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 Powerpc_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
61 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
62 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
73 return this->got2_section_
;
79 do_find_special_sections(Read_symbols_data
* sd
);
82 unsigned int got2_section_
;
85 template<int size
, bool big_endian
>
86 class Target_powerpc
: public Sized_target
<size
, big_endian
>
90 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
93 : Sized_target
<size
, big_endian
>(&powerpc_info
),
94 got_(NULL
), plt_(NULL
), glink_(NULL
), rela_dyn_(NULL
),
95 copy_relocs_(elfcpp::R_POWERPC_COPY
),
96 dynbss_(NULL
), got_mod_index_offset_(-1U)
100 // Process the relocations to determine unreferenced sections for
101 // garbage collection.
103 gc_process_relocs(Symbol_table
* symtab
,
105 Sized_relobj_file
<size
, big_endian
>* object
,
106 unsigned int data_shndx
,
107 unsigned int sh_type
,
108 const unsigned char* prelocs
,
110 Output_section
* output_section
,
111 bool needs_special_offset_handling
,
112 size_t local_symbol_count
,
113 const unsigned char* plocal_symbols
);
115 // Scan the relocations to look for symbol adjustments.
117 scan_relocs(Symbol_table
* symtab
,
119 Sized_relobj_file
<size
, big_endian
>* object
,
120 unsigned int data_shndx
,
121 unsigned int sh_type
,
122 const unsigned char* prelocs
,
124 Output_section
* output_section
,
125 bool needs_special_offset_handling
,
126 size_t local_symbol_count
,
127 const unsigned char* plocal_symbols
);
128 // Finalize the sections.
130 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
132 // Return the value to use for a dynamic which requires special
135 do_dynsym_value(const Symbol
*) const;
137 // Relocate a section.
139 relocate_section(const Relocate_info
<size
, big_endian
>*,
140 unsigned int sh_type
,
141 const unsigned char* prelocs
,
143 Output_section
* output_section
,
144 bool needs_special_offset_handling
,
146 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
147 section_size_type view_size
,
148 const Reloc_symbol_changes
*);
150 // Scan the relocs during a relocatable link.
152 scan_relocatable_relocs(Symbol_table
* symtab
,
154 Sized_relobj_file
<size
, big_endian
>* object
,
155 unsigned int data_shndx
,
156 unsigned int sh_type
,
157 const unsigned char* prelocs
,
159 Output_section
* output_section
,
160 bool needs_special_offset_handling
,
161 size_t local_symbol_count
,
162 const unsigned char* plocal_symbols
,
163 Relocatable_relocs
*);
165 // Relocate a section during a relocatable link.
167 relocate_for_relocatable(const Relocate_info
<size
, big_endian
>*,
168 unsigned int sh_type
,
169 const unsigned char* prelocs
,
171 Output_section
* output_section
,
172 off_t offset_in_output_section
,
173 const Relocatable_relocs
*,
175 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
177 unsigned char* reloc_view
,
178 section_size_type reloc_view_size
);
180 // Return whether SYM is defined by the ABI.
182 do_is_defined_by_abi(const Symbol
* sym
) const
184 return strcmp(sym
->name(), "__tls_get_addr") == 0;
187 // Return the size of the GOT section.
191 gold_assert(this->got_
!= NULL
);
192 return this->got_
->data_size();
195 // Get the PLT section.
196 const Output_data_plt_powerpc
<size
, big_endian
>*
199 gold_assert(this->plt_
!= NULL
);
203 // Get the .glink section.
204 const Output_data_glink
<size
, big_endian
>*
205 glink_section() const
207 gold_assert(this->glink_
!= NULL
);
211 // Get the GOT section.
212 const Output_data_got_powerpc
<size
, big_endian
>*
215 gold_assert(this->got_
!= NULL
);
221 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
222 const elfcpp::Ehdr
<size
, big_endian
>&);
224 // Return the number of entries in the GOT.
226 got_entry_count() const
228 if (this->got_
== NULL
)
230 return this->got_size() / (size
/ 8);
233 // Return the number of entries in the PLT.
235 plt_entry_count() const;
237 // Return the offset of the first non-reserved PLT entry.
239 first_plt_entry_offset() const;
241 // Return the size of each PLT entry.
243 plt_entry_size() const;
247 // The class which scans relocations.
252 : issued_non_pic_error_(false)
256 get_reference_flags(unsigned int r_type
);
259 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
260 Sized_relobj_file
<size
, big_endian
>* object
,
261 unsigned int data_shndx
,
262 Output_section
* output_section
,
263 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
264 const elfcpp::Sym
<size
, big_endian
>& lsym
);
267 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
268 Sized_relobj_file
<size
, big_endian
>* object
,
269 unsigned int data_shndx
,
270 Output_section
* output_section
,
271 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
275 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
277 Sized_relobj_file
<size
, big_endian
>* ,
280 const elfcpp::Rela
<size
, big_endian
>& ,
282 const elfcpp::Sym
<size
, big_endian
>&)
286 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
288 Sized_relobj_file
<size
, big_endian
>* ,
291 const elfcpp::Rela
<size
,
293 unsigned int , Symbol
*)
298 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
299 unsigned int r_type
);
302 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
303 unsigned int r_type
, Symbol
*);
306 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
307 Target_powerpc
* target
);
310 check_non_pic(Relobj
*, unsigned int r_type
);
312 // Whether we have issued an error about a non-PIC compilation.
313 bool issued_non_pic_error_
;
316 // The class which implements relocation.
320 // Do a relocation. Return false if the caller should not issue
321 // any warnings about this relocation.
323 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
324 Output_section
*, size_t relnum
,
325 const elfcpp::Rela
<size
, big_endian
>&,
326 unsigned int r_type
, const Sized_symbol
<size
>*,
327 const Symbol_value
<size
>*,
329 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
333 // Do a TLS relocation.
335 relocate_tls(const Relocate_info
<size
, big_endian
>*,
336 Target_powerpc
* target
,
337 size_t relnum
, const elfcpp::Rela
<size
, big_endian
>&,
338 unsigned int r_type
, const Sized_symbol
<size
>*,
339 const Symbol_value
<size
>*,
341 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
345 // A class which returns the size required for a relocation type,
346 // used while scanning relocs during a relocatable link.
347 class Relocatable_size_for_reloc
351 get_size_for_reloc(unsigned int, Relobj
*)
358 // Adjust TLS relocation type based on the options and whether this
359 // is a local symbol.
360 static tls::Tls_optimization
361 optimize_tls_reloc(bool is_final
, int r_type
);
363 // Get the GOT section, creating it if necessary.
364 Output_data_got_powerpc
<size
, big_endian
>*
365 got_section(Symbol_table
*, Layout
*);
369 make_glink_section(Layout
*);
371 // Create the PLT section.
373 make_plt_section(Layout
*);
375 // Create a PLT entry for a global symbol.
377 make_plt_entry(Layout
*, Symbol
*,
378 const elfcpp::Rela
<size
, big_endian
>&,
379 const Sized_relobj
<size
, big_endian
>* object
);
381 // Create a GOT entry for the TLS module index.
383 got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
384 Sized_relobj_file
<size
, big_endian
>* object
);
386 // Get the dynamic reloc section, creating it if necessary.
388 rela_dyn_section(Layout
*);
390 // Copy a relocation against a global symbol.
392 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
393 Sized_relobj_file
<size
, big_endian
>* object
,
394 unsigned int shndx
, Output_section
* output_section
,
395 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
397 this->copy_relocs_
.copy_reloc(symtab
, layout
,
398 symtab
->get_sized_symbol
<size
>(sym
),
399 object
, shndx
, output_section
,
400 reloc
, this->rela_dyn_section(layout
));
403 // Information about this specific target which we pass to the
404 // general Target structure.
405 static Target::Target_info powerpc_info
;
407 // The types of GOT entries needed for this platform.
408 // These values are exposed to the ABI in an incremental link.
409 // Do not renumber existing values without changing the version
410 // number of the .gnu_incremental_inputs section.
413 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
414 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
415 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
418 // The GOT output section.
419 Output_data_got_powerpc
<size
, big_endian
>* got_
;
420 // The PLT output section.
421 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
422 // The .glink output section.
423 Output_data_glink
<size
, big_endian
>* glink_
;
424 // The dynamic reloc output section.
425 Reloc_section
* rela_dyn_
;
426 // Relocs saved to avoid a COPY reloc.
427 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
428 // Space for variables copied with a COPY reloc.
429 Output_data_space
* dynbss_
;
430 // Offset of the GOT entry for the TLS module index;
431 unsigned int got_mod_index_offset_
;
435 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
438 true, // is_big_endian
439 elfcpp::EM_PPC
, // machine_code
440 false, // has_make_symbol
441 false, // has_resolve
442 false, // has_code_fill
443 true, // is_default_stack_executable
444 false, // can_icf_inline_merge_sections
446 "/usr/lib/ld.so.1", // dynamic_linker
447 0x10000000, // default_text_segment_address
448 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
449 4 * 1024, // common_pagesize (overridable by -z common-page-size)
450 false, // isolate_execinstr
452 elfcpp::SHN_UNDEF
, // small_common_shndx
453 elfcpp::SHN_UNDEF
, // large_common_shndx
454 0, // small_common_section_flags
455 0, // large_common_section_flags
456 NULL
, // attributes_section
457 NULL
// attributes_vendor
461 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
464 false, // is_big_endian
465 elfcpp::EM_PPC
, // machine_code
466 false, // has_make_symbol
467 false, // has_resolve
468 false, // has_code_fill
469 true, // is_default_stack_executable
470 false, // can_icf_inline_merge_sections
472 "/usr/lib/ld.so.1", // dynamic_linker
473 0x10000000, // default_text_segment_address
474 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
475 4 * 1024, // common_pagesize (overridable by -z common-page-size)
476 false, // isolate_execinstr
478 elfcpp::SHN_UNDEF
, // small_common_shndx
479 elfcpp::SHN_UNDEF
, // large_common_shndx
480 0, // small_common_section_flags
481 0, // large_common_section_flags
482 NULL
, // attributes_section
483 NULL
// attributes_vendor
487 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
490 true, // is_big_endian
491 elfcpp::EM_PPC64
, // machine_code
492 false, // has_make_symbol
493 false, // has_resolve
494 false, // has_code_fill
495 true, // is_default_stack_executable
496 false, // can_icf_inline_merge_sections
498 "/usr/lib/ld.so.1", // dynamic_linker
499 0x10000000, // default_text_segment_address
500 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
501 8 * 1024, // common_pagesize (overridable by -z common-page-size)
502 false, // isolate_execinstr
504 elfcpp::SHN_UNDEF
, // small_common_shndx
505 elfcpp::SHN_UNDEF
, // large_common_shndx
506 0, // small_common_section_flags
507 0, // large_common_section_flags
508 NULL
, // attributes_section
509 NULL
// attributes_vendor
513 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
516 false, // is_big_endian
517 elfcpp::EM_PPC64
, // machine_code
518 false, // has_make_symbol
519 false, // has_resolve
520 false, // has_code_fill
521 true, // is_default_stack_executable
522 false, // can_icf_inline_merge_sections
524 "/usr/lib/ld.so.1", // dynamic_linker
525 0x10000000, // default_text_segment_address
526 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
527 8 * 1024, // common_pagesize (overridable by -z common-page-size)
528 false, // isolate_execinstr
530 elfcpp::SHN_UNDEF
, // small_common_shndx
531 elfcpp::SHN_UNDEF
, // large_common_shndx
532 0, // small_common_section_flags
533 0, // large_common_section_flags
534 NULL
, // attributes_section
535 NULL
// attributes_vendor
538 template<int size
, bool big_endian
>
539 class Powerpc_relocate_functions
542 // Do a simple RELA relocation
543 template<int valsize
>
545 rela(unsigned char* view
,
546 unsigned int right_shift
,
547 elfcpp::Elf_Xword dst_mask
,
548 typename
elfcpp::Swap
<size
, big_endian
>::Valtype value
,
549 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
551 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
552 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
553 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
554 Valtype reloc
= (value
+ addend
) >> right_shift
;
559 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
562 // Do a simple RELA relocation, unaligned.
563 template<int valsize
>
565 rela_ua(unsigned char* view
,
566 unsigned int right_shift
,
567 elfcpp::Elf_Xword dst_mask
,
568 typename
elfcpp::Swap
<size
, big_endian
>::Valtype value
,
569 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
571 typedef typename
elfcpp::Swap_unaligned
<valsize
,
572 big_endian
>::Valtype Valtype
;
573 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
574 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
575 Valtype reloc
= (value
+ addend
) >> right_shift
;
580 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
583 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
584 typedef Relocate_functions
<size
, big_endian
> This_reloc
;
586 // R_POWERPC_REL32: (Symbol + Addend - Address)
588 rel32(unsigned char* view
,
589 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
590 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
591 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
592 { This_reloc::pcrela32(view
, value
, addend
, address
); }
594 // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
596 rel24(unsigned char* view
,
597 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
598 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
599 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
601 This::template rela
<32>(view
, 0, 0x03fffffc, value
- address
, addend
);
604 // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
606 rel14(unsigned char* view
,
607 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
608 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
609 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
611 This::template rela
<32>(view
, 0, 0xfffc, value
- address
, addend
);
614 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
616 addr16(unsigned char* view
,
617 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
618 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
619 { This_reloc::rela16(view
, value
, addend
); }
621 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
623 addr16_ds(unsigned char* view
,
624 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
625 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
627 This::template rela
<16>(view
, 0, 0xfffc, value
, addend
);
630 // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
632 addr16_lo(unsigned char* view
,
633 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
634 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
635 { This_reloc::rela16(view
, value
, addend
); }
637 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
639 addr16_hi(unsigned char* view
,
640 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
641 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
643 This::template rela
<16>(view
, 16, 0xffff, value
, addend
);
646 // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
647 // final value of the low 16 bits of the
648 // relocation is negative, add one.
650 addr16_ha(unsigned char* view
,
651 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
652 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
654 This::addr16_hi(view
, value
+ 0x8000, addend
);
657 // R_POWERPC_REL16: (Symbol + Addend - Address) & 0xffff
659 rel16(unsigned char* view
,
660 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
661 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
662 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
663 { This_reloc::pcrela16(view
, value
, addend
, address
); }
665 // R_POWERPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
667 rel16_lo(unsigned char* view
,
668 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
669 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
670 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
671 { This_reloc::pcrela16(view
, value
, addend
, address
); }
673 // R_POWERPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
675 rel16_hi(unsigned char* view
,
676 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
677 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
678 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
680 This::template rela
<16>(view
, 16, 0xffff, value
- address
, addend
);
683 // R_POWERPC_REL16_HA: Same as R_POWERPC_REL16_HI except that if the
684 // final value of the low 16 bits of the
685 // relocation is negative, add one.
687 rel16_ha(unsigned char* view
,
688 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
689 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
690 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
692 This::rel16_hi(view
, value
+ 0x8000, addend
, address
);
696 // Stash away the index of .got2 in a relocatable object, if such
699 template<int size
, bool big_endian
>
701 Powerpc_relobj
<size
, big_endian
>::do_find_special_sections(
702 Read_symbols_data
* sd
)
706 const unsigned char* const pshdrs
= sd
->section_headers
->data();
707 const unsigned char* namesu
= sd
->section_names
->data();
708 const char* names
= reinterpret_cast<const char*>(namesu
);
709 section_size_type names_size
= sd
->section_names_size
;
710 const unsigned char* s
;
712 s
= this->find_shdr(pshdrs
, ".got2", names
, names_size
, NULL
);
715 unsigned int ndx
= (s
- pshdrs
) / elfcpp::Elf_sizes
<size
>::shdr_size
;
716 this->got2_section_
= ndx
;
719 return Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(sd
);
722 // Set up PowerPC target specific relobj.
724 template<int size
, bool big_endian
>
726 Target_powerpc
<size
, big_endian
>::do_make_elf_object(
727 const std::string
& name
,
728 Input_file
* input_file
,
729 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
731 int et
= ehdr
.get_e_type();
732 if (et
== elfcpp::ET_REL
)
734 Powerpc_relobj
<size
, big_endian
>* obj
=
735 new Powerpc_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
739 else if (et
== elfcpp::ET_DYN
)
741 Sized_dynobj
<size
, big_endian
>* obj
=
742 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
748 gold_error(_("%s: unsupported ELF file type %d"),
754 template<int size
, bool big_endian
>
755 class Output_data_got_powerpc
: public Output_data_got
<size
, big_endian
>
758 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
759 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Rela_dyn
;
761 Output_data_got_powerpc(Symbol_table
* symtab
, Layout
* layout
)
762 : Output_data_got
<size
, big_endian
>(),
763 symtab_(symtab
), layout_(layout
),
764 header_ent_cnt_(size
== 32 ? 3 : 1),
765 header_index_(size
== 32 ? 0x2000 : 0)
770 // Create a new GOT entry and return its offset.
772 add_got_entry(Got_entry got_entry
)
775 return Output_data_got
<size
, big_endian
>::add_got_entry(got_entry
);
778 // Create a pair of new GOT entries and return the offset of the first.
780 add_got_entry_pair(Got_entry got_entry_1
, Got_entry got_entry_2
)
782 this->reserve_ent(2);
783 return Output_data_got
<size
, big_endian
>::add_got_entry_pair(got_entry_1
,
787 // Value of _GLOBAL_OFFSET_TABLE_
791 return this->got_offset(this->header_index_
);
794 // Ensure our GOT has a header.
796 set_final_data_size()
798 if (this->header_ent_cnt_
!= 0)
800 Output_data_got
<size
, big_endian
>::set_final_data_size();
803 // First word of GOT header needs some values that are not
804 // handled by Output_data_got so poke them in here.
805 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
807 do_write(Output_file
* of
)
809 this->replace_constant(this->header_index_
,
811 ? this->layout_
->dynamic_section()->address()
812 : this->address() + 0x8000));
814 Output_data_got
<size
, big_endian
>::do_write(of
);
819 reserve_ent(unsigned int cnt
= 1)
821 if (this->header_ent_cnt_
== 0)
823 if (this->num_entries() + cnt
> this->header_index_
)
830 this->header_ent_cnt_
= 0;
831 this->header_index_
= this->num_entries();
834 Output_data_got
<size
, big_endian
>::add_constant(0);
835 Output_data_got
<size
, big_endian
>::add_constant(0);
836 Output_data_got
<size
, big_endian
>::add_constant(0);
838 // Define _GLOBAL_OFFSET_TABLE_ at the header
839 this->symtab_
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
840 Symbol_table::PREDEFINED
,
841 this, this->g_o_t(), 0,
848 Output_data_got
<size
, big_endian
>::add_constant(0);
852 Symbol_table
* symtab_
;
856 unsigned int header_ent_cnt_
;
858 unsigned int header_index_
;
861 // Get the GOT section, creating it if necessary.
863 template<int size
, bool big_endian
>
864 Output_data_got_powerpc
<size
, big_endian
>*
865 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
868 if (this->got_
== NULL
)
870 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
873 = new Output_data_got_powerpc
<size
, big_endian
>(symtab
, layout
);
875 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
876 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
877 this->got_
, ORDER_DATA
, false);
883 // Get the dynamic reloc section, creating it if necessary.
885 template<int size
, bool big_endian
>
886 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
887 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
889 if (this->rela_dyn_
== NULL
)
891 gold_assert(layout
!= NULL
);
892 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
893 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
894 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
895 ORDER_DYNAMIC_RELOCS
, false);
897 return this->rela_dyn_
;
900 // A class to handle the PLT data.
902 template<int size
, bool big_endian
>
903 class Output_data_plt_powerpc
: public Output_section_data_build
906 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
907 size
, big_endian
> Reloc_section
;
909 Output_data_plt_powerpc(Layout
*, Target_powerpc
<size
, big_endian
>*);
911 // Add an entry to the PLT.
915 // Return the .rela.plt section data.
922 // Return the number of PLT entries.
926 return ((this->current_data_size() - initial_plt_entry_size
)
930 // Return the offset of the first non-reserved PLT entry.
932 first_plt_entry_offset()
933 { return initial_plt_entry_size
; }
935 // Return the size of a PLT entry.
938 { return plt_entry_size
; }
942 do_adjust_output_section(Output_section
* os
)
947 // Write to a map file.
949 do_print_to_mapfile(Mapfile
* mapfile
) const
950 { mapfile
->print_output_data(this, _("** PLT")); }
953 // The size of an entry in the PLT.
954 static const int plt_entry_size
= size
== 32 ? 4 : 24;
955 // The size of the first reserved entry.
956 static const int initial_plt_entry_size
= size
== 32 ? 0 : 24;
958 // Write out the PLT data.
960 do_write(Output_file
*);
962 // The reloc section.
964 // Allows access to .glink for do_write.
965 Target_powerpc
<size
, big_endian
>* targ_
;
968 // Create the PLT section.
970 template<int size
, bool big_endian
>
971 Output_data_plt_powerpc
<size
, big_endian
>::Output_data_plt_powerpc(
973 Target_powerpc
<size
, big_endian
>* targ
)
974 : Output_section_data_build(size
== 32 ? 4 : 8),
977 this->rel_
= new Reloc_section(false);
978 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
979 elfcpp::SHF_ALLOC
, this->rel_
,
980 ORDER_DYNAMIC_PLT_RELOCS
, false);
983 // Add an entry to the PLT.
985 template<int size
, bool big_endian
>
987 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
989 if (!gsym
->has_plt_offset())
991 off_t off
= this->current_data_size();
994 off
+= initial_plt_entry_size
;
995 gsym
->set_plt_offset(off
);
996 gsym
->set_needs_dynsym_entry();
997 this->rel_
->add_global(gsym
, elfcpp::R_POWERPC_JMP_SLOT
, this, off
, 0);
998 off
+= plt_entry_size
;
999 this->set_current_data_size(off
);
1003 static const uint32_t addis_11_11
= 0x3d6b0000;
1004 static const uint32_t addis_11_30
= 0x3d7e0000;
1005 static const uint32_t addis_12_12
= 0x3d8c0000;
1006 static const uint32_t addi_11_11
= 0x396b0000;
1007 static const uint32_t add_0_11_11
= 0x7c0b5a14;
1008 static const uint32_t add_11_0_11
= 0x7d605a14;
1009 static const uint32_t b
= 0x48000000;
1010 static const uint32_t bcl_20_31
= 0x429f0005;
1011 static const uint32_t bctr
= 0x4e800420;
1012 static const uint32_t blrl
= 0x4e800021;
1013 static const uint32_t lis_11
= 0x3d600000;
1014 static const uint32_t lis_12
= 0x3d800000;
1015 static const uint32_t lwzu_0_12
= 0x840c0000;
1016 static const uint32_t lwz_0_12
= 0x800c0000;
1017 static const uint32_t lwz_11_11
= 0x816b0000;
1018 static const uint32_t lwz_11_30
= 0x817e0000;
1019 static const uint32_t lwz_12_12
= 0x818c0000;
1020 static const uint32_t mflr_0
= 0x7c0802a6;
1021 static const uint32_t mflr_12
= 0x7d8802a6;
1022 static const uint32_t mtctr_0
= 0x7c0903a6;
1023 static const uint32_t mtctr_11
= 0x7d6903a6;
1024 static const uint32_t mtlr_0
= 0x7c0803a6;
1025 static const uint32_t nop
= 0x60000000;
1026 static const uint32_t sub_11_11_12
= 0x7d6c5850;
1027 static const uint32_t addis_12_2
= 0x3d820000;
1028 static const uint32_t std_2_1
= 0xf8410000;
1029 static const uint32_t ld_11_12
= 0xe96c0000;
1030 static const uint32_t ld_2_12
= 0xe84c0000;
1031 static const uint32_t addi_12_12
= 0x398c0000;
1032 static const uint32_t ld_11_2
= 0xe9620000;
1033 static const uint32_t addi_2_2
= 0x38420000;
1034 static const uint32_t ld_2_2
= 0xe8420000;
1035 static const uint32_t mflr_11
= 0x7d6802a6;
1036 static const uint32_t ld_2_11
= 0xe84b0000;
1037 static const uint32_t mtlr_12
= 0x7d8803a6;
1038 static const uint32_t add_12_2_11
= 0x7d825a14;
1039 static const uint32_t li_0_0
= 0x38000000;
1040 static const uint32_t lis_0_0
= 0x3c000000;
1041 static const uint32_t ori_0_0_0
= 0x60000000;
1043 // Write out the PLT.
1045 template<int size
, bool big_endian
>
1047 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
1051 const off_t offset
= this->offset();
1052 const section_size_type oview_size
1053 = convert_to_section_size_type(this->data_size());
1054 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1055 unsigned char* pov
= oview
;
1056 unsigned char* endpov
= oview
+ oview_size
;
1058 // The address the .glink branch table
1059 const Output_data_glink
<size
, big_endian
>* glink
1060 = this->targ_
->glink_section();
1061 elfcpp::Elf_types
<32>::Elf_Addr branch_tab
1062 = glink
->address() + glink
->pltresolve();
1064 while (pov
< endpov
)
1066 elfcpp::Swap
<32, big_endian
>::writeval(pov
, branch_tab
);
1071 of
->write_output_view(offset
, oview_size
, oview
);
1075 // Create the PLT section.
1077 template<int size
, bool big_endian
>
1079 Target_powerpc
<size
, big_endian
>::make_plt_section(Layout
* layout
)
1081 if (this->plt_
== NULL
)
1083 if (this->glink_
== NULL
)
1084 make_glink_section(layout
);
1086 // Ensure that .rela.dyn always appears before .rela.plt This is
1087 // necessary due to how, on PowerPC and some other targets, .rela.dyn
1088 // needs to include .rela.plt in it's range.
1089 this->rela_dyn_section(layout
);
1091 this->plt_
= new Output_data_plt_powerpc
<size
, big_endian
>(layout
, this);
1092 layout
->add_output_section_data(".plt",
1094 ? elfcpp::SHT_PROGBITS
1095 : elfcpp::SHT_NOBITS
),
1096 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1105 // A class to handle .glink.
1107 template<int size
, bool big_endian
>
1108 class Output_data_glink
: public Output_section_data
1111 Output_data_glink(Target_powerpc
<size
, big_endian
>*);
1115 add_entry(const Symbol
*, const elfcpp::Rela
<size
, big_endian
>&,
1116 const Sized_relobj
<size
, big_endian
>*);
1119 find_entry(const Symbol
*, const elfcpp::Rela
<size
, big_endian
>&,
1120 const Sized_relobj
<size
, big_endian
>*) const;
1123 glink_entry_size() const
1128 // FIXME: We should be using multiple glink sections for
1129 // stubs to support > 33M applications.
1136 return this->pltresolve_
;
1140 // Write to a map file.
1142 do_print_to_mapfile(Mapfile
* mapfile
) const
1143 { mapfile
->print_output_data(this, _("** glink")); }
1146 static const int pltresolve_size
= 16*4;
1149 set_final_data_size();
1153 do_write(Output_file
*);
1158 Glink_sym_ent(const Symbol
* sym
,
1159 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1160 const Sized_relobj
<size
, big_endian
>* object
)
1161 : sym_(sym
), object_(0), addend_(0)
1164 this->addend_
= reloc
.get_r_addend();
1165 else if (parameters
->options().output_is_position_independent()
1166 && (elfcpp::elf_r_type
<size
>(reloc
.get_r_info())
1167 == elfcpp::R_PPC_PLTREL24
))
1169 this->addend_
= reloc
.get_r_addend();
1170 if (this->addend_
!= 0)
1171 this->object_
= object
;
1176 const Sized_relobj
<size
, big_endian
>* object_
;
1177 unsigned int addend_
;
1179 bool operator==(const Glink_sym_ent
& that
) const
1181 return (this->sym_
== that
.sym_
1182 && this->object_
== that
.object_
1183 && this->addend_
== that
.addend_
);
1187 class Glink_sym_ent_hash
1190 size_t operator()(const Glink_sym_ent
& ent
) const
1192 return (reinterpret_cast<uintptr_t>(ent
.sym_
)
1193 ^ reinterpret_cast<uintptr_t>(ent
.object_
)
1198 // Map sym/object/addend to index.
1199 typedef Unordered_map
<Glink_sym_ent
, unsigned int,
1200 Glink_sym_ent_hash
> Glink_entries
;
1201 Glink_entries glink_entries_
;
1203 // Offset of pltresolve stub (actually, branch table for 32-bit)
1206 // Allows access to .got and .plt for do_write.
1207 Target_powerpc
<size
, big_endian
>* targ_
;
1210 // Create the glink section.
1212 template<int size
, bool big_endian
>
1213 Output_data_glink
<size
, big_endian
>::Output_data_glink(
1214 Target_powerpc
<size
, big_endian
>* targ
)
1215 : Output_section_data(16),
1216 pltresolve_(0), targ_(targ
)
1220 // Add an entry to glink, if we do not already have one for this
1221 // sym/object/addend combo.
1223 template<int size
, bool big_endian
>
1225 Output_data_glink
<size
, big_endian
>::add_entry(
1227 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1228 const Sized_relobj
<size
, big_endian
>* object
)
1230 Glink_sym_ent
ent(gsym
, reloc
, object
);
1231 unsigned int indx
= this->glink_entries_
.size();
1232 this->glink_entries_
.insert(std::make_pair(ent
, indx
));
1235 template<int size
, bool big_endian
>
1237 Output_data_glink
<size
, big_endian
>::find_entry(
1239 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1240 const Sized_relobj
<size
, big_endian
>* object
) const
1242 Glink_sym_ent
ent(gsym
, reloc
, object
);
1243 typename
Glink_entries::const_iterator p
= this->glink_entries_
.find(ent
);
1244 gold_assert(p
!= this->glink_entries_
.end());
1248 template<int size
, bool big_endian
>
1250 Output_data_glink
<size
, big_endian
>::set_final_data_size()
1252 unsigned int count
= this->glink_entries_
.size();
1253 off_t total
= count
;
1260 this->pltresolve_
= total
;
1262 // space for branch table
1263 total
+= 4 * (count
- 1);
1265 total
+= -total
& 15;
1266 total
+= this->pltresolve_size
;
1271 this->pltresolve_
= total
;
1272 total
+= this->pltresolve_size
;
1274 // space for branch table
1277 total
+= 4 * (count
- 0x8000);
1281 this->set_data_size(total
);
1284 static inline uint32_t
1290 static inline uint32_t
1296 static inline uint32_t
1299 return hi(a
+ 0x8000);
1302 template<bool big_endian
>
1304 write_insn(unsigned char *p
, uint32_t v
)
1306 elfcpp::Swap
<32, big_endian
>::writeval(p
, v
);
1309 // Write out .glink.
1311 template<int size
, bool big_endian
>
1313 Output_data_glink
<size
, big_endian
>::do_write(Output_file
* of
)
1315 const off_t off
= this->offset();
1316 const section_size_type oview_size
=
1317 convert_to_section_size_type(this->data_size());
1318 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1321 // The base address of the .plt section.
1322 uint32_t plt_base
= this->targ_
->plt_section()->address();
1324 // The address of _GLOBAL_OFFSET_TABLE_.
1325 const Output_data_got_powerpc
<size
, big_endian
> *got
;
1326 typename
elfcpp::Elf_types
<size
>::Elf_Addr g_o_t
;
1327 got
= this->targ_
->got_section();
1328 g_o_t
= got
->address() + got
->g_o_t();
1332 // Write out call stubs.
1333 typename
Glink_entries::const_iterator g
;
1334 for (g
= this->glink_entries_
.begin();
1335 g
!= this->glink_entries_
.end();
1338 uint64_t plt_addr
= plt_base
+ g
->first
.sym_
->plt_offset();
1339 uint64_t got_addr
= g_o_t
;
1340 uint64_t pltoff
= plt_addr
- got_addr
;
1342 if (pltoff
+ 0x80008000 > 0xffffffff || (pltoff
& 7) != 0)
1343 gold_error(_("%s: linkage table error against `%s'"),
1344 g
->first
.object_
->name().c_str(),
1345 g
->first
.sym_
->demangled_name().c_str());
1347 p
= oview
+ g
->second
* this->glink_entry_size();
1348 if (ha(pltoff
) != 0)
1350 write_insn
<big_endian
>(p
, addis_12_2
+ ha(pltoff
)), p
+= 4;
1351 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
1352 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
)), p
+= 4;
1353 if (ha(pltoff
+ 16) != ha(pltoff
))
1355 write_insn
<big_endian
>(p
, addi_12_12
+ l(pltoff
)), p
+= 4;
1358 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1359 write_insn
<big_endian
>(p
, ld_2_12
+ l(pltoff
+ 8)), p
+= 4;
1360 write_insn
<big_endian
>(p
, ld_11_12
+ l(pltoff
+ 16)), p
+= 4;
1361 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1365 write_insn
<big_endian
>(p
, std_2_1
+ 40), p
+= 4;
1366 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
)), p
+= 4;
1367 if (ha(pltoff
+ 16) != ha(pltoff
))
1369 write_insn
<big_endian
>(p
, addi_2_2
+ l(pltoff
)), p
+= 4;
1372 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1373 write_insn
<big_endian
>(p
, ld_11_2
+ l(pltoff
+ 16)), p
+= 4;
1374 write_insn
<big_endian
>(p
, ld_2_2
+ l(pltoff
+ 8)), p
+= 4;
1375 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1379 // Write pltresolve stub.
1380 p
= oview
+ this->pltresolve_
;
1381 uint64_t after_bcl
= this->address() + this->pltresolve_
+ 16;
1382 uint64_t pltoff
= plt_base
- after_bcl
;
1384 elfcpp::Swap
<64, big_endian
>::writeval(p
, pltoff
), p
+= 8;
1386 write_insn
<big_endian
>(p
, mflr_12
), p
+= 4;
1387 write_insn
<big_endian
>(p
, bcl_20_31
), p
+= 4;
1388 write_insn
<big_endian
>(p
, mflr_11
), p
+= 4;
1389 write_insn
<big_endian
>(p
, ld_2_11
+ l(-16)), p
+= 4;
1390 write_insn
<big_endian
>(p
, mtlr_12
), p
+= 4;
1391 write_insn
<big_endian
>(p
, add_12_2_11
), p
+= 4;
1392 write_insn
<big_endian
>(p
, ld_11_12
+ 0), p
+= 4;
1393 write_insn
<big_endian
>(p
, ld_2_12
+ 8), p
+= 4;
1394 write_insn
<big_endian
>(p
, mtctr_11
), p
+= 4;
1395 write_insn
<big_endian
>(p
, ld_11_12
+ 16), p
+= 4;
1396 write_insn
<big_endian
>(p
, bctr
), p
+= 4;
1397 while (p
< oview
+ this->pltresolve_
+ this->pltresolve_size
)
1398 write_insn
<big_endian
>(p
, nop
), p
+= 4;
1400 // Write lazy link call stubs.
1402 while (p
< oview
+ oview_size
)
1406 write_insn
<big_endian
>(p
, li_0_0
+ indx
), p
+= 4;
1410 write_insn
<big_endian
>(p
, lis_0_0
+ hi(indx
)), p
+= 4;
1411 write_insn
<big_endian
>(p
, ori_0_0_0
+ l(indx
)), p
+= 4;
1413 uint16_t branch_off
= this->pltresolve_
+ 8 - (p
- oview
);
1414 write_insn
<big_endian
>(p
, b
+ (branch_off
& 0x3fffffc)), p
+= 4;
1420 // Write out call stubs.
1421 typename
Glink_entries::const_iterator g
;
1422 for (g
= this->glink_entries_
.begin();
1423 g
!= this->glink_entries_
.end();
1426 uint32_t plt_addr
= plt_base
+ g
->first
.sym_
->plt_offset();
1429 p
= oview
+ g
->second
* this->glink_entry_size();
1430 if (parameters
->options().output_is_position_independent())
1432 const Powerpc_relobj
<size
, big_endian
>* object
= static_cast
1433 <const Powerpc_relobj
<size
, big_endian
>*>(g
->first
.object_
);
1436 unsigned int got2
= object
->got2_shndx();
1437 got_addr
= (g
->first
.object_
->output_section(got2
)->address()
1438 + g
->first
.object_
->output_section_offset(got2
)
1439 + g
->first
.addend_
);
1444 uint32_t pltoff
= plt_addr
- got_addr
;
1445 if (ha(pltoff
) == 0)
1447 write_insn
<big_endian
>(p
+ 0, lwz_11_30
+ l(pltoff
));
1448 write_insn
<big_endian
>(p
+ 4, mtctr_11
);
1449 write_insn
<big_endian
>(p
+ 8, bctr
);
1453 write_insn
<big_endian
>(p
+ 0, addis_11_30
+ ha(pltoff
));
1454 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(pltoff
));
1455 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
1456 write_insn
<big_endian
>(p
+ 12, bctr
);
1461 write_insn
<big_endian
>(p
+ 0, lis_11
+ ha(plt_addr
));
1462 write_insn
<big_endian
>(p
+ 4, lwz_11_11
+ l(plt_addr
));
1463 write_insn
<big_endian
>(p
+ 8, mtctr_11
);
1464 write_insn
<big_endian
>(p
+ 12, bctr
);
1468 // Write out pltresolve branch table.
1469 p
= oview
+ this->pltresolve_
;
1470 unsigned int the_end
= oview_size
- this->pltresolve_size
;
1471 unsigned char *end_p
= oview
+ the_end
;
1472 while (p
< end_p
- 8 * 4)
1473 write_insn
<big_endian
>(p
, b
+ end_p
- p
), p
+= 4;
1475 write_insn
<big_endian
>(p
, nop
), p
+= 4;
1477 // Write out pltresolve call stub.
1478 if (parameters
->options().output_is_position_independent())
1480 uint32_t res0_off
= this->pltresolve_
;
1481 uint32_t after_bcl_off
= the_end
+ 12;
1482 uint32_t bcl_res0
= after_bcl_off
- res0_off
;
1484 write_insn
<big_endian
>(p
+ 0, addis_11_11
+ ha(bcl_res0
));
1485 write_insn
<big_endian
>(p
+ 4, mflr_0
);
1486 write_insn
<big_endian
>(p
+ 8, bcl_20_31
);
1487 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(bcl_res0
));
1488 write_insn
<big_endian
>(p
+ 16, mflr_12
);
1489 write_insn
<big_endian
>(p
+ 20, mtlr_0
);
1490 write_insn
<big_endian
>(p
+ 24, sub_11_11_12
);
1492 uint32_t got_bcl
= g_o_t
+ 4 - (after_bcl_off
+ this->address());
1494 write_insn
<big_endian
>(p
+ 28, addis_12_12
+ ha(got_bcl
));
1495 if (ha(got_bcl
) == ha(got_bcl
+ 4))
1497 write_insn
<big_endian
>(p
+ 32, lwz_0_12
+ l(got_bcl
));
1498 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ l(got_bcl
+ 4));
1502 write_insn
<big_endian
>(p
+ 32, lwzu_0_12
+ l(got_bcl
));
1503 write_insn
<big_endian
>(p
+ 36, lwz_12_12
+ 4);
1505 write_insn
<big_endian
>(p
+ 40, mtctr_0
);
1506 write_insn
<big_endian
>(p
+ 44, add_0_11_11
);
1507 write_insn
<big_endian
>(p
+ 48, add_11_0_11
);
1508 write_insn
<big_endian
>(p
+ 52, bctr
);
1509 write_insn
<big_endian
>(p
+ 56, nop
);
1510 write_insn
<big_endian
>(p
+ 60, nop
);
1514 uint32_t res0
= this->pltresolve_
+ this->address();
1516 write_insn
<big_endian
>(p
+ 0, lis_12
+ ha(g_o_t
+ 4));
1517 write_insn
<big_endian
>(p
+ 4, addis_11_11
+ ha(-res0
));
1518 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
1519 write_insn
<big_endian
>(p
+ 8, lwz_0_12
+ l(g_o_t
+ 4));
1521 write_insn
<big_endian
>(p
+ 8, lwzu_0_12
+ l(g_o_t
+ 4));
1522 write_insn
<big_endian
>(p
+ 12, addi_11_11
+ l(-res0
));
1523 write_insn
<big_endian
>(p
+ 16, mtctr_0
);
1524 write_insn
<big_endian
>(p
+ 20, add_0_11_11
);
1525 if (ha(g_o_t
+ 4) == ha(g_o_t
+ 8))
1526 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ l(g_o_t
+ 8));
1528 write_insn
<big_endian
>(p
+ 24, lwz_12_12
+ 4);
1529 write_insn
<big_endian
>(p
+ 28, add_11_0_11
);
1530 write_insn
<big_endian
>(p
+ 32, bctr
);
1531 write_insn
<big_endian
>(p
+ 36, nop
);
1532 write_insn
<big_endian
>(p
+ 40, nop
);
1533 write_insn
<big_endian
>(p
+ 44, nop
);
1534 write_insn
<big_endian
>(p
+ 48, nop
);
1535 write_insn
<big_endian
>(p
+ 52, nop
);
1536 write_insn
<big_endian
>(p
+ 56, nop
);
1537 write_insn
<big_endian
>(p
+ 60, nop
);
1542 of
->write_output_view(off
, oview_size
, oview
);
1545 // Create the glink section.
1547 template<int size
, bool big_endian
>
1549 Target_powerpc
<size
, big_endian
>::make_glink_section(Layout
* layout
)
1551 if (this->glink_
== NULL
)
1553 this->glink_
= new Output_data_glink
<size
, big_endian
>(this);
1554 layout
->add_output_section_data(".text", elfcpp::SHT_PROGBITS
,
1555 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
1556 this->glink_
, ORDER_TEXT
, false);
1560 // Create a PLT entry for a global symbol.
1562 template<int size
, bool big_endian
>
1564 Target_powerpc
<size
, big_endian
>::make_plt_entry(
1567 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1568 const Sized_relobj
<size
, big_endian
>* object
)
1570 if (this->plt_
== NULL
)
1571 this->make_plt_section(layout
);
1573 this->plt_
->add_entry(gsym
);
1575 this->glink_
->add_entry(gsym
, reloc
, object
);
1578 // Return the number of entries in the PLT.
1580 template<int size
, bool big_endian
>
1582 Target_powerpc
<size
, big_endian
>::plt_entry_count() const
1584 if (this->plt_
== NULL
)
1586 return this->plt_
->entry_count();
1589 // Return the offset of the first non-reserved PLT entry.
1591 template<int size
, bool big_endian
>
1593 Target_powerpc
<size
, big_endian
>::first_plt_entry_offset() const
1595 return Output_data_plt_powerpc
<size
, big_endian
>::first_plt_entry_offset();
1598 // Return the size of each PLT entry.
1600 template<int size
, bool big_endian
>
1602 Target_powerpc
<size
, big_endian
>::plt_entry_size() const
1604 return Output_data_plt_powerpc
<size
, big_endian
>::get_plt_entry_size();
1607 // Create a GOT entry for the TLS module index.
1609 template<int size
, bool big_endian
>
1611 Target_powerpc
<size
, big_endian
>::got_mod_index_entry(
1612 Symbol_table
* symtab
,
1614 Sized_relobj_file
<size
, big_endian
>* object
)
1616 if (this->got_mod_index_offset_
== -1U)
1618 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
1619 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
1620 Output_data_got_powerpc
<size
, big_endian
>* got
;
1621 unsigned int got_offset
;
1623 got
= this->got_section(symtab
, layout
);
1624 got
->reserve_ent(2);
1625 got_offset
= got
->add_constant(0);
1626 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
1628 got
->add_constant(0);
1629 this->got_mod_index_offset_
= got_offset
;
1631 return this->got_mod_index_offset_
;
1634 // Optimize the TLS relocation type based on what we know about the
1635 // symbol. IS_FINAL is true if the final address of this symbol is
1636 // known at link time.
1638 template<int size
, bool big_endian
>
1639 tls::Tls_optimization
1640 Target_powerpc
<size
, big_endian
>::optimize_tls_reloc(bool, int)
1642 // If we are generating a shared library, then we can't do anything
1644 if (parameters
->options().shared())
1645 return tls::TLSOPT_NONE
;
1647 return tls::TLSOPT_NONE
;
1650 // Get the Reference_flags for a particular relocation.
1652 template<int size
, bool big_endian
>
1654 Target_powerpc
<size
, big_endian
>::Scan::get_reference_flags(unsigned int r_type
)
1658 case elfcpp::R_POWERPC_NONE
:
1659 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1660 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1661 case elfcpp::R_PPC64_TOC
:
1662 // No symbol reference.
1665 case elfcpp::R_POWERPC_ADDR16
:
1666 case elfcpp::R_POWERPC_ADDR16_LO
:
1667 case elfcpp::R_POWERPC_ADDR16_HI
:
1668 case elfcpp::R_POWERPC_ADDR16_HA
:
1669 case elfcpp::R_POWERPC_ADDR32
:
1670 case elfcpp::R_PPC64_ADDR64
:
1671 return Symbol::ABSOLUTE_REF
;
1673 case elfcpp::R_POWERPC_REL24
:
1674 case elfcpp::R_PPC_LOCAL24PC
:
1675 case elfcpp::R_POWERPC_REL16
:
1676 case elfcpp::R_POWERPC_REL16_LO
:
1677 case elfcpp::R_POWERPC_REL16_HI
:
1678 case elfcpp::R_POWERPC_REL16_HA
:
1679 return Symbol::RELATIVE_REF
;
1681 case elfcpp::R_PPC_PLTREL24
:
1682 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
1684 case elfcpp::R_POWERPC_GOT16
:
1685 case elfcpp::R_POWERPC_GOT16_LO
:
1686 case elfcpp::R_POWERPC_GOT16_HI
:
1687 case elfcpp::R_POWERPC_GOT16_HA
:
1688 case elfcpp::R_PPC64_TOC16
:
1689 case elfcpp::R_PPC64_TOC16_LO
:
1690 case elfcpp::R_PPC64_TOC16_HI
:
1691 case elfcpp::R_PPC64_TOC16_HA
:
1692 case elfcpp::R_PPC64_TOC16_DS
:
1693 case elfcpp::R_PPC64_TOC16_LO_DS
:
1695 return Symbol::ABSOLUTE_REF
;
1697 case elfcpp::R_POWERPC_GOT_TPREL16
:
1698 case elfcpp::R_POWERPC_TLS
:
1699 return Symbol::TLS_REF
;
1701 case elfcpp::R_POWERPC_COPY
:
1702 case elfcpp::R_POWERPC_GLOB_DAT
:
1703 case elfcpp::R_POWERPC_JMP_SLOT
:
1704 case elfcpp::R_POWERPC_RELATIVE
:
1705 case elfcpp::R_POWERPC_DTPMOD
:
1707 // Not expected. We will give an error later.
1712 // Report an unsupported relocation against a local symbol.
1714 template<int size
, bool big_endian
>
1716 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
1717 Sized_relobj_file
<size
, big_endian
>* object
,
1718 unsigned int r_type
)
1720 gold_error(_("%s: unsupported reloc %u against local symbol"),
1721 object
->name().c_str(), r_type
);
1724 // We are about to emit a dynamic relocation of type R_TYPE. If the
1725 // dynamic linker does not support it, issue an error.
1727 template<int size
, bool big_endian
>
1729 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
1730 unsigned int r_type
)
1732 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
1734 // These are the relocation types supported by glibc for both 32-bit
1735 // and 64-bit powerpc.
1738 case elfcpp::R_POWERPC_RELATIVE
:
1739 case elfcpp::R_POWERPC_GLOB_DAT
:
1740 case elfcpp::R_POWERPC_DTPMOD
:
1741 case elfcpp::R_POWERPC_DTPREL
:
1742 case elfcpp::R_POWERPC_TPREL
:
1743 case elfcpp::R_POWERPC_JMP_SLOT
:
1744 case elfcpp::R_POWERPC_COPY
:
1745 case elfcpp::R_POWERPC_ADDR32
:
1746 case elfcpp::R_POWERPC_ADDR24
:
1747 case elfcpp::R_POWERPC_REL24
:
1758 // These are the relocation types supported only on 64-bit.
1759 case elfcpp::R_PPC64_ADDR64
:
1760 case elfcpp::R_PPC64_TPREL16_LO_DS
:
1761 case elfcpp::R_PPC64_TPREL16_DS
:
1762 case elfcpp::R_POWERPC_TPREL16
:
1763 case elfcpp::R_POWERPC_TPREL16_LO
:
1764 case elfcpp::R_POWERPC_TPREL16_HI
:
1765 case elfcpp::R_POWERPC_TPREL16_HA
:
1766 case elfcpp::R_PPC64_TPREL16_HIGHER
:
1767 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
1768 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
1769 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
1770 case elfcpp::R_PPC64_ADDR16_LO_DS
:
1771 case elfcpp::R_POWERPC_ADDR16_LO
:
1772 case elfcpp::R_POWERPC_ADDR16_HI
:
1773 case elfcpp::R_POWERPC_ADDR16_HA
:
1774 case elfcpp::R_POWERPC_ADDR30
:
1775 case elfcpp::R_PPC64_UADDR64
:
1776 case elfcpp::R_POWERPC_UADDR32
:
1777 case elfcpp::R_POWERPC_ADDR16
:
1778 case elfcpp::R_POWERPC_UADDR16
:
1779 case elfcpp::R_PPC64_ADDR16_DS
:
1780 case elfcpp::R_PPC64_ADDR16_HIGHER
:
1781 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
1782 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
1783 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
1784 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
1785 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
1786 case elfcpp::R_POWERPC_REL32
:
1787 case elfcpp::R_PPC64_REL64
:
1798 // These are the relocation types supported only on 32-bit.
1805 // This prevents us from issuing more than one error per reloc
1806 // section. But we can still wind up issuing more than one
1807 // error per object file.
1808 if (this->issued_non_pic_error_
)
1810 gold_assert(parameters
->options().output_is_position_independent());
1811 object
->error(_("requires unsupported dynamic reloc; "
1812 "recompile with -fPIC"));
1813 this->issued_non_pic_error_
= true;
1817 // Scan a relocation for a local symbol.
1819 template<int size
, bool big_endian
>
1821 Target_powerpc
<size
, big_endian
>::Scan::local(
1822 Symbol_table
* symtab
,
1824 Target_powerpc
<size
, big_endian
>* target
,
1825 Sized_relobj_file
<size
, big_endian
>* object
,
1826 unsigned int data_shndx
,
1827 Output_section
* output_section
,
1828 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1829 unsigned int r_type
,
1830 const elfcpp::Sym
<size
, big_endian
>& lsym
)
1834 case elfcpp::R_POWERPC_NONE
:
1835 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1836 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1837 case elfcpp::R_PPC64_TOCSAVE
:
1840 case elfcpp::R_PPC64_ADDR64
:
1841 case elfcpp::R_POWERPC_ADDR32
:
1842 case elfcpp::R_POWERPC_ADDR16_HA
:
1843 case elfcpp::R_POWERPC_ADDR16_LO
:
1844 // If building a shared library (or a position-independent
1845 // executable), we need to create a dynamic relocation for
1847 if (parameters
->options().output_is_position_independent())
1849 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1851 check_non_pic(object
, r_type
);
1852 if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
1854 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1855 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
1856 data_shndx
, reloc
.get_r_offset(),
1857 reloc
.get_r_addend());
1861 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1862 gold_assert(lsym
.get_st_value() == 0);
1863 rela_dyn
->add_local_relative(object
, r_sym
, r_type
,
1864 output_section
, data_shndx
,
1865 reloc
.get_r_offset(),
1866 reloc
.get_r_addend(), false);
1871 case elfcpp::R_POWERPC_REL24
:
1872 case elfcpp::R_PPC_LOCAL24PC
:
1873 case elfcpp::R_POWERPC_REL32
:
1874 case elfcpp::R_POWERPC_REL16_LO
:
1875 case elfcpp::R_POWERPC_REL16_HA
:
1878 case elfcpp::R_POWERPC_GOT16
:
1879 case elfcpp::R_POWERPC_GOT16_LO
:
1880 case elfcpp::R_POWERPC_GOT16_HI
:
1881 case elfcpp::R_POWERPC_GOT16_HA
:
1883 // The symbol requires a GOT entry.
1884 Output_data_got_powerpc
<size
, big_endian
>* got
;
1887 got
= target
->got_section(symtab
, layout
);
1888 r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1890 // If we are generating a shared object, we need to add a
1891 // dynamic relocation for this symbol's GOT entry.
1892 if (parameters
->options().output_is_position_independent())
1894 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
1896 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1899 off
= got
->add_constant(0);
1900 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
1901 rela_dyn
->add_local_relative(object
, r_sym
,
1902 elfcpp::R_POWERPC_RELATIVE
,
1903 got
, off
, 0, false);
1907 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
1911 case elfcpp::R_PPC64_TOC16
:
1912 case elfcpp::R_PPC64_TOC16_LO
:
1913 case elfcpp::R_PPC64_TOC16_HI
:
1914 case elfcpp::R_PPC64_TOC16_HA
:
1915 case elfcpp::R_PPC64_TOC16_DS
:
1916 case elfcpp::R_PPC64_TOC16_LO_DS
:
1917 case elfcpp::R_PPC64_TOC
:
1918 // We need a GOT section.
1919 target
->got_section(symtab
, layout
);
1922 // These are relocations which should only be seen by the
1923 // dynamic linker, and should never be seen here.
1924 case elfcpp::R_POWERPC_COPY
:
1925 case elfcpp::R_POWERPC_GLOB_DAT
:
1926 case elfcpp::R_POWERPC_JMP_SLOT
:
1927 case elfcpp::R_POWERPC_RELATIVE
:
1928 case elfcpp::R_POWERPC_DTPMOD
:
1929 gold_error(_("%s: unexpected reloc %u in object file"),
1930 object
->name().c_str(), r_type
);
1934 unsupported_reloc_local(object
, r_type
);
1939 // Report an unsupported relocation against a global symbol.
1941 template<int size
, bool big_endian
>
1943 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
1944 Sized_relobj_file
<size
, big_endian
>* object
,
1945 unsigned int r_type
,
1948 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1949 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
1952 // Scan a relocation for a global symbol.
1954 template<int size
, bool big_endian
>
1956 Target_powerpc
<size
, big_endian
>::Scan::global(
1957 Symbol_table
* symtab
,
1959 Target_powerpc
<size
, big_endian
>* target
,
1960 Sized_relobj_file
<size
, big_endian
>* object
,
1961 unsigned int data_shndx
,
1962 Output_section
* output_section
,
1963 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1964 unsigned int r_type
,
1969 case elfcpp::R_POWERPC_NONE
:
1970 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1971 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1972 case elfcpp::R_PPC_LOCAL24PC
:
1975 case elfcpp::R_POWERPC_ADDR16
:
1976 case elfcpp::R_POWERPC_ADDR16_LO
:
1977 case elfcpp::R_POWERPC_ADDR16_HI
:
1978 case elfcpp::R_POWERPC_ADDR16_HA
:
1979 case elfcpp::R_POWERPC_ADDR32
:
1980 case elfcpp::R_PPC64_ADDR64
:
1982 // Make a PLT entry if necessary.
1983 if (gsym
->needs_plt_entry())
1985 target
->make_plt_entry(layout
, gsym
, reloc
, 0);
1986 // Since this is not a PC-relative relocation, we may be
1987 // taking the address of a function. In that case we need to
1988 // set the entry in the dynamic symbol table to the address of
1991 && gsym
->is_from_dynobj() && !parameters
->options().shared())
1992 gsym
->set_needs_dynsym_value();
1994 // Make a dynamic relocation if necessary.
1995 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
1997 if (gsym
->may_need_copy_reloc())
1999 target
->copy_reloc(symtab
, layout
, object
,
2000 data_shndx
, output_section
, gsym
, reloc
);
2002 else if ((r_type
== elfcpp::R_POWERPC_ADDR32
2003 || r_type
== elfcpp::R_PPC64_ADDR64
)
2004 && gsym
->can_use_relative_reloc(false))
2006 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2007 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
2008 output_section
, object
,
2009 data_shndx
, reloc
.get_r_offset(),
2010 reloc
.get_r_addend(), false);
2014 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2016 check_non_pic(object
, r_type
);
2017 if (gsym
->is_from_dynobj()
2018 || gsym
->is_undefined()
2019 || gsym
->is_preemptible())
2020 rela_dyn
->add_global(gsym
, r_type
, output_section
,
2022 reloc
.get_r_offset(),
2023 reloc
.get_r_addend());
2025 rela_dyn
->add_global_relative(gsym
, r_type
,
2026 output_section
, object
,
2028 reloc
.get_r_offset(),
2029 reloc
.get_r_addend(), false);
2035 case elfcpp::R_PPC_PLTREL24
:
2036 case elfcpp::R_POWERPC_REL24
:
2038 if (gsym
->needs_plt_entry()
2039 || (!gsym
->final_value_is_known()
2040 && !(gsym
->is_defined()
2041 && !gsym
->is_from_dynobj()
2042 && !gsym
->is_preemptible())))
2043 target
->make_plt_entry(layout
, gsym
, reloc
, object
);
2044 // Make a dynamic relocation if necessary.
2045 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
2047 if (gsym
->may_need_copy_reloc())
2049 target
->copy_reloc(symtab
, layout
, object
,
2050 data_shndx
, output_section
, gsym
,
2055 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2056 check_non_pic(object
, r_type
);
2057 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
2058 data_shndx
, reloc
.get_r_offset(),
2059 reloc
.get_r_addend());
2065 case elfcpp::R_POWERPC_REL16
:
2066 case elfcpp::R_POWERPC_REL16_LO
:
2067 case elfcpp::R_POWERPC_REL16_HI
:
2068 case elfcpp::R_POWERPC_REL16_HA
:
2071 case elfcpp::R_POWERPC_GOT16
:
2072 case elfcpp::R_POWERPC_GOT16_LO
:
2073 case elfcpp::R_POWERPC_GOT16_HI
:
2074 case elfcpp::R_POWERPC_GOT16_HA
:
2076 // The symbol requires a GOT entry.
2077 Output_data_got_powerpc
<size
, big_endian
>* got
;
2079 got
= target
->got_section(symtab
, layout
);
2080 if (gsym
->final_value_is_known())
2081 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
2084 // If this symbol is not fully resolved, we need to add a
2085 // dynamic relocation for it.
2086 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2087 if (gsym
->is_from_dynobj()
2088 || gsym
->is_undefined()
2089 || gsym
->is_preemptible())
2090 got
->add_global_with_rel(gsym
, GOT_TYPE_STANDARD
, rela_dyn
,
2091 elfcpp::R_POWERPC_GLOB_DAT
);
2092 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
2094 unsigned int off
= got
->add_constant(0);
2096 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
2097 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
2098 got
, off
, 0, false);
2104 case elfcpp::R_PPC64_TOC
:
2105 case elfcpp::R_PPC64_TOC16
:
2106 case elfcpp::R_PPC64_TOC16_LO
:
2107 case elfcpp::R_PPC64_TOC16_HI
:
2108 case elfcpp::R_PPC64_TOC16_HA
:
2109 case elfcpp::R_PPC64_TOC16_DS
:
2110 case elfcpp::R_PPC64_TOC16_LO_DS
:
2111 // We need a GOT section.
2112 target
->got_section(symtab
, layout
);
2115 case elfcpp::R_POWERPC_GOT_TPREL16
:
2116 case elfcpp::R_POWERPC_TLS
:
2120 // These are relocations which should only be seen by the
2121 // dynamic linker, and should never be seen here.
2122 case elfcpp::R_POWERPC_COPY
:
2123 case elfcpp::R_POWERPC_GLOB_DAT
:
2124 case elfcpp::R_POWERPC_JMP_SLOT
:
2125 case elfcpp::R_POWERPC_RELATIVE
:
2126 case elfcpp::R_POWERPC_DTPMOD
:
2127 gold_error(_("%s: unexpected reloc %u in object file"),
2128 object
->name().c_str(), r_type
);
2132 unsupported_reloc_global(object
, r_type
, gsym
);
2137 // Process relocations for gc.
2139 template<int size
, bool big_endian
>
2141 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
2142 Symbol_table
* symtab
,
2144 Sized_relobj_file
<size
, big_endian
>* object
,
2145 unsigned int data_shndx
,
2147 const unsigned char* prelocs
,
2149 Output_section
* output_section
,
2150 bool needs_special_offset_handling
,
2151 size_t local_symbol_count
,
2152 const unsigned char* plocal_symbols
)
2154 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
2155 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
2157 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
,
2158 typename
Target_powerpc::Relocatable_size_for_reloc
>(
2167 needs_special_offset_handling
,
2172 // Scan relocations for a section.
2174 template<int size
, bool big_endian
>
2176 Target_powerpc
<size
, big_endian
>::scan_relocs(
2177 Symbol_table
* symtab
,
2179 Sized_relobj_file
<size
, big_endian
>* object
,
2180 unsigned int data_shndx
,
2181 unsigned int sh_type
,
2182 const unsigned char* prelocs
,
2184 Output_section
* output_section
,
2185 bool needs_special_offset_handling
,
2186 size_t local_symbol_count
,
2187 const unsigned char* plocal_symbols
)
2189 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
2190 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
2192 if (sh_type
== elfcpp::SHT_REL
)
2194 gold_error(_("%s: unsupported REL reloc section"),
2195 object
->name().c_str());
2201 static Output_data_space
* sdata
;
2203 // Define _SDA_BASE_ at the start of the .sdata section.
2206 // layout->find_output_section(".sdata") == NULL
2207 sdata
= new Output_data_space(4, "** sdata");
2209 = layout
->add_output_section_data(".sdata", 0,
2211 | elfcpp::SHF_WRITE
,
2212 sdata
, ORDER_SMALL_DATA
, false);
2213 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
2214 Symbol_table::PREDEFINED
,
2215 os
, 32768, 0, elfcpp::STT_OBJECT
,
2216 elfcpp::STB_LOCAL
, elfcpp::STV_HIDDEN
,
2221 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
2230 needs_special_offset_handling
,
2235 // Finalize the sections.
2237 template<int size
, bool big_endian
>
2239 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
2241 const Input_objects
*,
2244 // Fill in some more dynamic tags.
2245 const Reloc_section
* rel_plt
= (this->plt_
== NULL
2247 : this->plt_
->rel_plt());
2248 layout
->add_target_dynamic_tags(false, this->plt_
, rel_plt
,
2249 this->rela_dyn_
, true, size
== 32);
2253 this->got_
->finalize_data_size();
2254 Output_data_dynamic
* odyn
= layout
->dynamic_data();
2255 odyn
->add_section_plus_offset(elfcpp::DT_PPC_GOT
,
2256 this->got_
, this->got_
->g_o_t());
2259 // Emit any relocs we saved in an attempt to avoid generating COPY
2261 if (this->copy_relocs_
.any_saved_relocs())
2262 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
2265 // Perform a relocation.
2267 template<int size
, bool big_endian
>
2269 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
2270 const Relocate_info
<size
, big_endian
>* relinfo
,
2271 Target_powerpc
* target
,
2274 const elfcpp::Rela
<size
, big_endian
>& rela
,
2275 unsigned int r_type
,
2276 const Sized_symbol
<size
>* gsym
,
2277 const Symbol_value
<size
>* psymval
,
2278 unsigned char* view
,
2279 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
2280 section_size_type
/* view_size */)
2282 const unsigned int toc_base_offset
= 0x8000;
2283 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
2284 const Powerpc_relobj
<size
, big_endian
>* const object
2285 = static_cast<const Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
2286 elfcpp::Elf_Xword value
;
2288 if (r_type
== elfcpp::R_POWERPC_GOT16
2289 || r_type
== elfcpp::R_POWERPC_GOT16_LO
2290 || r_type
== elfcpp::R_POWERPC_GOT16_HI
2291 || r_type
== elfcpp::R_POWERPC_GOT16_HA
2292 || r_type
== elfcpp::R_PPC64_GOT16_DS
2293 || r_type
== elfcpp::R_PPC64_GOT16_LO_DS
)
2297 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
2298 value
= gsym
->got_offset(GOT_TYPE_STANDARD
);
2302 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
2303 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
2304 value
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
2306 value
-= target
->got_section()->g_o_t();
2308 else if (r_type
== elfcpp::R_PPC64_TOC
)
2310 value
= target
->got_section()->address() + toc_base_offset
;
2312 else if (gsym
!= NULL
2313 && (r_type
== elfcpp::R_POWERPC_REL24
2314 || r_type
== elfcpp::R_PPC_PLTREL24
)
2315 && gsym
->use_plt_offset(Scan::get_reference_flags(r_type
)))
2317 const Output_data_glink
<size
, big_endian
>* glink
;
2319 glink
= target
->glink_section();
2320 unsigned int glink_index
= glink
->find_entry(gsym
, rela
, object
);
2321 value
= glink
->address() + glink_index
* glink
->glink_entry_size();
2325 elfcpp::Elf_Xword addend
= 0;
2326 if (r_type
!= elfcpp::R_PPC_PLTREL24
)
2327 addend
= rela
.get_r_addend();
2328 value
= psymval
->value(object
, addend
);
2333 case elfcpp::R_PPC64_TOC16
:
2334 case elfcpp::R_PPC64_TOC16_LO
:
2335 case elfcpp::R_PPC64_TOC16_HI
:
2336 case elfcpp::R_PPC64_TOC16_HA
:
2337 case elfcpp::R_PPC64_TOC16_DS
:
2338 case elfcpp::R_PPC64_TOC16_LO_DS
:
2339 // Subtract the TOC base address.
2340 value
-= target
->got_section()->address() + toc_base_offset
;
2343 case elfcpp::R_POWERPC_SECTOFF
:
2344 case elfcpp::R_POWERPC_SECTOFF_LO
:
2345 case elfcpp::R_POWERPC_SECTOFF_HI
:
2346 case elfcpp::R_POWERPC_SECTOFF_HA
:
2347 case elfcpp::R_PPC64_SECTOFF_DS
:
2348 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
2350 value
-= os
->address();
2359 case elfcpp::R_POWERPC_NONE
:
2360 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
2361 case elfcpp::R_POWERPC_GNU_VTENTRY
:
2364 case elfcpp::R_POWERPC_REL32
:
2365 Reloc::rel32(view
, value
, 0, address
);
2368 case elfcpp::R_POWERPC_REL24
:
2369 case elfcpp::R_PPC_PLTREL24
:
2370 case elfcpp::R_PPC_LOCAL24PC
:
2371 Reloc::rel24(view
, value
, 0, address
);
2374 case elfcpp::R_POWERPC_REL14
:
2375 Reloc::rel14(view
, value
, 0, address
);
2378 case elfcpp::R_PPC64_ADDR64
:
2379 case elfcpp::R_PPC64_TOC
:
2380 Relocate_functions
<size
, big_endian
>::rela64(view
, value
, 0);
2383 case elfcpp::R_POWERPC_ADDR32
:
2384 Relocate_functions
<size
, big_endian
>::rela32(view
, value
, 0);
2387 case elfcpp::R_POWERPC_ADDR16
:
2388 case elfcpp::R_PPC64_TOC16
:
2389 case elfcpp::R_POWERPC_GOT16
:
2390 case elfcpp::R_POWERPC_SECTOFF
:
2391 Reloc::addr16(view
, value
, 0);
2394 case elfcpp::R_POWERPC_ADDR16_LO
:
2395 case elfcpp::R_PPC64_TOC16_LO
:
2396 case elfcpp::R_POWERPC_GOT16_LO
:
2397 case elfcpp::R_POWERPC_SECTOFF_LO
:
2398 Reloc::addr16_lo(view
, value
, 0);
2401 case elfcpp::R_POWERPC_ADDR16_HI
:
2402 case elfcpp::R_PPC64_TOC16_HI
:
2403 case elfcpp::R_POWERPC_GOT16_HI
:
2404 case elfcpp::R_POWERPC_SECTOFF_HI
:
2405 Reloc::addr16_hi(view
, value
, 0);
2408 case elfcpp::R_POWERPC_ADDR16_HA
:
2409 case elfcpp::R_PPC64_TOC16_HA
:
2410 case elfcpp::R_POWERPC_GOT16_HA
:
2411 case elfcpp::R_POWERPC_SECTOFF_HA
:
2412 Reloc::addr16_ha(view
, value
, 0);
2415 case elfcpp::R_POWERPC_REL16_LO
:
2416 Reloc::rel16_lo(view
, value
, 0, address
);
2419 case elfcpp::R_POWERPC_REL16_HI
:
2420 Reloc::rel16_hi(view
, value
, 0, address
);
2423 case elfcpp::R_POWERPC_REL16_HA
:
2424 Reloc::rel16_ha(view
, value
, 0, address
);
2427 case elfcpp::R_PPC64_ADDR16_DS
:
2428 case elfcpp::R_PPC64_ADDR16_LO_DS
:
2429 case elfcpp::R_PPC64_TOC16_DS
:
2430 case elfcpp::R_PPC64_TOC16_LO_DS
:
2431 case elfcpp::R_PPC64_GOT16_DS
:
2432 case elfcpp::R_PPC64_GOT16_LO_DS
:
2433 case elfcpp::R_PPC64_SECTOFF_DS
:
2434 case elfcpp::R_PPC64_SECTOFF_LO_DS
:
2435 Reloc::addr16_ds(view
, value
, 0);
2438 case elfcpp::R_POWERPC_COPY
:
2439 case elfcpp::R_POWERPC_GLOB_DAT
:
2440 case elfcpp::R_POWERPC_JMP_SLOT
:
2441 case elfcpp::R_POWERPC_RELATIVE
:
2442 // This is an outstanding tls reloc, which is unexpected when
2444 case elfcpp::R_POWERPC_DTPMOD
:
2445 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
2446 _("unexpected reloc %u in object file"),
2450 case elfcpp::R_PPC64_TOCSAVE
:
2451 // For the time being this can be ignored.
2455 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
2456 _("unsupported reloc %u"),
2464 // Perform a TLS relocation.
2466 template<int size
, bool big_endian
>
2468 Target_powerpc
<size
, big_endian
>::Relocate::relocate_tls(
2469 const Relocate_info
<size
, big_endian
>* relinfo
,
2470 Target_powerpc
<size
, big_endian
>* target
,
2472 const elfcpp::Rela
<size
, big_endian
>& rela
,
2473 unsigned int r_type
,
2474 const Sized_symbol
<size
>* gsym
,
2475 const Symbol_value
<size
>* psymval
,
2476 unsigned char* view
,
2477 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
2480 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
2481 const Sized_relobj_file
<size
, big_endian
>* object
= relinfo
->object
;
2483 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
2484 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
= psymval
->value(object
, 0);
2486 const bool is_final
=
2488 ? !parameters
->options().output_is_position_independent()
2489 : gsym
->final_value_is_known());
2497 // Relocate section data.
2499 template<int size
, bool big_endian
>
2501 Target_powerpc
<size
, big_endian
>::relocate_section(
2502 const Relocate_info
<size
, big_endian
>* relinfo
,
2503 unsigned int sh_type
,
2504 const unsigned char* prelocs
,
2506 Output_section
* output_section
,
2507 bool needs_special_offset_handling
,
2508 unsigned char* view
,
2509 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
2510 section_size_type view_size
,
2511 const Reloc_symbol_changes
* reloc_symbol_changes
)
2513 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
2514 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
2516 gold_assert(sh_type
== elfcpp::SHT_RELA
);
2518 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
2525 needs_special_offset_handling
,
2529 reloc_symbol_changes
);
2532 class Powerpc_scan_relocatable_reloc
2535 // Return the strategy to use for a local symbol which is not a
2536 // section symbol, given the relocation type.
2537 inline Relocatable_relocs::Reloc_strategy
2538 local_non_section_strategy(unsigned int r_type
, Relobj
*, unsigned int r_sym
)
2540 if (r_type
== 0 && r_sym
== 0)
2541 return Relocatable_relocs::RELOC_DISCARD
;
2542 return Relocatable_relocs::RELOC_COPY
;
2545 // Return the strategy to use for a local symbol which is a section
2546 // symbol, given the relocation type.
2547 inline Relocatable_relocs::Reloc_strategy
2548 local_section_strategy(unsigned int, Relobj
*)
2550 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
2553 // Return the strategy to use for a global symbol, given the
2554 // relocation type, the object, and the symbol index.
2555 inline Relocatable_relocs::Reloc_strategy
2556 global_strategy(unsigned int r_type
, Relobj
*, unsigned int)
2558 if (r_type
== elfcpp::R_PPC_PLTREL24
)
2559 return Relocatable_relocs::RELOC_SPECIAL
;
2560 return Relocatable_relocs::RELOC_COPY
;
2564 // Scan the relocs during a relocatable link.
2566 template<int size
, bool big_endian
>
2568 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
2569 Symbol_table
* symtab
,
2571 Sized_relobj_file
<size
, big_endian
>* object
,
2572 unsigned int data_shndx
,
2573 unsigned int sh_type
,
2574 const unsigned char* prelocs
,
2576 Output_section
* output_section
,
2577 bool needs_special_offset_handling
,
2578 size_t local_symbol_count
,
2579 const unsigned char* plocal_symbols
,
2580 Relocatable_relocs
* rr
)
2582 gold_assert(sh_type
== elfcpp::SHT_RELA
);
2584 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
2585 Powerpc_scan_relocatable_reloc
>(
2593 needs_special_offset_handling
,
2599 // Relocate a section during a relocatable link.
2601 template<int size
, bool big_endian
>
2603 Target_powerpc
<size
, big_endian
>::relocate_for_relocatable(
2604 const Relocate_info
<size
, big_endian
>* relinfo
,
2605 unsigned int sh_type
,
2606 const unsigned char* prelocs
,
2608 Output_section
* output_section
,
2609 off_t offset_in_output_section
,
2610 const Relocatable_relocs
* rr
,
2612 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
2614 unsigned char* reloc_view
,
2615 section_size_type reloc_view_size
)
2617 gold_assert(sh_type
== elfcpp::SHT_RELA
);
2619 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2620 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc
2622 typedef typename Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::Reloc_write
2624 const int reloc_size
2625 = Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::reloc_size
;
2626 const Address invalid_address
= static_cast<Address
>(0) - 1;
2628 Powerpc_relobj
<size
, big_endian
>* const object
2629 = static_cast<Powerpc_relobj
<size
, big_endian
>*>(relinfo
->object
);
2630 const unsigned int local_count
= object
->local_symbol_count();
2631 unsigned int got2_shndx
= object
->got2_shndx();
2632 typename
elfcpp::Elf_types
<size
>::Elf_Swxword got2_addend
= 0;
2633 if (got2_shndx
!= 0)
2634 got2_addend
= object
->get_output_section_offset(got2_shndx
);
2636 unsigned char* pwrite
= reloc_view
;
2638 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2640 Relocatable_relocs::Reloc_strategy strategy
= rr
->strategy(i
);
2641 if (strategy
== Relocatable_relocs::RELOC_DISCARD
)
2644 Reltype
reloc(prelocs
);
2645 Reltype_write
reloc_write(pwrite
);
2647 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
2648 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2649 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2651 // Get the new symbol index.
2653 unsigned int new_symndx
;
2654 if (r_sym
< local_count
)
2658 case Relocatable_relocs::RELOC_COPY
:
2659 case Relocatable_relocs::RELOC_SPECIAL
:
2660 new_symndx
= object
->symtab_index(r_sym
);
2661 gold_assert(new_symndx
!= -1U);
2664 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
:
2666 // We are adjusting a section symbol. We need to find
2667 // the symbol table index of the section symbol for
2668 // the output section corresponding to input section
2669 // in which this symbol is defined.
2670 gold_assert(r_sym
< local_count
);
2672 unsigned int shndx
=
2673 object
->local_symbol_input_shndx(r_sym
, &is_ordinary
);
2674 gold_assert(is_ordinary
);
2675 Output_section
* os
= object
->output_section(shndx
);
2676 gold_assert(os
!= NULL
);
2677 gold_assert(os
->needs_symtab_index());
2678 new_symndx
= os
->symtab_index();
2688 const Symbol
* gsym
= object
->global_symbol(r_sym
);
2689 gold_assert(gsym
!= NULL
);
2690 if (gsym
->is_forwarder())
2691 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
2693 gold_assert(gsym
->has_symtab_index());
2694 new_symndx
= gsym
->symtab_index();
2697 // Get the new offset--the location in the output section where
2698 // this relocation should be applied.
2700 Address offset
= reloc
.get_r_offset();
2702 if (static_cast<Address
>(offset_in_output_section
) != invalid_address
)
2703 new_offset
= offset
+ offset_in_output_section
;
2706 section_offset_type sot_offset
=
2707 convert_types
<section_offset_type
, Address
>(offset
);
2708 section_offset_type new_sot_offset
=
2709 output_section
->output_offset(object
, relinfo
->data_shndx
,
2711 gold_assert(new_sot_offset
!= -1);
2712 new_offset
= new_sot_offset
;
2715 reloc_write
.put_r_offset(new_offset
);
2716 reloc_write
.put_r_info(elfcpp::elf_r_info
<size
>(new_symndx
, r_type
));
2718 // Handle the reloc addend based on the strategy.
2719 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
;
2720 addend
= Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::
2721 get_reloc_addend(&reloc
);
2723 if (strategy
== Relocatable_relocs::RELOC_COPY
)
2725 else if (strategy
== Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
)
2727 const Symbol_value
<size
>* psymval
= object
->local_symbol(r_sym
);
2729 addend
= psymval
->value(object
, addend
);
2731 else if (strategy
== Relocatable_relocs::RELOC_SPECIAL
)
2733 if (addend
>= 32768)
2734 addend
+= got2_addend
;
2739 Reloc_types
<elfcpp::SHT_RELA
, size
, big_endian
>::
2740 set_reloc_addend(&reloc_write
, addend
);
2742 pwrite
+= reloc_size
;
2745 gold_assert(static_cast<section_size_type
>(pwrite
- reloc_view
)
2746 == reloc_view_size
);
2749 // Return the value to use for a dynamic which requires special
2750 // treatment. This is how we support equality comparisons of function
2751 // pointers across shared library boundaries, as described in the
2752 // processor specific ABI supplement.
2754 template<int size
, bool big_endian
>
2756 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
2760 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
2761 return this->plt_section()->address() + gsym
->plt_offset();
2767 // The selector for powerpc object files.
2769 template<int size
, bool big_endian
>
2770 class Target_selector_powerpc
: public Target_selector
2773 Target_selector_powerpc()
2774 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
2776 ? (big_endian
? "elf64-powerpc" : "elf64-powerpcle")
2777 : (big_endian
? "elf32-powerpc" : "elf32-powerpcle")),
2779 ? (big_endian
? "elf64ppc" : "elf64lppc")
2780 : (big_endian
? "elf32ppc" : "elf32lppc")))
2784 do_recognize(Input_file
*, off_t
, int machine
, int, int)
2789 if (machine
!= elfcpp::EM_PPC64
)
2794 if (machine
!= elfcpp::EM_PPC
)
2802 return this->instantiate_target();
2806 do_instantiate_target()
2807 { return new Target_powerpc
<size
, big_endian
>(); }
2810 Target_selector_powerpc
<32, true> target_selector_ppc32
;
2811 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
2812 Target_selector_powerpc
<64, true> target_selector_ppc64
;
2813 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
2815 } // End anonymous namespace.