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"
47 template<int size
, bool big_endian
>
48 class Output_data_plt_powerpc
;
50 template<int size
, bool big_endian
>
51 class Target_powerpc
: public Sized_target
<size
, big_endian
>
54 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
> Reloc_section
;
57 : Sized_target
<size
, big_endian
>(&powerpc_info
),
58 got_(NULL
), got2_(NULL
), toc_(NULL
),
59 plt_(NULL
), rela_dyn_(NULL
),
60 copy_relocs_(elfcpp::R_POWERPC_COPY
),
61 dynbss_(NULL
), got_mod_index_offset_(-1U)
65 // Process the relocations to determine unreferenced sections for
66 // garbage collection.
68 gc_process_relocs(Symbol_table
* symtab
,
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(Symbol_table
* symtab
,
84 Sized_relobj
<size
, big_endian
>* object
,
85 unsigned int data_shndx
,
87 const unsigned char* prelocs
,
89 Output_section
* output_section
,
90 bool needs_special_offset_handling
,
91 size_t local_symbol_count
,
92 const unsigned char* plocal_symbols
);
93 // Finalize the sections.
95 do_finalize_sections(Layout
*, const Input_objects
*);
97 // Return the value to use for a dynamic which requires special
100 do_dynsym_value(const Symbol
*) const;
102 // Relocate a section.
104 relocate_section(const Relocate_info
<size
, big_endian
>*,
105 unsigned int sh_type
,
106 const unsigned char* prelocs
,
108 Output_section
* output_section
,
109 bool needs_special_offset_handling
,
111 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
112 section_size_type view_size
,
113 const Reloc_symbol_changes
*);
115 // Scan the relocs during a relocatable link.
117 scan_relocatable_relocs(Symbol_table
* symtab
,
119 Sized_relobj
<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 Relocatable_relocs
*);
130 // Relocate a section during a relocatable link.
132 relocate_for_relocatable(const Relocate_info
<size
, big_endian
>*,
133 unsigned int sh_type
,
134 const unsigned char* prelocs
,
136 Output_section
* output_section
,
137 off_t offset_in_output_section
,
138 const Relocatable_relocs
*,
140 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
141 section_size_type view_size
,
142 unsigned char* reloc_view
,
143 section_size_type reloc_view_size
);
145 // Return whether SYM is defined by the ABI.
147 do_is_defined_by_abi(const Symbol
* sym
) const
149 return strcmp(sym
->name(), "___tls_get_addr") == 0;
152 // Return the size of the GOT section.
156 gold_assert(this->got_
!= NULL
);
157 return this->got_
->data_size();
162 // The class which scans relocations.
167 : issued_non_pic_error_(false)
171 local(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
172 Sized_relobj
<size
, big_endian
>* object
,
173 unsigned int data_shndx
,
174 Output_section
* output_section
,
175 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
176 const elfcpp::Sym
<size
, big_endian
>& lsym
);
179 global(Symbol_table
* symtab
, Layout
* layout
, Target_powerpc
* target
,
180 Sized_relobj
<size
, big_endian
>* object
,
181 unsigned int data_shndx
,
182 Output_section
* output_section
,
183 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
188 unsupported_reloc_local(Sized_relobj
<size
, big_endian
>*,
189 unsigned int r_type
);
192 unsupported_reloc_global(Sized_relobj
<size
, big_endian
>*,
193 unsigned int r_type
, Symbol
*);
196 generate_tls_call(Symbol_table
* symtab
, Layout
* layout
,
197 Target_powerpc
* target
);
200 check_non_pic(Relobj
*, unsigned int r_type
);
202 // Whether we have issued an error about a non-PIC compilation.
203 bool issued_non_pic_error_
;
206 // The class which implements relocation.
210 // Do a relocation. Return false if the caller should not issue
211 // any warnings about this relocation.
213 relocate(const Relocate_info
<size
, big_endian
>*, Target_powerpc
*,
214 Output_section
*, size_t relnum
,
215 const elfcpp::Rela
<size
, big_endian
>&,
216 unsigned int r_type
, const Sized_symbol
<size
>*,
217 const Symbol_value
<size
>*,
219 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
223 // Do a TLS relocation.
225 relocate_tls(const Relocate_info
<size
, big_endian
>*,
226 Target_powerpc
* target
,
227 size_t relnum
, const elfcpp::Rela
<size
, big_endian
>&,
228 unsigned int r_type
, const Sized_symbol
<size
>*,
229 const Symbol_value
<size
>*,
231 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
235 // A class which returns the size required for a relocation type,
236 // used while scanning relocs during a relocatable link.
237 class Relocatable_size_for_reloc
241 get_size_for_reloc(unsigned int, Relobj
*);
244 // Get the GOT section, creating it if necessary.
245 Output_data_got
<size
, big_endian
>*
246 got_section(Symbol_table
*, Layout
*);
251 gold_assert (this->got2_
!= NULL
);
255 // Get the TOC section.
259 gold_assert (this->toc_
!= NULL
);
263 // Create a PLT entry for a global symbol.
265 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
267 // Create a GOT entry for the TLS module index.
269 got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
270 Sized_relobj
<size
, big_endian
>* object
);
272 // Get the PLT section.
273 const Output_data_plt_powerpc
<size
, big_endian
>*
276 gold_assert(this->plt_
!= NULL
);
280 // Get the dynamic reloc section, creating it if necessary.
282 rela_dyn_section(Layout
*);
284 // Copy a relocation against a global symbol.
286 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
287 Sized_relobj
<size
, big_endian
>* object
,
288 unsigned int shndx
, Output_section
* output_section
,
289 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
291 this->copy_relocs_
.copy_reloc(symtab
, layout
,
292 symtab
->get_sized_symbol
<size
>(sym
),
293 object
, shndx
, output_section
,
294 reloc
, this->rela_dyn_section(layout
));
297 // Information about this specific target which we pass to the
298 // general Target structure.
299 static Target::Target_info powerpc_info
;
301 // The types of GOT entries needed for this platform.
304 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
305 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
306 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
310 Output_data_got
<size
, big_endian
>* got_
;
312 Output_data_space
* got2_
;
314 Output_data_space
* toc_
;
316 Output_data_plt_powerpc
<size
, big_endian
>* plt_
;
317 // The dynamic reloc section.
318 Reloc_section
* rela_dyn_
;
319 // Relocs saved to avoid a COPY reloc.
320 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
321 // Space for variables copied with a COPY reloc.
322 Output_data_space
* dynbss_
;
323 // Offset of the GOT entry for the TLS module index;
324 unsigned int got_mod_index_offset_
;
328 Target::Target_info Target_powerpc
<32, true>::powerpc_info
=
331 true, // is_big_endian
332 elfcpp::EM_PPC
, // machine_code
333 false, // has_make_symbol
334 false, // has_resolve
335 false, // has_code_fill
336 true, // is_default_stack_executable
338 "/usr/lib/ld.so.1", // dynamic_linker
339 0x10000000, // default_text_segment_address
340 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
341 4 * 1024, // common_pagesize (overridable by -z common-page-size)
342 elfcpp::SHN_UNDEF
, // small_common_shndx
343 elfcpp::SHN_UNDEF
, // large_common_shndx
344 0, // small_common_section_flags
345 0 // large_common_section_flags
349 Target::Target_info Target_powerpc
<32, false>::powerpc_info
=
352 false, // is_big_endian
353 elfcpp::EM_PPC
, // machine_code
354 false, // has_make_symbol
355 false, // has_resolve
356 false, // has_code_fill
357 true, // is_default_stack_executable
359 "/usr/lib/ld.so.1", // dynamic_linker
360 0x10000000, // default_text_segment_address
361 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
362 4 * 1024, // common_pagesize (overridable by -z common-page-size)
363 elfcpp::SHN_UNDEF
, // small_common_shndx
364 elfcpp::SHN_UNDEF
, // large_common_shndx
365 0, // small_common_section_flags
366 0 // large_common_section_flags
370 Target::Target_info Target_powerpc
<64, true>::powerpc_info
=
373 true, // is_big_endian
374 elfcpp::EM_PPC64
, // machine_code
375 false, // has_make_symbol
376 false, // has_resolve
377 false, // has_code_fill
378 true, // is_default_stack_executable
380 "/usr/lib/ld.so.1", // dynamic_linker
381 0x10000000, // default_text_segment_address
382 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
383 8 * 1024, // common_pagesize (overridable by -z common-page-size)
384 elfcpp::SHN_UNDEF
, // small_common_shndx
385 elfcpp::SHN_UNDEF
, // large_common_shndx
386 0, // small_common_section_flags
387 0 // large_common_section_flags
391 Target::Target_info Target_powerpc
<64, false>::powerpc_info
=
394 false, // is_big_endian
395 elfcpp::EM_PPC64
, // machine_code
396 false, // has_make_symbol
397 false, // has_resolve
398 false, // has_code_fill
399 true, // is_default_stack_executable
401 "/usr/lib/ld.so.1", // dynamic_linker
402 0x10000000, // default_text_segment_address
403 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
404 8 * 1024, // common_pagesize (overridable by -z common-page-size)
405 elfcpp::SHN_UNDEF
, // small_common_shndx
406 elfcpp::SHN_UNDEF
, // large_common_shndx
407 0, // small_common_section_flags
408 0 // large_common_section_flags
411 template<int size
, bool big_endian
>
412 class Powerpc_relocate_functions
415 // Do a simple relocation with the addend in the relocation.
416 template<int valsize
>
418 rela(unsigned char* view
,
419 unsigned int right_shift
,
420 elfcpp::Elf_Xword dst_mask
,
421 typename
elfcpp::Swap
<size
, big_endian
>::Valtype value
,
422 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
424 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
425 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
426 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
427 Valtype reloc
= ((value
+ addend
) >> right_shift
);
432 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
435 // Do a simple relocation using a symbol value with the addend in
437 template<int valsize
>
439 rela(unsigned char* view
,
440 unsigned int right_shift
,
441 elfcpp::Elf_Xword dst_mask
,
442 const Sized_relobj
<size
, big_endian
>* object
,
443 const Symbol_value
<size
>* psymval
,
444 typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype addend
)
446 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
447 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
448 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
449 Valtype reloc
= (psymval
->value(object
, addend
) >> right_shift
);
454 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
457 // Do a simple relocation using a symbol value with the addend in
458 // the relocation, unaligned.
459 template<int valsize
>
461 rela_ua(unsigned char* view
, unsigned int right_shift
,
462 elfcpp::Elf_Xword dst_mask
,
463 const Sized_relobj
<size
, big_endian
>* object
,
464 const Symbol_value
<size
>* psymval
,
465 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
)
467 typedef typename
elfcpp::Swap_unaligned
<valsize
,
468 big_endian
>::Valtype Valtype
;
469 unsigned char* wv
= view
;
470 Valtype val
= elfcpp::Swap_unaligned
<valsize
, big_endian
>::readval(wv
);
471 Valtype reloc
= (psymval
->value(object
, addend
) >> right_shift
);
476 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
479 // Do a simple PC relative relocation with a Symbol_value with the
480 // addend in the relocation.
481 template<int valsize
>
483 pcrela(unsigned char* view
, unsigned int right_shift
,
484 elfcpp::Elf_Xword dst_mask
,
485 const Sized_relobj
<size
, big_endian
>* object
,
486 const Symbol_value
<size
>* psymval
,
487 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
488 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
490 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
491 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
492 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
493 Valtype reloc
= ((psymval
->value(object
, addend
) - address
)
499 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
, val
| reloc
);
502 template<int valsize
>
504 pcrela_unaligned(unsigned char* view
,
505 const Sized_relobj
<size
, big_endian
>* object
,
506 const Symbol_value
<size
>* psymval
,
507 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
508 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
510 typedef typename
elfcpp::Swap_unaligned
<valsize
,
511 big_endian
>::Valtype Valtype
;
512 unsigned char* wv
= view
;
513 Valtype reloc
= (psymval
->value(object
, addend
) - address
);
515 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(wv
, reloc
);
518 typedef Powerpc_relocate_functions
<size
, big_endian
> This
;
519 typedef Relocate_functions
<size
, big_endian
> This_reloc
;
521 // R_POWERPC_REL32: (Symbol + Addend - Address)
523 rel32(unsigned char* view
,
524 const Sized_relobj
<size
, big_endian
>* object
,
525 const Symbol_value
<size
>* psymval
,
526 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
527 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
528 { This_reloc::pcrela32(view
, object
, psymval
, addend
, address
); }
530 // R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
532 rel24(unsigned char* view
,
533 const Sized_relobj
<size
, big_endian
>* object
,
534 const Symbol_value
<size
>* psymval
,
535 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
536 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
538 This::template pcrela
<32>(view
, 0, 0x03fffffc, object
,
539 psymval
, addend
, address
);
542 // R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
544 rel14(unsigned char* view
,
545 const Sized_relobj
<size
, big_endian
>* object
,
546 const Symbol_value
<size
>* psymval
,
547 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
548 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
550 This::template pcrela
<32>(view
, 0, 0x0000fffc, object
,
551 psymval
, addend
, address
);
554 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
556 addr16(unsigned char* view
,
557 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
558 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
559 { This_reloc::rela16(view
, value
, addend
); }
562 addr16(unsigned char* view
,
563 const Sized_relobj
<size
, big_endian
>* object
,
564 const Symbol_value
<size
>* psymval
,
565 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
566 { This_reloc::rela16(view
, object
, psymval
, addend
); }
568 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
570 addr16_ds(unsigned char* view
,
571 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
572 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
574 This::template rela
<16>(view
, 0, 0xfffc, value
, addend
);
577 // R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
579 addr16_lo(unsigned char* view
,
580 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
581 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
582 { This_reloc::rela16(view
, value
, addend
); }
585 addr16_lo(unsigned char* view
,
586 const Sized_relobj
<size
, big_endian
>* object
,
587 const Symbol_value
<size
>* psymval
,
588 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
589 { This_reloc::rela16(view
, object
, psymval
, addend
); }
591 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
593 addr16_hi(unsigned char* view
,
594 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
595 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
597 This::template rela
<16>(view
, 16, 0xffff, value
, addend
);
601 addr16_hi(unsigned char* view
,
602 const Sized_relobj
<size
, big_endian
>* object
,
603 const Symbol_value
<size
>* psymval
,
604 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
606 This::template rela
<16>(view
, 16, 0xffff, object
, psymval
, addend
);
609 // R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
610 // final value of the low 16 bits of the
611 // relocation is negative, add one.
613 addr16_ha(unsigned char* view
,
614 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
615 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
617 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
619 reloc
= value
+ addend
;
625 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
629 addr16_ha(unsigned char* view
,
630 const Sized_relobj
<size
, big_endian
>* object
,
631 const Symbol_value
<size
>* psymval
,
632 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
)
634 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
636 reloc
= psymval
->value(object
, addend
);
642 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
645 // R_PPC_REL16: (Symbol + Addend - Address) & 0xffff
647 rel16(unsigned char* view
,
648 const Sized_relobj
<size
, big_endian
>* object
,
649 const Symbol_value
<size
>* psymval
,
650 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
651 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
652 { This_reloc::pcrela16(view
, object
, psymval
, addend
, address
); }
654 // R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
656 rel16_lo(unsigned char* view
,
657 const Sized_relobj
<size
, big_endian
>* object
,
658 const Symbol_value
<size
>* psymval
,
659 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
660 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
661 { This_reloc::pcrela16(view
, object
, psymval
, addend
, address
); }
663 // R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
665 rel16_hi(unsigned char* view
,
666 const Sized_relobj
<size
, big_endian
>* object
,
667 const Symbol_value
<size
>* psymval
,
668 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
669 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
671 This::template pcrela
<16>(view
, 16, 0xffff, object
,
672 psymval
, addend
, address
);
675 // R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the
676 // final value of the low 16 bits of the
677 // relocation is negative, add one.
679 rel16_ha(unsigned char* view
,
680 const Sized_relobj
<size
, big_endian
>* object
,
681 const Symbol_value
<size
>* psymval
,
682 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
,
683 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
685 typename
elfcpp::Elf_types
<size
>::Elf_Addr reloc
;
687 reloc
= (psymval
->value(object
, addend
) - address
);
692 elfcpp::Swap
<16, big_endian
>::writeval(view
, reloc
);
696 // Get the GOT section, creating it if necessary.
698 template<int size
, bool big_endian
>
699 Output_data_got
<size
, big_endian
>*
700 Target_powerpc
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
703 if (this->got_
== NULL
)
705 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
707 this->got_
= new Output_data_got
<size
, big_endian
>();
709 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
710 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
713 // Create the GOT2 or TOC in the .got section.
716 this->got2_
= new Output_data_space(4, "** GOT2");
717 layout
->add_output_section_data(".got2", elfcpp::SHT_PROGBITS
,
724 this->toc_
= new Output_data_space(8, "** TOC");
725 layout
->add_output_section_data(".toc", elfcpp::SHT_PROGBITS
,
731 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
732 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
734 0, 0, elfcpp::STT_OBJECT
,
736 elfcpp::STV_HIDDEN
, 0,
743 // Get the dynamic reloc section, creating it if necessary.
745 template<int size
, bool big_endian
>
746 typename Target_powerpc
<size
, big_endian
>::Reloc_section
*
747 Target_powerpc
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
749 if (this->rela_dyn_
== NULL
)
751 gold_assert(layout
!= NULL
);
752 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
753 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
754 elfcpp::SHF_ALLOC
, this->rela_dyn_
);
756 return this->rela_dyn_
;
759 // A class to handle the PLT data.
761 template<int size
, bool big_endian
>
762 class Output_data_plt_powerpc
: public Output_section_data
765 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true,
766 size
, big_endian
> Reloc_section
;
768 Output_data_plt_powerpc(Layout
*);
770 // Add an entry to the PLT.
771 void add_entry(Symbol
* gsym
);
773 // Return the .rela.plt section data.
774 const Reloc_section
* rel_plt() const
780 void do_adjust_output_section(Output_section
* os
);
783 // The size of an entry in the PLT.
784 static const int base_plt_entry_size
= (size
== 32 ? 16 : 24);
786 // Set the final size.
788 set_final_data_size()
790 unsigned int full_count
= this->count_
+ 4;
792 this->set_data_size(full_count
* base_plt_entry_size
);
795 // Write out the PLT data.
797 do_write(Output_file
*);
799 // The reloc section.
801 // The number of PLT entries.
805 // Create the PLT section. The ordinary .got section is an argument,
806 // since we need to refer to the start.
808 template<int size
, bool big_endian
>
809 Output_data_plt_powerpc
<size
, big_endian
>::Output_data_plt_powerpc(Layout
* layout
)
810 : Output_section_data(size
== 32 ? 4 : 8), count_(0)
812 this->rel_
= new Reloc_section(false);
813 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
814 elfcpp::SHF_ALLOC
, this->rel_
);
817 template<int size
, bool big_endian
>
819 Output_data_plt_powerpc
<size
, big_endian
>::do_adjust_output_section(Output_section
* os
)
824 // Add an entry to the PLT.
826 template<int size
, bool big_endian
>
828 Output_data_plt_powerpc
<size
, big_endian
>::add_entry(Symbol
* gsym
)
830 gold_assert(!gsym
->has_plt_offset());
831 unsigned int index
= this->count_
+ + 4;
832 section_offset_type plt_offset
;
835 plt_offset
= index
* base_plt_entry_size
;
839 gsym
->set_plt_offset(plt_offset
);
843 gsym
->set_needs_dynsym_entry();
844 this->rel_
->add_global(gsym
, elfcpp::R_POWERPC_JMP_SLOT
, this,
848 static const unsigned int addis_11_11
= 0x3d6b0000;
849 static const unsigned int addis_11_30
= 0x3d7e0000;
850 static const unsigned int addis_12_12
= 0x3d8c0000;
851 static const unsigned int addi_11_11
= 0x396b0000;
852 static const unsigned int add_0_11_11
= 0x7c0b5a14;
853 static const unsigned int add_11_0_11
= 0x7d605a14;
854 static const unsigned int b
= 0x48000000;
855 static const unsigned int bcl_20_31
= 0x429f0005;
856 static const unsigned int bctr
= 0x4e800420;
857 static const unsigned int lis_11
= 0x3d600000;
858 static const unsigned int lis_12
= 0x3d800000;
859 static const unsigned int lwzu_0_12
= 0x840c0000;
860 static const unsigned int lwz_0_12
= 0x800c0000;
861 static const unsigned int lwz_11_11
= 0x816b0000;
862 static const unsigned int lwz_11_30
= 0x817e0000;
863 static const unsigned int lwz_12_12
= 0x818c0000;
864 static const unsigned int mflr_0
= 0x7c0802a6;
865 static const unsigned int mflr_12
= 0x7d8802a6;
866 static const unsigned int mtctr_0
= 0x7c0903a6;
867 static const unsigned int mtctr_11
= 0x7d6903a6;
868 static const unsigned int mtlr_0
= 0x7c0803a6;
869 static const unsigned int nop
= 0x60000000;
870 static const unsigned int sub_11_11_12
= 0x7d6c5850;
872 static const unsigned int addis_r12_r2
= 0x3d820000; /* addis %r12,%r2,xxx@ha */
873 static const unsigned int std_r2_40r1
= 0xf8410028; /* std %r2,40(%r1) */
874 static const unsigned int ld_r11_0r12
= 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */
875 static const unsigned int ld_r2_0r12
= 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */
876 /* ld %r11,xxx+16@l(%r12) */
879 // Write out the PLT.
881 template<int size
, bool big_endian
>
883 Output_data_plt_powerpc
<size
, big_endian
>::do_write(Output_file
* of
)
885 const off_t offset
= this->offset();
886 const section_size_type oview_size
=
887 convert_to_section_size_type(this->data_size());
888 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
889 unsigned char* pov
= oview
;
891 memset(pov
, 0, base_plt_entry_size
* 4);
892 pov
+= base_plt_entry_size
* 4;
894 unsigned int plt_offset
= base_plt_entry_size
* 4;
895 const unsigned int count
= this->count_
;
899 for (unsigned int i
= 0; i
< count
; i
++)
905 for (unsigned int i
= 0; i
< count
; i
++)
907 elfcpp::Swap
<32, true>::writeval(pov
+ 0x00,
908 lwz_11_30
+ plt_offset
);
909 elfcpp::Swap
<32, true>::writeval(pov
+ 0x04, mtctr_11
);
910 elfcpp::Swap
<32, true>::writeval(pov
+ 0x08, bctr
);
911 elfcpp::Swap
<32, true>::writeval(pov
+ 0x0c, nop
);
912 pov
+= base_plt_entry_size
;
913 plt_offset
+= base_plt_entry_size
;
917 gold_assert(static_cast<section_size_type
>(pov
- oview
) == oview_size
);
919 of
->write_output_view(offset
, oview_size
, oview
);
922 // Create a PLT entry for a global symbol.
924 template<int size
, bool big_endian
>
926 Target_powerpc
<size
, big_endian
>::make_plt_entry(Symbol_table
* symtab
,
930 if (gsym
->has_plt_offset())
933 if (this->plt_
== NULL
)
935 // Create the GOT section first.
936 this->got_section(symtab
, layout
);
938 this->plt_
= new Output_data_plt_powerpc
<size
, big_endian
>(layout
);
939 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
941 | elfcpp::SHF_EXECINSTR
942 | elfcpp::SHF_WRITE
),
945 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
946 symtab
->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL
,
948 0, 0, elfcpp::STT_OBJECT
,
950 elfcpp::STV_HIDDEN
, 0,
954 this->plt_
->add_entry(gsym
);
957 // Create a GOT entry for the TLS module index.
959 template<int size
, bool big_endian
>
961 Target_powerpc
<size
, big_endian
>::got_mod_index_entry(Symbol_table
* symtab
,
963 Sized_relobj
<size
, big_endian
>* object
)
965 if (this->got_mod_index_offset_
== -1U)
967 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
968 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
969 Output_data_got
<size
, big_endian
>* got
;
970 unsigned int got_offset
;
972 got
= this->got_section(symtab
, layout
);
973 got_offset
= got
->add_constant(0);
974 rela_dyn
->add_local(object
, 0, elfcpp::R_POWERPC_DTPMOD
, got
,
976 got
->add_constant(0);
977 this->got_mod_index_offset_
= got_offset
;
979 return this->got_mod_index_offset_
;
982 // Optimize the TLS relocation type based on what we know about the
983 // symbol. IS_FINAL is true if the final address of this symbol is
984 // known at link time.
986 static tls::Tls_optimization
987 optimize_tls_reloc(bool /* is_final */, int r_type
)
989 // If we are generating a shared library, then we can't do anything
991 if (parameters
->options().shared())
992 return tls::TLSOPT_NONE
;
1001 // Report an unsupported relocation against a local symbol.
1003 template<int size
, bool big_endian
>
1005 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_local(
1006 Sized_relobj
<size
, big_endian
>* object
,
1007 unsigned int r_type
)
1009 gold_error(_("%s: unsupported reloc %u against local symbol"),
1010 object
->name().c_str(), r_type
);
1013 // We are about to emit a dynamic relocation of type R_TYPE. If the
1014 // dynamic linker does not support it, issue an error.
1016 template<int size
, bool big_endian
>
1018 Target_powerpc
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
1019 unsigned int r_type
)
1021 gold_assert(r_type
!= elfcpp::R_POWERPC_NONE
);
1023 // These are the relocation types supported by glibc for both 32-bit
1024 // and 64-bit powerpc.
1027 case elfcpp::R_POWERPC_RELATIVE
:
1028 case elfcpp::R_POWERPC_GLOB_DAT
:
1029 case elfcpp::R_POWERPC_DTPMOD
:
1030 case elfcpp::R_POWERPC_DTPREL
:
1031 case elfcpp::R_POWERPC_TPREL
:
1032 case elfcpp::R_POWERPC_JMP_SLOT
:
1033 case elfcpp::R_POWERPC_COPY
:
1034 case elfcpp::R_POWERPC_ADDR32
:
1035 case elfcpp::R_POWERPC_ADDR24
:
1036 case elfcpp::R_POWERPC_REL24
:
1047 // These are the relocation types supported only on 64-bit.
1048 case elfcpp::R_PPC64_ADDR64
:
1049 case elfcpp::R_PPC64_TPREL16_LO_DS
:
1050 case elfcpp::R_PPC64_TPREL16_DS
:
1051 case elfcpp::R_POWERPC_TPREL16
:
1052 case elfcpp::R_POWERPC_TPREL16_LO
:
1053 case elfcpp::R_POWERPC_TPREL16_HI
:
1054 case elfcpp::R_POWERPC_TPREL16_HA
:
1055 case elfcpp::R_PPC64_TPREL16_HIGHER
:
1056 case elfcpp::R_PPC64_TPREL16_HIGHEST
:
1057 case elfcpp::R_PPC64_TPREL16_HIGHERA
:
1058 case elfcpp::R_PPC64_TPREL16_HIGHESTA
:
1059 case elfcpp::R_PPC64_ADDR16_LO_DS
:
1060 case elfcpp::R_POWERPC_ADDR16_LO
:
1061 case elfcpp::R_POWERPC_ADDR16_HI
:
1062 case elfcpp::R_POWERPC_ADDR16_HA
:
1063 case elfcpp::R_POWERPC_ADDR30
:
1064 case elfcpp::R_PPC64_UADDR64
:
1065 case elfcpp::R_POWERPC_UADDR32
:
1066 case elfcpp::R_POWERPC_ADDR16
:
1067 case elfcpp::R_POWERPC_UADDR16
:
1068 case elfcpp::R_PPC64_ADDR16_DS
:
1069 case elfcpp::R_PPC64_ADDR16_HIGHER
:
1070 case elfcpp::R_PPC64_ADDR16_HIGHEST
:
1071 case elfcpp::R_PPC64_ADDR16_HIGHERA
:
1072 case elfcpp::R_PPC64_ADDR16_HIGHESTA
:
1073 case elfcpp::R_POWERPC_ADDR14_BRTAKEN
:
1074 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN
:
1075 case elfcpp::R_POWERPC_REL32
:
1076 case elfcpp::R_PPC64_REL64
:
1087 // These are the relocation types supported only on 32-bit.
1094 // This prevents us from issuing more than one error per reloc
1095 // section. But we can still wind up issuing more than one
1096 // error per object file.
1097 if (this->issued_non_pic_error_
)
1099 gold_assert(parameters
->options().output_is_position_independent());
1100 object
->error(_("requires unsupported dynamic reloc; "
1101 "recompile with -fPIC"));
1102 this->issued_non_pic_error_
= true;
1106 // Scan a relocation for a local symbol.
1108 template<int size
, bool big_endian
>
1110 Target_powerpc
<size
, big_endian
>::Scan::local(
1111 Symbol_table
* symtab
,
1113 Target_powerpc
<size
, big_endian
>* target
,
1114 Sized_relobj
<size
, big_endian
>* object
,
1115 unsigned int data_shndx
,
1116 Output_section
* output_section
,
1117 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1118 unsigned int r_type
,
1119 const elfcpp::Sym
<size
, big_endian
>& lsym
)
1123 case elfcpp::R_POWERPC_NONE
:
1124 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1125 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1128 case elfcpp::R_PPC64_ADDR64
:
1129 case elfcpp::R_POWERPC_ADDR32
:
1130 case elfcpp::R_POWERPC_ADDR16_HA
:
1131 case elfcpp::R_POWERPC_ADDR16_LO
:
1132 // If building a shared library (or a position-independent
1133 // executable), we need to create a dynamic relocation for
1135 if (parameters
->options().output_is_position_independent())
1137 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1139 check_non_pic(object
, r_type
);
1140 if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
1142 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1143 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
1144 data_shndx
, reloc
.get_r_offset(),
1145 reloc
.get_r_addend());
1149 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1150 gold_assert(lsym
.get_st_value() == 0);
1151 rela_dyn
->add_local_relative(object
, r_sym
, r_type
,
1152 output_section
, data_shndx
,
1153 reloc
.get_r_offset(),
1154 reloc
.get_r_addend());
1159 case elfcpp::R_POWERPC_REL24
:
1160 case elfcpp::R_PPC_LOCAL24PC
:
1161 case elfcpp::R_POWERPC_REL32
:
1162 case elfcpp::R_PPC_REL16_LO
:
1163 case elfcpp::R_PPC_REL16_HA
:
1166 case elfcpp::R_POWERPC_GOT16
:
1167 case elfcpp::R_POWERPC_GOT16_LO
:
1168 case elfcpp::R_POWERPC_GOT16_HI
:
1169 case elfcpp::R_POWERPC_GOT16_HA
:
1170 case elfcpp::R_PPC64_TOC16
:
1171 case elfcpp::R_PPC64_TOC16_LO
:
1172 case elfcpp::R_PPC64_TOC16_HI
:
1173 case elfcpp::R_PPC64_TOC16_HA
:
1174 case elfcpp::R_PPC64_TOC16_DS
:
1175 case elfcpp::R_PPC64_TOC16_LO_DS
:
1177 // The symbol requires a GOT entry.
1178 Output_data_got
<size
, big_endian
>* got
;
1181 got
= target
->got_section(symtab
, layout
);
1182 r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
1184 // If we are generating a shared object, we need to add a
1185 // dynamic relocation for this symbol's GOT entry.
1186 if (parameters
->options().output_is_position_independent())
1188 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
))
1190 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1193 off
= got
->add_constant(0);
1194 object
->set_local_got_offset(r_sym
, GOT_TYPE_STANDARD
, off
);
1195 rela_dyn
->add_local_relative(object
, r_sym
,
1196 elfcpp::R_POWERPC_RELATIVE
,
1201 got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
1205 case elfcpp::R_PPC64_TOC
:
1206 // We need a GOT section.
1207 target
->got_section(symtab
, layout
);
1210 // These are relocations which should only be seen by the
1211 // dynamic linker, and should never be seen here.
1212 case elfcpp::R_POWERPC_COPY
:
1213 case elfcpp::R_POWERPC_GLOB_DAT
:
1214 case elfcpp::R_POWERPC_JMP_SLOT
:
1215 case elfcpp::R_POWERPC_RELATIVE
:
1216 case elfcpp::R_POWERPC_DTPMOD
:
1217 gold_error(_("%s: unexpected reloc %u in object file"),
1218 object
->name().c_str(), r_type
);
1222 unsupported_reloc_local(object
, r_type
);
1227 // Report an unsupported relocation against a global symbol.
1229 template<int size
, bool big_endian
>
1231 Target_powerpc
<size
, big_endian
>::Scan::unsupported_reloc_global(
1232 Sized_relobj
<size
, big_endian
>* object
,
1233 unsigned int r_type
,
1236 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
1237 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
1240 // Scan a relocation for a global symbol.
1242 template<int size
, bool big_endian
>
1244 Target_powerpc
<size
, big_endian
>::Scan::global(
1245 Symbol_table
* symtab
,
1247 Target_powerpc
<size
, big_endian
>* target
,
1248 Sized_relobj
<size
, big_endian
>* object
,
1249 unsigned int data_shndx
,
1250 Output_section
* output_section
,
1251 const elfcpp::Rela
<size
, big_endian
>& reloc
,
1252 unsigned int r_type
,
1257 case elfcpp::R_POWERPC_NONE
:
1258 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1259 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1262 case elfcpp::R_PPC_PLTREL24
:
1263 // If the symbol is fully resolved, this is just a PC32 reloc.
1264 // Otherwise we need a PLT entry.
1265 if (gsym
->final_value_is_known())
1267 // If building a shared library, we can also skip the PLT entry
1268 // if the symbol is defined in the output file and is protected
1270 if (gsym
->is_defined()
1271 && !gsym
->is_from_dynobj()
1272 && !gsym
->is_preemptible())
1274 target
->make_plt_entry(symtab
, layout
, gsym
);
1277 case elfcpp::R_POWERPC_ADDR16
:
1278 case elfcpp::R_POWERPC_ADDR16_LO
:
1279 case elfcpp::R_POWERPC_ADDR16_HI
:
1280 case elfcpp::R_POWERPC_ADDR16_HA
:
1281 case elfcpp::R_POWERPC_ADDR32
:
1282 case elfcpp::R_PPC64_ADDR64
:
1284 // Make a PLT entry if necessary.
1285 if (gsym
->needs_plt_entry())
1287 target
->make_plt_entry(symtab
, layout
, gsym
);
1288 // Since this is not a PC-relative relocation, we may be
1289 // taking the address of a function. In that case we need to
1290 // set the entry in the dynamic symbol table to the address of
1292 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
1293 gsym
->set_needs_dynsym_value();
1295 // Make a dynamic relocation if necessary.
1296 if (gsym
->needs_dynamic_reloc(Symbol::ABSOLUTE_REF
))
1298 if (gsym
->may_need_copy_reloc())
1300 target
->copy_reloc(symtab
, layout
, object
,
1301 data_shndx
, output_section
, gsym
, reloc
);
1303 else if ((r_type
== elfcpp::R_POWERPC_ADDR32
1304 || r_type
== elfcpp::R_PPC64_ADDR64
)
1305 && gsym
->can_use_relative_reloc(false))
1307 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1308 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
1309 output_section
, object
,
1310 data_shndx
, reloc
.get_r_offset(),
1311 reloc
.get_r_addend());
1315 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1317 check_non_pic(object
, r_type
);
1318 if (gsym
->is_from_dynobj()
1319 || gsym
->is_undefined()
1320 || gsym
->is_preemptible())
1321 rela_dyn
->add_global(gsym
, r_type
, output_section
,
1323 reloc
.get_r_offset(),
1324 reloc
.get_r_addend());
1326 rela_dyn
->add_global_relative(gsym
, r_type
,
1327 output_section
, object
,
1329 reloc
.get_r_offset(),
1330 reloc
.get_r_addend());
1336 case elfcpp::R_POWERPC_REL24
:
1337 case elfcpp::R_PPC_LOCAL24PC
:
1338 case elfcpp::R_PPC_REL16
:
1339 case elfcpp::R_PPC_REL16_LO
:
1340 case elfcpp::R_PPC_REL16_HI
:
1341 case elfcpp::R_PPC_REL16_HA
:
1343 if (gsym
->needs_plt_entry())
1344 target
->make_plt_entry(symtab
, layout
, gsym
);
1345 // Make a dynamic relocation if necessary.
1346 int flags
= Symbol::NON_PIC_REF
;
1347 if (gsym
->type() == elfcpp::STT_FUNC
)
1348 flags
|= Symbol::FUNCTION_CALL
;
1349 if (gsym
->needs_dynamic_reloc(flags
))
1351 if (gsym
->may_need_copy_reloc())
1353 target
->copy_reloc(symtab
, layout
, object
,
1354 data_shndx
, output_section
, gsym
,
1359 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1360 check_non_pic(object
, r_type
);
1361 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
1362 data_shndx
, reloc
.get_r_offset(),
1363 reloc
.get_r_addend());
1369 case elfcpp::R_POWERPC_GOT16
:
1370 case elfcpp::R_POWERPC_GOT16_LO
:
1371 case elfcpp::R_POWERPC_GOT16_HI
:
1372 case elfcpp::R_POWERPC_GOT16_HA
:
1373 case elfcpp::R_PPC64_TOC16
:
1374 case elfcpp::R_PPC64_TOC16_LO
:
1375 case elfcpp::R_PPC64_TOC16_HI
:
1376 case elfcpp::R_PPC64_TOC16_HA
:
1377 case elfcpp::R_PPC64_TOC16_DS
:
1378 case elfcpp::R_PPC64_TOC16_LO_DS
:
1380 // The symbol requires a GOT entry.
1381 Output_data_got
<size
, big_endian
>* got
;
1383 got
= target
->got_section(symtab
, layout
);
1384 if (gsym
->final_value_is_known())
1385 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
1388 // If this symbol is not fully resolved, we need to add a
1389 // dynamic relocation for it.
1390 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
1391 if (gsym
->is_from_dynobj()
1392 || gsym
->is_undefined()
1393 || gsym
->is_preemptible())
1394 got
->add_global_with_rela(gsym
, GOT_TYPE_STANDARD
, rela_dyn
,
1395 elfcpp::R_POWERPC_GLOB_DAT
);
1396 else if (!gsym
->has_got_offset(GOT_TYPE_STANDARD
))
1398 unsigned int off
= got
->add_constant(0);
1400 gsym
->set_got_offset(GOT_TYPE_STANDARD
, off
);
1401 rela_dyn
->add_global_relative(gsym
, elfcpp::R_POWERPC_RELATIVE
,
1408 case elfcpp::R_PPC64_TOC
:
1409 // We need a GOT section.
1410 target
->got_section(symtab
, layout
);
1413 case elfcpp::R_POWERPC_GOT_TPREL16
:
1414 case elfcpp::R_POWERPC_TLS
:
1418 // These are relocations which should only be seen by the
1419 // dynamic linker, and should never be seen here.
1420 case elfcpp::R_POWERPC_COPY
:
1421 case elfcpp::R_POWERPC_GLOB_DAT
:
1422 case elfcpp::R_POWERPC_JMP_SLOT
:
1423 case elfcpp::R_POWERPC_RELATIVE
:
1424 case elfcpp::R_POWERPC_DTPMOD
:
1425 gold_error(_("%s: unexpected reloc %u in object file"),
1426 object
->name().c_str(), r_type
);
1430 unsupported_reloc_global(object
, r_type
, gsym
);
1435 // Process relocations for gc.
1437 template<int size
, bool big_endian
>
1439 Target_powerpc
<size
, big_endian
>::gc_process_relocs(
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
>(
1464 needs_special_offset_handling
,
1469 // Scan relocations for a section.
1471 template<int size
, bool big_endian
>
1473 Target_powerpc
<size
, big_endian
>::scan_relocs(
1474 Symbol_table
* symtab
,
1476 Sized_relobj
<size
, big_endian
>* object
,
1477 unsigned int data_shndx
,
1478 unsigned int sh_type
,
1479 const unsigned char* prelocs
,
1481 Output_section
* output_section
,
1482 bool needs_special_offset_handling
,
1483 size_t local_symbol_count
,
1484 const unsigned char* plocal_symbols
)
1486 typedef Target_powerpc
<size
, big_endian
> Powerpc
;
1487 typedef typename Target_powerpc
<size
, big_endian
>::Scan Scan
;
1488 static Output_data_space
* sdata
;
1490 if (sh_type
== elfcpp::SHT_REL
)
1492 gold_error(_("%s: unsupported REL reloc section"),
1493 object
->name().c_str());
1497 // Define _SDA_BASE_ at the start of the .sdata section.
1500 // layout->find_output_section(".sdata") == NULL
1501 sdata
= new Output_data_space(4, "** sdata");
1502 Output_section
* os
= layout
->add_output_section_data(".sdata", 0,
1504 | elfcpp::SHF_WRITE
,
1506 symtab
->define_in_output_data("_SDA_BASE_", NULL
,
1511 elfcpp::STV_HIDDEN
, 0,
1515 gold::scan_relocs
<size
, big_endian
, Powerpc
, elfcpp::SHT_RELA
, Scan
>(
1524 needs_special_offset_handling
,
1529 // Finalize the sections.
1531 template<int size
, bool big_endian
>
1533 Target_powerpc
<size
, big_endian
>::do_finalize_sections(
1535 const Input_objects
*)
1537 // Fill in some more dynamic tags.
1538 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
1541 if (this->plt_
!= NULL
)
1543 const Output_data
* od
= this->plt_
->rel_plt();
1544 odyn
->add_section_size(elfcpp::DT_PLTRELSZ
, od
);
1545 odyn
->add_section_address(elfcpp::DT_JMPREL
, od
);
1546 odyn
->add_constant(elfcpp::DT_PLTREL
, elfcpp::DT_RELA
);
1548 odyn
->add_section_address(elfcpp::DT_PLTGOT
, this->plt_
);
1551 if (this->rela_dyn_
!= NULL
)
1553 const Output_data
* od
= this->rela_dyn_
;
1554 odyn
->add_section_address(elfcpp::DT_RELA
, od
);
1555 odyn
->add_section_size(elfcpp::DT_RELASZ
, od
);
1556 odyn
->add_constant(elfcpp::DT_RELAENT
,
1557 elfcpp::Elf_sizes
<size
>::rela_size
);
1560 if (!parameters
->options().shared())
1562 // The value of the DT_DEBUG tag is filled in by the dynamic
1563 // linker at run time, and used by the debugger.
1564 odyn
->add_constant(elfcpp::DT_DEBUG
, 0);
1568 // Emit any relocs we saved in an attempt to avoid generating COPY
1570 if (this->copy_relocs_
.any_saved_relocs())
1571 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
1574 // Perform a relocation.
1576 template<int size
, bool big_endian
>
1578 Target_powerpc
<size
, big_endian
>::Relocate::relocate(
1579 const Relocate_info
<size
, big_endian
>* relinfo
,
1580 Target_powerpc
* target
,
1583 const elfcpp::Rela
<size
, big_endian
>& rela
,
1584 unsigned int r_type
,
1585 const Sized_symbol
<size
>* gsym
,
1586 const Symbol_value
<size
>* psymval
,
1587 unsigned char* view
,
1588 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1589 section_size_type
/* view_size */)
1591 const unsigned int toc_base_offset
= 0x8000;
1592 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
1594 // Pick the value to use for symbols defined in shared objects.
1595 Symbol_value
<size
> symval
;
1597 && gsym
->use_plt_offset(r_type
== elfcpp::R_POWERPC_REL24
1598 || r_type
== elfcpp::R_PPC_LOCAL24PC
1599 || r_type
== elfcpp::R_PPC_REL16
1600 || r_type
== elfcpp::R_PPC_REL16_LO
1601 || r_type
== elfcpp::R_PPC_REL16_HI
1602 || r_type
== elfcpp::R_PPC_REL16_HA
))
1604 elfcpp::Elf_Xword value
;
1606 value
= target
->plt_section()->address() + gsym
->plt_offset();
1608 symval
.set_output_value(value
);
1613 const Sized_relobj
<size
, big_endian
>* object
= relinfo
->object
;
1614 elfcpp::Elf_Xword addend
= rela
.get_r_addend();
1616 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
1617 // pointer points to the beginning, not the end, of the table.
1618 // So we just use the plain offset.
1619 bool have_got_offset
= false;
1620 unsigned int got_offset
= 0;
1621 unsigned int got2_offset
= 0;
1624 case elfcpp::R_PPC64_TOC16
:
1625 case elfcpp::R_PPC64_TOC16_LO
:
1626 case elfcpp::R_PPC64_TOC16_HI
:
1627 case elfcpp::R_PPC64_TOC16_HA
:
1628 case elfcpp::R_PPC64_TOC16_DS
:
1629 case elfcpp::R_PPC64_TOC16_LO_DS
:
1630 // Subtract the TOC base address.
1631 addend
-= target
->toc_section()->address() + toc_base_offset
;
1634 case elfcpp::R_POWERPC_GOT16
:
1635 case elfcpp::R_POWERPC_GOT16_LO
:
1636 case elfcpp::R_POWERPC_GOT16_HI
:
1637 case elfcpp::R_POWERPC_GOT16_HA
:
1638 case elfcpp::R_PPC64_GOT16_DS
:
1639 case elfcpp::R_PPC64_GOT16_LO_DS
:
1642 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
1643 got_offset
= gsym
->got_offset(GOT_TYPE_STANDARD
);
1647 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
1648 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
1649 got_offset
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
1651 have_got_offset
= true;
1654 // R_PPC_PLTREL24 is rather special. If non-zero,
1655 // the addend specifies the GOT pointer offset within .got2.
1656 case elfcpp::R_PPC_PLTREL24
:
1657 if (addend
>= 32768)
1659 Output_data_space
* got2
;
1660 got2
= target
->got2_section();
1661 got2_offset
= got2
->offset();
1662 addend
+= got2_offset
;
1664 have_got_offset
= true;
1673 case elfcpp::R_POWERPC_NONE
:
1674 case elfcpp::R_POWERPC_GNU_VTINHERIT
:
1675 case elfcpp::R_POWERPC_GNU_VTENTRY
:
1678 case elfcpp::R_POWERPC_REL32
:
1679 Reloc::rel32(view
, object
, psymval
, addend
, address
);
1682 case elfcpp::R_POWERPC_REL24
:
1683 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1686 case elfcpp::R_POWERPC_REL14
:
1687 Reloc::rel14(view
, object
, psymval
, addend
, address
);
1690 case elfcpp::R_PPC_PLTREL24
:
1691 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1694 case elfcpp::R_PPC_LOCAL24PC
:
1695 Reloc::rel24(view
, object
, psymval
, addend
, address
);
1698 case elfcpp::R_PPC64_ADDR64
:
1699 if (!parameters
->options().output_is_position_independent())
1700 Relocate_functions
<size
, big_endian
>::rela64(view
, object
,
1704 case elfcpp::R_POWERPC_ADDR32
:
1705 if (!parameters
->options().output_is_position_independent())
1706 Relocate_functions
<size
, big_endian
>::rela32(view
, object
,
1710 case elfcpp::R_POWERPC_ADDR16_LO
:
1711 Reloc::addr16_lo(view
, object
, psymval
, addend
);
1714 case elfcpp::R_POWERPC_ADDR16_HI
:
1715 Reloc::addr16_hi(view
, object
, psymval
, addend
);
1718 case elfcpp::R_POWERPC_ADDR16_HA
:
1719 Reloc::addr16_ha(view
, object
, psymval
, addend
);
1722 case elfcpp::R_PPC_REL16_LO
:
1723 Reloc::rel16_lo(view
, object
, psymval
, addend
, address
);
1726 case elfcpp::R_PPC_REL16_HI
:
1727 Reloc::rel16_lo(view
, object
, psymval
, addend
, address
);
1730 case elfcpp::R_PPC_REL16_HA
:
1731 Reloc::rel16_ha(view
, object
, psymval
, addend
, address
);
1734 case elfcpp::R_POWERPC_GOT16
:
1735 Reloc::addr16(view
, got_offset
, addend
);
1738 case elfcpp::R_POWERPC_GOT16_LO
:
1739 Reloc::addr16_lo(view
, got_offset
, addend
);
1742 case elfcpp::R_POWERPC_GOT16_HI
:
1743 Reloc::addr16_hi(view
, got_offset
, addend
);
1746 case elfcpp::R_POWERPC_GOT16_HA
:
1747 Reloc::addr16_ha(view
, got_offset
, addend
);
1750 case elfcpp::R_PPC64_TOC16
:
1751 Reloc::addr16(view
, got_offset
, addend
);
1754 case elfcpp::R_PPC64_TOC16_LO
:
1755 Reloc::addr16_lo(view
, got_offset
, addend
);
1758 case elfcpp::R_PPC64_TOC16_HI
:
1759 Reloc::addr16_hi(view
, got_offset
, addend
);
1762 case elfcpp::R_PPC64_TOC16_HA
:
1763 Reloc::addr16_ha(view
, got_offset
, addend
);
1766 case elfcpp::R_PPC64_TOC16_DS
:
1767 case elfcpp::R_PPC64_TOC16_LO_DS
:
1768 Reloc::addr16_ds(view
, got_offset
, addend
);
1771 case elfcpp::R_PPC64_TOC
:
1773 elfcpp::Elf_types
<64>::Elf_Addr value
;
1774 value
= target
->toc_section()->address() + toc_base_offset
;
1775 Relocate_functions
<64, false>::rela64(view
, value
, addend
);
1779 case elfcpp::R_POWERPC_COPY
:
1780 case elfcpp::R_POWERPC_GLOB_DAT
:
1781 case elfcpp::R_POWERPC_JMP_SLOT
:
1782 case elfcpp::R_POWERPC_RELATIVE
:
1783 // This is an outstanding tls reloc, which is unexpected when
1785 case elfcpp::R_POWERPC_DTPMOD
:
1786 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
1787 _("unexpected reloc %u in object file"),
1792 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
1793 _("unsupported reloc %u"),
1801 // Perform a TLS relocation.
1803 template<int size
, bool big_endian
>
1805 Target_powerpc
<size
, big_endian
>::Relocate::relocate_tls(
1806 const Relocate_info
<size
, big_endian
>* relinfo
,
1807 Target_powerpc
<size
, big_endian
>* target
,
1809 const elfcpp::Rela
<size
, big_endian
>& rela
,
1810 unsigned int r_type
,
1811 const Sized_symbol
<size
>* gsym
,
1812 const Symbol_value
<size
>* psymval
,
1813 unsigned char* view
,
1814 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1817 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
1818 typedef Powerpc_relocate_functions
<size
, big_endian
> Reloc
;
1819 const Sized_relobj
<size
, big_endian
>* object
= relinfo
->object
;
1821 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
1822 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
= psymval
->value(object
, 0);
1824 const bool is_final
=
1826 ? !parameters
->options().output_is_position_independent()
1827 : gsym
->final_value_is_known());
1828 const tls::Tls_optimization optimized_type
1829 = optimize_tls_reloc(is_final
, r_type
);
1837 // Relocate section data.
1839 template<int size
, bool big_endian
>
1841 Target_powerpc
<size
, big_endian
>::relocate_section(
1842 const Relocate_info
<size
, big_endian
>* relinfo
,
1843 unsigned int sh_type
,
1844 const unsigned char* prelocs
,
1846 Output_section
* output_section
,
1847 bool needs_special_offset_handling
,
1848 unsigned char* view
,
1849 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1850 section_size_type view_size
,
1851 const Reloc_symbol_changes
* reloc_symbol_changes
)
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
,
1869 reloc_symbol_changes
);
1872 // Return the size of a relocation while scanning during a relocatable
1875 template<int size
, bool big_endian
>
1877 Target_powerpc
<size
, big_endian
>::Relocatable_size_for_reloc::get_size_for_reloc(
1881 // We are always SHT_RELA, so we should never get here.
1886 // Scan the relocs during a relocatable link.
1888 template<int size
, bool big_endian
>
1890 Target_powerpc
<size
, big_endian
>::scan_relocatable_relocs(
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
>(
1918 needs_special_offset_handling
,
1924 // Relocate a section during a relocatable link.
1926 template<int size
, bool big_endian
>
1928 Target_powerpc
<size
, big_endian
>::relocate_for_relocatable(
1929 const Relocate_info
<size
, big_endian
>* relinfo
,
1930 unsigned int sh_type
,
1931 const unsigned char* prelocs
,
1933 Output_section
* output_section
,
1934 off_t offset_in_output_section
,
1935 const Relocatable_relocs
* rr
,
1936 unsigned char* view
,
1937 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
1938 section_size_type view_size
,
1939 unsigned char* reloc_view
,
1940 section_size_type reloc_view_size
)
1942 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1944 gold::relocate_for_relocatable
<size
, big_endian
, elfcpp::SHT_RELA
>(
1949 offset_in_output_section
,
1958 // Return the value to use for a dynamic which requires special
1959 // treatment. This is how we support equality comparisons of function
1960 // pointers across shared library boundaries, as described in the
1961 // processor specific ABI supplement.
1963 template<int size
, bool big_endian
>
1965 Target_powerpc
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
1967 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
1968 return this->plt_section()->address() + gsym
->plt_offset();
1971 // The selector for powerpc object files.
1973 template<int size
, bool big_endian
>
1974 class Target_selector_powerpc
: public Target_selector
1977 Target_selector_powerpc()
1978 : Target_selector(elfcpp::EM_NONE
, size
, big_endian
,
1980 (big_endian
? "elf64-powerpc" : "elf64-powerpcle") :
1981 (big_endian
? "elf32-powerpc" : "elf32-powerpcle")))
1984 Target
* do_recognize(int machine
, int, int)
1989 if (machine
!= elfcpp::EM_PPC64
)
1994 if (machine
!= elfcpp::EM_PPC
)
2002 return this->instantiate_target();
2005 Target
* do_instantiate_target()
2006 { return new Target_powerpc
<size
, big_endian
>(); }
2009 Target_selector_powerpc
<32, true> target_selector_ppc32
;
2010 Target_selector_powerpc
<32, false> target_selector_ppc32le
;
2011 Target_selector_powerpc
<64, true> target_selector_ppc64
;
2012 Target_selector_powerpc
<64, false> target_selector_ppc64le
;
2014 } // End anonymous namespace.