1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009 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"
46 template<int size
, bool big_endian
>
47 class Output_data_plt_powerpc
;
49 template<int size
, bool big_endian
>
50 class Target_powerpc
: public Sized_target
<size
, big_endian
>
53 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
56 : Sized_target
<size
, big_endian
>(&powerpc_info
),
57 got_(NULL
), got2_(NULL
), toc_(NULL
),
58 plt_(NULL
), rela_dyn_(NULL
),
59 copy_relocs_(elfcpp::R_POWERPC_COPY
),
60 dynbss_(NULL
), got_mod_index_offset_(-1U)
64 // Process the relocations to determine unreferenced sections for
65 // garbage collection.
67 gc_process_relocs(const General_options
& options
,
70 Sized_relobj
<size
, big_endian
>* object
,
71 unsigned int data_shndx
,
73 const unsigned char* prelocs
,
75 Output_section
* output_section
,
76 bool needs_special_offset_handling
,
77 size_t local_symbol_count
,
78 const unsigned char* plocal_symbols
);
80 // Scan the relocations to look for symbol adjustments.
82 scan_relocs(const General_options
& options
,
85 Sized_relobj
<size
, big_endian
>* object
,
86 unsigned int data_shndx
,
88 const unsigned char* prelocs
,
90 Output_section
* output_section
,
91 bool needs_special_offset_handling
,
92 size_t local_symbol_count
,
93 const unsigned char* plocal_symbols
);
94 // Finalize the sections.
96 do_finalize_sections(Layout
*);
98 // Return the value to use for a dynamic which requires special
101 do_dynsym_value(const Symbol
*) const;
103 // Relocate a section.
105 relocate_section(const Relocate_info
<size
, big_endian
>*,
106 unsigned int sh_type
,
107 const unsigned char* prelocs
,
109 Output_section
* output_section
,
110 bool needs_special_offset_handling
,
112 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
113 section_size_type view_size
);
115 // Scan the relocs during a relocatable link.
117 scan_relocatable_relocs(const General_options
& options
,
118 Symbol_table
* symtab
,
120 Sized_relobj
<size
, big_endian
>* object
,
121 unsigned int data_shndx
,
122 unsigned int sh_type
,
123 const unsigned char* prelocs
,
125 Output_section
* output_section
,
126 bool needs_special_offset_handling
,
127 size_t local_symbol_count
,
128 const unsigned char* plocal_symbols
,
129 Relocatable_relocs
*);
131 // Relocate a section during a relocatable link.
133 relocate_for_relocatable(const Relocate_info
<size
, big_endian
>*,
134 unsigned int sh_type
,
135 const unsigned char* prelocs
,
137 Output_section
* output_section
,
138 off_t offset_in_output_section
,
139 const Relocatable_relocs
*,
141 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
142 section_size_type view_size
,
143 unsigned char* reloc_view
,
144 section_size_type reloc_view_size
);
146 // Return whether SYM is defined by the ABI.
148 do_is_defined_by_abi(const Symbol
* sym
) const
150 return strcmp(sym
->name(), "___tls_get_addr") == 0;
153 // Return the size of the GOT section.
157 gold_assert(this->got_
!= NULL
);
158 return this->got_
->data_size();
163 // The class which scans relocations.
168 : issued_non_pic_error_(false)
172 local(const General_options
& options
, Symbol_table
* symtab
,
173 Layout
* layout
, Target_powerpc
* target
,
174 Sized_relobj
<size
, big_endian
>* object
,
175 unsigned int data_shndx
,
176 Output_section
* output_section
,
177 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
178 const elfcpp::Sym
<size
, big_endian
>& lsym
);
181 global(const General_options
& options
, Symbol_table
* symtab
,
182 Layout
* layout
, Target_powerpc
* target
,
183 Sized_relobj
<size
, big_endian
>* object
,
184 unsigned int data_shndx
,
185 Output_section
* output_section
,
186 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
191 unsupported_reloc_local(Sized_relobj
<size
, big_endian
>*,
192 unsigned int r_type
);
195 unsupported_reloc_global(Sized_relobj
<size
, big_endian
>*,
196 unsigned int r_type
, Symbol
*);
199 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
200 Target_powerpc
* target
);
203 check_non_pic(Relobj
*, unsigned int r_type
);
205 // Whether we have issued an error about a non-PIC compilation.
206 bool issued_non_pic_error_
;
209 // The class which implements relocation.
213 // Do a relocation. Return false if the caller should not issue
214 // any warnings about this relocation.
216 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
217 Output_section
*, size_t relnum
,
218 const elfcpp::Rela
<size
, big_endian
>&,
219 unsigned int r_type
, const Sized_symbol
<size
>*,
220 const Symbol_value
<size
>*,
222 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
226 // Do a TLS relocation.
228 relocate_tls(const Relocate_info
<size
, big_endian
>*,
229 Target_powerpc
* target
,
230 size_t relnum
, const elfcpp::Rela
<size
, big_endian
>&,
231 unsigned int r_type
, const Sized_symbol
<size
>*,
232 const Symbol_value
<size
>*,
234 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
238 // A class which returns the size required for a relocation type,
239 // used while scanning relocs during a relocatable link.
240 class Relocatable_size_for_reloc
244 get_size_for_reloc(unsigned int, Relobj
*);
247 // Get the GOT section, creating it if necessary.
248 Output_data_got
<size
, big_endian
>*
249 got_section(Symbol_table
*, Layout
*);
254 gold_assert (this->got2_
!= NULL
);
258 // Get the TOC section.
262 gold_assert (this->toc_
!= NULL
);
266 // Create a PLT entry for a global symbol.
268 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
270 // Create a GOT entry for the TLS module index.
272 got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
273 Sized_relobj
<size
, big_endian
>* object
);
275 // Get the PLT section.
276 const Output_data_plt_powerpc
<size
, big_endian
>*
279 gold_assert(this->plt_
!= NULL
);
283 // Get the dynamic reloc section, creating it if necessary.
285 rela_dyn_section(Layout
*);
287 // Return true if the symbol may need a COPY relocation.
288 // References from an executable object to non-function symbols
289 // defined in a dynamic object may need a COPY relocation.
291 may_need_copy_reloc(Symbol
* gsym
)
293 return (!parameters
->options().shared()
294 && gsym
->is_from_dynobj()
295 && gsym
->type() != elfcpp::STT_FUNC
);
298 // Copy a relocation against a global symbol.
300 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
301 Sized_relobj
<size
, big_endian
>* object
,
302 unsigned int shndx
, Output_section
* output_section
,
303 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
305 this->copy_relocs_
.copy_reloc(symtab
, layout
,
306 symtab
->get_sized_symbol
<size
>(sym
),
307 object
, shndx
, output_section
,
308 reloc
, this->rela_dyn_section(layout
));
311 // Information about this specific target which we pass to the
312 // general Target structure.
313 static Target::Target_info powerpc_info
;
315 // The types of GOT entries needed for this platform.
318 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
319 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
320 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
324 Output_data_got
<size
, big_endian
>* got_
;
326 Output_data_space
* got2_
;
328 Output_data_space
* toc_
;
330 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
331 // The dynamic reloc section.
332 Reloc_section
* rela_dyn_
;
333 // Relocs saved to avoid a COPY reloc.
334 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
335 // Space for variables copied with a COPY reloc.
336 Output_data_space
* dynbss_
;
337 // Offset of the GOT entry for the TLS module index;
338 unsigned int got_mod_index_offset_
;
342 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
345 true, // is_big_endian
346 elfcpp::EM_PPC
, // machine_code
347 false, // has_make_symbol
348 false, // has_resolve
349 false, // has_code_fill
350 true, // is_default_stack_executable
352 "/usr/lib/ld.so.1", // dynamic_linker
353 0x10000000, // default_text_segment_address
354 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
355 4 * 1024 // common_pagesize (overridable by -z common-page-size)
359 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
362 false, // is_big_endian
363 elfcpp::EM_PPC
, // machine_code
364 false, // has_make_symbol
365 false, // has_resolve
366 false, // has_code_fill
367 true, // is_default_stack_executable
369 "/usr/lib/ld.so.1", // dynamic_linker
370 0x10000000, // default_text_segment_address
371 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
372 4 * 1024 // common_pagesize (overridable by -z common-page-size)
376 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
379 true, // is_big_endian
380 elfcpp::EM_PPC64
, // machine_code
381 false, // has_make_symbol
382 false, // has_resolve
383 false, // has_code_fill
384 true, // is_default_stack_executable
386 "/usr/lib/ld.so.1", // dynamic_linker
387 0x10000000, // default_text_segment_address
388 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
389 8 * 1024 // common_pagesize (overridable by -z common-page-size)
393 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
396 false, // is_big_endian
397 elfcpp::EM_PPC64
, // machine_code
398 false, // has_make_symbol
399 false, // has_resolve
400 false, // has_code_fill
401 true, // is_default_stack_executable
403 "/usr/lib/ld.so.1", // dynamic_linker
404 0x10000000, // default_text_segment_address
405 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
406 8 * 1024 // common_pagesize (overridable by -z common-page-size)
409 template<int size
, bool big_endian
>
410 class Powerpc_relocate_functions
413 // Do a simple relocation with the addend in the relocation.
414 template<int valsize
>
416 rela(unsigned char* view
,
417 unsigned int right_shift
,
418 elfcpp::Elf_Xword dst_mask
,
419 typename
elfcpp::Swap
<size
, big_endian
>::Valtype value
,
420 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
422 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
423 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
424 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
425 Valtype reloc
= ((value
+ addend
) >> right_shift
);
430 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
433 // Do a simple relocation using a symbol value with the addend in
435 template<int valsize
>
437 rela(unsigned char* view
,
438 unsigned int right_shift
,
439 elfcpp::Elf_Xword dst_mask
,
440 const Sized_relobj
<size
, big_endian
>* object
,
441 const Symbol_value
<size
>* psymval
,
442 typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype addend
)
444 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
445 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
446 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
447 Valtype reloc
= (psymval
->value(object
, addend
) >> right_shift
);
452 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
455 // Do a simple relocation using a symbol value with the addend in
456 // the relocation, unaligned.
457 template<int valsize
>
459 rela_ua(unsigned char* view
, unsigned int right_shift
,
460 elfcpp::Elf_Xword dst_mask
,
461 const Sized_relobj
<size
, big_endian
>* object
,
462 const Symbol_value
<size
>* psymval
,
463 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
465 typedef typename
elfcpp::Swap_unaligned
<valsize
,
466 big_endian
>::Valtype Valtype
;
467 unsigned char* wv
= view
;
468 Valtype val
= elfcpp::Swap_unaligned
<valsize
, big_endian
>::readval(wv
);
469 Valtype reloc
= (psymval
->value(object
, addend
) >> right_shift
);
474 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
477 // Do a simple PC relative relocation with a Symbol_value with the
478 // addend in the relocation.
479 template<int valsize
>
481 pcrela(unsigned char* view
, unsigned int right_shift
,
482 elfcpp::Elf_Xword dst_mask
,
483 const Sized_relobj
<size
, big_endian
>* object
,
484 const Symbol_value
<size
>* psymval
,
485 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
486 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
488 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
489 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
490 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
491 Valtype reloc
= ((psymval
->value(object
, addend
) - address
)
497 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
500 template<int valsize
>
502 pcrela_unaligned(unsigned char* view
,
503 const Sized_relobj
<size
, big_endian
>* object
,
504 const Symbol_value
<size
>* psymval
,
505 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
506 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
508 typedef typename
elfcpp::Swap_unaligned
<valsize
,
509 big_endian
>::Valtype Valtype
;
510 unsigned char* wv
= view
;
511 Valtype reloc
= (psymval
->value(object
, addend
) - address
);
513 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(wv
, reloc
);
516 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
517 typedef Relocate_functions
<size
, big_endian
> This_reloc
;
519 // R_POWERPC_REL32: (Symbol + Addend - Address)
521 rel32(unsigned char* view
,
522 const Sized_relobj
<size
, big_endian
>* object
,
523 const Symbol_value
<size
>* psymval
,
524 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
525 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
526 { This_reloc::pcrela32(view
, object
, psymval
, addend
, address
); }
528 // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
530 rel24(unsigned char* view
,
531 const Sized_relobj
<size
, big_endian
>* object
,
532 const Symbol_value
<size
>* psymval
,
533 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
534 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
536 This::template pcrela
<32>(view
, 0, 0x03fffffc, object
,
537 psymval
, addend
, address
);
540 // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
542 rel14(unsigned char* view
,
543 const Sized_relobj
<size
, big_endian
>* object
,
544 const Symbol_value
<size
>* psymval
,
545 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
546 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
548 This::template pcrela
<32>(view
, 0, 0x0000fffc, object
,
549 psymval
, addend
, address
);
552 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
554 addr16(unsigned char* view
,
555 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
556 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
557 { This_reloc::rela16(view
, value
, addend
); }
560 addr16(unsigned char* view
,
561 const Sized_relobj
<size
, big_endian
>* object
,
562 const Symbol_value
<size
>* psymval
,
563 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
564 { This_reloc::rela16(view
, object
, psymval
, addend
); }
566 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
568 addr16_ds(unsigned char* view
,
569 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
570 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
572 This::template rela
<16>(view
, 0, 0xfffc, value
, addend
);
575 // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
577 addr16_lo(unsigned char* view
,
578 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
579 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
580 { This_reloc::rela16(view
, value
, addend
); }
583 addr16_lo(unsigned char* view
,
584 const Sized_relobj
<size
, big_endian
>* object
,
585 const Symbol_value
<size
>* psymval
,
586 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
587 { This_reloc::rela16(view
, object
, psymval
, addend
); }
589 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
591 addr16_hi(unsigned char* view
,
592 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
593 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
595 This::template rela
<16>(view
, 16, 0xffff, value
, addend
);
599 addr16_hi(unsigned char* view
,
600 const Sized_relobj
<size
, big_endian
>* object
,
601 const Symbol_value
<size
>* psymval
,
602 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
604 This::template rela
<16>(view
, 16, 0xffff, object
, psymval
, addend
);
607 // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
608 // final value of the low 16 bits of the
609 // relocation is negative, add one.
611 addr16_ha(unsigned char* view
,
612 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
613 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
615 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
617 reloc
= value
+ addend
;
623 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
627 addr16_ha(unsigned char* view
,
628 const Sized_relobj
<size
, big_endian
>* object
,
629 const Symbol_value
<size
>* psymval
,
630 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
632 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
634 reloc
= psymval
->value(object
, addend
);
640 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
643 // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff
645 rel16(unsigned char* view
,
646 const Sized_relobj
<size
, big_endian
>* object
,
647 const Symbol_value
<size
>* psymval
,
648 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
649 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
650 { This_reloc::pcrela16(view
, object
, psymval
, addend
, address
); }
652 // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
654 rel16_lo(unsigned char* view
,
655 const Sized_relobj
<size
, big_endian
>* object
,
656 const Symbol_value
<size
>* psymval
,
657 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
658 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
659 { This_reloc::pcrela16(view
, object
, psymval
, addend
, address
); }
661 // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
663 rel16_hi(unsigned char* view
,
664 const Sized_relobj
<size
, big_endian
>* object
,
665 const Symbol_value
<size
>* psymval
,
666 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
667 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
669 This::template pcrela
<16>(view
, 16, 0xffff, object
,
670 psymval
, addend
, address
);
673 // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the
674 // final value of the low 16 bits of the
675 // relocation is negative, add one.
677 rel16_ha(unsigned char* view
,
678 const Sized_relobj
<size
, big_endian
>* object
,
679 const Symbol_value
<size
>* psymval
,
680 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
681 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
683 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
685 reloc
= (psymval
->value(object
, addend
) - address
);
690 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
694 // Get the GOT section, creating it if necessary.
696 template<int size
, bool big_endian
>
697 Output_data_got
<size
, big_endian
>*
698 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
701 if (this->got_
== NULL
)
703 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
705 this->got_
= new Output_data_got
<size
, big_endian
>();
707 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
708 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
711 // Create the GOT2 or TOC in the .got section.
714 this->got2_
= new Output_data_space(4, "** GOT2");
715 layout
->add_output_section_data(".got2", elfcpp::SHT_PROGBITS
,
722 this->toc_
= new Output_data_space(8, "** TOC");
723 layout
->add_output_section_data(".toc", elfcpp::SHT_PROGBITS
,
729 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
730 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
732 0, 0, elfcpp::STT_OBJECT
,
734 elfcpp::STV_HIDDEN
, 0,
741 // Get the dynamic reloc section, creating it if necessary.
743 template<int size
, bool big_endian
>
744 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
745 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
747 if (this->rela_dyn_
== NULL
)
749 gold_assert(layout
!= NULL
);
750 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
751 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
752 elfcpp::SHF_ALLOC
, this->rela_dyn_
);
754 return this->rela_dyn_
;
757 // A class to handle the PLT data.
759 template<int size
, bool big_endian
>
760 class Output_data_plt_powerpc
: public Output_section_data
763 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
764 size
, big_endian
> Reloc_section
;
766 Output_data_plt_powerpc(Layout
*);
768 // Add an entry to the PLT.
769 void add_entry(Symbol
* gsym
);
771 // Return the .rela.plt section data.
772 const Reloc_section
* rel_plt() const
778 void do_adjust_output_section(Output_section
* os
);
781 // The size of an entry in the PLT.
782 static const int base_plt_entry_size
= (size
== 32 ? 16 : 24);
784 // Set the final size.
786 set_final_data_size()
788 unsigned int full_count
= this->count_
+ 4;
790 this->set_data_size(full_count
* base_plt_entry_size
);
793 // Write out the PLT data.
795 do_write(Output_file
*);
797 // The reloc section.
799 // The number of PLT entries.
803 // Create the PLT section. The ordinary .got section is an argument,
804 // since we need to refer to the start.
806 template<int size
, bool big_endian
>
807 Output_data_plt_powerpc
<size
, big_endian
>::Output_data_plt_powerpc(Layout
* layout
)
808 : Output_section_data(size
== 32 ? 4 : 8), count_(0)
810 this->rel_
= new Reloc_section(false);
811 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
812 elfcpp::SHF_ALLOC
, this->rel_
);
815 template<int size
, bool big_endian
>
817 Output_data_plt_powerpc
<size
, big_endian
>::do_adjust_output_section(Output_section
* os
)
822 // Add an entry to the PLT.
824 template<int size
, bool big_endian
>
826 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
828 gold_assert(!gsym
->has_plt_offset());
829 unsigned int index
= this->count_
+ + 4;
830 section_offset_type plt_offset
;
833 plt_offset
= index
* base_plt_entry_size
;
837 gsym
->set_plt_offset(plt_offset
);
841 gsym
->set_needs_dynsym_entry();
842 this->rel_
->add_global(gsym
, elfcpp::R_POWERPC_JMP_SLOT
, this,
846 static const unsigned int addis_11_11
= 0x3d6b0000;
847 static const unsigned int addis_11_30
= 0x3d7e0000;
848 static const unsigned int addis_12_12
= 0x3d8c0000;
849 static const unsigned int addi_11_11
= 0x396b0000;
850 static const unsigned int add_0_11_11
= 0x7c0b5a14;
851 static const unsigned int add_11_0_11
= 0x7d605a14;
852 static const unsigned int b
= 0x48000000;
853 static const unsigned int bcl_20_31
= 0x429f0005;
854 static const unsigned int bctr
= 0x4e800420;
855 static const unsigned int lis_11
= 0x3d600000;
856 static const unsigned int lis_12
= 0x3d800000;
857 static const unsigned int lwzu_0_12
= 0x840c0000;
858 static const unsigned int lwz_0_12
= 0x800c0000;
859 static const unsigned int lwz_11_11
= 0x816b0000;
860 static const unsigned int lwz_11_30
= 0x817e0000;
861 static const unsigned int lwz_12_12
= 0x818c0000;
862 static const unsigned int mflr_0
= 0x7c0802a6;
863 static const unsigned int mflr_12
= 0x7d8802a6;
864 static const unsigned int mtctr_0
= 0x7c0903a6;
865 static const unsigned int mtctr_11
= 0x7d6903a6;
866 static const unsigned int mtlr_0
= 0x7c0803a6;
867 static const unsigned int nop
= 0x60000000;
868 static const unsigned int sub_11_11_12
= 0x7d6c5850;
870 static const unsigned int addis_r12_r2
= 0x3d820000; /* addis %r12,%r2,xxx@ha */
871 static const unsigned int std_r2_40r1
= 0xf8410028; /* std %r2,40(%r1) */
872 static const unsigned int ld_r11_0r12
= 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */
873 static const unsigned int ld_r2_0r12
= 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */
874 /* ld %r11,xxx+16@l(%r12) */
877 // Write out the PLT.
879 template<int size
, bool big_endian
>
881 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
883 const off_t offset
= this->offset();
884 const section_size_type oview_size
=
885 convert_to_section_size_type(this->data_size());
886 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
887 unsigned char* pov
= oview
;
889 memset(pov
, 0, base_plt_entry_size
* 4);
890 pov
+= base_plt_entry_size
* 4;
892 unsigned int plt_offset
= base_plt_entry_size
* 4;
893 const unsigned int count
= this->count_
;
897 for (unsigned int i
= 0; i
< count
; i
++)
903 for (unsigned int i
= 0; i
< count
; i
++)
905 elfcpp::Swap
<32, true>::writeval(pov
+ 0x00,
906 lwz_11_30
+ plt_offset
);
907 elfcpp::Swap
<32, true>::writeval(pov
+ 0x04, mtctr_11
);
908 elfcpp::Swap
<32, true>::writeval(pov
+ 0x08, bctr
);
909 elfcpp::Swap
<32, true>::writeval(pov
+ 0x0c, nop
);
910 pov
+= base_plt_entry_size
;
911 plt_offset
+= base_plt_entry_size
;
915 gold_assert(static_cast<section_size_type
>(pov
- oview
) == oview_size
);
917 of
->write_output_view(offset
, oview_size
, oview
);
920 // Create a PLT entry for a global symbol.
922 template<int size
, bool big_endian
>
924 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
928 if (gsym
->has_plt_offset())
931 if (this->plt_
== NULL
)
933 // Create the GOT section first.
934 this->got_section(symtab
, layout
);
936 this->plt_
= new Output_data_plt_powerpc
<size
, big_endian
>(layout
);
937 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
939 | elfcpp::SHF_EXECINSTR
940 | elfcpp::SHF_WRITE
),
943 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
944 symtab
->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL
,
946 0, 0, elfcpp::STT_OBJECT
,
948 elfcpp::STV_HIDDEN
, 0,
952 this->plt_
->add_entry(gsym
);
955 // Create a GOT entry for the TLS module index.
957 template<int size
, bool big_endian
>
959 Target_powerpc
<size
, big_endian
>::got_mod_index_entry(Symbol_table
* symtab
,
961 Sized_relobj
<size
, big_endian
>* object
)
963 if (this->got_mod_index_offset_
== -1U)
965 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
966 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
967 Output_data_got
<size
, big_endian
>* got
;
968 unsigned int got_offset
;
970 got
= this->got_section(symtab
, layout
);
971 got_offset
= got
->add_constant(0);
972 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
974 got
->add_constant(0);
975 this->got_mod_index_offset_
= got_offset
;
977 return this->got_mod_index_offset_
;
980 // Optimize the TLS relocation type based on what we know about the
981 // symbol. IS_FINAL is true if the final address of this symbol is
982 // known at link time.
984 static tls::Tls_optimization
985 optimize_tls_reloc(bool /* is_final */, int r_type
)
987 // If we are generating a shared library, then we can't do anything
989 if (parameters
->options().shared())
990 return tls::TLSOPT_NONE
;
999 // Report an unsupported relocation against a local symbol.
1001 template<int size
, bool big_endian
>
1003 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
1004 Sized_relobj
<size
, big_endian
>* object
,
1005 unsigned int r_type
)
1007 gold_error(_("%s: unsupported reloc %u against local symbol"),
1008 object
->name().c_str(), r_type
);
1011 // We are about to emit a dynamic relocation of type R_TYPE. If the
1012 // dynamic linker does not support it, issue an error.
1014 template<int size
, bool big_endian
>
1016 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
1017 unsigned int r_type
)
1019 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
1021 // These are the relocation types supported by glibc for both 32-bit
1022 // and 64-bit powerpc.
1025 case elfcpp::R_POWERPC_RELATIVE
:
1026 case elfcpp::R_POWERPC_GLOB_DAT
:
1027 case elfcpp::R_POWERPC_DTPMOD
:
1028 case elfcpp::R_POWERPC_DTPREL
:
1029 case elfcpp::R_POWERPC_TPREL
:
1030 case elfcpp::R_POWERPC_JMP_SLOT
:
1031 case elfcpp::R_POWERPC_COPY
:
1032 case elfcpp::R_POWERPC_ADDR32
:
1033 case elfcpp::R_POWERPC_ADDR24
:
1034 case elfcpp::R_POWERPC_REL24
:
1045 // These are the relocation types supported only on 64-bit.
1046 case elfcpp::R_PPC64_ADDR64
:
1047 case elfcpp::R_PPC64_TPREL16_LO_DS
:
1048 case elfcpp::R_PPC64_TPREL16_DS
:
1049 case elfcpp::R_POWERPC_TPREL16
:
1050 case elfcpp::R_POWERPC_TPREL16_LO
:
1051 case elfcpp::R_POWERPC_TPREL16_HI
:
1052 case elfcpp::R_POWERPC_TPREL16_HA
:
1053 case elfcpp::R_PPC64_TPREL16_HIGHER
:
1054 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
1055 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
1056 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
1057 case elfcpp::R_PPC64_ADDR16_LO_DS
:
1058 case elfcpp::R_POWERPC_ADDR16_LO
:
1059 case elfcpp::R_POWERPC_ADDR16_HI
:
1060 case elfcpp::R_POWERPC_ADDR16_HA
:
1061 case elfcpp::R_POWERPC_ADDR30
:
1062 case elfcpp::R_PPC64_UADDR64
:
1063 case elfcpp::R_POWERPC_UADDR32
:
1064 case elfcpp::R_POWERPC_ADDR16
:
1065 case elfcpp::R_POWERPC_UADDR16
:
1066 case elfcpp::R_PPC64_ADDR16_DS
:
1067 case elfcpp::R_PPC64_ADDR16_HIGHER
:
1068 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
1069 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
1070 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
1071 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
1072 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
1073 case elfcpp::R_POWERPC_REL32
:
1074 case elfcpp::R_PPC64_REL64
:
1085 // These are the relocation types supported only on 32-bit.
1092 // This prevents us from issuing more than one error per reloc
1093 // section. But we can still wind up issuing more than one
1094 // error per object file.
1095 if (this->issued_non_pic_error_
)
1097 object
->error(_("requires unsupported dynamic reloc; "
1098 "recompile with -fPIC"));
1099 this->issued_non_pic_error_
= true;
1103 // Scan a relocation for a local symbol.
1105 template<int size
, bool big_endian
>
1107 Target_powerpc
<size
, big_endian
>::Scan::local(
1108 const General_options
&,
1109 Symbol_table
* symtab
,
1111 Target_powerpc
<size
, big_endian
>* target
,
1112 Sized_relobj
<size
, big_endian
>* object
,
1113 unsigned int data_shndx
,
1114 Output_section
* output_section
,
1115 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1116 unsigned int r_type
,
1117 const elfcpp::Sym
<size
, big_endian
>& lsym
)
1121 case elfcpp::R_POWERPC_NONE
:
1122 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1123 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1126 case elfcpp::R_PPC64_ADDR64
:
1127 case elfcpp::R_POWERPC_ADDR32
:
1128 case elfcpp::R_POWERPC_ADDR16_HA
:
1129 case elfcpp::R_POWERPC_ADDR16_LO
:
1130 // If building a shared library (or a position-independent
1131 // executable), we need to create a dynamic relocation for
1133 if (parameters
->options().output_is_position_independent())
1135 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1137 check_non_pic(object
, r_type
);
1138 if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
1140 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1141 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
1142 data_shndx
, reloc
.get_r_offset(),
1143 reloc
.get_r_addend());
1147 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1148 gold_assert(lsym
.get_st_value() == 0);
1149 rela_dyn
->add_local_relative(object
, r_sym
, r_type
,
1150 output_section
, data_shndx
,
1151 reloc
.get_r_offset(),
1152 reloc
.get_r_addend());
1157 case elfcpp::R_POWERPC_REL24
:
1158 case elfcpp::R_PPC_LOCAL24PC
:
1159 case elfcpp::R_POWERPC_REL32
:
1160 case elfcpp::R_PPC_REL16_LO
:
1161 case elfcpp::R_PPC_REL16_HA
:
1164 case elfcpp::R_POWERPC_GOT16
:
1165 case elfcpp::R_POWERPC_GOT16_LO
:
1166 case elfcpp::R_POWERPC_GOT16_HI
:
1167 case elfcpp::R_POWERPC_GOT16_HA
:
1168 case elfcpp::R_PPC64_TOC16
:
1169 case elfcpp::R_PPC64_TOC16_LO
:
1170 case elfcpp::R_PPC64_TOC16_HI
:
1171 case elfcpp::R_PPC64_TOC16_HA
:
1172 case elfcpp::R_PPC64_TOC16_DS
:
1173 case elfcpp::R_PPC64_TOC16_LO_DS
:
1175 // The symbol requires a GOT entry.
1176 Output_data_got
<size
, big_endian
>* got
;
1179 got
= target
->got_section(symtab
, layout
);
1180 r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1182 // If we are generating a shared object, we need to add a
1183 // dynamic relocation for this symbol's GOT entry.
1184 if (parameters
->options().output_is_position_independent())
1186 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
1188 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1191 off
= got
->add_constant(0);
1192 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
1193 rela_dyn
->add_local_relative(object
, r_sym
,
1194 elfcpp::R_POWERPC_RELATIVE
,
1199 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
1203 case elfcpp::R_PPC64_TOC
:
1204 // We need a GOT section.
1205 target
->got_section(symtab
, layout
);
1208 // These are relocations which should only be seen by the
1209 // dynamic linker, and should never be seen here.
1210 case elfcpp::R_POWERPC_COPY
:
1211 case elfcpp::R_POWERPC_GLOB_DAT
:
1212 case elfcpp::R_POWERPC_JMP_SLOT
:
1213 case elfcpp::R_POWERPC_RELATIVE
:
1214 case elfcpp::R_POWERPC_DTPMOD
:
1215 gold_error(_("%s: unexpected reloc %u in object file"),
1216 object
->name().c_str(), r_type
);
1220 unsupported_reloc_local(object
, r_type
);
1225 // Report an unsupported relocation against a global symbol.
1227 template<int size
, bool big_endian
>
1229 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
1230 Sized_relobj
<size
, big_endian
>* object
,
1231 unsigned int r_type
,
1234 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1235 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
1238 // Scan a relocation for a global symbol.
1240 template<int size
, bool big_endian
>
1242 Target_powerpc
<size
, big_endian
>::Scan::global(
1243 const General_options
&,
1244 Symbol_table
* symtab
,
1246 Target_powerpc
<size
, big_endian
>* target
,
1247 Sized_relobj
<size
, big_endian
>* object
,
1248 unsigned int data_shndx
,
1249 Output_section
* output_section
,
1250 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1251 unsigned int r_type
,
1256 case elfcpp::R_POWERPC_NONE
:
1257 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1258 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1261 case elfcpp::R_PPC_PLTREL24
:
1262 // If the symbol is fully resolved, this is just a PC32 reloc.
1263 // Otherwise we need a PLT entry.
1264 if (gsym
->final_value_is_known())
1266 // If building a shared library, we can also skip the PLT entry
1267 // if the symbol is defined in the output file and is protected
1269 if (gsym
->is_defined()
1270 && !gsym
->is_from_dynobj()
1271 && !gsym
->is_preemptible())
1273 target
->make_plt_entry(symtab
, layout
, gsym
);
1276 case elfcpp::R_POWERPC_ADDR16
:
1277 case elfcpp::R_POWERPC_ADDR16_LO
:
1278 case elfcpp::R_POWERPC_ADDR16_HI
:
1279 case elfcpp::R_POWERPC_ADDR16_HA
:
1280 case elfcpp::R_POWERPC_ADDR32
:
1281 case elfcpp::R_PPC64_ADDR64
:
1283 // Make a PLT entry if necessary.
1284 if (gsym
->needs_plt_entry())
1286 target
->make_plt_entry(symtab
, layout
, gsym
);
1287 // Since this is not a PC-relative relocation, we may be
1288 // taking the address of a function. In that case we need to
1289 // set the entry in the dynamic symbol table to the address of
1291 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
1292 gsym
->set_needs_dynsym_value();
1294 // Make a dynamic relocation if necessary.
1295 if (gsym
->needs_dynamic_reloc(Symbol::ABSOLUTE_REF
))
1297 if (target
->may_need_copy_reloc(gsym
))
1299 target
->copy_reloc(symtab
, layout
, object
,
1300 data_shndx
, output_section
, gsym
, reloc
);
1302 else if ((r_type
== elfcpp::R_POWERPC_ADDR32
1303 || r_type
== elfcpp::R_PPC64_ADDR64
)
1304 && gsym
->can_use_relative_reloc(false))
1306 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1307 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
1308 output_section
, object
,
1309 data_shndx
, reloc
.get_r_offset(),
1310 reloc
.get_r_addend());
1314 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1316 check_non_pic(object
, r_type
);
1317 if (gsym
->is_from_dynobj()
1318 || gsym
->is_undefined()
1319 || gsym
->is_preemptible())
1320 rela_dyn
->add_global(gsym
, r_type
, output_section
,
1322 reloc
.get_r_offset(),
1323 reloc
.get_r_addend());
1325 rela_dyn
->add_global_relative(gsym
, r_type
,
1326 output_section
, object
,
1328 reloc
.get_r_offset(),
1329 reloc
.get_r_addend());
1335 case elfcpp::R_POWERPC_REL24
:
1336 case elfcpp::R_PPC_LOCAL24PC
:
1337 case elfcpp::R_PPC_REL16
:
1338 case elfcpp::R_PPC_REL16_LO
:
1339 case elfcpp::R_PPC_REL16_HI
:
1340 case elfcpp::R_PPC_REL16_HA
:
1342 if (gsym
->needs_plt_entry())
1343 target
->make_plt_entry(symtab
, layout
, gsym
);
1344 // Make a dynamic relocation if necessary.
1345 int flags
= Symbol::NON_PIC_REF
;
1346 if (gsym
->type() == elfcpp::STT_FUNC
)
1347 flags
|= Symbol::FUNCTION_CALL
;
1348 if (gsym
->needs_dynamic_reloc(flags
))
1350 if (target
->may_need_copy_reloc(gsym
))
1352 target
->copy_reloc(symtab
, layout
, object
,
1353 data_shndx
, output_section
, gsym
,
1358 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1359 check_non_pic(object
, r_type
);
1360 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
1361 data_shndx
, reloc
.get_r_offset(),
1362 reloc
.get_r_addend());
1368 case elfcpp::R_POWERPC_GOT16
:
1369 case elfcpp::R_POWERPC_GOT16_LO
:
1370 case elfcpp::R_POWERPC_GOT16_HI
:
1371 case elfcpp::R_POWERPC_GOT16_HA
:
1372 case elfcpp::R_PPC64_TOC16
:
1373 case elfcpp::R_PPC64_TOC16_LO
:
1374 case elfcpp::R_PPC64_TOC16_HI
:
1375 case elfcpp::R_PPC64_TOC16_HA
:
1376 case elfcpp::R_PPC64_TOC16_DS
:
1377 case elfcpp::R_PPC64_TOC16_LO_DS
:
1379 // The symbol requires a GOT entry.
1380 Output_data_got
<size
, big_endian
>* got
;
1382 got
= target
->got_section(symtab
, layout
);
1383 if (gsym
->final_value_is_known())
1384 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
1387 // If this symbol is not fully resolved, we need to add a
1388 // dynamic relocation for it.
1389 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1390 if (gsym
->is_from_dynobj()
1391 || gsym
->is_undefined()
1392 || gsym
->is_preemptible())
1393 got
->add_global_with_rela(gsym
, GOT_TYPE_STANDARD
, rela_dyn
,
1394 elfcpp::R_POWERPC_GLOB_DAT
);
1395 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
1397 unsigned int off
= got
->add_constant(0);
1399 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
1400 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
1407 case elfcpp::R_PPC64_TOC
:
1408 // We need a GOT section.
1409 target
->got_section(symtab
, layout
);
1412 case elfcpp::R_POWERPC_GOT_TPREL16
:
1413 case elfcpp::R_POWERPC_TLS
:
1417 // These are relocations which should only be seen by the
1418 // dynamic linker, and should never be seen here.
1419 case elfcpp::R_POWERPC_COPY
:
1420 case elfcpp::R_POWERPC_GLOB_DAT
:
1421 case elfcpp::R_POWERPC_JMP_SLOT
:
1422 case elfcpp::R_POWERPC_RELATIVE
:
1423 case elfcpp::R_POWERPC_DTPMOD
:
1424 gold_error(_("%s: unexpected reloc %u in object file"),
1425 object
->name().c_str(), r_type
);
1429 unsupported_reloc_global(object
, r_type
, gsym
);
1434 // Process relocations for gc.
1436 template<int size
, bool big_endian
>
1438 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
1439 const General_options
& options
,
1440 Symbol_table
* symtab
,
1442 Sized_relobj
<size
, big_endian
>* object
,
1443 unsigned int data_shndx
,
1445 const unsigned char* prelocs
,
1447 Output_section
* output_section
,
1448 bool needs_special_offset_handling
,
1449 size_t local_symbol_count
,
1450 const unsigned char* plocal_symbols
)
1452 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
1453 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
1455 gold::gc_process_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
1465 needs_special_offset_handling
,
1470 // Scan relocations for a section.
1472 template<int size
, bool big_endian
>
1474 Target_powerpc
<size
, big_endian
>::scan_relocs(
1475 const General_options
& options
,
1476 Symbol_table
* symtab
,
1478 Sized_relobj
<size
, big_endian
>* object
,
1479 unsigned int data_shndx
,
1480 unsigned int sh_type
,
1481 const unsigned char* prelocs
,
1483 Output_section
* output_section
,
1484 bool needs_special_offset_handling
,
1485 size_t local_symbol_count
,
1486 const unsigned char* plocal_symbols
)
1488 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
1489 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
1490 static Output_data_space
* sdata
;
1492 if (sh_type
== elfcpp::SHT_REL
)
1494 gold_error(_("%s: unsupported REL reloc section"),
1495 object
->name().c_str());
1499 // Define _SDA_BASE_ at the start of the .sdata section.
1502 // layout->find_output_section(".sdata") == NULL
1503 sdata
= new Output_data_space(4, "** sdata");
1504 Output_section
* os
= layout
->add_output_section_data(".sdata", 0,
1506 | elfcpp::SHF_WRITE
,
1508 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1513 elfcpp::STV_HIDDEN
, 0,
1517 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
1527 needs_special_offset_handling
,
1532 // Finalize the sections.
1534 template<int size
, bool big_endian
>
1536 Target_powerpc
<size
, big_endian
>::do_finalize_sections(Layout
* layout
)
1538 // Fill in some more dynamic tags.
1539 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
1542 if (this->plt_
!= NULL
)
1544 const Output_data
* od
= this->plt_
->rel_plt();
1545 odyn
->add_section_size(elfcpp::DT_PLTRELSZ
, od
);
1546 odyn
->add_section_address(elfcpp::DT_JMPREL
, od
);
1547 odyn
->add_constant(elfcpp::DT_PLTREL
, elfcpp::DT_RELA
);
1549 odyn
->add_section_address(elfcpp::DT_PLTGOT
, this->plt_
);
1552 if (this->rela_dyn_
!= NULL
)
1554 const Output_data
* od
= this->rela_dyn_
;
1555 odyn
->add_section_address(elfcpp::DT_RELA
, od
);
1556 odyn
->add_section_size(elfcpp::DT_RELASZ
, od
);
1557 odyn
->add_constant(elfcpp::DT_RELAENT
,
1558 elfcpp::Elf_sizes
<size
>::rela_size
);
1561 if (!parameters
->options().shared())
1563 // The value of the DT_DEBUG tag is filled in by the dynamic
1564 // linker at run time, and used by the debugger.
1565 odyn
->add_constant(elfcpp::DT_DEBUG
, 0);
1569 // Emit any relocs we saved in an attempt to avoid generating COPY
1571 if (this->copy_relocs_
.any_saved_relocs())
1572 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
1575 // Perform a relocation.
1577 template<int size
, bool big_endian
>
1579 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
1580 const Relocate_info
<size
, big_endian
>* relinfo
,
1581 Target_powerpc
* target
,
1584 const elfcpp::Rela
<size
, big_endian
>& rela
,
1585 unsigned int r_type
,
1586 const Sized_symbol
<size
>* gsym
,
1587 const Symbol_value
<size
>* psymval
,
1588 unsigned char* view
,
1589 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1590 section_size_type
/* view_size */)
1592 const unsigned int toc_base_offset
= 0x8000;
1593 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
1595 // Pick the value to use for symbols defined in shared objects.
1596 Symbol_value
<size
> symval
;
1598 && gsym
->use_plt_offset(r_type
== elfcpp::R_POWERPC_REL24
1599 || r_type
== elfcpp::R_PPC_LOCAL24PC
1600 || r_type
== elfcpp::R_PPC_REL16
1601 || r_type
== elfcpp::R_PPC_REL16_LO
1602 || r_type
== elfcpp::R_PPC_REL16_HI
1603 || r_type
== elfcpp::R_PPC_REL16_HA
))
1605 elfcpp::Elf_Xword value
;
1607 value
= target
->plt_section()->address() + gsym
->plt_offset();
1609 symval
.set_output_value(value
);
1614 const Sized_relobj
<size
, big_endian
>* object
= relinfo
->object
;
1615 elfcpp::Elf_Xword addend
= rela
.get_r_addend();
1617 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
1618 // pointer points to the beginning, not the end, of the table.
1619 // So we just use the plain offset.
1620 bool have_got_offset
= false;
1621 unsigned int got_offset
= 0;
1622 unsigned int got2_offset
= 0;
1625 case elfcpp::R_PPC64_TOC16
:
1626 case elfcpp::R_PPC64_TOC16_LO
:
1627 case elfcpp::R_PPC64_TOC16_HI
:
1628 case elfcpp::R_PPC64_TOC16_HA
:
1629 case elfcpp::R_PPC64_TOC16_DS
:
1630 case elfcpp::R_PPC64_TOC16_LO_DS
:
1631 // Subtract the TOC base address.
1632 addend
-= target
->toc_section()->address() + toc_base_offset
;
1635 case elfcpp::R_POWERPC_GOT16
:
1636 case elfcpp::R_POWERPC_GOT16_LO
:
1637 case elfcpp::R_POWERPC_GOT16_HI
:
1638 case elfcpp::R_POWERPC_GOT16_HA
:
1639 case elfcpp::R_PPC64_GOT16_DS
:
1640 case elfcpp::R_PPC64_GOT16_LO_DS
:
1643 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
1644 got_offset
= gsym
->got_offset(GOT_TYPE_STANDARD
);
1648 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
1649 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
1650 got_offset
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
1652 have_got_offset
= true;
1655 // R_PPC_PLTREL24 is rather special. If non-zero,
1656 // the addend specifies the GOT pointer offset within .got2.
1657 case elfcpp::R_PPC_PLTREL24
:
1658 if (addend
>= 32768)
1660 Output_data_space
* got2
;
1661 got2
= target
->got2_section();
1662 got2_offset
= got2
->offset();
1663 addend
+= got2_offset
;
1665 have_got_offset
= true;
1674 case elfcpp::R_POWERPC_NONE
:
1675 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1676 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1679 case elfcpp::R_POWERPC_REL32
:
1680 Reloc::rel32(view
, object
, psymval
, addend
, address
);
1683 case elfcpp::R_POWERPC_REL24
:
1684 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1687 case elfcpp::R_POWERPC_REL14
:
1688 Reloc::rel14(view
, object
, psymval
, addend
, address
);
1691 case elfcpp::R_PPC_PLTREL24
:
1692 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1695 case elfcpp::R_PPC_LOCAL24PC
:
1696 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1699 case elfcpp::R_PPC64_ADDR64
:
1700 if (!parameters
->options().output_is_position_independent())
1701 Relocate_functions
<size
, big_endian
>::rela64(view
, object
,
1705 case elfcpp::R_POWERPC_ADDR32
:
1706 if (!parameters
->options().output_is_position_independent())
1707 Relocate_functions
<size
, big_endian
>::rela32(view
, object
,
1711 case elfcpp::R_POWERPC_ADDR16_LO
:
1712 Reloc::addr16_lo(view
, object
, psymval
, addend
);
1715 case elfcpp::R_POWERPC_ADDR16_HI
:
1716 Reloc::addr16_hi(view
, object
, psymval
, addend
);
1719 case elfcpp::R_POWERPC_ADDR16_HA
:
1720 Reloc::addr16_ha(view
, object
, psymval
, addend
);
1723 case elfcpp::R_PPC_REL16_LO
:
1724 Reloc::rel16_lo(view
, object
, psymval
, addend
, address
);
1727 case elfcpp::R_PPC_REL16_HI
:
1728 Reloc::rel16_lo(view
, object
, psymval
, addend
, address
);
1731 case elfcpp::R_PPC_REL16_HA
:
1732 Reloc::rel16_ha(view
, object
, psymval
, addend
, address
);
1735 case elfcpp::R_POWERPC_GOT16
:
1736 Reloc::addr16(view
, got_offset
, addend
);
1739 case elfcpp::R_POWERPC_GOT16_LO
:
1740 Reloc::addr16_lo(view
, got_offset
, addend
);
1743 case elfcpp::R_POWERPC_GOT16_HI
:
1744 Reloc::addr16_hi(view
, got_offset
, addend
);
1747 case elfcpp::R_POWERPC_GOT16_HA
:
1748 Reloc::addr16_ha(view
, got_offset
, addend
);
1751 case elfcpp::R_PPC64_TOC16
:
1752 Reloc::addr16(view
, got_offset
, addend
);
1755 case elfcpp::R_PPC64_TOC16_LO
:
1756 Reloc::addr16_lo(view
, got_offset
, addend
);
1759 case elfcpp::R_PPC64_TOC16_HI
:
1760 Reloc::addr16_hi(view
, got_offset
, addend
);
1763 case elfcpp::R_PPC64_TOC16_HA
:
1764 Reloc::addr16_ha(view
, got_offset
, addend
);
1767 case elfcpp::R_PPC64_TOC16_DS
:
1768 case elfcpp::R_PPC64_TOC16_LO_DS
:
1769 Reloc::addr16_ds(view
, got_offset
, addend
);
1772 case elfcpp::R_PPC64_TOC
:
1774 elfcpp::Elf_types
<64>::Elf_Addr value
;
1775 value
= target
->toc_section()->address() + toc_base_offset
;
1776 Relocate_functions
<64, false>::rela64(view
, value
, addend
);
1780 case elfcpp::R_POWERPC_COPY
:
1781 case elfcpp::R_POWERPC_GLOB_DAT
:
1782 case elfcpp::R_POWERPC_JMP_SLOT
:
1783 case elfcpp::R_POWERPC_RELATIVE
:
1784 // This is an outstanding tls reloc, which is unexpected when
1786 case elfcpp::R_POWERPC_DTPMOD
:
1787 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
1788 _("unexpected reloc %u in object file"),
1793 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
1794 _("unsupported reloc %u"),
1802 // Perform a TLS relocation.
1804 template<int size
, bool big_endian
>
1806 Target_powerpc
<size
, big_endian
>::Relocate::relocate_tls(
1807 const Relocate_info
<size
, big_endian
>* relinfo
,
1808 Target_powerpc
<size
, big_endian
>* target
,
1810 const elfcpp::Rela
<size
, big_endian
>& rela
,
1811 unsigned int r_type
,
1812 const Sized_symbol
<size
>* gsym
,
1813 const Symbol_value
<size
>* psymval
,
1814 unsigned char* view
,
1815 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1818 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
1819 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
1820 const Sized_relobj
<size
, big_endian
>* object
= relinfo
->object
;
1822 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
1823 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
= psymval
->value(object
, 0);
1825 const bool is_final
=
1827 ? !parameters
->options().output_is_position_independent()
1828 : gsym
->final_value_is_known());
1829 const tls::Tls_optimization optimized_type
1830 = optimize_tls_reloc(is_final
, r_type
);
1838 // Relocate section data.
1840 template<int size
, bool big_endian
>
1842 Target_powerpc
<size
, big_endian
>::relocate_section(
1843 const Relocate_info
<size
, big_endian
>* relinfo
,
1844 unsigned int sh_type
,
1845 const unsigned char* prelocs
,
1847 Output_section
* output_section
,
1848 bool needs_special_offset_handling
,
1849 unsigned char* view
,
1850 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1851 section_size_type view_size
)
1853 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
1854 typedef typename Target_powerpc
<size
, big_endian
>::Relocate Powerpc_relocate
;
1856 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1858 gold::relocate_section
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
,
1865 needs_special_offset_handling
,
1871 // Return the size of a relocation while scanning during a relocatable
1874 template<int size
, bool big_endian
>
1876 Target_powerpc
<size
, big_endian
>::Relocatable_size_for_reloc::get_size_for_reloc(
1880 // We are always SHT_RELA, so we should never get here.
1885 // Scan the relocs during a relocatable link.
1887 template<int size
, bool big_endian
>
1889 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
1890 const General_options
& options
,
1891 Symbol_table
* symtab
,
1893 Sized_relobj
<size
, big_endian
>* object
,
1894 unsigned int data_shndx
,
1895 unsigned int sh_type
,
1896 const unsigned char* prelocs
,
1898 Output_section
* output_section
,
1899 bool needs_special_offset_handling
,
1900 size_t local_symbol_count
,
1901 const unsigned char* plocal_symbols
,
1902 Relocatable_relocs
* rr
)
1904 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1906 typedef gold::Default_scan_relocatable_relocs
<elfcpp::SHT_RELA
,
1907 Relocatable_size_for_reloc
> Scan_relocatable_relocs
;
1909 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
1910 Scan_relocatable_relocs
>(
1919 needs_special_offset_handling
,
1925 // Relocate a section during a relocatable link.
1927 template<int size
, bool big_endian
>
1929 Target_powerpc
<size
, big_endian
>::relocate_for_relocatable(
1930 const Relocate_info
<size
, big_endian
>* relinfo
,
1931 unsigned int sh_type
,
1932 const unsigned char* prelocs
,
1934 Output_section
* output_section
,
1935 off_t offset_in_output_section
,
1936 const Relocatable_relocs
* rr
,
1937 unsigned char* view
,
1938 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
1939 section_size_type view_size
,
1940 unsigned char* reloc_view
,
1941 section_size_type reloc_view_size
)
1943 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1945 gold::relocate_for_relocatable
<size
, big_endian
, elfcpp::SHT_RELA
>(
1950 offset_in_output_section
,
1959 // Return the value to use for a dynamic which requires special
1960 // treatment. This is how we support equality comparisons of function
1961 // pointers across shared library boundaries, as described in the
1962 // processor specific ABI supplement.
1964 template<int size
, bool big_endian
>
1966 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
1968 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
1969 return this->plt_section()->address() + gsym
->plt_offset();
1972 // The selector for powerpc object files.
1974 template<int size
, bool big_endian
>
1975 class Target_selector_powerpc
: public Target_selector
1978 Target_selector_powerpc()
1979 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
1981 (big_endian
? "elf64-powerpc" : "elf64-powerpcle") :
1982 (big_endian
? "elf32-powerpc" : "elf32-powerpcle")))
1985 Target
* instantiated_target_
;
1987 Target
* do_recognize(int machine
, int, int)
1992 if (machine
!= elfcpp::EM_PPC64
)
1997 if (machine
!= elfcpp::EM_PPC
)
2005 return do_instantiate_target();
2008 Target
* do_instantiate_target()
2010 if (this->instantiated_target_
== NULL
)
2011 this->instantiated_target_
= new Target_powerpc
<size
, big_endian
>();
2012 return this->instantiated_target_
;
2016 Target_selector_powerpc
<32, true> target_selector_ppc32
;
2017 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
2018 Target_selector_powerpc
<64, true> target_selector_ppc64
;
2019 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
2021 } // End anonymous namespace.