,
380 const elfcpp::Sym
<size
, big_endian
>&)
384 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
386 Sized_relobj_file
<size
, big_endian
>* ,
389 const elfcpp::Rela
<size
,
391 unsigned int , Symbol
*)
396 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
397 unsigned int r_type
);
400 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
401 unsigned int r_type
, Symbol
*);
404 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
405 Target_powerpc
* target
);
408 check_non_pic(Relobj
*, unsigned int r_type
);
410 // Whether we have issued an error about a non-PIC compilation.
411 bool issued_non_pic_error_
;
414 // The class which implements relocation.
418 // Use 'at' branch hints when true, 'y' when false.
419 // FIXME maybe: set this with an option.
420 static const bool is_isa_v2
= true;
424 CALL_NOT_EXPECTED
= 0,
430 : call_tls_get_addr_(CALL_NOT_EXPECTED
)
435 if (this->call_tls_get_addr_
!= CALL_NOT_EXPECTED
)
437 // FIXME: This needs to specify the location somehow.
438 gold_error(_("missing expected __tls_get_addr call"));
442 // Do a relocation. Return false if the caller should not issue
443 // any warnings about this relocation.
445 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
446 Output_section
*, size_t relnum
,
447 const elfcpp::Rela
<size
, big_endian
>&,
448 unsigned int r_type
, const Sized_symbol
<size
>*,
449 const Symbol_value
<size
>*,
451 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
454 // This is set if we should skip the next reloc, which should be a
455 // call to __tls_get_addr.
456 enum skip_tls call_tls_get_addr_
;
459 // A class which returns the size required for a relocation type,
460 // used while scanning relocs during a relocatable link.
461 class Relocatable_size_for_reloc
465 get_size_for_reloc(unsigned int, Relobj
*)
472 // Optimize the TLS relocation type based on what we know about the
473 // symbol. IS_FINAL is true if the final address of this symbol is
474 // known at link time.
476 tls::Tls_optimization
477 optimize_tls_gd(bool is_final
)
479 // If we are generating a shared library, then we can't do anything
481 if (parameters
->options().shared())
482 return tls::TLSOPT_NONE
;
485 return tls::TLSOPT_TO_IE
;
486 return tls::TLSOPT_TO_LE
;
489 tls::Tls_optimization
492 if (parameters
->options().shared())
493 return tls::TLSOPT_NONE
;
495 return tls::TLSOPT_TO_LE
;
498 tls::Tls_optimization
499 optimize_tls_ie(bool is_final
)
501 if (!is_final
|| parameters
->options().shared())
502 return tls::TLSOPT_NONE
;
504 return tls::TLSOPT_TO_LE
;
507 // Get the GOT section, creating it if necessary.
508 Output_data_got_powerpc
<size
, big_endian
>*
509 got_section(Symbol_table
*, Layout
*);
513 make_glink_section(Layout
*);
515 // Create the PLT section.
517 make_plt_section(Layout
*);
519 // Create a PLT entry for a global symbol.
521 make_plt_entry(Layout
*, Symbol
*,
522 const elfcpp::Rela
<size
, big_endian
>&,
523 const Sized_relobj
<size
, big_endian
>* object
);
525 // Create a GOT entry for local dynamic __tls_get_addr.
527 tlsld_got_offset(Symbol_table
* symtab
, Layout
* layout
,
528 Sized_relobj_file
<size
, big_endian
>* object
);
531 tlsld_got_offset() const
533 return this->tlsld_got_offset_
;
536 // Get the dynamic reloc section, creating it if necessary.
538 rela_dyn_section(Layout
*);
540 // Copy a relocation against a global symbol.
542 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
543 Sized_relobj_file
<size
, big_endian
>* object
,
544 unsigned int shndx
, Output_section
* output_section
,
545 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
547 this->copy_relocs_
.copy_reloc(symtab
, layout
,
548 symtab
->get_sized_symbol
<size
>(sym
),
549 object
, shndx
, output_section
,
550 reloc
, this->rela_dyn_section(layout
));
553 // Information about this specific target which we pass to the
554 // general Target structure.
555 static Target::Target_info powerpc_info
;
557 // The types of GOT entries needed for this platform.
558 // These values are exposed to the ABI in an incremental link.
559 // Do not renumber existing values without changing the version
560 // number of the .gnu_incremental_inputs section.
564 GOT_TYPE_TLSGD
, // double entry for @got@tlsgd
565 GOT_TYPE_DTPREL
, // entry for @got@dtprel
566 GOT_TYPE_TPREL
// entry for @got@tprel
569 // The GOT output section.
570 Output_data_got_powerpc
<size
, big_endian
>* got_
;
571 // The PLT output section.
572 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
573 // The .glink output section.
574 Output_data_glink
<size
, big_endian
>* glink_
;
575 // The dynamic reloc output section.
576 Reloc_section
* rela_dyn_
;
577 // Relocs saved to avoid a COPY reloc.
578 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
579 // Space for variables copied with a COPY reloc.
580 Output_data_space
* dynbss_
;
581 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
582 unsigned int tlsld_got_offset_
;
586 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
589 true, // is_big_endian
590 elfcpp::EM_PPC
, // machine_code
591 false, // has_make_symbol
592 false, // has_resolve
593 false, // has_code_fill
594 true, // is_default_stack_executable
595 false, // can_icf_inline_merge_sections
597 "/usr/lib/ld.so.1", // dynamic_linker
598 0x10000000, // default_text_segment_address
599 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
600 4 * 1024, // common_pagesize (overridable by -z common-page-size)
601 false, // isolate_execinstr
603 elfcpp::SHN_UNDEF
, // small_common_shndx
604 elfcpp::SHN_UNDEF
, // large_common_shndx
605 0, // small_common_section_flags
606 0, // large_common_section_flags
607 NULL
, // attributes_section
608 NULL
// attributes_vendor
612 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
615 false, // is_big_endian
616 elfcpp::EM_PPC
, // machine_code
617 false, // has_make_symbol
618 false, // has_resolve
619 false, // has_code_fill
620 true, // is_default_stack_executable
621 false, // can_icf_inline_merge_sections
623 "/usr/lib/ld.so.1", // dynamic_linker
624 0x10000000, // default_text_segment_address
625 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
626 4 * 1024, // common_pagesize (overridable by -z common-page-size)
627 false, // isolate_execinstr
629 elfcpp::SHN_UNDEF
, // small_common_shndx
630 elfcpp::SHN_UNDEF
, // large_common_shndx
631 0, // small_common_section_flags
632 0, // large_common_section_flags
633 NULL
, // attributes_section
634 NULL
// attributes_vendor
638 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
641 true, // is_big_endian
642 elfcpp::EM_PPC64
, // machine_code
643 false, // has_make_symbol
644 false, // has_resolve
645 false, // has_code_fill
646 true, // is_default_stack_executable
647 false, // can_icf_inline_merge_sections
649 "/usr/lib/ld.so.1", // dynamic_linker
650 0x10000000, // default_text_segment_address
651 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
652 4 * 1024, // common_pagesize (overridable by -z common-page-size)
653 false, // isolate_execinstr
655 elfcpp::SHN_UNDEF
, // small_common_shndx
656 elfcpp::SHN_UNDEF
, // large_common_shndx
657 0, // small_common_section_flags
658 0, // large_common_section_flags
659 NULL
, // attributes_section
660 NULL
// attributes_vendor
664 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
667 false, // is_big_endian
668 elfcpp::EM_PPC64
, // machine_code
669 false, // has_make_symbol
670 false, // has_resolve
671 false, // has_code_fill
672 true, // is_default_stack_executable
673 false, // can_icf_inline_merge_sections
675 "/usr/lib/ld.so.1", // dynamic_linker
676 0x10000000, // default_text_segment_address
677 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
678 4 * 1024, // common_pagesize (overridable by -z common-page-size)
679 false, // isolate_execinstr
681 elfcpp::SHN_UNDEF
, // small_common_shndx
682 elfcpp::SHN_UNDEF
, // large_common_shndx
683 0, // small_common_section_flags
684 0, // large_common_section_flags
685 NULL
, // attributes_section
686 NULL
// attributes_vendor
690 is_branch_reloc(unsigned int r_type
)
692 return (r_type
== elfcpp::R_POWERPC_REL24
693 || r_type
== elfcpp::R_PPC_PLTREL24
694 || r_type
== elfcpp::R_PPC_LOCAL24PC
695 || r_type
== elfcpp::R_POWERPC_REL14
696 || r_type
== elfcpp::R_POWERPC_REL14_BRTAKEN
697 || r_type
== elfcpp::R_POWERPC_REL14_BRNTAKEN
698 || r_type
== elfcpp::R_POWERPC_ADDR24
699 || r_type
== elfcpp::R_POWERPC_ADDR14
700 || r_type
== elfcpp::R_POWERPC_ADDR14_BRTAKEN
701 || r_type
== elfcpp::R_POWERPC_ADDR14_BRNTAKEN
);
704 // If INSN is an opcode that may be used with an @tls operand, return
705 // the transformed insn for TLS optimisation, otherwise return 0. If
706 // REG is non-zero only match an insn with RB or RA equal to REG.
708 at_tls_transform(uint32_t insn
, unsigned int reg
)
710 if ((insn
& (0x3f << 26)) != 31 << 26)
714 if (reg
== 0 || ((insn
>> 11) & 0x1f) == reg
)
715 rtra
= insn
& ((1 << 26) - (1 << 16));
716 else if (((insn
>> 16) & 0x1f) == reg
)
717 rtra
= (insn
& (0x1f << 21)) | ((insn
& (0x1f << 11)) << 5);
721 if ((insn
& (0x3ff << 1)) == 266 << 1)
724 else if ((insn
& (0x1f << 1)) == 23 << 1
725 && ((insn
& (0x1f << 6)) < 14 << 6
726 || ((insn
& (0x1f << 6)) >= 16 << 6
727 && (insn
& (0x1f << 6)) < 24 << 6)))
728 // load and store indexed -> dform
729 insn
= (32 | ((insn
>> 6) & 0x1f)) << 26;
730 else if ((insn
& (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
731 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
732 insn
= ((58 | ((insn
>> 6) & 4)) << 26) | ((insn
>> 6) & 1);
733 else if ((insn
& (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
735 insn
= (58 << 26) | 2;
742 // Modified version of symtab.h class Symbol member
743 // Given a direct absolute or pc-relative static relocation against
744 // the global symbol, this function returns whether a dynamic relocation
749 needs_dynamic_reloc(const Symbol
* gsym
, int flags
)
751 // No dynamic relocations in a static link!
752 if (parameters
->doing_static_link())
755 // A reference to an undefined symbol from an executable should be
756 // statically resolved to 0, and does not need a dynamic relocation.
757 // This matches gnu ld behavior.
758 if (gsym
->is_undefined() && !parameters
->options().shared())
761 // A reference to an absolute symbol does not need a dynamic relocation.
762 if (gsym
->is_absolute())
765 // An absolute reference within a position-independent output file
766 // will need a dynamic relocation.
767 if ((flags
& Symbol::ABSOLUTE_REF
)
768 && parameters
->options().output_is_position_independent())
771 // A function call that can branch to a local PLT entry does not need
772 // a dynamic relocation.
773 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->has_plt_offset())
776 // A reference to any PLT entry in a non-position-independent executable
777 // does not need a dynamic relocation.
778 // Except due to having function descriptors on powerpc64 we don't define
779 // functions to their plt code in an executable, so this doesn't apply.
781 && !parameters
->options().output_is_position_independent()
782 && gsym
->has_plt_offset())
785 // A reference to a symbol defined in a dynamic object or to a
786 // symbol that is preemptible will need a dynamic relocation.
787 if (gsym
->is_from_dynobj()
788 || gsym
->is_undefined()
789 || gsym
->is_preemptible())
792 // For all other cases, return FALSE.
796 // Modified version of symtab.h class Symbol member
797 // Whether we should use the PLT offset associated with a symbol for
798 // a relocation. FLAGS is a set of Reference_flags.
802 use_plt_offset(const Symbol
* gsym
, int flags
)
804 // If the symbol doesn't have a PLT offset, then naturally we
805 // don't want to use it.
806 if (!gsym
->has_plt_offset())
809 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
810 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
813 // If we are going to generate a dynamic relocation, then we will
814 // wind up using that, so no need to use the PLT entry.
815 if (needs_dynamic_reloc
<size
>(gsym
, flags
))
818 // If the symbol is from a dynamic object, we need to use the PLT
820 if (gsym
->is_from_dynobj())
823 // If we are generating a shared object, and gsym symbol is
824 // undefined or preemptible, we need to use the PLT entry.
825 if (parameters
->options().shared()
826 && (gsym
->is_undefined() || gsym
->is_preemptible()))
829 // If gsym is a call to a weak undefined symbol, we need to use
830 // the PLT entry; the symbol may be defined by a library loaded
832 if ((flags
& Symbol::FUNCTION_CALL
) && gsym
->is_weak_undefined())
835 // Otherwise we can use the regular definition.
839 template<int size
, bool big_endian
>
840 class Powerpc_relocate_functions
857 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
858 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
860 template<int valsize
>
862 has_overflow_signed(Address value
)
864 // limit = 1 << (valsize - 1) without shift count exceeding size of type
865 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
866 limit
<<= ((valsize
- 1) >> 1);
867 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
868 return value
+ limit
> (limit
<< 1) - 1;
871 template<int valsize
>
873 has_overflow_bitfield(Address value
)
875 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
876 limit
<<= ((valsize
- 1) >> 1);
877 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
878 return value
> (limit
<< 1) - 1 && value
+ limit
> (limit
<< 1) - 1;
881 template<int valsize
>
882 static inline enum overflow_status
883 overflowed(Address value
, enum overflow_check overflow
)
885 if (overflow
== check_signed
)
887 if (has_overflow_signed
<valsize
>(value
))
888 return status_overflow
;
890 else if (overflow
== check_bitfield
)
892 if (has_overflow_bitfield
<valsize
>(value
))
893 return status_overflow
;
898 // Do a simple RELA relocation
899 template<int valsize
>
900 static inline enum overflow_status
901 rela(unsigned char* view
, Address value
, enum overflow_check overflow
)
903 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
904 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
905 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, value
);
906 return overflowed
<valsize
>(value
, overflow
);
909 template<int valsize
>
910 static inline enum overflow_status
911 rela(unsigned char* view
,
912 unsigned int right_shift
,
913 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
915 enum overflow_check overflow
)
917 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
918 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
919 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
920 Valtype reloc
= value
>> right_shift
;
923 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
924 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
927 // Do a simple RELA relocation, unaligned.
928 template<int valsize
>
929 static inline enum overflow_status
930 rela_ua(unsigned char* view
, Address value
, enum overflow_check overflow
)
932 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, value
);
933 return overflowed
<valsize
>(value
, overflow
);
936 template<int valsize
>
937 static inline enum overflow_status
938 rela_ua(unsigned char* view
,
939 unsigned int right_shift
,
940 typename
elfcpp::Valtype_base
<valsize
>::Valtype dst_mask
,
942 enum overflow_check overflow
)
944 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
946 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(view
);
947 Valtype reloc
= value
>> right_shift
;
950 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
, val
| reloc
);
951 return overflowed
<valsize
>(value
>> right_shift
, overflow
);
955 // R_PPC64_ADDR64: (Symbol + Addend)
957 addr64(unsigned char* view
, Address value
)
958 { This::template rela
<64>(view
, value
, check_none
); }
960 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
962 addr64_u(unsigned char* view
, Address value
)
963 { This::template rela_ua
<64>(view
, value
, check_none
); }
965 // R_POWERPC_ADDR32: (Symbol + Addend)
966 static inline enum overflow_status
967 addr32(unsigned char* view
, Address value
, enum overflow_check overflow
)
968 { return This::template rela
<32>(view
, value
, overflow
); }
970 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
971 static inline enum overflow_status
972 addr32_u(unsigned char* view
, Address value
, enum overflow_check overflow
)
973 { return This::template rela_ua
<32>(view
, value
, overflow
); }
975 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
976 static inline enum overflow_status
977 addr24(unsigned char* view
, Address value
, enum overflow_check overflow
)
979 enum overflow_status stat
980 = This::template rela
<32>(view
, 0, 0x03fffffc, value
, overflow
);
981 if (overflow
!= check_none
&& (value
& 3) != 0)
982 stat
= status_overflow
;
986 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
987 static inline enum overflow_status
988 addr16(unsigned char* view
, Address value
, enum overflow_check overflow
)
989 { return This::template rela
<16>(view
, value
, overflow
); }
991 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
992 static inline enum overflow_status
993 addr16_u(unsigned char* view
, Address value
, enum overflow_check overflow
)
994 { return This::template rela_ua
<16>(view
, value
, overflow
); }
996 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
997 static inline enum overflow_status
998 addr16_ds(unsigned char* view
, Address value
, enum overflow_check overflow
)
1000 enum overflow_status stat
1001 = This::template rela
<16>(view
, 0, 0xfffc, value
, overflow
);
1002 if (overflow
!= check_none
&& (value
& 3) != 0)
1003 stat
= status_overflow
;
1007 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1009 addr16_hi(unsigned char* view
, Address value
)
1010 { This::template rela
<16>(view
, 16, 0xffff, value
, check_none
); }
1012 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1014 addr16_ha(unsigned char* view
, Address value
)
1015 { This::addr16_hi(view
, value
+ 0x8000); }
1017 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1019 addr16_hi2(unsigned char* view
, Address value
)
1020 { This::template rela
<16>(view
, 32, 0xffff, value
, check_none
); }
1022 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1024 addr16_ha2(unsigned char* view
, Address value
)
1025 { This::addr16_hi2(view
, value
+ 0x8000); }
1027 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1029 addr16_hi3(unsigned char* view
, Address value
)
1030 { This::template rela
<16>(view
, 48, 0xffff, value
, check_none
); }
1032 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1034 addr16_ha3(unsigned char* view
, Address value
)
1035 { This::addr16_hi3(view
, value
+ 0x8000); }
1037 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1038 static inline enum overflow_status
1039 addr14(unsigned char* view
, Address value
, enum overflow_check overflow
)
1041 enum overflow_status stat
1042 = This::template rela
<32>(view
, 0, 0xfffc, value
, overflow
);
1043 if (overflow
!= check_none
&& (value
& 3) != 0)
1044 stat
= status_overflow
;
1049 // Stash away the index of .got2 or .opd in a relocatable object, if
1050 // such a section exists.
1052 template<int size
, bool big_endian
>
1054 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
1055 Read_symbols_data
* sd
)
1057 const unsigned char* const pshdrs
= sd
->section_headers
->data();
1058 const unsigned char* namesu
= sd
->section_names
->data();
1059 const char* names
= reinterpret_cast<const char*>(namesu
);
1060 section_size_type names_size
= sd
->section_names_size
;
1061 const unsigned char* s
;
1063 s
= this->find_shdr(pshdrs
, size
== 32 ? ".got2" : ".opd",
1064 names
, names_size
, NULL
);
1067 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
1068 this->special_
= ndx
;
1070 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
1073 // Examine .rela.opd to build info about function entry points.
1075 template<int size
, bool big_endian
>
1077 Powerpc_relobj
<size
, big_endian
>::scan_opd_relocs(
1079 const unsigned char* prelocs
,
1080 const unsigned char* plocal_syms
)
1084 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
1086 const int reloc_size
1087 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
1088 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1090 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1092 Reltype
reloc(prelocs
);
1093 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
1094 = reloc
.get_r_info();
1095 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1096 if (r_type
== elfcpp::R_PPC64_ADDR64
)
1098 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1099 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
1102 if (r_sym
< this->local_symbol_count())
1104 typename
elfcpp::Sym
<size
, big_endian
>
1105 lsym(plocal_syms
+ r_sym
* sym_size
);
1106 shndx
= lsym
.get_st_shndx();
1107 shndx
= this->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
1108 value
= lsym
.get_st_value();
1111 shndx
= this->symbol_section_and_value(r_sym
, &value
,
1113 this->set_opd_ent(reloc
.get_r_offset(), shndx
,
1114 value
+ reloc
.get_r_addend());
1120 template<int size
, bool big_endian
>
1122 Powerpc_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
1124 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(rd
);
1127 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
1128 p
!= rd
->relocs
.end();
1131 if (p
->data_shndx
== this->opd_shndx())
1133 this->init_opd(this->section_size(this->opd_shndx()));
1134 this->scan_opd_relocs(p
->reloc_count
, p
->contents
->data(),
1135 rd
->local_symbols
->data());
1142 // Set up PowerPC target specific relobj.
1144 template<int size
, bool big_endian
>
1146 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
1147 const std::string
& name
,
1148 Input_file
* input_file
,
1149 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
1151 int et
= ehdr
.get_e_type();
1152 // ET_EXEC files are valid input for --just-symbols/-R,
1153 // and we treat them as relocatable objects.
1154 if (et
== elfcpp::ET_REL
1155 || (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols()))
1157 Powerpc_relobj
<size
, big_endian
>* obj
=
1158 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1162 else if (et
== elfcpp::ET_DYN
)
1164 Sized_dynobj
<size
, big_endian
>* obj
=
1165 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
1171 gold_error(_("%s: unsupported ELF file type %d"), name
.c_str(), et
);
1176 template<int size
, bool big_endian
>
1177 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
1180 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
1181 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
1183 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
1184 : Output_data_got
<size
, big_endian
>(),
1185 symtab_(symtab
), layout_(layout
),
1186 header_ent_cnt_(size
== 32 ? 3 : 1),
1187 header_index_(size
== 32 ? 0x2000 : 0)
1192 // Create a new GOT entry and return its offset.
1194 add_got_entry(Got_entry got_entry
)
1196 this->reserve_ent();
1197 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
1200 // Create a pair of new GOT entries and return the offset of the first.
1202 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
1204 this->reserve_ent(2);
1205 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
1210 add_constant_pair(Valtype c1
, Valtype c2
)
1212 this->reserve_ent(2);
1213 unsigned int got_offset
= this->add_constant(c1
);
1214 this->add_constant(c2
);
1218 // Offset of _GLOBAL_OFFSET_TABLE_.
1222 return this->got_offset(this->header_index_
);
1225 // Offset of base used to access the GOT/TOC.
1226 // The got/toc pointer reg will be set to this value.
1227 typename
elfcpp::Elf_types
<size
>::Elf_Off
1228 got_base_offset(const Powerpc_relobj
<size
, big_endian
>* object
) const
1231 return this->g_o_t();
1233 return (this->output_section()->address()
1234 + object
->toc_base_offset()
1238 // Ensure our GOT has a header.
1240 set_final_data_size()
1242 if (this->header_ent_cnt_
!= 0)
1243 this->make_header();
1244 Output_data_got
<size
, big_endian
>::set_final_data_size();
1247 // First word of GOT header needs some values that are not
1248 // handled by Output_data_got so poke them in here.
1249 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1251 do_write(Output_file
* of
)
1253 this->replace_constant(this->header_index_
,
1255 ? this->layout_
->dynamic_section()->address()
1256 : this->output_section()->address() + 0x8000));
1258 Output_data_got
<size
, big_endian
>::do_write(of
);
1263 reserve_ent(unsigned int cnt
= 1)
1265 if (this->header_ent_cnt_
== 0)
1267 if (this->num_entries() + cnt
> this->header_index_
)
1268 this->make_header();
1274 this->header_ent_cnt_
= 0;
1275 this->header_index_
= this->num_entries();
1278 Output_data_got
<size
, big_endian
>::add_constant(0);
1279 Output_data_got
<size
, big_endian
>::add_constant(0);
1280 Output_data_got
<size
, big_endian
>::add_constant(0);
1282 // Define _GLOBAL_OFFSET_TABLE_ at the header
1283 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1284 Symbol_table::PREDEFINED
,
1285 this, this->g_o_t(), 0,
1292 Output_data_got
<size
, big_endian
>::add_constant(0);
1295 // Stashed pointers.
1296 Symbol_table
* symtab_
;
1300 unsigned int header_ent_cnt_
;
1301 // GOT header index.
1302 unsigned int header_index_
;
1305 // Get the GOT section, creating it if necessary.
1307 template<int size
, bool big_endian
>
1308 Output_data_got_powerpc
<size
, big_endian
>*
1309 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
1312 if (this->got_
== NULL
)
1314 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1317 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
1319 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1320 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1321 this->got_
, ORDER_DATA
, false);
1327 // Get the dynamic reloc section, creating it if necessary.
1329 template<int size
, bool big_endian
>
1330 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
1331 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
1333 if (this->rela_dyn_
== NULL
)
1335 gold_assert(layout
!= NULL
);
1336 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1337 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1338 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1339 ORDER_DYNAMIC_RELOCS
, false);
1341 return this->rela_dyn_
;
1344 // A class to handle the PLT data.
1346 template<int size
, bool big_endian
>
1347 class Output_data_plt_powerpc
: public Output_section_data_build
1350 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
1351 size
, big_endian
> Reloc_section
;
1353 Output_data_plt_powerpc(Layout
*, Target_powerpc
<size
, big_endian
>*);
1355 // Add an entry to the PLT.
1359 // Return the .rela.plt section data.
1360 const Reloc_section
*
1366 // Return the number of PLT entries.
1370 return ((this->current_data_size() - initial_plt_entry_size
)
1374 // Return the offset of the first non-reserved PLT entry.
1376 first_plt_entry_offset()
1377 { return initial_plt_entry_size
; }
1379 // Return the size of a PLT entry.
1381 get_plt_entry_size()
1382 { return plt_entry_size
; }
1386 do_adjust_output_section(Output_section
* os
)
1391 // Write to a map file.
1393 do_print_to_mapfile(Mapfile
* mapfile
) const
1394 { mapfile
->print_output_data(this, _("** PLT")); }
1397 // The size of an entry in the PLT.
1398 static const int plt_entry_size
= size
== 32 ? 4 : 24;
1399 // The size of the first reserved entry.
1400 static const int initial_plt_entry_size
= size
== 32 ? 0 : 24;
1402 // Write out the PLT data.
1404 do_write(Output_file
*);
1406 // The reloc section.
1407 Reloc_section
* rel_
;
1408 // Allows access to .glink for do_write.
1409 Target_powerpc
<size
, big_endian
>* targ_
;
1412 // Create the PLT section.
1414 template<int size
, bool big_endian
>
1415 Output_data_plt_powerpc
<size
, big_endian
>::Output_data_plt_powerpc(
1417 Target_powerpc
<size
, big_endian
>* targ
)
1418 : Output_section_data_build(size
== 32 ? 4 : 8),
1421 this->rel_
= new Reloc_section(false);
1422 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
1423 elfcpp::SHF_ALLOC
, this->rel_
,
1424 ORDER_DYNAMIC_PLT_RELOCS
, false);
1427 // Add an entry to the PLT.
1429 template<int size
, bool big_endian
>
1431 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
1433 if (!gsym
->has_plt_offset())
1435 off_t off
= this->current_data_size();
1438 off
+= initial_plt_entry_size
;
1439 gsym
->set_plt_offset(off
);
1440 gsym
->set_needs_dynsym_entry();
1441 this->rel_
->add_global(gsym
, elfcpp::R_POWERPC_JMP_SLOT
, this, off
, 0);
1442 off
+= plt_entry_size
;
1443 this->set_current_data_size(off
);
1447 static const uint32_t add_0_11_11
= 0x7c0b5a14;
1448 static const uint32_t add_3_3_2
= 0x7c631214;
1449 static const uint32_t add_3_3_13
= 0x7c636a14;
1450 static const uint32_t add_11_0_11
= 0x7d605a14;
1451 static const uint32_t add_12_2_11
= 0x7d825a14;
1452 static const uint32_t addi_11_11
= 0x396b0000;
1453 static const uint32_t addi_12_12
= 0x398c0000;
1454 static const uint32_t addi_2_2
= 0x38420000;
1455 static const uint32_t addi_3_2
= 0x38620000;
1456 static const uint32_t addi_3_3
= 0x38630000;
1457 static const uint32_t addis_0_2
= 0x3c020000;
1458 static const uint32_t addis_0_13
= 0x3c0d0000;
1459 static const uint32_t addis_11_11
= 0x3d6b0000;
1460 static const uint32_t addis_11_30
= 0x3d7e0000;
1461 static const uint32_t addis_12_12
= 0x3d8c0000;
1462 static const uint32_t addis_12_2
= 0x3d820000;
1463 static const uint32_t addis_3_2
= 0x3c620000;
1464 static const uint32_t addis_3_13
= 0x3c6d0000;
1465 static const uint32_t b
= 0x48000000;
1466 static const uint32_t bcl_20_31
= 0x429f0005;
1467 static const uint32_t bctr
= 0x4e800420;
1468 static const uint32_t blrl
= 0x4e800021;
1469 static const uint32_t cror_15_15_15
= 0x4def7b82;
1470 static const uint32_t cror_31_31_31
= 0x4ffffb82;
1471 static const uint32_t ld_11_12
= 0xe96c0000;
1472 static const uint32_t ld_11_2
= 0xe9620000;
1473 static const uint32_t ld_2_1
= 0xe8410000;
1474 static const uint32_t ld_2_11
= 0xe84b0000;
1475 static const uint32_t ld_2_12
= 0xe84c0000;
1476 static const uint32_t ld_2_2
= 0xe8420000;
1477 static const uint32_t li_0_0
= 0x38000000;
1478 static const uint32_t lis_0_0
= 0x3c000000;
1479 static const uint32_t lis_11
= 0x3d600000;
1480 static const uint32_t lis_12
= 0x3d800000;
1481 static const uint32_t lwz_0_12
= 0x800c0000;
1482 static const uint32_t lwz_11_11
= 0x816b0000;
1483 static const uint32_t lwz_11_30
= 0x817e0000;
1484 static const uint32_t lwz_12_12
= 0x818c0000;
1485 static const uint32_t lwzu_0_12
= 0x840c0000;
1486 static const uint32_t mflr_0
= 0x7c0802a6;
1487 static const uint32_t mflr_11
= 0x7d6802a6;
1488 static const uint32_t mflr_12
= 0x7d8802a6;
1489 static const uint32_t mtctr_0
= 0x7c0903a6;
1490 static const uint32_t mtctr_11
= 0x7d6903a6;
1491 static const uint32_t mtlr_0
= 0x7c0803a6;
1492 static const uint32_t mtlr_12
= 0x7d8803a6;
1493 static const uint32_t nop
= 0x60000000;
1494 static const uint32_t ori_0_0_0
= 0x60000000;
1495 static const uint32_t std_2_1
= 0xf8410000;
1496 static const uint32_t sub_11_11_12
= 0x7d6c5850;
1498 // Write out the PLT.
1500 template<int size
, bool big_endian
>
1502 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
1506 const off_t offset
= this->offset();
1507 const section_size_type oview_size
1508 = convert_to_section_size_type(this->data_size());
1509 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1510 unsigned char* pov
= oview
;
1511 unsigned char* endpov
= oview
+ oview_size
;
1513 // The address the .glink branch table
1514 const Output_data_glink
<size
, big_endian
>* glink
1515 = this->targ_
->glink_section();
1516 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
1517 = glink
->address() + glink
->pltresolve();
1519 while (pov
< endpov
)
1521 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
1526 of
->write_output_view(offset
, oview_size
, oview
);
1530 // Create the PLT section.
1532 template<int size
, bool big_endian
>
1534 Target_powerpc
<size
, big_endian
>::make_plt_section(Layout
* layout
)
1536 if (this->plt_
== NULL
)
1538 if (this->glink_
== NULL
)
1539 make_glink_section(layout
);
1541 // Ensure that .rela.dyn always appears before .rela.plt This is
1542 // necessary due to how, on PowerPC and some other targets, .rela.dyn
1543 // needs to include .rela.plt in it's range.
1544 this->rela_dyn_section(layout
);
1546 this->plt_
= new Output_data_plt_powerpc
<size
, big_endian
>(layout
, this);
1547 layout
->add_output_section_data(".plt",
1549 ? elfcpp::SHT_PROGBITS
1550 : elfcpp::SHT_NOBITS
),
1551 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1560 // A class to handle .glink.
1562 template<int size
, bool big_endian
>
1563 class Output_data_glink
: public Output_section_data
1566 static const int pltresolve_size
= 16*4;
1568 Output_data_glink(Target_powerpc
<size
, big_endian
>*);
1572 add_entry(const Symbol
*, const elfcpp::Rela
<size
, big_endian
>&,
1573 const Sized_relobj
<size
, big_endian
>*);
1576 find_entry(const Symbol
*, const elfcpp::Rela
<size
, big_endian
>&,
1577 const Sized_relobj
<size
, big_endian
>*) const;
1580 glink_entry_size() const
1585 // FIXME: We should be using multiple glink sections for
1586 // stubs to support > 33M applications.
1593 return this->pltresolve_
;
1597 // Write to a map file.
1599 do_print_to_mapfile(Mapfile
* mapfile
) const
1600 { mapfile
->print_output_data(this, _("** glink")); }
1604 set_final_data_size();
1608 do_write(Output_file
*);
1613 Glink_sym_ent(const Symbol
* sym
,
1614 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1615 const Sized_relobj
<size
, big_endian
>* object
)
1616 : sym_(sym
), addend_(0), object_(0)
1619 this->addend_
= reloc
.get_r_addend();
1620 else if (parameters
->options().output_is_position_independent()
1621 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
1622 == elfcpp::R_PPC_PLTREL24
))
1624 this->addend_
= reloc
.get_r_addend();
1625 if (this->addend_
!= 0)
1626 this->object_
= object
;
1630 bool operator==(const Glink_sym_ent
& that
) const
1632 return (this->sym_
== that
.sym_
1633 && this->object_
== that
.object_
1634 && this->addend_
== that
.addend_
);
1638 unsigned int addend_
;
1639 const Sized_relobj
<size
, big_endian
>* object_
;
1642 class Glink_sym_ent_hash
1645 size_t operator()(const Glink_sym_ent
& ent
) const
1647 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
1648 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
1653 // Map sym/object/addend to index.
1654 typedef Unordered_map
<Glink_sym_ent
, unsigned int,
1655 Glink_sym_ent_hash
> Glink_entries
;
1656 Glink_entries glink_entries_
;
1658 // Offset of pltresolve stub (actually, branch table for 32-bit)
1661 // Allows access to .got and .plt for do_write.
1662 Target_powerpc
<size
, big_endian
>* targ_
;
1665 // Create the glink section.
1667 template<int size
, bool big_endian
>
1668 Output_data_glink
<size
, big_endian
>::Output_data_glink(
1669 Target_powerpc
<size
, big_endian
>* targ
)
1670 : Output_section_data(16),
1671 pltresolve_(0), targ_(targ
)
1675 // Add an entry to glink, if we do not already have one for this
1676 // sym/object/addend combo.
1678 template<int size
, bool big_endian
>
1680 Output_data_glink
<size
, big_endian
>::add_entry(
1682 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1683 const Sized_relobj
<size
, big_endian
>* object
)
1685 Glink_sym_ent
ent(gsym
, reloc
, object
);
1686 unsigned int indx
= this->glink_entries_
.size();
1687 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
1690 template<int size
, bool big_endian
>
1692 Output_data_glink
<size
, big_endian
>::find_entry(
1694 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1695 const Sized_relobj
<size
, big_endian
>* object
) const
1697 Glink_sym_ent
ent(gsym
, reloc
, object
);
1698 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
1699 gold_assert(p
!= this->glink_entries_
.end());
1703 template<int size
, bool big_endian
>
1705 Output_data_glink
<size
, big_endian
>::set_final_data_size()
1707 unsigned int count
= this->glink_entries_
.size();
1708 off_t total
= count
;
1715 this->pltresolve_
= total
;
1717 // space for branch table
1718 total
+= 4 * (count
- 1);
1720 total
+= -total
& 15;
1721 total
+= this->pltresolve_size
;
1726 this->pltresolve_
= total
;
1727 total
+= this->pltresolve_size
;
1729 // space for branch table
1732 total
+= 4 * (count
- 0x8000);
1736 this->set_data_size(total
);
1739 static inline uint32_t
1745 static inline uint32_t
1751 static inline uint32_t
1754 return hi(a
+ 0x8000);
1757 template<bool big_endian
>
1759 write_insn(unsigned char* p
, uint32_t v
)
1761 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
1764 // Write out .glink.
1766 template<int size
, bool big_endian
>
1768 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
1770 const off_t off
= this->offset();
1771 const section_size_type oview_size
=
1772 convert_to_section_size_type(this->data_size());
1773 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1776 // The base address of the .plt section.
1777 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1778 Address plt_base
= this->targ_
->plt_section()->address();
1780 const Output_data_got_powerpc
<size
, big_endian
>* got
1781 = this->targ_
->got_section();
1785 Address got_os_addr
= got
->output_section()->address();
1787 // Write out call stubs.
1788 typename
Glink_entries::const_iterator g
;
1789 for (g
= this->glink_entries_
.begin();
1790 g
!= this->glink_entries_
.end();
1793 Address plt_addr
= plt_base
+ g
->first
.sym_
->plt_offset();
1794 const Powerpc_relobj
<size
, big_endian
>* ppcobj
= static_cast
1795 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
1796 Address got_addr
= got_os_addr
+ ppcobj
->toc_base_offset();
1797 Address pltoff
= plt_addr
- got_addr
;
1799 if (pltoff
+ 0x80008000 > 0xffffffff || (pltoff
& 7) != 0)
1800 gold_error(_("%s: linkage table error against `%s'"),
1801 g
->first
.object_
->name().c_str(),
1802 g
->first
.sym_
->demangled_name().c_str());
1804 p
= oview
+ g
->second
* this->glink_entry_size();
1805 if (ha(pltoff
) != 0)
1807 write_insn
<big_endian
>(p
, addis_12_2
+ ha(pltoff
)), p
+= 4;
1808 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
1809 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
)), p
+= 4;
1810 if (ha(pltoff
+ 16) != ha(pltoff
))
1812 write_insn
<big_endian
>(p
, addi_12_12
+ l(pltoff
)), p
+= 4;
1815 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1816 write_insn
<big_endian
>(p
, ld_2_12
+ l(pltoff
+ 8)), p
+= 4;
1817 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
+ 16)), p
+= 4;
1818 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1822 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
1823 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
)), p
+= 4;
1824 if (ha(pltoff
+ 16) != ha(pltoff
))
1826 write_insn
<big_endian
>(p
, addi_2_2
+ l(pltoff
)), p
+= 4;
1829 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1830 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
+ 16)), p
+= 4;
1831 write_insn
<big_endian
>(p
, ld_2_2
+ l(pltoff
+ 8)), p
+= 4;
1832 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1836 // Write pltresolve stub.
1837 p
= oview
+ this->pltresolve_
;
1838 Address after_bcl
= this->address() + this->pltresolve_
+ 16;
1839 Address pltoff
= plt_base
- after_bcl
;
1841 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
1843 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
1844 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
1845 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
1846 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
1847 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
1848 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
1849 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
1850 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
1851 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1852 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
1853 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1854 while (p
< oview
+ this->pltresolve_
+ this->pltresolve_size
)
1855 write_insn
<big_endian
>(p
, nop
), p
+= 4;
1857 // Write lazy link call stubs.
1859 while (p
< oview
+ oview_size
)
1863 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
1867 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
1868 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
1870 uint32_t branch_off
= this->pltresolve_
+ 8 - (p
- oview
);
1871 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
1877 // The address of _GLOBAL_OFFSET_TABLE_.
1878 Address g_o_t
= got
->address() + got
->g_o_t();
1880 // Write out call stubs.
1881 typename
Glink_entries::const_iterator g
;
1882 for (g
= this->glink_entries_
.begin();
1883 g
!= this->glink_entries_
.end();
1886 Address plt_addr
= plt_base
+ g
->first
.sym_
->plt_offset();
1888 const Address invalid_address
= static_cast<Address
>(-1);
1890 p
= oview
+ g
->second
* this->glink_entry_size();
1891 if (parameters
->options().output_is_position_independent())
1893 const Powerpc_relobj
<size
, big_endian
>* object
= static_cast
1894 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
1897 unsigned int got2
= object
->got2_shndx();
1898 got_addr
= g
->first
.object_
->get_output_section_offset(got2
);
1899 gold_assert(got_addr
!= invalid_address
);
1900 got_addr
+= (g
->first
.object_
->output_section(got2
)->address()
1901 + g
->first
.addend_
);
1906 Address pltoff
= plt_addr
- got_addr
;
1907 if (ha(pltoff
) == 0)
1909 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(pltoff
));
1910 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
1911 write_insn
<big_endian
>(p
+ 8, bctr
);
1915 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(pltoff
));
1916 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(pltoff
));
1917 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
1918 write_insn
<big_endian
>(p
+ 12, bctr
);
1923 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
1924 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
1925 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
1926 write_insn
<big_endian
>(p
+ 12, bctr
);
1930 // Write out pltresolve branch table.
1931 p
= oview
+ this->pltresolve_
;
1932 unsigned int the_end
= oview_size
- this->pltresolve_size
;
1933 unsigned char* end_p
= oview
+ the_end
;
1934 while (p
< end_p
- 8 * 4)
1935 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
1937 write_insn
<big_endian
>(p
, nop
), p
+= 4;
1939 // Write out pltresolve call stub.
1940 if (parameters
->options().output_is_position_independent())
1942 Address res0_off
= this->pltresolve_
;
1943 Address after_bcl_off
= the_end
+ 12;
1944 Address bcl_res0
= after_bcl_off
- res0_off
;
1946 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
1947 write_insn
<big_endian
>(p
+ 4, mflr_0
);
1948 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
1949 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
1950 write_insn
<big_endian
>(p
+ 16, mflr_12
);
1951 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
1952 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
1954 Address got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
1956 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
1957 if (ha(got_bcl
) == ha(got_bcl
+ 4))
1959 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
1960 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
1964 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
1965 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
1967 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
1968 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
1969 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
1970 write_insn
<big_endian
>(p
+ 52, bctr
);
1971 write_insn
<big_endian
>(p
+ 56, nop
);
1972 write_insn
<big_endian
>(p
+ 60, nop
);
1976 Address res0
= this->pltresolve_
+ this->address();
1978 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
1979 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
1980 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
1981 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
1983 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
1984 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
1985 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
1986 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
1987 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
1988 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
1990 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
1991 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
1992 write_insn
<big_endian
>(p
+ 32, bctr
);
1993 write_insn
<big_endian
>(p
+ 36, nop
);
1994 write_insn
<big_endian
>(p
+ 40, nop
);
1995 write_insn
<big_endian
>(p
+ 44, nop
);
1996 write_insn
<big_endian
>(p
+ 48, nop
);
1997 write_insn
<big_endian
>(p
+ 52, nop
);
1998 write_insn
<big_endian
>(p
+ 56, nop
);
1999 write_insn
<big_endian
>(p
+ 60, nop
);
2004 of
->write_output_view(off
, oview_size
, oview
);
2007 // Create the glink section.
2009 template<int size
, bool big_endian
>
2011 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
2013 if (this->glink_
== NULL
)
2015 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
2016 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
2017 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
2018 this->glink_
, ORDER_TEXT
, false);
2022 // Create a PLT entry for a global symbol.
2024 template<int size
, bool big_endian
>
2026 Target_powerpc
<size
, big_endian
>::make_plt_entry(
2029 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2030 const Sized_relobj
<size
, big_endian
>* object
)
2032 if (this->plt_
== NULL
)
2033 this->make_plt_section(layout
);
2035 this->plt_
->add_entry(gsym
);
2037 this->glink_
->add_entry(gsym
, reloc
, object
);
2040 // Return the number of entries in the PLT.
2042 template<int size
, bool big_endian
>
2044 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
2046 if (this->plt_
== NULL
)
2048 return this->plt_
->entry_count();
2051 // Return the offset of the first non-reserved PLT entry.
2053 template<int size
, bool big_endian
>
2055 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
2057 return Output_data_plt_powerpc
<size
, big_endian
>::first_plt_entry_offset();
2060 // Return the size of each PLT entry.
2062 template<int size
, bool big_endian
>
2064 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
2066 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
2069 // Create a GOT entry for local dynamic __tls_get_addr calls.
2071 template<int size
, bool big_endian
>
2073 Target_powerpc
<size
, big_endian
>::tlsld_got_offset(
2074 Symbol_table
* symtab
,
2076 Sized_relobj_file
<size
, big_endian
>* object
)
2078 if (this->tlsld_got_offset_
== -1U)
2080 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
2081 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
2082 Output_data_got_powerpc
<size
, big_endian
>* got
2083 = this->got_section(symtab
, layout
);
2084 unsigned int got_offset
= got
->add_constant_pair(0, 0);
2085 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
2087 this->tlsld_got_offset_
= got_offset
;
2089 return this->tlsld_got_offset_
;
2092 // Get the Reference_flags for a particular relocation.
2094 template<int size
, bool big_endian
>
2096 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
2100 case elfcpp::R_POWERPC_NONE
:
2101 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2102 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2103 case elfcpp::R_PPC64_TOC
:
2104 // No symbol reference.
2107 case elfcpp::R_PPC64_ADDR64
:
2108 case elfcpp::R_PPC64_UADDR64
:
2109 case elfcpp::R_POWERPC_ADDR32
:
2110 case elfcpp::R_POWERPC_UADDR32
:
2111 case elfcpp::R_POWERPC_ADDR16
:
2112 case elfcpp::R_POWERPC_UADDR16
:
2113 case elfcpp::R_POWERPC_ADDR16_LO
:
2114 case elfcpp::R_POWERPC_ADDR16_HI
:
2115 case elfcpp::R_POWERPC_ADDR16_HA
:
2116 return Symbol::ABSOLUTE_REF
;
2118 case elfcpp::R_POWERPC_ADDR24
:
2119 case elfcpp::R_POWERPC_ADDR14
:
2120 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2121 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2122 return Symbol::FUNCTION_CALL
| Symbol::ABSOLUTE_REF
;
2124 case elfcpp::R_POWERPC_REL32
:
2125 case elfcpp::R_PPC_LOCAL24PC
:
2126 case elfcpp::R_POWERPC_REL16
:
2127 case elfcpp::R_POWERPC_REL16_LO
:
2128 case elfcpp::R_POWERPC_REL16_HI
:
2129 case elfcpp::R_POWERPC_REL16_HA
:
2130 return Symbol::RELATIVE_REF
;
2132 case elfcpp::R_POWERPC_REL24
:
2133 case elfcpp::R_PPC_PLTREL24
:
2134 case elfcpp::R_POWERPC_REL14
:
2135 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
2136 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
2137 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
2139 case elfcpp::R_POWERPC_GOT16
:
2140 case elfcpp::R_POWERPC_GOT16_LO
:
2141 case elfcpp::R_POWERPC_GOT16_HI
:
2142 case elfcpp::R_POWERPC_GOT16_HA
:
2143 case elfcpp::R_PPC64_TOC16
:
2144 case elfcpp::R_PPC64_TOC16_LO
:
2145 case elfcpp::R_PPC64_TOC16_HI
:
2146 case elfcpp::R_PPC64_TOC16_HA
:
2147 case elfcpp::R_PPC64_TOC16_DS
:
2148 case elfcpp::R_PPC64_TOC16_LO_DS
:
2150 return Symbol::ABSOLUTE_REF
;
2152 case elfcpp::R_POWERPC_GOT_TPREL16
:
2153 case elfcpp::R_POWERPC_TLS
:
2154 return Symbol::TLS_REF
;
2156 case elfcpp::R_POWERPC_COPY
:
2157 case elfcpp::R_POWERPC_GLOB_DAT
:
2158 case elfcpp::R_POWERPC_JMP_SLOT
:
2159 case elfcpp::R_POWERPC_RELATIVE
:
2160 case elfcpp::R_POWERPC_DTPMOD
:
2162 // Not expected. We will give an error later.
2167 // Report an unsupported relocation against a local symbol.
2169 template<int size
, bool big_endian
>
2171 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
2172 Sized_relobj_file
<size
, big_endian
>* object
,
2173 unsigned int r_type
)
2175 gold_error(_("%s: unsupported reloc %u against local symbol"),
2176 object
->name().c_str(), r_type
);
2179 // We are about to emit a dynamic relocation of type R_TYPE. If the
2180 // dynamic linker does not support it, issue an error.
2182 template<int size
, bool big_endian
>
2184 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
2185 unsigned int r_type
)
2187 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
2189 // These are the relocation types supported by glibc for both 32-bit
2190 // and 64-bit powerpc.
2193 case elfcpp::R_POWERPC_RELATIVE
:
2194 case elfcpp::R_POWERPC_GLOB_DAT
:
2195 case elfcpp::R_POWERPC_DTPMOD
:
2196 case elfcpp::R_POWERPC_DTPREL
:
2197 case elfcpp::R_POWERPC_TPREL
:
2198 case elfcpp::R_POWERPC_JMP_SLOT
:
2199 case elfcpp::R_POWERPC_COPY
:
2200 case elfcpp::R_POWERPC_ADDR32
:
2201 case elfcpp::R_POWERPC_ADDR24
:
2202 case elfcpp::R_POWERPC_REL24
:
2213 // These are the relocation types supported only on 64-bit.
2214 case elfcpp::R_PPC64_ADDR64
:
2215 case elfcpp::R_PPC64_TPREL16_LO_DS
:
2216 case elfcpp::R_PPC64_TPREL16_DS
:
2217 case elfcpp::R_POWERPC_TPREL16
:
2218 case elfcpp::R_POWERPC_TPREL16_LO
:
2219 case elfcpp::R_POWERPC_TPREL16_HI
:
2220 case elfcpp::R_POWERPC_TPREL16_HA
:
2221 case elfcpp::R_PPC64_TPREL16_HIGHER
:
2222 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
2223 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
2224 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
2225 case elfcpp::R_PPC64_ADDR16_LO_DS
:
2226 case elfcpp::R_POWERPC_ADDR16_LO
:
2227 case elfcpp::R_POWERPC_ADDR16_HI
:
2228 case elfcpp::R_POWERPC_ADDR16_HA
:
2229 case elfcpp::R_POWERPC_ADDR30
:
2230 case elfcpp::R_PPC64_UADDR64
:
2231 case elfcpp::R_POWERPC_UADDR32
:
2232 case elfcpp::R_POWERPC_ADDR16
:
2233 case elfcpp::R_POWERPC_UADDR16
:
2234 case elfcpp::R_PPC64_ADDR16_DS
:
2235 case elfcpp::R_PPC64_ADDR16_HIGHER
:
2236 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
2237 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
2238 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
2239 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2240 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2241 case elfcpp::R_POWERPC_REL32
:
2242 case elfcpp::R_PPC64_REL64
:
2253 // These are the relocation types supported only on 32-bit.
2260 // This prevents us from issuing more than one error per reloc
2261 // section. But we can still wind up issuing more than one
2262 // error per object file.
2263 if (this->issued_non_pic_error_
)
2265 gold_assert(parameters
->options().output_is_position_independent());
2266 object
->error(_("requires unsupported dynamic reloc; "
2267 "recompile with -fPIC"));
2268 this->issued_non_pic_error_
= true;
2272 // Scan a relocation for a local symbol.
2274 template<int size
, bool big_endian
>
2276 Target_powerpc
<size
, big_endian
>::Scan::local(
2277 Symbol_table
* symtab
,
2279 Target_powerpc
<size
, big_endian
>* target
,
2280 Sized_relobj_file
<size
, big_endian
>* object
,
2281 unsigned int data_shndx
,
2282 Output_section
* output_section
,
2283 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2284 unsigned int r_type
,
2285 const elfcpp::Sym
<size
, big_endian
>& lsym
)
2287 Powerpc_relobj
<size
, big_endian
>* ppc_object
2288 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
2292 case elfcpp::R_POWERPC_NONE
:
2293 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2294 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2295 case elfcpp::R_PPC64_TOCSAVE
:
2296 case elfcpp::R_PPC_EMB_MRKREF
:
2297 case elfcpp::R_POWERPC_TLS
:
2300 case elfcpp::R_PPC64_TOC
:
2302 Output_data_got_powerpc
<size
, big_endian
>* got
2303 = target
->got_section(symtab
, layout
);
2304 if (parameters
->options().output_is_position_independent())
2306 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2307 rela_dyn
->add_output_section_relative(got
->output_section(),
2308 elfcpp::R_POWERPC_RELATIVE
,
2311 reloc
.get_r_offset(),
2312 ppc_object
->toc_base_offset());
2317 case elfcpp::R_PPC64_ADDR64
:
2318 case elfcpp::R_PPC64_UADDR64
:
2319 case elfcpp::R_POWERPC_ADDR32
:
2320 case elfcpp::R_POWERPC_UADDR32
:
2321 case elfcpp::R_POWERPC_ADDR24
:
2322 case elfcpp::R_POWERPC_ADDR16
:
2323 case elfcpp::R_POWERPC_ADDR16_LO
:
2324 case elfcpp::R_POWERPC_ADDR16_HI
:
2325 case elfcpp::R_POWERPC_ADDR16_HA
:
2326 case elfcpp::R_POWERPC_UADDR16
:
2327 case elfcpp::R_PPC64_ADDR16_HIGHER
:
2328 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
2329 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
2330 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
2331 case elfcpp::R_PPC64_ADDR16_DS
:
2332 case elfcpp::R_PPC64_ADDR16_LO_DS
:
2333 case elfcpp::R_POWERPC_ADDR14
:
2334 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2335 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2336 // If building a shared library (or a position-independent
2337 // executable), we need to create a dynamic relocation for
2339 if (parameters
->options().output_is_position_independent())
2341 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2343 if ((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
2344 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
2346 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2347 rela_dyn
->add_local_relative(object
, r_sym
,
2348 elfcpp::R_POWERPC_RELATIVE
,
2349 output_section
, data_shndx
,
2350 reloc
.get_r_offset(),
2351 reloc
.get_r_addend(), false);
2355 check_non_pic(object
, r_type
);
2356 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2357 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
2358 data_shndx
, reloc
.get_r_offset(),
2359 reloc
.get_r_addend());
2364 case elfcpp::R_POWERPC_REL32
:
2365 case elfcpp::R_POWERPC_REL24
:
2366 case elfcpp::R_PPC_LOCAL24PC
:
2367 case elfcpp::R_POWERPC_REL16
:
2368 case elfcpp::R_POWERPC_REL16_LO
:
2369 case elfcpp::R_POWERPC_REL16_HI
:
2370 case elfcpp::R_POWERPC_REL16_HA
:
2371 case elfcpp::R_POWERPC_REL14
:
2372 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
2373 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
2374 case elfcpp::R_POWERPC_SECTOFF
:
2375 case elfcpp::R_POWERPC_TPREL16
:
2376 case elfcpp::R_POWERPC_DTPREL16
:
2377 case elfcpp::R_POWERPC_SECTOFF_LO
:
2378 case elfcpp::R_POWERPC_TPREL16_LO
:
2379 case elfcpp::R_POWERPC_DTPREL16_LO
:
2380 case elfcpp::R_POWERPC_SECTOFF_HI
:
2381 case elfcpp::R_POWERPC_TPREL16_HI
:
2382 case elfcpp::R_POWERPC_DTPREL16_HI
:
2383 case elfcpp::R_POWERPC_SECTOFF_HA
:
2384 case elfcpp::R_POWERPC_TPREL16_HA
:
2385 case elfcpp::R_POWERPC_DTPREL16_HA
:
2386 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
2387 case elfcpp::R_PPC64_TPREL16_HIGHER
:
2388 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
2389 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
2390 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
2391 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
2392 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
2393 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
2394 case elfcpp::R_PPC64_TPREL16_DS
:
2395 case elfcpp::R_PPC64_TPREL16_LO_DS
:
2396 case elfcpp::R_PPC64_DTPREL16_DS
:
2397 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
2398 case elfcpp::R_PPC64_SECTOFF_DS
:
2399 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
2400 case elfcpp::R_PPC64_TLSGD
:
2401 case elfcpp::R_PPC64_TLSLD
:
2404 case elfcpp::R_POWERPC_GOT16
:
2405 case elfcpp::R_POWERPC_GOT16_LO
:
2406 case elfcpp::R_POWERPC_GOT16_HI
:
2407 case elfcpp::R_POWERPC_GOT16_HA
:
2408 case elfcpp::R_PPC64_GOT16_DS
:
2409 case elfcpp::R_PPC64_GOT16_LO_DS
:
2411 // The symbol requires a GOT entry.
2412 Output_data_got_powerpc
<size
, big_endian
>* got
2413 = target
->got_section(symtab
, layout
);
2414 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2416 // If we are generating a shared object, we need to add a
2417 // dynamic relocation for this symbol's GOT entry.
2418 if (parameters
->options().output_is_position_independent())
2420 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
2422 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2425 off
= got
->add_constant(0);
2426 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
2427 rela_dyn
->add_local_relative(object
, r_sym
,
2428 elfcpp::R_POWERPC_RELATIVE
,
2429 got
, off
, 0, false);
2433 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
2437 case elfcpp::R_PPC64_TOC16
:
2438 case elfcpp::R_PPC64_TOC16_LO
:
2439 case elfcpp::R_PPC64_TOC16_HI
:
2440 case elfcpp::R_PPC64_TOC16_HA
:
2441 case elfcpp::R_PPC64_TOC16_DS
:
2442 case elfcpp::R_PPC64_TOC16_LO_DS
:
2443 // We need a GOT section.
2444 target
->got_section(symtab
, layout
);
2447 case elfcpp::R_POWERPC_GOT_TLSGD16
:
2448 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
2449 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
2450 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
2452 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(true);
2453 if (tls_type
== tls::TLSOPT_NONE
)
2455 Output_data_got_powerpc
<size
, big_endian
>* got
2456 = target
->got_section(symtab
, layout
);
2457 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2458 unsigned int shndx
= lsym
.get_st_shndx();
2460 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2461 gold_assert(is_ordinary
);
2462 got
->add_local_pair_with_rel(object
, r_sym
,
2465 target
->rela_dyn_section(layout
),
2466 elfcpp::R_POWERPC_DTPMOD
,
2467 elfcpp::R_POWERPC_DTPREL
);
2469 else if (tls_type
== tls::TLSOPT_TO_LE
)
2471 // no GOT relocs needed for Local Exec.
2478 case elfcpp::R_POWERPC_GOT_TLSLD16
:
2479 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
2480 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
2481 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
2483 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
2484 if (tls_type
== tls::TLSOPT_NONE
)
2485 target
->tlsld_got_offset(symtab
, layout
, object
);
2486 else if (tls_type
== tls::TLSOPT_TO_LE
)
2488 // no GOT relocs needed for Local Exec.
2489 if (parameters
->options().emit_relocs())
2491 Output_section
* os
= layout
->tls_segment()->first_section();
2492 gold_assert(os
!= NULL
);
2493 os
->set_needs_symtab_index();
2501 case elfcpp::R_POWERPC_GOT_DTPREL16
:
2502 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
2503 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
2504 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
2506 Output_data_got_powerpc
<size
, big_endian
>* got
2507 = target
->got_section(symtab
, layout
);
2508 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2509 got
->add_local_with_rel(object
, r_sym
, GOT_TYPE_DTPREL
,
2510 target
->rela_dyn_section(layout
),
2511 elfcpp::R_POWERPC_DTPREL
);
2515 case elfcpp::R_POWERPC_GOT_TPREL16
:
2516 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
2517 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
2518 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
2520 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(true);
2521 if (tls_type
== tls::TLSOPT_NONE
)
2523 Output_data_got_powerpc
<size
, big_endian
>* got
2524 = target
->got_section(symtab
, layout
);
2525 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2526 got
->add_local_with_rel(object
, r_sym
, GOT_TYPE_TPREL
,
2527 target
->rela_dyn_section(layout
),
2528 elfcpp::R_POWERPC_TPREL
);
2530 else if (tls_type
== tls::TLSOPT_TO_LE
)
2532 // no GOT relocs needed for Local Exec.
2540 unsupported_reloc_local(object
, r_type
);
2545 // Report an unsupported relocation against a global symbol.
2547 template<int size
, bool big_endian
>
2549 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
2550 Sized_relobj_file
<size
, big_endian
>* object
,
2551 unsigned int r_type
,
2554 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
2555 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
2558 // Scan a relocation for a global symbol.
2560 template<int size
, bool big_endian
>
2562 Target_powerpc
<size
, big_endian
>::Scan::global(
2563 Symbol_table
* symtab
,
2565 Target_powerpc
<size
, big_endian
>* target
,
2566 Sized_relobj_file
<size
, big_endian
>* object
,
2567 unsigned int data_shndx
,
2568 Output_section
* output_section
,
2569 const elfcpp::Rela
<size
, big_endian
>& reloc
,
2570 unsigned int r_type
,
2573 Powerpc_relobj
<size
, big_endian
>* ppc_object
2574 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(object
);
2578 case elfcpp::R_POWERPC_NONE
:
2579 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2580 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2581 case elfcpp::R_PPC_LOCAL24PC
:
2582 case elfcpp::R_PPC_EMB_MRKREF
:
2583 case elfcpp::R_POWERPC_TLS
:
2586 case elfcpp::R_PPC64_TOC
:
2588 Output_data_got_powerpc
<size
, big_endian
>* got
2589 = target
->got_section(symtab
, layout
);
2590 if (parameters
->options().output_is_position_independent())
2592 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2593 Powerpc_relobj
<size
, big_endian
>* symobj
= ppc_object
;
2594 if (data_shndx
!= ppc_object
->opd_shndx())
2595 symobj
= static_cast
2596 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
2597 rela_dyn
->add_output_section_relative(got
->output_section(),
2598 elfcpp::R_POWERPC_RELATIVE
,
2601 reloc
.get_r_offset(),
2602 symobj
->toc_base_offset());
2607 case elfcpp::R_PPC64_ADDR64
:
2608 case elfcpp::R_PPC64_UADDR64
:
2609 case elfcpp::R_POWERPC_ADDR32
:
2610 case elfcpp::R_POWERPC_UADDR32
:
2611 case elfcpp::R_POWERPC_ADDR24
:
2612 case elfcpp::R_POWERPC_ADDR16
:
2613 case elfcpp::R_POWERPC_ADDR16_LO
:
2614 case elfcpp::R_POWERPC_ADDR16_HI
:
2615 case elfcpp::R_POWERPC_ADDR16_HA
:
2616 case elfcpp::R_POWERPC_UADDR16
:
2617 case elfcpp::R_PPC64_ADDR16_HIGHER
:
2618 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
2619 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
2620 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
2621 case elfcpp::R_PPC64_ADDR16_DS
:
2622 case elfcpp::R_PPC64_ADDR16_LO_DS
:
2623 case elfcpp::R_POWERPC_ADDR14
:
2624 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
2625 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
2627 // Make a PLT entry if necessary.
2628 if (gsym
->needs_plt_entry())
2630 target
->make_plt_entry(layout
, gsym
, reloc
, 0);
2631 // Since this is not a PC-relative relocation, we may be
2632 // taking the address of a function. In that case we need to
2633 // set the entry in the dynamic symbol table to the address of
2636 && gsym
->is_from_dynobj() && !parameters
->options().shared())
2637 gsym
->set_needs_dynsym_value();
2639 // Make a dynamic relocation if necessary.
2640 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
2642 if (gsym
->may_need_copy_reloc())
2644 target
->copy_reloc(symtab
, layout
, object
,
2645 data_shndx
, output_section
, gsym
, reloc
);
2647 else if (((size
== 32 && r_type
== elfcpp::R_POWERPC_ADDR32
)
2648 || (size
== 64 && r_type
== elfcpp::R_PPC64_ADDR64
))
2649 && (gsym
->can_use_relative_reloc(false)
2650 || data_shndx
== ppc_object
->opd_shndx()))
2652 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2653 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
2654 output_section
, object
,
2655 data_shndx
, reloc
.get_r_offset(),
2656 reloc
.get_r_addend(), false);
2660 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2661 check_non_pic(object
, r_type
);
2662 rela_dyn
->add_global(gsym
, r_type
, output_section
,
2664 reloc
.get_r_offset(),
2665 reloc
.get_r_addend());
2671 case elfcpp::R_PPC_PLTREL24
:
2672 case elfcpp::R_POWERPC_REL24
:
2674 if (gsym
->needs_plt_entry()
2675 || (!gsym
->final_value_is_known()
2676 && !(gsym
->is_defined()
2677 && !gsym
->is_from_dynobj()
2678 && !gsym
->is_preemptible())))
2679 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
2680 // Make a dynamic relocation if necessary.
2681 if (needs_dynamic_reloc
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
2683 if (gsym
->may_need_copy_reloc())
2685 target
->copy_reloc(symtab
, layout
, object
,
2686 data_shndx
, output_section
, gsym
,
2691 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2692 check_non_pic(object
, r_type
);
2693 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
2694 data_shndx
, reloc
.get_r_offset(),
2695 reloc
.get_r_addend());
2701 case elfcpp::R_POWERPC_REL32
:
2702 case elfcpp::R_POWERPC_REL16
:
2703 case elfcpp::R_POWERPC_REL16_LO
:
2704 case elfcpp::R_POWERPC_REL16_HI
:
2705 case elfcpp::R_POWERPC_REL16_HA
:
2706 case elfcpp::R_POWERPC_REL14
:
2707 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
2708 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
2709 case elfcpp::R_POWERPC_SECTOFF
:
2710 case elfcpp::R_POWERPC_TPREL16
:
2711 case elfcpp::R_POWERPC_DTPREL16
:
2712 case elfcpp::R_POWERPC_SECTOFF_LO
:
2713 case elfcpp::R_POWERPC_TPREL16_LO
:
2714 case elfcpp::R_POWERPC_DTPREL16_LO
:
2715 case elfcpp::R_POWERPC_SECTOFF_HI
:
2716 case elfcpp::R_POWERPC_TPREL16_HI
:
2717 case elfcpp::R_POWERPC_DTPREL16_HI
:
2718 case elfcpp::R_POWERPC_SECTOFF_HA
:
2719 case elfcpp::R_POWERPC_TPREL16_HA
:
2720 case elfcpp::R_POWERPC_DTPREL16_HA
:
2721 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
2722 case elfcpp::R_PPC64_TPREL16_HIGHER
:
2723 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
2724 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
2725 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
2726 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
2727 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
2728 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
2729 case elfcpp::R_PPC64_TPREL16_DS
:
2730 case elfcpp::R_PPC64_TPREL16_LO_DS
:
2731 case elfcpp::R_PPC64_DTPREL16_DS
:
2732 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
2733 case elfcpp::R_PPC64_SECTOFF_DS
:
2734 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
2735 case elfcpp::R_PPC64_TLSGD
:
2736 case elfcpp::R_PPC64_TLSLD
:
2739 case elfcpp::R_POWERPC_GOT16
:
2740 case elfcpp::R_POWERPC_GOT16_LO
:
2741 case elfcpp::R_POWERPC_GOT16_HI
:
2742 case elfcpp::R_POWERPC_GOT16_HA
:
2743 case elfcpp::R_PPC64_GOT16_DS
:
2744 case elfcpp::R_PPC64_GOT16_LO_DS
:
2746 // The symbol requires a GOT entry.
2747 Output_data_got_powerpc
<size
, big_endian
>* got
;
2749 got
= target
->got_section(symtab
, layout
);
2750 if (gsym
->final_value_is_known())
2751 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
2754 // If this symbol is not fully resolved, we need to add a
2755 // dynamic relocation for it.
2756 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2757 if (gsym
->is_from_dynobj()
2758 || gsym
->is_undefined()
2759 || gsym
->is_preemptible())
2760 got
->add_global_with_rel(gsym
, GOT_TYPE_STANDARD
, rela_dyn
,
2761 elfcpp::R_POWERPC_GLOB_DAT
);
2762 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
2764 unsigned int off
= got
->add_constant(0);
2766 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
2767 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
2768 got
, off
, 0, false);
2774 case elfcpp::R_PPC64_TOC16
:
2775 case elfcpp::R_PPC64_TOC16_LO
:
2776 case elfcpp::R_PPC64_TOC16_HI
:
2777 case elfcpp::R_PPC64_TOC16_HA
:
2778 case elfcpp::R_PPC64_TOC16_DS
:
2779 case elfcpp::R_PPC64_TOC16_LO_DS
:
2780 // We need a GOT section.
2781 target
->got_section(symtab
, layout
);
2784 case elfcpp::R_POWERPC_GOT_TLSGD16
:
2785 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
2786 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
2787 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
2789 const bool final
= gsym
->final_value_is_known();
2790 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
2791 if (tls_type
== tls::TLSOPT_NONE
)
2793 Output_data_got_powerpc
<size
, big_endian
>* got
2794 = target
->got_section(symtab
, layout
);
2795 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLSGD
,
2796 target
->rela_dyn_section(layout
),
2797 elfcpp::R_POWERPC_DTPMOD
,
2798 elfcpp::R_POWERPC_DTPREL
);
2800 else if (tls_type
== tls::TLSOPT_TO_IE
)
2802 Output_data_got_powerpc
<size
, big_endian
>* got
2803 = target
->got_section(symtab
, layout
);
2804 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
,
2805 target
->rela_dyn_section(layout
),
2806 elfcpp::R_POWERPC_TPREL
);
2808 else if (tls_type
== tls::TLSOPT_TO_LE
)
2810 // no GOT relocs needed for Local Exec.
2817 case elfcpp::R_POWERPC_GOT_TLSLD16
:
2818 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
2819 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
2820 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
2822 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
2823 if (tls_type
== tls::TLSOPT_NONE
)
2824 target
->tlsld_got_offset(symtab
, layout
, object
);
2825 else if (tls_type
== tls::TLSOPT_TO_LE
)
2827 // no GOT relocs needed for Local Exec.
2828 if (parameters
->options().emit_relocs())
2830 Output_section
* os
= layout
->tls_segment()->first_section();
2831 gold_assert(os
!= NULL
);
2832 os
->set_needs_symtab_index();
2840 case elfcpp::R_POWERPC_GOT_DTPREL16
:
2841 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
2842 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
2843 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
2845 Output_data_got_powerpc
<size
, big_endian
>* got
2846 = target
->got_section(symtab
, layout
);
2847 got
->add_global_with_rel(gsym
, GOT_TYPE_DTPREL
,
2848 target
->rela_dyn_section(layout
),
2849 elfcpp::R_POWERPC_DTPREL
);
2853 case elfcpp::R_POWERPC_GOT_TPREL16
:
2854 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
2855 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
2856 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
2858 const bool final
= gsym
->final_value_is_known();
2859 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
2860 if (tls_type
== tls::TLSOPT_NONE
)
2862 Output_data_got_powerpc
<size
, big_endian
>* got
2863 = target
->got_section(symtab
, layout
);
2864 got
->add_global_with_rel(gsym
, GOT_TYPE_TPREL
,
2865 target
->rela_dyn_section(layout
),
2866 elfcpp::R_POWERPC_TPREL
);
2868 else if (tls_type
== tls::TLSOPT_TO_LE
)
2870 // no GOT relocs needed for Local Exec.
2878 unsupported_reloc_global(object
, r_type
, gsym
);
2883 // Process relocations for gc.
2885 template<int size
, bool big_endian
>
2887 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
2888 Symbol_table
* symtab
,
2890 Sized_relobj_file
<size
, big_endian
>* object
,
2891 unsigned int data_shndx
,
2893 const unsigned char* prelocs
,
2895 Output_section
* output_section
,
2896 bool needs_special_offset_handling
,
2897 size_t local_symbol_count
,
2898 const unsigned char* plocal_symbols
)
2900 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
2901 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
2903 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
2904 typename
Target_powerpc::Relocatable_size_for_reloc
>(
2913 needs_special_offset_handling
,
2918 // Scan relocations for a section.
2920 template<int size
, bool big_endian
>
2922 Target_powerpc
<size
, big_endian
>::scan_relocs(
2923 Symbol_table
* symtab
,
2925 Sized_relobj_file
<size
, big_endian
>* object
,
2926 unsigned int data_shndx
,
2927 unsigned int sh_type
,
2928 const unsigned char* prelocs
,
2930 Output_section
* output_section
,
2931 bool needs_special_offset_handling
,
2932 size_t local_symbol_count
,
2933 const unsigned char* plocal_symbols
)
2935 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
2936 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
2938 if (sh_type
== elfcpp::SHT_REL
)
2940 gold_error(_("%s: unsupported REL reloc section"),
2941 object
->name().c_str());
2947 static Output_data_space
* sdata
;
2949 // Define _SDA_BASE_ at the start of the .sdata section.
2952 // layout->find_output_section(".sdata") == NULL
2953 sdata
= new Output_data_space(4, "** sdata");
2955 = layout
->add_output_section_data(".sdata", 0,
2957 | elfcpp::SHF_WRITE
,
2958 sdata
, ORDER_SMALL_DATA
, false);
2959 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2960 Symbol_table::PREDEFINED
,
2961 os
, 32768, 0, elfcpp::STT_OBJECT
,
2962 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2967 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
2976 needs_special_offset_handling
,
2981 // Finalize the sections.
2983 template<int size
, bool big_endian
>
2985 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
2987 const Input_objects
*,
2990 // Fill in some more dynamic tags.
2991 const Reloc_section
* rel_plt
= (this->plt_
== NULL
2993 : this->plt_
->rel_plt());
2994 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
2995 this->rela_dyn_
, true, size
== 32);
2997 Output_data_dynamic
* odyn
= layout
->dynamic_data();
3000 if (this->got_
!= NULL
)
3002 this->got_
->finalize_data_size();
3003 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
3004 this->got_
, this->got_
->g_o_t());
3009 if (this->glink_
!= NULL
)
3011 this->glink_
->finalize_data_size();
3012 odyn
->add_section_plus_offset(elfcpp::DT_PPC64_GLINK
,
3014 (this->glink_
->pltresolve()
3015 + this->glink_
->pltresolve_size
- 32));
3019 // Emit any relocs we saved in an attempt to avoid generating COPY
3021 if (this->copy_relocs_
.any_saved_relocs())
3022 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
3025 // Perform a relocation.
3027 template<int size
, bool big_endian
>
3029 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
3030 const Relocate_info
<size
, big_endian
>* relinfo
,
3031 Target_powerpc
* target
,
3034 const elfcpp::Rela
<size
, big_endian
>& rela
,
3035 unsigned int r_type
,
3036 const Sized_symbol
<size
>* gsym
,
3037 const Symbol_value
<size
>* psymval
,
3038 unsigned char* view
,
3040 section_size_type view_size
)
3043 bool is_tls_call
= ((r_type
== elfcpp::R_POWERPC_REL24
3044 || r_type
== elfcpp::R_PPC_PLTREL24
)
3046 && strcmp(gsym
->name(), "__tls_get_addr") == 0);
3047 enum skip_tls last_tls
= this->call_tls_get_addr_
;
3048 this->call_tls_get_addr_
= CALL_NOT_EXPECTED
;
3051 if (last_tls
== CALL_NOT_EXPECTED
)
3052 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3053 _("__tls_get_addr call lacks marker reloc"));
3054 else if (last_tls
== CALL_SKIP
)
3057 else if (last_tls
!= CALL_NOT_EXPECTED
)
3058 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3059 _("missing expected __tls_get_addr call"));
3061 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
3062 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insn
;
3063 const Powerpc_relobj
<size
, big_endian
>* const object
3064 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
3066 bool has_plt_value
= false;
3068 && use_plt_offset
<size
>(gsym
, Scan::get_reference_flags(r_type
)))
3070 const Output_data_glink
<size
, big_endian
>* glink
3071 = target
->glink_section();
3072 unsigned int glink_index
= glink
->find_entry(gsym
, rela
, object
);
3073 value
= glink
->address() + glink_index
* glink
->glink_entry_size();
3074 has_plt_value
= true;
3077 if (r_type
== elfcpp::R_POWERPC_GOT16
3078 || r_type
== elfcpp::R_POWERPC_GOT16_LO
3079 || r_type
== elfcpp::R_POWERPC_GOT16_HI
3080 || r_type
== elfcpp::R_POWERPC_GOT16_HA
3081 || r_type
== elfcpp::R_PPC64_GOT16_DS
3082 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
3086 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
3087 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
3091 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3092 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
3093 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
3095 value
-= target
->got_section()->got_base_offset(object
);
3097 else if (r_type
== elfcpp::R_PPC64_TOC
)
3099 value
= (target
->got_section()->output_section()->address()
3100 + object
->toc_base_offset());
3102 else if (gsym
!= NULL
3103 && (r_type
== elfcpp::R_POWERPC_REL24
3104 || r_type
== elfcpp::R_PPC_PLTREL24
)
3109 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
3110 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
3111 bool can_plt_call
= false;
3112 if (rela
.get_r_offset() + 8 <= view_size
)
3114 Valtype insn2
= elfcpp::Swap
<32, big_endian
>::readval(wv
+ 1);
3116 || insn2
== cror_15_15_15
|| insn2
== cror_31_31_31
)
3118 elfcpp::Swap
<32, big_endian
>::writeval(wv
+ 1, ld_2_1
+ 40);
3119 can_plt_call
= true;
3123 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3124 _("call lacks nop, can't restore toc"));
3127 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
3128 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
3129 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
3130 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
3132 // First instruction of a global dynamic sequence, arg setup insn.
3133 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
3134 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
3135 enum Got_type got_type
= GOT_TYPE_STANDARD
;
3136 if (tls_type
== tls::TLSOPT_NONE
)
3137 got_type
= GOT_TYPE_TLSGD
;
3138 else if (tls_type
== tls::TLSOPT_TO_IE
)
3139 got_type
= GOT_TYPE_TPREL
;
3140 if (got_type
!= GOT_TYPE_STANDARD
)
3144 gold_assert(gsym
->has_got_offset(got_type
));
3145 value
= gsym
->got_offset(got_type
);
3149 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3150 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
3151 value
= object
->local_got_offset(r_sym
, got_type
);
3153 value
-= target
->got_section()->got_base_offset(object
);
3155 if (tls_type
== tls::TLSOPT_TO_IE
)
3157 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
3158 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
3160 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3161 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
3162 insn
&= (1 << 26) - (1 << 16); // extract rt,ra from addi
3164 insn
|= 32 << 26; // lwz
3166 insn
|= 58 << 26; // ld
3167 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3169 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
3170 - elfcpp::R_POWERPC_GOT_TLSGD16
);
3172 else if (tls_type
== tls::TLSOPT_TO_LE
)
3174 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
3175 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
3177 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3178 Insn insn
= addis_3_13
;
3181 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3182 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
3183 value
= psymval
->value(object
, rela
.get_r_addend());
3187 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3189 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3190 r_type
= elfcpp::R_POWERPC_NONE
;
3194 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
3195 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
3196 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
3197 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
3199 // First instruction of a local dynamic sequence, arg setup insn.
3200 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3201 if (tls_type
== tls::TLSOPT_NONE
)
3203 value
= target
->tlsld_got_offset();
3204 value
-= target
->got_section()->got_base_offset(object
);
3208 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
3209 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
3210 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
3212 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3213 Insn insn
= addis_3_13
;
3216 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3217 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
3222 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3224 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3225 r_type
= elfcpp::R_POWERPC_NONE
;
3229 else if (r_type
== elfcpp::R_POWERPC_GOT_DTPREL16
3230 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_LO
3231 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HI
3232 || r_type
== elfcpp::R_POWERPC_GOT_DTPREL16_HA
)
3234 // Accesses relative to a local dynamic sequence address,
3235 // no optimisation here.
3238 gold_assert(gsym
->has_got_offset(GOT_TYPE_DTPREL
));
3239 value
= gsym
->got_offset(GOT_TYPE_DTPREL
);
3243 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3244 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_DTPREL
));
3245 value
= object
->local_got_offset(r_sym
, GOT_TYPE_DTPREL
);
3247 value
-= target
->got_section()->got_base_offset(object
);
3249 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
3250 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
3251 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
3252 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
3254 // First instruction of initial exec sequence.
3255 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
3256 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
3257 if (tls_type
== tls::TLSOPT_NONE
)
3261 gold_assert(gsym
->has_got_offset(GOT_TYPE_TPREL
));
3262 value
= gsym
->got_offset(GOT_TYPE_TPREL
);
3266 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3267 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_TPREL
));
3268 value
= object
->local_got_offset(r_sym
, GOT_TYPE_TPREL
);
3270 value
-= target
->got_section()->got_base_offset(object
);
3274 gold_assert(tls_type
== tls::TLSOPT_TO_LE
);
3275 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
3276 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
3278 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3279 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
3280 insn
&= (1 << 26) - (1 << 21); // extract rt from ld
3285 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3286 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
3287 value
= psymval
->value(object
, rela
.get_r_addend());
3291 Insn
* iview
= reinterpret_cast<Insn
*>(view
- 2 * big_endian
);
3293 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3294 r_type
= elfcpp::R_POWERPC_NONE
;
3298 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
3299 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
3301 // Second instruction of a global dynamic sequence,
3302 // the __tls_get_addr call
3303 this->call_tls_get_addr_
= CALL_EXPECTED
;
3304 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
3305 const tls::Tls_optimization tls_type
= target
->optimize_tls_gd(final
);
3306 if (tls_type
!= tls::TLSOPT_NONE
)
3308 if (tls_type
== tls::TLSOPT_TO_IE
)
3310 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
3311 Insn insn
= add_3_3_13
;
3314 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3315 r_type
= elfcpp::R_POWERPC_NONE
;
3319 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
3320 Insn insn
= addi_3_3
;
3321 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3322 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
3323 view
+= 2 * big_endian
;
3324 value
= psymval
->value(object
, rela
.get_r_addend());
3326 this->call_tls_get_addr_
= CALL_SKIP
;
3329 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
3330 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
3332 // Second instruction of a local dynamic sequence,
3333 // the __tls_get_addr call
3334 this->call_tls_get_addr_
= CALL_EXPECTED
;
3335 const tls::Tls_optimization tls_type
= target
->optimize_tls_ld();
3336 if (tls_type
== tls::TLSOPT_TO_LE
)
3338 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
3339 Insn insn
= addi_3_3
;
3340 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3341 this->call_tls_get_addr_
= CALL_SKIP
;
3342 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
3343 view
+= 2 * big_endian
;
3347 else if (r_type
== elfcpp::R_POWERPC_TLS
)
3349 // Second instruction of an initial exec sequence
3350 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
3351 const tls::Tls_optimization tls_type
= target
->optimize_tls_ie(final
);
3352 if (tls_type
== tls::TLSOPT_TO_LE
)
3354 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
3355 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
3356 unsigned int reg
= size
== 32 ? 2 : 13;
3357 insn
= at_tls_transform(insn
, reg
);
3358 gold_assert(insn
!= 0);
3359 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3360 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
3361 view
+= 2 * big_endian
;
3362 value
= psymval
->value(object
, rela
.get_r_addend());
3368 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
3369 addend
= rela
.get_r_addend();
3370 if (size
== 64 || !has_plt_value
)
3371 value
= psymval
->value(object
, addend
);
3372 if (size
== 64 && is_branch_reloc(r_type
))
3374 // If the symbol is defined in an opd section, ie. is a function
3375 // descriptor, use the function descriptor code entry address
3376 Powerpc_relobj
<size
, big_endian
>* symobj
= const_cast
3377 <Powerpc_relobj
<size
, big_endian
>*>(object
);
3379 symobj
= static_cast
3380 <Powerpc_relobj
<size
, big_endian
>*>(gsym
->object());
3381 unsigned int shndx
= symobj
->opd_shndx();
3382 Address opd_addr
= symobj
->get_output_section_offset(shndx
);
3383 gold_assert(opd_addr
!= invalid_address
);
3384 opd_addr
+= symobj
->output_section(shndx
)->address();
3385 if (value
>= opd_addr
3386 && value
< opd_addr
+ symobj
->section_size(shndx
))
3389 symobj
->get_opd_ent(value
- opd_addr
, &shndx
, &sec_off
);
3390 Address sec_addr
= symobj
->get_output_section_offset(shndx
);
3391 gold_assert(sec_addr
!= invalid_address
);
3392 sec_addr
+= symobj
->output_section(shndx
)->address();
3393 value
= sec_addr
+ sec_off
;
3400 case elfcpp::R_PPC64_REL64
:
3401 case elfcpp::R_POWERPC_REL32
:
3402 case elfcpp::R_POWERPC_REL24
:
3403 case elfcpp::R_PPC_PLTREL24
:
3404 case elfcpp::R_PPC_LOCAL24PC
:
3405 case elfcpp::R_POWERPC_REL16
:
3406 case elfcpp::R_POWERPC_REL16_LO
:
3407 case elfcpp::R_POWERPC_REL16_HI
:
3408 case elfcpp::R_POWERPC_REL16_HA
:
3409 case elfcpp::R_POWERPC_REL14
:
3410 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3411 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3415 case elfcpp::R_PPC64_TOC16
:
3416 case elfcpp::R_PPC64_TOC16_LO
:
3417 case elfcpp::R_PPC64_TOC16_HI
:
3418 case elfcpp::R_PPC64_TOC16_HA
:
3419 case elfcpp::R_PPC64_TOC16_DS
:
3420 case elfcpp::R_PPC64_TOC16_LO_DS
:
3421 // Subtract the TOC base address.
3422 value
-= (target
->got_section()->output_section()->address()
3423 + object
->toc_base_offset());
3426 case elfcpp::R_POWERPC_SECTOFF
:
3427 case elfcpp::R_POWERPC_SECTOFF_LO
:
3428 case elfcpp::R_POWERPC_SECTOFF_HI
:
3429 case elfcpp::R_POWERPC_SECTOFF_HA
:
3430 case elfcpp::R_PPC64_SECTOFF_DS
:
3431 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3433 value
-= os
->address();
3436 case elfcpp::R_PPC64_TPREL16_DS
:
3437 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3439 // R_PPC_TLSGD and R_PPC_TLSLD
3441 case elfcpp::R_POWERPC_TPREL16
:
3442 case elfcpp::R_POWERPC_TPREL16_LO
:
3443 case elfcpp::R_POWERPC_TPREL16_HI
:
3444 case elfcpp::R_POWERPC_TPREL16_HA
:
3445 case elfcpp::R_POWERPC_TPREL
:
3446 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3447 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3448 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3449 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3450 // tls symbol values are relative to tls_segment()->vaddr()
3454 case elfcpp::R_PPC64_DTPREL16_DS
:
3455 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3456 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3457 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3458 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3459 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3461 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
3462 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
3464 case elfcpp::R_POWERPC_DTPREL16
:
3465 case elfcpp::R_POWERPC_DTPREL16_LO
:
3466 case elfcpp::R_POWERPC_DTPREL16_HI
:
3467 case elfcpp::R_POWERPC_DTPREL16_HA
:
3468 case elfcpp::R_POWERPC_DTPREL
:
3469 // tls symbol values are relative to tls_segment()->vaddr()
3470 value
-= dtp_offset
;
3477 Insn branch_bit
= 0;
3480 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3481 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3482 branch_bit
= 1 << 21;
3483 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3484 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3486 Insn
* iview
= reinterpret_cast<Insn
*>(view
);
3487 Insn insn
= elfcpp::Swap
<32, big_endian
>::readval(iview
);
3490 if (this->is_isa_v2
)
3492 // Set 'a' bit. This is 0b00010 in BO field for branch
3493 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
3494 // for branch on CTR insns (BO == 1a00t or 1a01t).
3495 if ((insn
& (0x14 << 21)) == (0x04 << 21))
3497 else if ((insn
& (0x14 << 21)) == (0x10 << 21))
3504 // Invert 'y' bit if not the default.
3505 if (static_cast<Signed_address
>(value
) < 0)
3508 elfcpp::Swap
<32, big_endian
>::writeval(iview
, insn
);
3516 enum Reloc::overflow_check overflow
= Reloc::check_none
;
3519 case elfcpp::R_POWERPC_ADDR32
:
3520 case elfcpp::R_POWERPC_UADDR32
:
3522 overflow
= Reloc::check_bitfield
;
3525 case elfcpp::R_POWERPC_REL32
:
3527 overflow
= Reloc::check_signed
;
3530 case elfcpp::R_POWERPC_ADDR24
:
3531 case elfcpp::R_POWERPC_ADDR16
:
3532 case elfcpp::R_POWERPC_UADDR16
:
3533 case elfcpp::R_PPC64_ADDR16_DS
:
3534 case elfcpp::R_POWERPC_ADDR14
:
3535 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3536 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3537 overflow
= Reloc::check_bitfield
;
3540 case elfcpp::R_POWERPC_REL24
:
3541 case elfcpp::R_PPC_PLTREL24
:
3542 case elfcpp::R_PPC_LOCAL24PC
:
3543 case elfcpp::R_POWERPC_REL16
:
3544 case elfcpp::R_PPC64_TOC16
:
3545 case elfcpp::R_POWERPC_GOT16
:
3546 case elfcpp::R_POWERPC_SECTOFF
:
3547 case elfcpp::R_POWERPC_TPREL16
:
3548 case elfcpp::R_POWERPC_DTPREL16
:
3549 case elfcpp::R_PPC64_TPREL16_DS
:
3550 case elfcpp::R_PPC64_DTPREL16_DS
:
3551 case elfcpp::R_PPC64_TOC16_DS
:
3552 case elfcpp::R_PPC64_GOT16_DS
:
3553 case elfcpp::R_PPC64_SECTOFF_DS
:
3554 case elfcpp::R_POWERPC_REL14
:
3555 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3556 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3557 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3558 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3559 case elfcpp::R_POWERPC_GOT_TPREL16
:
3560 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3561 overflow
= Reloc::check_signed
;
3567 case elfcpp::R_POWERPC_NONE
:
3568 case elfcpp::R_POWERPC_TLS
:
3569 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
3570 case elfcpp::R_POWERPC_GNU_VTENTRY
:
3571 case elfcpp::R_PPC_EMB_MRKREF
:
3574 case elfcpp::R_PPC64_ADDR64
:
3575 case elfcpp::R_PPC64_REL64
:
3576 case elfcpp::R_PPC64_TOC
:
3577 Reloc::addr64(view
, value
);
3580 case elfcpp::R_POWERPC_TPREL
:
3581 case elfcpp::R_POWERPC_DTPREL
:
3583 Reloc::addr64(view
, value
);
3585 Reloc::addr32(view
, value
, overflow
);
3588 case elfcpp::R_PPC64_UADDR64
:
3589 Reloc::addr64_u(view
, value
);
3592 case elfcpp::R_POWERPC_ADDR32
:
3593 case elfcpp::R_POWERPC_REL32
:
3594 Reloc::addr32(view
, value
, overflow
);
3597 case elfcpp::R_POWERPC_UADDR32
:
3598 Reloc::addr32_u(view
, value
, overflow
);
3601 case elfcpp::R_POWERPC_ADDR24
:
3602 case elfcpp::R_POWERPC_REL24
:
3603 case elfcpp::R_PPC_PLTREL24
:
3604 case elfcpp::R_PPC_LOCAL24PC
:
3605 Reloc::addr24(view
, value
, overflow
);
3608 case elfcpp::R_POWERPC_GOT_DTPREL16
:
3609 case elfcpp::R_POWERPC_GOT_DTPREL16_LO
:
3612 Reloc::addr16_ds(view
, value
, overflow
);
3615 case elfcpp::R_POWERPC_ADDR16
:
3616 case elfcpp::R_POWERPC_REL16
:
3617 case elfcpp::R_PPC64_TOC16
:
3618 case elfcpp::R_POWERPC_GOT16
:
3619 case elfcpp::R_POWERPC_SECTOFF
:
3620 case elfcpp::R_POWERPC_TPREL16
:
3621 case elfcpp::R_POWERPC_DTPREL16
:
3622 case elfcpp::R_POWERPC_GOT_TLSGD16
:
3623 case elfcpp::R_POWERPC_GOT_TLSLD16
:
3624 case elfcpp::R_POWERPC_GOT_TPREL16
:
3625 case elfcpp::R_POWERPC_ADDR16_LO
:
3626 case elfcpp::R_POWERPC_REL16_LO
:
3627 case elfcpp::R_PPC64_TOC16_LO
:
3628 case elfcpp::R_POWERPC_GOT16_LO
:
3629 case elfcpp::R_POWERPC_SECTOFF_LO
:
3630 case elfcpp::R_POWERPC_TPREL16_LO
:
3631 case elfcpp::R_POWERPC_DTPREL16_LO
:
3632 case elfcpp::R_POWERPC_GOT_TLSGD16_LO
:
3633 case elfcpp::R_POWERPC_GOT_TLSLD16_LO
:
3634 case elfcpp::R_POWERPC_GOT_TPREL16_LO
:
3635 Reloc::addr16(view
, value
, overflow
);
3638 case elfcpp::R_POWERPC_UADDR16
:
3639 Reloc::addr16_u(view
, value
, overflow
);
3642 case elfcpp::R_POWERPC_ADDR16_HI
:
3643 case elfcpp::R_POWERPC_REL16_HI
:
3644 case elfcpp::R_PPC64_TOC16_HI
:
3645 case elfcpp::R_POWERPC_GOT16_HI
:
3646 case elfcpp::R_POWERPC_SECTOFF_HI
:
3647 case elfcpp::R_POWERPC_TPREL16_HI
:
3648 case elfcpp::R_POWERPC_DTPREL16_HI
:
3649 case elfcpp::R_POWERPC_GOT_TLSGD16_HI
:
3650 case elfcpp::R_POWERPC_GOT_TLSLD16_HI
:
3651 case elfcpp::R_POWERPC_GOT_TPREL16_HI
:
3652 case elfcpp::R_POWERPC_GOT_DTPREL16_HI
:
3653 Reloc::addr16_hi(view
, value
);
3656 case elfcpp::R_POWERPC_ADDR16_HA
:
3657 case elfcpp::R_POWERPC_REL16_HA
:
3658 case elfcpp::R_PPC64_TOC16_HA
:
3659 case elfcpp::R_POWERPC_GOT16_HA
:
3660 case elfcpp::R_POWERPC_SECTOFF_HA
:
3661 case elfcpp::R_POWERPC_TPREL16_HA
:
3662 case elfcpp::R_POWERPC_DTPREL16_HA
:
3663 case elfcpp::R_POWERPC_GOT_TLSGD16_HA
:
3664 case elfcpp::R_POWERPC_GOT_TLSLD16_HA
:
3665 case elfcpp::R_POWERPC_GOT_TPREL16_HA
:
3666 case elfcpp::R_POWERPC_GOT_DTPREL16_HA
:
3667 Reloc::addr16_ha(view
, value
);
3670 case elfcpp::R_PPC64_DTPREL16_HIGHER
:
3672 // R_PPC_EMB_NADDR16_LO
3674 case elfcpp::R_PPC64_ADDR16_HIGHER
:
3675 case elfcpp::R_PPC64_TPREL16_HIGHER
:
3676 Reloc::addr16_hi2(view
, value
);
3679 case elfcpp::R_PPC64_DTPREL16_HIGHERA
:
3681 // R_PPC_EMB_NADDR16_HI
3683 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
3684 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
3685 Reloc::addr16_ha2(view
, value
);
3688 case elfcpp::R_PPC64_DTPREL16_HIGHEST
:
3690 // R_PPC_EMB_NADDR16_HA
3692 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
3693 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
3694 Reloc::addr16_hi3(view
, value
);
3697 case elfcpp::R_PPC64_DTPREL16_HIGHESTA
:
3701 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
3702 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
3703 Reloc::addr16_ha3(view
, value
);
3706 case elfcpp::R_PPC64_DTPREL16_DS
:
3707 case elfcpp::R_PPC64_DTPREL16_LO_DS
:
3709 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
3711 case elfcpp::R_PPC64_TPREL16_DS
:
3712 case elfcpp::R_PPC64_TPREL16_LO_DS
:
3714 // R_PPC_TLSGD, R_PPC_TLSLD
3716 case elfcpp::R_PPC64_ADDR16_DS
:
3717 case elfcpp::R_PPC64_ADDR16_LO_DS
:
3718 case elfcpp::R_PPC64_TOC16_DS
:
3719 case elfcpp::R_PPC64_TOC16_LO_DS
:
3720 case elfcpp::R_PPC64_GOT16_DS
:
3721 case elfcpp::R_PPC64_GOT16_LO_DS
:
3722 case elfcpp::R_PPC64_SECTOFF_DS
:
3723 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
3724 Reloc::addr16_ds(view
, value
, overflow
);
3727 case elfcpp::R_POWERPC_ADDR14
:
3728 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
3729 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
3730 case elfcpp::R_POWERPC_REL14
:
3731 case elfcpp::R_POWERPC_REL14_BRTAKEN
:
3732 case elfcpp::R_POWERPC_REL14_BRNTAKEN
:
3733 Reloc::addr14(view
, value
, overflow
);
3736 case elfcpp::R_POWERPC_COPY
:
3737 case elfcpp::R_POWERPC_GLOB_DAT
:
3738 case elfcpp::R_POWERPC_JMP_SLOT
:
3739 case elfcpp::R_POWERPC_RELATIVE
:
3740 case elfcpp::R_POWERPC_DTPMOD
:
3741 case elfcpp::R_PPC64_JMP_IREL
:
3742 case elfcpp::R_POWERPC_IRELATIVE
:
3743 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3744 _("unexpected reloc %u in object file"),
3748 case elfcpp::R_PPC_EMB_SDA21
:
3753 // R_PPC64_TOCSAVE. For the time being this can be ignored.
3757 case elfcpp::R_PPC_EMB_SDA2I16
:
3758 case elfcpp::R_PPC_EMB_SDA2REL
:
3761 // R_PPC64_TLSGD, R_PPC64_TLSLD
3764 case elfcpp::R_POWERPC_PLT32
:
3765 case elfcpp::R_POWERPC_PLTREL32
:
3766 case elfcpp::R_POWERPC_PLT16_LO
:
3767 case elfcpp::R_POWERPC_PLT16_HI
:
3768 case elfcpp::R_POWERPC_PLT16_HA
:
3769 case elfcpp::R_PPC_SDAREL16
:
3770 case elfcpp::R_POWERPC_ADDR30
:
3771 case elfcpp::R_PPC64_PLT64
:
3772 case elfcpp::R_PPC64_PLTREL64
:
3773 case elfcpp::R_PPC64_PLTGOT16
:
3774 case elfcpp::R_PPC64_PLTGOT16_LO
:
3775 case elfcpp::R_PPC64_PLTGOT16_HI
:
3776 case elfcpp::R_PPC64_PLTGOT16_HA
:
3777 case elfcpp::R_PPC64_PLT16_LO_DS
:
3778 case elfcpp::R_PPC64_PLTGOT16_DS
:
3779 case elfcpp::R_PPC64_PLTGOT16_LO_DS
:
3780 case elfcpp::R_PPC_EMB_RELSEC16
:
3781 case elfcpp::R_PPC_EMB_RELST_LO
:
3782 case elfcpp::R_PPC_EMB_RELST_HI
:
3783 case elfcpp::R_PPC_EMB_RELST_HA
:
3784 case elfcpp::R_PPC_EMB_BIT_FLD
:
3785 case elfcpp::R_PPC_EMB_RELSDA
:
3786 case elfcpp::R_PPC_TOC16
:
3789 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3790 _("unsupported reloc %u"),
3798 // Relocate section data.
3800 template<int size
, bool big_endian
>
3802 Target_powerpc
<size
, big_endian
>::relocate_section(
3803 const Relocate_info
<size
, big_endian
>* relinfo
,
3804 unsigned int sh_type
,
3805 const unsigned char* prelocs
,
3807 Output_section
* output_section
,
3808 bool needs_special_offset_handling
,
3809 unsigned char* view
,
3811 section_size_type view_size
,
3812 const Reloc_symbol_changes
* reloc_symbol_changes
)
3814 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
3815 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
3817 gold_assert(sh_type
== elfcpp::SHT_RELA
);
3819 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
3826 needs_special_offset_handling
,
3830 reloc_symbol_changes
);
3833 class Powerpc_scan_relocatable_reloc
3836 // Return the strategy to use for a local symbol which is not a
3837 // section symbol, given the relocation type.
3838 inline Relocatable_relocs::Reloc_strategy
3839 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
3841 if (r_type
== 0 && r_sym
== 0)
3842 return Relocatable_relocs::RELOC_DISCARD
;
3843 return Relocatable_relocs::RELOC_COPY
;
3846 // Return the strategy to use for a local symbol which is a section
3847 // symbol, given the relocation type.
3848 inline Relocatable_relocs::Reloc_strategy
3849 local_section_strategy(unsigned int, Relobj
*)
3851 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
3854 // Return the strategy to use for a global symbol, given the
3855 // relocation type, the object, and the symbol index.
3856 inline Relocatable_relocs::Reloc_strategy
3857 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
3859 if (r_type
== elfcpp::R_PPC_PLTREL24
)
3860 return Relocatable_relocs::RELOC_SPECIAL
;
3861 return Relocatable_relocs::RELOC_COPY
;
3865 // Scan the relocs during a relocatable link.
3867 template<int size
, bool big_endian
>
3869 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
3870 Symbol_table
* symtab
,
3872 Sized_relobj_file
<size
, big_endian
>* object
,
3873 unsigned int data_shndx
,
3874 unsigned int sh_type
,
3875 const unsigned char* prelocs
,
3877 Output_section
* output_section
,
3878 bool needs_special_offset_handling
,
3879 size_t local_symbol_count
,
3880 const unsigned char* plocal_symbols
,
3881 Relocatable_relocs
* rr
)
3883 gold_assert(sh_type
== elfcpp::SHT_RELA
);
3885 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
3886 Powerpc_scan_relocatable_reloc
>(
3894 needs_special_offset_handling
,
3900 // Emit relocations for a section.
3901 // This is a modified version of the function by the same name in
3902 // target-reloc.h. Using relocate_special_relocatable for
3903 // R_PPC_PLTREL24 would require duplication of the entire body of the
3904 // loop, so we may as well duplicate the whole thing.
3906 template<int size
, bool big_endian
>
3908 Target_powerpc
<size
, big_endian
>::relocate_relocs(
3909 const Relocate_info
<size
, big_endian
>* relinfo
,
3910 unsigned int sh_type
,
3911 const unsigned char* prelocs
,
3913 Output_section
* output_section
,
3914 off_t offset_in_output_section
,
3915 const Relocatable_relocs
* rr
,
3917 Address view_address
,
3919 unsigned char* reloc_view
,
3920 section_size_type reloc_view_size
)
3922 gold_assert(sh_type
== elfcpp::SHT_RELA
);
3924 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
3926 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
3928 const int reloc_size
3929 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
3931 Powerpc_relobj
<size
, big_endian
>* const object
3932 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
3933 const unsigned int local_count
= object
->local_symbol_count();
3934 unsigned int got2_shndx
= object
->got2_shndx();
3935 Address got2_addend
= 0;
3936 if (got2_shndx
!= 0)
3938 got2_addend
= object
->get_output_section_offset(got2_shndx
);
3939 gold_assert(got2_addend
!= invalid_address
);
3942 unsigned char* pwrite
= reloc_view
;
3943 bool zap_next
= false;
3944 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
3946 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
3947 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
3950 Reltype
reloc(prelocs
);
3951 Reltype_write
reloc_write(pwrite
);
3953 Address offset
= reloc
.get_r_offset();
3954 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
3955 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
3956 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
3957 const unsigned int orig_r_sym
= r_sym
;
3958 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
3959 = reloc
.get_r_addend();
3960 const Symbol
* gsym
= NULL
;
3964 // We could arrange to discard these and other relocs for
3965 // tls optimised sequences in the strategy methods, but for
3966 // now do as BFD ld does.
3967 r_type
= elfcpp::R_POWERPC_NONE
;
3971 // Get the new symbol index.
3972 if (r_sym
< local_count
)
3976 case Relocatable_relocs::RELOC_COPY
:
3977 case Relocatable_relocs::RELOC_SPECIAL
:
3980 r_sym
= object
->symtab_index(r_sym
);
3981 gold_assert(r_sym
!= -1U);
3985 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
3987 // We are adjusting a section symbol. We need to find
3988 // the symbol table index of the section symbol for
3989 // the output section corresponding to input section
3990 // in which this symbol is defined.
3991 gold_assert(r_sym
< local_count
);
3993 unsigned int shndx
=
3994 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
3995 gold_assert(is_ordinary
);
3996 Output_section
* os
= object
->output_section(shndx
);
3997 gold_assert(os
!= NULL
);
3998 gold_assert(os
->needs_symtab_index());
3999 r_sym
= os
->symtab_index();
4009 gsym
= object
->global_symbol(r_sym
);
4010 gold_assert(gsym
!= NULL
);
4011 if (gsym
->is_forwarder())
4012 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
4014 gold_assert(gsym
->has_symtab_index());
4015 r_sym
= gsym
->symtab_index();
4018 // Get the new offset--the location in the output section where
4019 // this relocation should be applied.
4020 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
4021 offset
+= offset_in_output_section
;
4024 section_offset_type sot_offset
=
4025 convert_types
<section_offset_type
, Address
>(offset
);
4026 section_offset_type new_sot_offset
=
4027 output_section
->output_offset(object
, relinfo
->data_shndx
,
4029 gold_assert(new_sot_offset
!= -1);
4030 offset
= new_sot_offset
;
4033 // In an object file, r_offset is an offset within the section.
4034 // In an executable or dynamic object, generated by
4035 // --emit-relocs, r_offset is an absolute address.
4036 if (!parameters
->options().relocatable())
4038 offset
+= view_address
;
4039 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
4040 offset
-= offset_in_output_section
;
4043 // Handle the reloc addend based on the strategy.
4044 if (strategy
== Relocatable_relocs::RELOC_COPY
)
4046 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
4048 const Symbol_value
<size
>* psymval
= object
->local_symbol(orig_r_sym
);
4049 addend
= psymval
->value(object
, addend
);
4051 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
4053 if (addend
>= 32768)
4054 addend
+= got2_addend
;
4059 if (!parameters
->options().relocatable())
4061 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4062 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
4063 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HI
4064 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_HA
)
4066 // First instruction of a global dynamic sequence,
4068 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4069 switch (this->optimize_tls_gd(final
))
4071 case tls::TLSOPT_TO_IE
:
4072 r_type
+= (elfcpp::R_POWERPC_GOT_TPREL16
4073 - elfcpp::R_POWERPC_GOT_TLSGD16
);
4075 case tls::TLSOPT_TO_LE
:
4076 if (r_type
== elfcpp::R_POWERPC_GOT_TLSGD16
4077 || r_type
== elfcpp::R_POWERPC_GOT_TLSGD16_LO
)
4078 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4081 r_type
= elfcpp::R_POWERPC_NONE
;
4082 offset
-= 2 * big_endian
;
4089 else if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4090 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
4091 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HI
4092 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_HA
)
4094 // First instruction of a local dynamic sequence,
4096 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
4098 if (r_type
== elfcpp::R_POWERPC_GOT_TLSLD16
4099 || r_type
== elfcpp::R_POWERPC_GOT_TLSLD16_LO
)
4101 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4102 const Output_section
* os
= relinfo
->layout
->tls_segment()
4104 gold_assert(os
!= NULL
);
4105 gold_assert(os
->needs_symtab_index());
4106 r_sym
= os
->symtab_index();
4107 addend
= dtp_offset
;
4111 r_type
= elfcpp::R_POWERPC_NONE
;
4112 offset
-= 2 * big_endian
;
4116 else if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4117 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
4118 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HI
4119 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_HA
)
4121 // First instruction of initial exec sequence.
4122 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4123 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
4125 if (r_type
== elfcpp::R_POWERPC_GOT_TPREL16
4126 || r_type
== elfcpp::R_POWERPC_GOT_TPREL16_LO
)
4127 r_type
= elfcpp::R_POWERPC_TPREL16_HA
;
4130 r_type
= elfcpp::R_POWERPC_NONE
;
4131 offset
-= 2 * big_endian
;
4135 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSGD
)
4136 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSGD
))
4138 // Second instruction of a global dynamic sequence,
4139 // the __tls_get_addr call
4140 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4141 switch (this->optimize_tls_gd(final
))
4143 case tls::TLSOPT_TO_IE
:
4144 r_type
= elfcpp::R_POWERPC_NONE
;
4147 case tls::TLSOPT_TO_LE
:
4148 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4149 offset
+= 2 * big_endian
;
4156 else if ((size
== 64 && r_type
== elfcpp::R_PPC64_TLSLD
)
4157 || (size
== 32 && r_type
== elfcpp::R_PPC_TLSLD
))
4159 // Second instruction of a local dynamic sequence,
4160 // the __tls_get_addr call
4161 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE
)
4163 const Output_section
* os
= relinfo
->layout
->tls_segment()
4165 gold_assert(os
!= NULL
);
4166 gold_assert(os
->needs_symtab_index());
4167 r_sym
= os
->symtab_index();
4168 addend
= dtp_offset
;
4169 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4170 offset
+= 2 * big_endian
;
4174 else if (r_type
== elfcpp::R_POWERPC_TLS
)
4176 // Second instruction of an initial exec sequence
4177 const bool final
= gsym
== NULL
|| gsym
->final_value_is_known();
4178 if (this->optimize_tls_ie(final
) == tls::TLSOPT_TO_LE
)
4180 r_type
= elfcpp::R_POWERPC_TPREL16_LO
;
4181 offset
+= 2 * big_endian
;
4186 reloc_write
.put_r_offset(offset
);
4187 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(r_sym
, r_type
));
4188 reloc_write
.put_r_addend(addend
);
4190 pwrite
+= reloc_size
;
4193 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
4194 == reloc_view_size
);
4197 // Return the value to use for a dynamic which requires special
4198 // treatment. This is how we support equality comparisons of function
4199 // pointers across shared library boundaries, as described in the
4200 // processor specific ABI supplement.
4202 template<int size
, bool big_endian
>
4204 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
4208 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
4209 return this->plt_section()->address() + gsym
->plt_offset();
4215 // The selector for powerpc object files.
4217 template<int size
, bool big_endian
>
4218 class Target_selector_powerpc
: public Target_selector
4221 Target_selector_powerpc()
4222 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
4224 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
4225 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
4227 ? (big_endian
? "elf64ppc" : "elf64lppc")
4228 : (big_endian
? "elf32ppc" : "elf32lppc")))
4232 do_recognize(Input_file
*, off_t
, int machine
, int, int)
4237 if (machine
!= elfcpp::EM_PPC64
)
4242 if (machine
!= elfcpp::EM_PPC
)
4250 return this->instantiate_target();
4254 do_instantiate_target()
4255 { return new Target_powerpc
<size
, big_endian
>(); }
4258 Target_selector_powerpc
<32, true> target_selector_ppc32
;
4259 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
4260 Target_selector_powerpc
<64, true> target_selector_ppc64
;
4261 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
4263 } // End anonymous namespace.