1 // s390.cc -- s390 target support for gold.
3 // Copyright (C) 2015 Free Software Foundation, Inc.
4 // Written by Marcin KoĆcielnicki <koriakin@0x04.net>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
29 #include "parameters.h"
36 #include "copy-relocs.h"
38 #include "target-reloc.h"
39 #include "target-select.h"
49 // A class to handle the .got.plt section.
52 class Output_data_got_plt_s390
: public Output_section_data_build
55 Output_data_got_plt_s390(Layout
* layout
)
56 : Output_section_data_build(size
/8),
60 Output_data_got_plt_s390(Layout
* layout
, off_t data_size
)
61 : Output_section_data_build(data_size
, size
/8),
66 // Write out the PLT data.
68 do_write(Output_file
*);
70 // Write to a map file.
72 do_print_to_mapfile(Mapfile
* mapfile
) const
73 { mapfile
->print_output_data(this, "** GOT PLT"); }
76 // A pointer to the Layout class, so that we can find the .dynamic
77 // section when we write out the GOT PLT section.
81 // A class to handle the PLT data.
84 class Output_data_plt_s390
: public Output_section_data
87 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, true>
90 Output_data_plt_s390(Layout
* layout
,
91 Output_data_got
<size
, true>* got
,
92 Output_data_got_plt_s390
<size
>* got_plt
,
93 Output_data_space
* got_irelative
)
94 : Output_section_data(4), layout_(layout
),
95 irelative_rel_(NULL
), got_(got
), got_plt_(got_plt
),
96 got_irelative_(got_irelative
), count_(0),
97 irelative_count_(0), free_list_()
98 { this->init(layout
); }
100 Output_data_plt_s390(Layout
* layout
,
101 Output_data_got
<size
, true>* got
,
102 Output_data_got_plt_s390
<size
>* got_plt
,
103 Output_data_space
* got_irelative
,
104 unsigned int plt_count
)
105 : Output_section_data((plt_count
+ 1) * plt_entry_size
,
107 layout_(layout
), irelative_rel_(NULL
), got_(got
),
108 got_plt_(got_plt
), got_irelative_(got_irelative
), count_(plt_count
),
109 irelative_count_(0), free_list_()
113 // Initialize the free list and reserve the first entry.
114 this->free_list_
.init((plt_count
+ 1) * plt_entry_size
, false);
115 this->free_list_
.remove(0, plt_entry_size
);
118 // Initialize the PLT section.
120 init(Layout
* layout
);
122 // Add an entry to the PLT.
124 add_entry(Symbol_table
*, Layout
*, Symbol
* gsym
);
126 // Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
128 add_local_ifunc_entry(Symbol_table
*, Layout
*,
129 Sized_relobj_file
<size
, true>*, unsigned int);
131 // Add the relocation for a PLT entry.
133 add_relocation(Symbol_table
*, Layout
*, Symbol
*, unsigned int);
135 // Return the .rela.plt section data.
138 { return this->rel_
; }
140 // Return where the IRELATIVE relocations should go in the PLT
143 rela_irelative(Symbol_table
*, Layout
*);
145 // Return whether we created a section for IRELATIVE relocations.
147 has_irelative_section() const
148 { return this->irelative_rel_
!= NULL
; }
150 // Return the number of PLT entries.
153 { return this->count_
+ this->irelative_count_
; }
155 // Return the offset of the first non-reserved PLT entry.
157 first_plt_entry_offset()
158 { return plt_entry_size
; }
160 // Return the size of a PLT entry.
162 get_plt_entry_size() const
163 { return plt_entry_size
; }
165 // Reserve a slot in the PLT for an existing symbol in an incremental update.
167 reserve_slot(unsigned int plt_index
)
169 this->free_list_
.remove((plt_index
+ 1) * plt_entry_size
,
170 (plt_index
+ 2) * plt_entry_size
);
173 // Return the PLT address to use for a global symbol.
175 address_for_global(const Symbol
*);
177 // Return the PLT address to use for a local symbol.
179 address_for_local(const Relobj
*, unsigned int symndx
);
181 // Add .eh_frame information for the PLT.
183 add_eh_frame(Layout
* layout
)
186 layout
->add_eh_frame_for_plt(this,
188 plt_eh_frame_cie_size
,
190 plt_eh_frame_fde_size
);
194 // Fill in the first PLT entry.
196 fill_first_plt_entry(unsigned char* pov
,
197 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_address
,
198 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
);
200 // Fill in a normal PLT entry. Returns the offset into the entry that
201 // should be the initial GOT slot value.
203 fill_plt_entry(unsigned char* pov
,
204 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_address
,
205 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
,
206 unsigned int got_offset
,
207 unsigned int plt_offset
,
208 unsigned int plt_rel_offset
);
211 do_adjust_output_section(Output_section
* os
);
213 // Write to a map file.
215 do_print_to_mapfile(Mapfile
* mapfile
) const
216 { mapfile
->print_output_data(this, _("** PLT")); }
219 // Set the final size.
221 set_final_data_size();
223 // Write out the PLT data.
225 do_write(Output_file
*);
227 // A pointer to the Layout class, so that we can find the .dynamic
228 // section when we write out the GOT PLT section.
230 // The reloc section.
232 // The IRELATIVE relocs, if necessary. These must follow the
233 // regular PLT relocations.
234 Reloc_section
* irelative_rel_
;
236 Output_data_got
<size
, true>* got_
;
237 // The .got.plt section.
238 Output_data_got_plt_s390
<size
>* got_plt_
;
239 // The part of the .got.plt section used for IRELATIVE relocs.
240 Output_data_space
* got_irelative_
;
241 // The number of PLT entries.
243 // Number of PLT entries with R_TILEGX_IRELATIVE relocs. These
244 // follow the regular PLT entries.
245 unsigned int irelative_count_
;
246 // List of available regions within the section, for incremental
248 Free_list free_list_
;
250 // The size of an entry in the PLT.
251 static const int plt_entry_size
= 0x20;
252 // The first entry in the PLT.
253 static const unsigned char first_plt_entry_32_abs
[plt_entry_size
];
254 static const unsigned char first_plt_entry_32_pic
[plt_entry_size
];
255 static const unsigned char first_plt_entry_64
[plt_entry_size
];
256 // Other entries in the PLT for an executable.
257 static const unsigned char plt_entry_32_abs
[plt_entry_size
];
258 static const unsigned char plt_entry_32_pic12
[plt_entry_size
];
259 static const unsigned char plt_entry_32_pic16
[plt_entry_size
];
260 static const unsigned char plt_entry_32_pic
[plt_entry_size
];
261 static const unsigned char plt_entry_64
[plt_entry_size
];
263 // The .eh_frame unwind information for the PLT.
264 static const int plt_eh_frame_cie_size
= 12;
265 static const unsigned char plt_eh_frame_cie
[plt_eh_frame_cie_size
];
266 static const int plt_eh_frame_fde_size
= 12;
267 static const unsigned char plt_eh_frame_fde
[plt_eh_frame_fde_size
];
272 class Target_s390
: public Sized_target
<size
, true>
275 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, true> Reloc_section
;
278 : Sized_target
<size
, true>(&s390_info
),
279 got_(NULL
), plt_(NULL
), got_plt_(NULL
), got_irelative_(NULL
),
280 global_offset_table_(NULL
), rela_dyn_(NULL
),
281 rela_irelative_(NULL
), copy_relocs_(elfcpp::R_390_COPY
),
282 got_mod_index_offset_(-1U), tls_base_symbol_defined_(false),
286 // Scan the relocations to look for symbol adjustments.
288 gc_process_relocs(Symbol_table
* symtab
,
290 Sized_relobj_file
<size
, true>* object
,
291 unsigned int data_shndx
,
292 unsigned int sh_type
,
293 const unsigned char* prelocs
,
295 Output_section
* output_section
,
296 bool needs_special_offset_handling
,
297 size_t local_symbol_count
,
298 const unsigned char* plocal_symbols
);
300 // Scan the relocations to look for symbol adjustments.
302 scan_relocs(Symbol_table
* symtab
,
304 Sized_relobj_file
<size
, true>* object
,
305 unsigned int data_shndx
,
306 unsigned int sh_type
,
307 const unsigned char* prelocs
,
309 Output_section
* output_section
,
310 bool needs_special_offset_handling
,
311 size_t local_symbol_count
,
312 const unsigned char* plocal_symbols
);
314 // Finalize the sections.
316 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
318 // Return the value to use for a dynamic which requires special
321 do_dynsym_value(const Symbol
*) const;
323 // Relocate a section.
325 relocate_section(const Relocate_info
<size
, true>*,
326 unsigned int sh_type
,
327 const unsigned char* prelocs
,
329 Output_section
* output_section
,
330 bool needs_special_offset_handling
,
332 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
333 section_size_type view_size
,
334 const Reloc_symbol_changes
*);
336 // Scan the relocs during a relocatable link.
338 scan_relocatable_relocs(Symbol_table
* symtab
,
340 Sized_relobj_file
<size
, true>* object
,
341 unsigned int data_shndx
,
342 unsigned int sh_type
,
343 const unsigned char* prelocs
,
345 Output_section
* output_section
,
346 bool needs_special_offset_handling
,
347 size_t local_symbol_count
,
348 const unsigned char* plocal_symbols
,
349 Relocatable_relocs
*);
351 // Return a string used to fill a code section with nops.
353 do_code_fill(section_size_type length
) const;
355 // Emit relocations for a section.
358 const Relocate_info
<size
, true>*,
359 unsigned int sh_type
,
360 const unsigned char* prelocs
,
362 Output_section
* output_section
,
363 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
364 const Relocatable_relocs
*,
366 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
367 section_size_type view_size
,
368 unsigned char* reloc_view
,
369 section_size_type reloc_view_size
);
371 // Return whether SYM is defined by the ABI.
373 do_is_defined_by_abi(const Symbol
* sym
) const
374 { return strcmp(sym
->name(), "__tls_get_offset") == 0; }
376 // Return the PLT address to use for a global symbol.
378 do_plt_address_for_global(const Symbol
* gsym
) const
379 { return this->plt_section()->address_for_global(gsym
); }
382 do_plt_address_for_local(const Relobj
* relobj
, unsigned int symndx
) const
383 { return this->plt_section()->address_for_local(relobj
, symndx
); }
385 // Return the offset to use for the GOT_INDX'th got entry which is
386 // for a local tls symbol specified by OBJECT, SYMNDX.
388 do_tls_offset_for_local(const Relobj
* object
,
390 unsigned int got_indx
) const;
392 // Return the offset to use for the GOT_INDX'th got entry which is
393 // for global tls symbol GSYM.
395 do_tls_offset_for_global(Symbol
* gsym
, unsigned int got_indx
) const;
397 // This function should be defined in targets that can use relocation
398 // types to determine (implemented in local_reloc_may_be_function_pointer
399 // and global_reloc_may_be_function_pointer)
400 // if a function's pointer is taken. ICF uses this in safe mode to only
401 // fold those functions whose pointer is defintely not taken.
403 do_can_check_for_function_pointers() const
406 // Return the size of the GOT section.
410 gold_assert(this->got_
!= NULL
);
411 return this->got_
->data_size();
414 // Return the number of entries in the GOT.
416 got_entry_count() const
418 if (this->got_
== NULL
)
420 return this->got_size() / (size
/ 8);
423 // Return the number of entries in the PLT.
425 plt_entry_count() const;
427 // Return the offset of the first non-reserved PLT entry.
429 first_plt_entry_offset() const;
431 // Return the size of each PLT entry.
433 plt_entry_size() const;
435 // Create the GOT section for an incremental update.
436 Output_data_got_base
*
437 init_got_plt_for_update(Symbol_table
* symtab
,
439 unsigned int got_count
,
440 unsigned int plt_count
);
442 // Reserve a GOT entry for a local symbol, and regenerate any
443 // necessary dynamic relocations.
445 reserve_local_got_entry(unsigned int got_index
,
446 Sized_relobj
<size
, true>* obj
,
448 unsigned int got_type
);
450 // Reserve a GOT entry for a global symbol, and regenerate any
451 // necessary dynamic relocations.
453 reserve_global_got_entry(unsigned int got_index
, Symbol
* gsym
,
454 unsigned int got_type
);
456 // Register an existing PLT entry for a global symbol.
458 register_global_plt_entry(Symbol_table
*, Layout
*, unsigned int plt_index
,
461 // Force a COPY relocation for a given symbol.
463 emit_copy_reloc(Symbol_table
*, Symbol
*, Output_section
*, off_t
);
465 // Apply an incremental relocation.
467 apply_relocation(const Relocate_info
<size
, true>* relinfo
,
468 typename
elfcpp::Elf_types
<size
>::Elf_Addr r_offset
,
470 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
,
473 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
474 section_size_type view_size
);
478 // The class which scans relocations.
483 : issued_non_pic_error_(false)
487 get_reference_flags(unsigned int r_type
);
490 local(Symbol_table
* symtab
, Layout
* layout
, Target_s390
* target
,
491 Sized_relobj_file
<size
, true>* object
,
492 unsigned int data_shndx
,
493 Output_section
* output_section
,
494 const elfcpp::Rela
<size
, true>& reloc
, unsigned int r_type
,
495 const elfcpp::Sym
<size
, true>& lsym
,
499 global(Symbol_table
* symtab
, Layout
* layout
, Target_s390
* target
,
500 Sized_relobj_file
<size
, true>* object
,
501 unsigned int data_shndx
,
502 Output_section
* output_section
,
503 const elfcpp::Rela
<size
, true>& reloc
, unsigned int r_type
,
507 local_reloc_may_be_function_pointer(Symbol_table
* symtab
, Layout
* layout
,
509 Sized_relobj_file
<size
, true>* object
,
510 unsigned int data_shndx
,
511 Output_section
* output_section
,
512 const elfcpp::Rela
<size
, true>& reloc
,
514 const elfcpp::Sym
<size
, true>& lsym
);
517 global_reloc_may_be_function_pointer(Symbol_table
* symtab
, Layout
* layout
,
519 Sized_relobj_file
<size
, true>* object
,
520 unsigned int data_shndx
,
521 Output_section
* output_section
,
522 const elfcpp::Rela
<size
, true>& reloc
,
528 unsupported_reloc_local(Sized_relobj_file
<size
, true>*,
529 unsigned int r_type
);
532 unsupported_reloc_global(Sized_relobj_file
<size
, true>*,
533 unsigned int r_type
, Symbol
*);
536 check_non_pic(Relobj
*, unsigned int r_type
);
539 possible_function_pointer_reloc(unsigned int r_type
);
542 reloc_needs_plt_for_ifunc(Sized_relobj_file
<size
, true>*,
543 unsigned int r_type
);
545 // Whether we have issued an error about a non-PIC compilation.
546 bool issued_non_pic_error_
;
549 // The class which implements relocation.
553 // Do a relocation. Return false if the caller should not issue
554 // any warnings about this relocation.
556 relocate(const Relocate_info
<size
, true>*, Target_s390
*,
558 size_t relnum
, const elfcpp::Rela
<size
, true>&,
559 unsigned int r_type
, const Sized_symbol
<size
>*,
560 const Symbol_value
<size
>*,
561 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
565 // Do a TLS relocation.
566 inline typename
elfcpp::Elf_types
<size
>::Elf_Addr
567 relocate_tls(const Relocate_info
<size
, true>*, Target_s390
*,
568 size_t relnum
, const elfcpp::Rela
<size
, true>&,
569 unsigned int r_type
, const Sized_symbol
<size
>*,
570 const Symbol_value
<size
>*,
571 unsigned char*, section_size_type
);
573 // Do a TLS General-Dynamic to Initial-Exec transition.
575 tls_gd_to_ie(const Relocate_info
<size
, true>*, size_t relnum
,
576 const elfcpp::Rela
<size
, true>&,
578 section_size_type view_size
);
580 // Do a TLS General-Dynamic to Local-Exec transition.
582 tls_gd_to_le(const Relocate_info
<size
, true>*, size_t relnum
,
583 const elfcpp::Rela
<size
, true>&,
585 section_size_type view_size
);
587 // Do a TLS Local-Dynamic to Local-Exec transition.
589 tls_ld_to_le(const Relocate_info
<size
, true>*, size_t relnum
,
590 const elfcpp::Rela
<size
, true>&,
592 section_size_type view_size
);
594 // Do a TLS Initial-Exec to Local-Exec transition.
596 tls_ie_to_le(const Relocate_info
<size
, true>*, size_t relnum
,
597 const elfcpp::Rela
<size
, true>&,
599 section_size_type view_size
);
602 // A class which returns the size required for a relocation type,
603 // used while scanning relocs during a relocatable link.
604 class Relocatable_size_for_reloc
608 get_size_for_reloc(unsigned int, Relobj
*);
611 // Adjust TLS relocation type based on the options and whether this
612 // is a local symbol.
613 static tls::Tls_optimization
614 optimize_tls_reloc(bool is_final
, int r_type
);
616 // Get the GOT section.
617 const Output_data_got
<size
, true>*
620 gold_assert(this->got_
!= NULL
);
624 // Get the GOT section, creating it if necessary.
625 Output_data_got
<size
, true>*
626 got_section(Symbol_table
*, Layout
*);
628 typename
elfcpp::Elf_types
<size
>::Elf_Addr
631 gold_assert(this->got_
!= NULL
);
632 return this->got_plt_
->address();
635 typename
elfcpp::Elf_types
<size
>::Elf_Addr
636 got_main_offset() const
638 gold_assert(this->got_
!= NULL
);
639 return this->got_
->address() - this->got_address();
642 // Create the PLT section.
644 make_plt_section(Symbol_table
* symtab
, Layout
* layout
);
646 // Create a PLT entry for a global symbol.
648 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
650 // Create a PLT entry for a local STT_GNU_IFUNC symbol.
652 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
653 Sized_relobj_file
<size
, true>* relobj
,
654 unsigned int local_sym_index
);
656 // Create a GOT entry for the TLS module index.
658 got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
659 Sized_relobj_file
<size
, true>* object
);
661 // Get the PLT section.
662 Output_data_plt_s390
<size
>*
665 gold_assert(this->plt_
!= NULL
);
669 // Get the dynamic reloc section, creating it if necessary.
671 rela_dyn_section(Layout
*);
673 // Get the section to use for IRELATIVE relocations.
675 rela_irelative_section(Layout
*);
677 // Add a potential copy relocation.
679 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
680 Sized_relobj_file
<size
, true>* object
,
681 unsigned int shndx
, Output_section
* output_section
,
682 Symbol
* sym
, const elfcpp::Rela
<size
, true>& reloc
)
684 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
685 this->copy_relocs_
.copy_reloc(symtab
, layout
,
686 symtab
->get_sized_symbol
<size
>(sym
),
687 object
, shndx
, output_section
,
688 r_type
, reloc
.get_r_offset(),
689 reloc
.get_r_addend(),
690 this->rela_dyn_section(layout
));
693 // Information about this specific target which we pass to the
694 // general Target structure.
695 static Target::Target_info s390_info
;
697 // The types of GOT entries needed for this platform.
698 // These values are exposed to the ABI in an incremental link.
699 // Do not renumber existing values without changing the version
700 // number of the .gnu_incremental_inputs section.
703 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
704 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
705 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
709 Output_data_got
<size
, true>* got_
;
711 Output_data_plt_s390
<size
>* plt_
;
712 // The GOT PLT section.
713 Output_data_got_plt_s390
<size
>* got_plt_
;
714 // The GOT section for IRELATIVE relocations.
715 Output_data_space
* got_irelative_
;
716 // The _GLOBAL_OFFSET_TABLE_ symbol.
717 Symbol
* global_offset_table_
;
718 // The dynamic reloc section.
719 Reloc_section
* rela_dyn_
;
720 // The section to use for IRELATIVE relocs.
721 Reloc_section
* rela_irelative_
;
722 // Relocs saved to avoid a COPY reloc.
723 Copy_relocs
<elfcpp::SHT_RELA
, size
, true> copy_relocs_
;
724 // Offset of the GOT entry for the TLS module index.
725 unsigned int got_mod_index_offset_
;
726 // True if the _TLS_MODULE_BASE_ symbol has been defined.
727 bool tls_base_symbol_defined_
;
728 // For use in do_tls_offset_for_*
733 Target::Target_info Target_s390
<32>::s390_info
=
736 true, // is_big_endian
737 elfcpp::EM_S390
, // machine_code
738 false, // has_make_symbol
739 false, // has_resolve
740 true, // has_code_fill
741 true, // is_default_stack_executable
742 true, // can_icf_inline_merge_sections
744 "/lib/ld.so.1", // dynamic_linker
745 0x00400000, // default_text_segment_address
746 4 * 1024, // abi_pagesize (overridable by -z max-page-size)
747 4 * 1024, // common_pagesize (overridable by -z common-page-size)
748 false, // isolate_execinstr
750 elfcpp::SHN_UNDEF
, // small_common_shndx
751 elfcpp::SHN_UNDEF
, // large_common_shndx
752 0, // small_common_section_flags
753 0, // large_common_section_flags
754 NULL
, // attributes_section
755 NULL
, // attributes_vendor
756 "_start", // entry_symbol_name
757 32, // hash_entry_size
761 Target::Target_info Target_s390
<64>::s390_info
=
764 true, // is_big_endian
765 elfcpp::EM_S390
, // machine_code
766 false, // has_make_symbol
767 false, // has_resolve
768 true, // has_code_fill
769 true, // is_default_stack_executable
770 true, // can_icf_inline_merge_sections
772 "/lib/ld64.so.1", // dynamic_linker
773 0x80000000ll
, // default_text_segment_address
774 4 * 1024, // abi_pagesize (overridable by -z max-page-size)
775 4 * 1024, // common_pagesize (overridable by -z common-page-size)
776 false, // isolate_execinstr
778 elfcpp::SHN_UNDEF
, // small_common_shndx
779 elfcpp::SHN_UNDEF
, // large_common_shndx
780 0, // small_common_section_flags
781 0, // large_common_section_flags
782 NULL
, // attributes_section
783 NULL
, // attributes_vendor
784 "_start", // entry_symbol_name
785 64, // hash_entry_size
789 class S390_relocate_functions
809 typedef S390_relocate_functions
<size
> This
;
810 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
812 template<int valsize
>
814 has_overflow_signed(Address value
)
816 // limit = 1 << (valsize - 1) without shift count exceeding size of type
817 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
818 limit
<<= ((valsize
- 1) >> 1);
819 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
820 return value
+ limit
> (limit
<< 1) - 1;
823 template<int valsize
>
825 has_overflow_unsigned(Address value
)
827 Address limit
= static_cast<Address
>(1) << ((valsize
- 1) >> 1);
828 limit
<<= ((valsize
- 1) >> 1);
829 limit
<<= ((valsize
- 1) - 2 * ((valsize
- 1) >> 1));
830 return value
> (limit
<< 1) - 1;
833 template<int fieldsize
>
835 rela(unsigned char* view
, Address mask
, Address value
)
837 typedef typename
elfcpp::Swap
<fieldsize
, true>::Valtype Valtype
;
838 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
839 Valtype val
= elfcpp::Swap
<fieldsize
, true>::readval(view
);
842 elfcpp::Swap
<fieldsize
, true>::writeval(wv
, val
| value
);
846 // R_390_12, R_390_GOT12, R_390_GOTPLT12, R_390_GOTIE12
848 rela12(unsigned char* view
, Address value
)
850 if (This::template has_overflow_unsigned
<12>(value
))
851 return STATUS_OVERFLOW
;
852 This::template rela
<16>(view
, 0x0fff, value
);
856 // R_390_16, R_390_GOT16, R_390_GOTPLT16, R_390_GOTOFF16, R_390_PLTOFF16
858 rela16(unsigned char* view
, Address value
)
860 if (This::template has_overflow_signed
<16>(value
))
861 return STATUS_OVERFLOW
;
862 This::template rela
<16>(view
, 0xffff, value
);
866 // R_390_20, R_390_GOT20, R_390_GOTPLT20, R_390_GOTIE20
868 rela20(unsigned char* view
, Address value
)
870 if (This::template has_overflow_signed
<20>(value
))
871 return STATUS_OVERFLOW
;
872 This::template rela
<16>(view
, 0x0fff, value
);
873 This::template rela
<16>(view
+ 2, 0xff00, value
>> (12 - 8));
877 // R_390_PC12DBL, R_390_PLT12DBL
879 pcrela12dbl(unsigned char* view
, Address value
, Address address
)
882 if ((value
& 1) != 0)
883 return STATUS_OVERFLOW
;
884 if (This::template has_overflow_signed
<13>(value
))
885 return STATUS_OVERFLOW
;
887 This::template rela
<16>(view
, 0x0fff, value
);
891 // R_390_PC16DBL, R_390_PLT16DBL
893 pcrela16dbl(unsigned char* view
, Address value
, Address address
)
896 if ((value
& 1) != 0)
897 return STATUS_OVERFLOW
;
898 if (This::template has_overflow_signed
<17>(value
))
899 return STATUS_OVERFLOW
;
901 This::template rela
<16>(view
, 0xffff, value
);
905 // R_390_PC24DBL, R_390_PLT24DBL
907 pcrela24dbl(unsigned char* view
, Address value
, Address address
)
910 if ((value
& 1) != 0)
911 return STATUS_OVERFLOW
;
912 if (This::template has_overflow_signed
<25>(value
))
913 return STATUS_OVERFLOW
;
915 // Swap doesn't take 24-bit fields well...
916 This::template rela
<8>(view
, 0xff, value
>> 16);
917 This::template rela
<16>(view
+ 1, 0xffff, value
);
921 // R_390_PC32DBL, R_390_PLT32DBL, R_390_GOTPCDBL, R_390_GOTENT, R_390_GOTPLTENT
923 pcrela32dbl(unsigned char* view
, Address value
, Address address
)
925 Address reloc
= value
- address
;
926 if ((reloc
& 1) != 0)
928 gold_warning(_("R_390_PC32DBL target misaligned at %llx"), (long long)address
);
929 // Wait for a fix for https://sourceware.org/bugzilla/show_bug.cgi?id=18960
930 // return STATUS_OVERFLOW;
932 if (This::template has_overflow_signed
<33>(reloc
))
933 return STATUS_OVERFLOW
;
935 if (value
< address
&& size
== 32)
937 This::template rela
<32>(view
, 0xffffffff, reloc
);
943 // Initialize the PLT section.
947 Output_data_plt_s390
<size
>::init(Layout
* layout
)
949 this->rel_
= new Reloc_section(false);
950 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
951 elfcpp::SHF_ALLOC
, this->rel_
,
952 ORDER_DYNAMIC_PLT_RELOCS
, false);
957 Output_data_plt_s390
<size
>::do_adjust_output_section(Output_section
* os
)
959 os
->set_entsize(plt_entry_size
);
962 // Add an entry to the PLT.
966 Output_data_plt_s390
<size
>::add_entry(Symbol_table
* symtab
, Layout
* layout
,
969 gold_assert(!gsym
->has_plt_offset());
971 unsigned int plt_index
;
973 section_offset_type got_offset
;
975 unsigned int* pcount
;
977 unsigned int reserved
;
978 Output_section_data_build
* got
;
979 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
980 && gsym
->can_use_relative_reloc(false))
982 pcount
= &this->irelative_count_
;
985 got
= this->got_irelative_
;
989 pcount
= &this->count_
;
992 got
= this->got_plt_
;
995 if (!this->is_data_size_valid())
997 // Note that when setting the PLT offset for a non-IRELATIVE
998 // entry we skip the initial reserved PLT entry.
999 plt_index
= *pcount
+ offset
;
1000 plt_offset
= plt_index
* plt_entry_size
;
1004 got_offset
= (plt_index
- offset
+ reserved
) * size
/ 8;
1005 gold_assert(got_offset
== got
->current_data_size());
1007 // Every PLT entry needs a GOT entry which points back to the PLT
1008 // entry (this will be changed by the dynamic linker, normally
1009 // lazily when the function is called).
1010 got
->set_current_data_size(got_offset
+ size
/ 8);
1014 // FIXME: This is probably not correct for IRELATIVE relocs.
1016 // For incremental updates, find an available slot.
1017 plt_offset
= this->free_list_
.allocate(plt_entry_size
,
1019 if (plt_offset
== -1)
1020 gold_fallback(_("out of patch space (PLT);"
1021 " relink with --incremental-full"));
1023 // The GOT and PLT entries have a 1-1 correspondance, so the GOT offset
1024 // can be calculated from the PLT index, adjusting for the three
1025 // reserved entries at the beginning of the GOT.
1026 plt_index
= plt_offset
/ plt_entry_size
- 1;
1027 got_offset
= (plt_index
- offset
+ reserved
) * size
/ 8;
1030 gsym
->set_plt_offset(plt_offset
);
1032 // Every PLT entry needs a reloc.
1033 this->add_relocation(symtab
, layout
, gsym
, got_offset
);
1035 // Note that we don't need to save the symbol. The contents of the
1036 // PLT are independent of which symbols are used. The symbols only
1037 // appear in the relocations.
1040 // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. Return
1045 Output_data_plt_s390
<size
>::add_local_ifunc_entry(
1046 Symbol_table
* symtab
,
1048 Sized_relobj_file
<size
, true>* relobj
,
1049 unsigned int local_sym_index
)
1051 unsigned int plt_offset
= this->irelative_count_
* plt_entry_size
;
1052 ++this->irelative_count_
;
1054 section_offset_type got_offset
= this->got_irelative_
->current_data_size();
1056 // Every PLT entry needs a GOT entry which points back to the PLT
1058 this->got_irelative_
->set_current_data_size(got_offset
+ size
/ 8);
1060 // Every PLT entry needs a reloc.
1061 Reloc_section
* rela
= this->rela_irelative(symtab
, layout
);
1062 rela
->add_symbolless_local_addend(relobj
, local_sym_index
,
1063 elfcpp::R_390_IRELATIVE
,
1064 this->got_irelative_
, got_offset
, 0);
1069 // Add the relocation for a PLT entry.
1073 Output_data_plt_s390
<size
>::add_relocation(Symbol_table
* symtab
,
1076 unsigned int got_offset
)
1078 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
1079 && gsym
->can_use_relative_reloc(false))
1081 Reloc_section
* rela
= this->rela_irelative(symtab
, layout
);
1082 rela
->add_symbolless_global_addend(gsym
, elfcpp::R_390_IRELATIVE
,
1083 this->got_irelative_
, got_offset
, 0);
1087 gsym
->set_needs_dynsym_entry();
1088 this->rel_
->add_global(gsym
, elfcpp::R_390_JMP_SLOT
, this->got_plt_
,
1093 // Return where the IRELATIVE relocations should go in the PLT. These
1094 // follow the JUMP_SLOT and the TLSDESC relocations.
1097 typename Output_data_plt_s390
<size
>::Reloc_section
*
1098 Output_data_plt_s390
<size
>::rela_irelative(Symbol_table
* symtab
,
1101 if (this->irelative_rel_
== NULL
)
1103 this->irelative_rel_
= new Reloc_section(false);
1104 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
1105 elfcpp::SHF_ALLOC
, this->irelative_rel_
,
1106 ORDER_DYNAMIC_PLT_RELOCS
, false);
1107 gold_assert(this->irelative_rel_
->output_section()
1108 == this->rel_
->output_section());
1110 if (parameters
->doing_static_link())
1112 // A statically linked executable will only have a .rela.plt
1113 // section to hold R_390_IRELATIVE relocs for
1114 // STT_GNU_IFUNC symbols. The library will use these
1115 // symbols to locate the IRELATIVE relocs at program startup
1117 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
1118 Symbol_table::PREDEFINED
,
1119 this->irelative_rel_
, 0, 0,
1120 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
1121 elfcpp::STV_HIDDEN
, 0, false, true);
1122 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
1123 Symbol_table::PREDEFINED
,
1124 this->irelative_rel_
, 0, 0,
1125 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
1126 elfcpp::STV_HIDDEN
, 0, true, true);
1129 return this->irelative_rel_
;
1132 // Return the PLT address to use for a global symbol.
1136 Output_data_plt_s390
<size
>::address_for_global(const Symbol
* gsym
)
1138 uint64_t offset
= 0;
1139 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
1140 && gsym
->can_use_relative_reloc(false))
1141 offset
= (this->count_
+ 1) * plt_entry_size
;
1142 return this->address() + offset
+ gsym
->plt_offset();
1145 // Return the PLT address to use for a local symbol. These are always
1146 // IRELATIVE relocs.
1150 Output_data_plt_s390
<size
>::address_for_local(const Relobj
* object
,
1153 return (this->address()
1154 + (this->count_
+ 1) * plt_entry_size
1155 + object
->local_plt_offset(r_sym
));
1158 // Set the final size.
1161 Output_data_plt_s390
<size
>::set_final_data_size()
1163 unsigned int count
= this->count_
+ this->irelative_count_
;
1164 this->set_data_size((count
+ 1) * plt_entry_size
);
1169 Output_data_plt_s390
<size
>::first_plt_entry_32_abs
[plt_entry_size
] =
1171 0x50, 0x10, 0xf0, 0x1c, // st %r1, 28(%r15)
1172 0x0d, 0x10, // basr %r1, %r0
1173 0x58, 0x10, 0x10, 0x12, // l %r1, 18(%r1)
1174 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, // mvc 24(4,%r15), 4(%r1)
1175 0x58, 0x10, 0x10, 0x08, // l %r1, 8(%r1)
1176 0x07, 0xf1, // br %r1
1177 0x00, 0x00, // padding
1178 0x00, 0x00, 0x00, 0x00, // _GLOBAL_OFFSET_TABLE_ (to fill)
1179 0x00, 0x00, 0x00, 0x00, // padding
1184 Output_data_plt_s390
<size
>::first_plt_entry_32_pic
[plt_entry_size
] =
1186 0x50, 0x10, 0xf0, 0x1c, // st %r1, 28(%r15)
1187 0x58, 0x10, 0xc0, 0x04, // l %r1, 4(%r12)
1188 0x50, 0x10, 0xf0, 0x18, // st %r1, 24(%r15)
1189 0x58, 0x10, 0xc0, 0x08, // l %r1, 8(%r12)
1190 0x07, 0xf1, // br %r1
1191 0x00, 0x00, // padding
1192 0x00, 0x00, 0x00, 0x00, // padding
1193 0x00, 0x00, 0x00, 0x00, // padding
1194 0x00, 0x00, 0x00, 0x00, // padding
1199 Output_data_plt_s390
<size
>::first_plt_entry_64
[plt_entry_size
] =
1201 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, // stg %r1, 56(%r15)
1202 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, // larl %r1, _GLOBAL_OFFSET_TABLE_ (to fill)
1203 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, // mvc 48(8,%r15), 8(%r1)
1204 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, // lg %r1, 16(%r1)
1205 0x07, 0xf1, // br %r1
1213 Output_data_plt_s390
<size
>::fill_first_plt_entry(
1215 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_address
,
1216 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
)
1220 memcpy(pov
, first_plt_entry_64
, plt_entry_size
);
1221 S390_relocate_functions
<size
>::pcrela32dbl(pov
+ 8, got_address
, (plt_address
+ 6));
1223 else if (!parameters
->options().output_is_position_independent())
1225 memcpy(pov
, first_plt_entry_32_abs
, plt_entry_size
);
1226 elfcpp::Swap
<32, true>::writeval(pov
+ 24, got_address
);
1230 memcpy(pov
, first_plt_entry_32_pic
, plt_entry_size
);
1236 Output_data_plt_s390
<size
>::plt_entry_32_abs
[plt_entry_size
] =
1239 0x0d, 0x10, // basr %r1, %r0
1240 0x58, 0x10, 0x10, 0x16, // l %r1, 22(%r1)
1241 0x58, 0x10, 0x10, 0x00, // l %r1, 0(%r1)
1242 0x07, 0xf1, // br %r1
1244 0x0d, 0x10, // basr %r1, %r0
1245 0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
1246 0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
1247 0x00, 0x00, // padding
1248 0x00, 0x00, 0x00, 0x00, // _GLOBAL_OFFSET_TABLE_+sym@gotplt (to fill)
1249 0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
1254 Output_data_plt_s390
<size
>::plt_entry_32_pic12
[plt_entry_size
] =
1257 0x58, 0x10, 0xc0, 0x00, // l %r1, sym@gotplt(%r12) (to fill)
1258 0x07, 0xf1, // br %r1
1259 0x00, 0x00, // padding
1260 0x00, 0x00, 0x00, 0x00, // padding
1262 0x0d, 0x10, // basr %r1, %r0
1263 0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
1264 0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
1265 0x00, 0x00, // padding
1266 0x00, 0x00, 0x00, 0x00, // padding
1267 0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
1272 Output_data_plt_s390
<size
>::plt_entry_32_pic16
[plt_entry_size
] =
1275 0xa7, 0x18, 0x00, 0x00, // lhi %r1, sym@gotplt (to fill)
1276 0x58, 0x11, 0xc0, 0x00, // l %r1, 0(%r1, %r12)
1277 0x07, 0xf1, // br %r1
1278 0x00, 0x00, // padding
1280 0x0d, 0x10, // basr %r1, %r0
1281 0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
1282 0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
1283 0x00, 0x00, // padding
1284 0x00, 0x00, 0x00, 0x00, // padding
1285 0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
1290 Output_data_plt_s390
<size
>::plt_entry_32_pic
[plt_entry_size
] =
1293 0x0d, 0x10, // basr %r1, %r0
1294 0x58, 0x10, 0x10, 0x16, // l %r1, 22(%r1)
1295 0x58, 0x11, 0xc0, 0x00, // l %r1, 0(%r1, %r12)
1296 0x07, 0xf1, // br %r1
1298 0x0d, 0x10, // basr %r1, %r0
1299 0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
1300 0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
1301 0x00, 0x00, // padding
1302 0x00, 0x00, 0x00, 0x00, // sym@gotplt (to fill)
1303 0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
1308 Output_data_plt_s390
<size
>::plt_entry_64
[plt_entry_size
] =
1311 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, // larl %r1, _GLOBAL_OFFSET_TABLE_+off (to fill)
1312 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, // lg %r1, 0(%r1)
1313 0x07, 0xf1, // br %r1
1315 0x0d, 0x10, // basr %r1, %r0
1316 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, // lgf %r1, 12(%r1)
1317 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, // jg first_plt_entry (to fill)
1318 0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
1323 Output_data_plt_s390
<size
>::fill_plt_entry(
1325 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_address
,
1326 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
,
1327 unsigned int got_offset
,
1328 unsigned int plt_offset
,
1329 unsigned int plt_rel_offset
)
1333 memcpy(pov
, plt_entry_64
, plt_entry_size
);
1334 S390_relocate_functions
<size
>::pcrela32dbl(pov
+ 2, got_address
+ got_offset
, plt_address
+ plt_offset
);
1335 S390_relocate_functions
<size
>::pcrela32dbl(pov
+ 24, plt_address
, plt_address
+ plt_offset
+ 22);
1339 if (!parameters
->options().output_is_position_independent())
1341 memcpy(pov
, plt_entry_32_abs
, plt_entry_size
);
1342 elfcpp::Swap
<32, true>::writeval(pov
+ 24, got_address
+ got_offset
);
1346 if (got_offset
< 0x1000)
1348 memcpy(pov
, plt_entry_32_pic12
, plt_entry_size
);
1349 S390_relocate_functions
<size
>::rela12(pov
+ 2, got_offset
);
1351 else if (got_offset
< 0x8000)
1353 memcpy(pov
, plt_entry_32_pic16
, plt_entry_size
);
1354 S390_relocate_functions
<size
>::rela16(pov
+ 2, got_offset
);
1358 memcpy(pov
, plt_entry_32_pic
, plt_entry_size
);
1359 elfcpp::Swap
<32, true>::writeval(pov
+ 24, got_offset
);
1362 typename
elfcpp::Elf_types
<size
>::Elf_Addr target
= plt_address
;
1363 if (plt_offset
>= 0x10000)
1365 // Would overflow pcrela16dbl - aim at the farthest previous jump
1367 if (plt_offset
> 0x10000)
1369 // Use the full range of pcrel16dbl.
1370 target
= plt_address
+ plt_offset
- 0x10000 + 18;
1374 // if plt_offset is exactly 0x10000, the above would aim at 18th byte
1375 // of first_plt_entry, which doesn't have the jump back like the others.
1376 // Aim at the next entry instead.
1377 target
= plt_address
+ plt_offset
- 0xffe0 + 18;
1380 S390_relocate_functions
<size
>::pcrela16dbl(pov
+ 20, target
, plt_address
+ plt_offset
+ 18);
1382 elfcpp::Swap
<32, true>::writeval(pov
+ 28, plt_rel_offset
);
1389 // The .eh_frame unwind information for the PLT.
1393 Output_data_plt_s390
<32>::plt_eh_frame_cie
[plt_eh_frame_cie_size
] =
1396 'z', // Augmentation: augmentation size included.
1397 'R', // Augmentation: FDE encoding included.
1398 '\0', // End of augmentation string.
1399 1, // Code alignment factor.
1400 0x7c, // Data alignment factor.
1401 14, // Return address column.
1402 1, // Augmentation size.
1403 (elfcpp::DW_EH_PE_pcrel
// FDE encoding.
1404 | elfcpp::DW_EH_PE_sdata4
),
1405 elfcpp::DW_CFA_def_cfa
, 15, 0x60, // DW_CFA_def_cfa: r15 ofs 0x60.
1410 Output_data_plt_s390
<64>::plt_eh_frame_cie
[plt_eh_frame_cie_size
] =
1413 'z', // Augmentation: augmentation size included.
1414 'R', // Augmentation: FDE encoding included.
1415 '\0', // End of augmentation string.
1416 1, // Code alignment factor.
1417 0x78, // Data alignment factor.
1418 14, // Return address column.
1419 1, // Augmentation size.
1420 (elfcpp::DW_EH_PE_pcrel
// FDE encoding.
1421 | elfcpp::DW_EH_PE_sdata4
),
1422 elfcpp::DW_CFA_def_cfa
, 15, 0xa0, // DW_CFA_def_cfa: r15 ofs 0xa0.
1427 Output_data_plt_s390
<size
>::plt_eh_frame_fde
[plt_eh_frame_fde_size
] =
1429 0, 0, 0, 0, // Replaced with offset to .plt.
1430 0, 0, 0, 0, // Replaced with size of .plt.
1431 0, // Augmentation size.
1437 // Write out the PLT. This uses the hand-coded instructions above,
1438 // and adjusts them as needed.
1442 Output_data_plt_s390
<size
>::do_write(Output_file
* of
)
1444 const off_t offset
= this->offset();
1445 const section_size_type oview_size
=
1446 convert_to_section_size_type(this->data_size());
1447 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1449 const off_t got_file_offset
= this->got_plt_
->offset();
1450 gold_assert(parameters
->incremental_update()
1451 || (got_file_offset
+ this->got_plt_
->data_size()
1452 == this->got_irelative_
->offset()));
1453 const section_size_type got_size
=
1454 convert_to_section_size_type(this->got_plt_
->data_size()
1455 + this->got_irelative_
->data_size());
1456 unsigned char* const got_view
= of
->get_output_view(got_file_offset
,
1459 unsigned char* pov
= oview
;
1461 // The base address of the .plt section.
1462 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
= this->address();
1463 // The base address of the PLT portion of the .got section,
1464 // which is where the GOT pointer will point, and where the
1465 // three reserved GOT entries are located.
1466 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_address
1467 = this->got_plt_
->address();
1469 this->fill_first_plt_entry(pov
, got_address
, plt_address
);
1470 pov
+= this->get_plt_entry_size();
1472 unsigned char* got_pov
= got_view
;
1474 const int rel_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
1476 unsigned int plt_offset
= this->get_plt_entry_size();
1477 unsigned int plt_rel_offset
= 0;
1478 unsigned int got_offset
= 3 * size
/ 8;
1479 const unsigned int count
= this->count_
+ this->irelative_count_
;
1480 // The first three entries in the GOT are reserved, and are written
1481 // by Output_data_got_plt_s390::do_write.
1482 got_pov
+= 3 * size
/ 8;
1484 for (unsigned int plt_index
= 0;
1487 pov
+= plt_entry_size
,
1488 got_pov
+= size
/ 8,
1489 plt_offset
+= plt_entry_size
,
1490 plt_rel_offset
+= rel_size
,
1491 got_offset
+= size
/ 8)
1493 // Set and adjust the PLT entry itself.
1494 unsigned int lazy_offset
= this->fill_plt_entry(pov
,
1495 got_address
, plt_address
,
1496 got_offset
, plt_offset
,
1499 // Set the entry in the GOT.
1500 elfcpp::Swap
<size
, true>::writeval(got_pov
,
1501 plt_address
+ plt_offset
+ lazy_offset
);
1504 gold_assert(static_cast<section_size_type
>(pov
- oview
) == oview_size
);
1505 gold_assert(static_cast<section_size_type
>(got_pov
- got_view
) == got_size
);
1507 of
->write_output_view(offset
, oview_size
, oview
);
1508 of
->write_output_view(got_file_offset
, got_size
, got_view
);
1511 // Get the GOT section, creating it if necessary.
1514 Output_data_got
<size
, true>*
1515 Target_s390
<size
>::got_section(Symbol_table
* symtab
, Layout
* layout
)
1517 if (this->got_
== NULL
)
1519 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
1521 // When using -z now, we can treat .got as a relro section.
1522 // Without -z now, it is modified after program startup by lazy
1524 bool is_got_relro
= parameters
->options().now();
1525 Output_section_order got_order
= (is_got_relro
1529 // The old GNU linker creates a .got.plt section. We just
1530 // create another set of data in the .got section. Note that we
1531 // always create a PLT if we create a GOT, although the PLT
1533 this->got_plt_
= new Output_data_got_plt_s390
<size
>(layout
);
1534 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1535 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
1536 this->got_plt_
, got_order
, is_got_relro
);
1538 // The first three entries are reserved.
1539 this->got_plt_
->set_current_data_size(3 * size
/ 8);
1541 // If there are any IRELATIVE relocations, they get GOT entries
1542 // in .got.plt after the jump slot entries.
1543 this->got_irelative_
= new Output_data_space(size
/ 8, "** GOT IRELATIVE PLT");
1544 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1545 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
1546 this->got_irelative_
,
1547 got_order
, is_got_relro
);
1549 // Unlike some targets (.e.g x86), S/390 does not use separate .got and
1550 // .got.plt sections in output. The output .got section contains both
1551 // PLT and non-PLT GOT entries.
1552 this->got_
= new Output_data_got
<size
, true>();
1554 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1555 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
1556 this->got_
, got_order
, is_got_relro
);
1558 // Define _GLOBAL_OFFSET_TABLE_ at the start of the GOT.
1559 this->global_offset_table_
=
1560 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1561 Symbol_table::PREDEFINED
,
1563 0, 0, elfcpp::STT_OBJECT
,
1565 elfcpp::STV_HIDDEN
, 0,
1572 // Get the dynamic reloc section, creating it if necessary.
1575 typename Target_s390
<size
>::Reloc_section
*
1576 Target_s390
<size
>::rela_dyn_section(Layout
* layout
)
1578 if (this->rela_dyn_
== NULL
)
1580 gold_assert(layout
!= NULL
);
1581 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
1582 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1583 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
1584 ORDER_DYNAMIC_RELOCS
, false);
1586 return this->rela_dyn_
;
1589 // Get the section to use for IRELATIVE relocs, creating it if
1590 // necessary. These go in .rela.dyn, but only after all other dynamic
1591 // relocations. They need to follow the other dynamic relocations so
1592 // that they can refer to global variables initialized by those
1596 typename Target_s390
<size
>::Reloc_section
*
1597 Target_s390
<size
>::rela_irelative_section(Layout
* layout
)
1599 if (this->rela_irelative_
== NULL
)
1601 // Make sure we have already created the dynamic reloc section.
1602 this->rela_dyn_section(layout
);
1603 this->rela_irelative_
= new Reloc_section(false);
1604 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
1605 elfcpp::SHF_ALLOC
, this->rela_irelative_
,
1606 ORDER_DYNAMIC_RELOCS
, false);
1607 gold_assert(this->rela_dyn_
->output_section()
1608 == this->rela_irelative_
->output_section());
1610 return this->rela_irelative_
;
1613 // Write the first three reserved words of the .got.plt section.
1614 // The remainder of the section is written while writing the PLT
1615 // in Output_data_plt_s390::do_write.
1619 Output_data_got_plt_s390
<size
>::do_write(Output_file
* of
)
1621 // The first entry in the GOT is the address of the .dynamic section
1622 // aka the PT_DYNAMIC segment. The next two entries are reserved.
1623 // We saved space for them when we created the section in
1624 // Target_x86_64::got_section.
1625 const off_t got_file_offset
= this->offset();
1626 gold_assert(this->data_size() >= 3 * size
/ 8);
1627 unsigned char* const got_view
=
1628 of
->get_output_view(got_file_offset
, 3 * size
/ 8);
1629 Output_section
* dynamic
= this->layout_
->dynamic_section();
1630 uint64_t dynamic_addr
= dynamic
== NULL
? 0 : dynamic
->address();
1631 elfcpp::Swap
<size
, true>::writeval(got_view
, dynamic_addr
);
1632 memset(got_view
+ size
/ 8, 0, 2 * size
/ 8);
1633 of
->write_output_view(got_file_offset
, 3 * size
/ 8, got_view
);
1636 // Create the PLT section.
1640 Target_s390
<size
>::make_plt_section(Symbol_table
* symtab
, Layout
* layout
)
1642 if (this->plt_
== NULL
)
1644 // Create the GOT sections first.
1645 this->got_section(symtab
, layout
);
1647 // Ensure that .rela.dyn always appears before .rela.plt This is
1648 // necessary due to how, on 32-bit S/390 and some other targets,
1649 // .rela.dyn needs to include .rela.plt in it's range.
1650 this->rela_dyn_section(layout
);
1652 this->plt_
= new Output_data_plt_s390
<size
>(layout
,
1653 this->got_
, this->got_plt_
, this->got_irelative_
);
1655 // Add unwind information if requested.
1656 if (parameters
->options().ld_generated_unwind_info())
1657 this->plt_
->add_eh_frame(layout
);
1659 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
1661 | elfcpp::SHF_EXECINSTR
),
1662 this->plt_
, ORDER_PLT
, false);
1664 // Make the sh_info field of .rela.plt point to .plt.
1665 Output_section
* rela_plt_os
= this->plt_
->rela_plt()->output_section();
1666 rela_plt_os
->set_info_section(this->plt_
->output_section());
1670 // Create a PLT entry for a global symbol.
1674 Target_s390
<size
>::make_plt_entry(Symbol_table
* symtab
, Layout
* layout
,
1677 if (gsym
->has_plt_offset())
1680 if (this->plt_
== NULL
)
1681 this->make_plt_section(symtab
, layout
);
1683 this->plt_
->add_entry(symtab
, layout
, gsym
);
1686 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
1690 Target_s390
<size
>::make_local_ifunc_plt_entry(
1691 Symbol_table
* symtab
, Layout
* layout
,
1692 Sized_relobj_file
<size
, true>* relobj
,
1693 unsigned int local_sym_index
)
1695 if (relobj
->local_has_plt_offset(local_sym_index
))
1697 if (this->plt_
== NULL
)
1698 this->make_plt_section(symtab
, layout
);
1699 unsigned int plt_offset
= this->plt_
->add_local_ifunc_entry(symtab
, layout
,
1702 relobj
->set_local_plt_offset(local_sym_index
, plt_offset
);
1705 // Return the number of entries in the PLT.
1709 Target_s390
<size
>::plt_entry_count() const
1711 if (this->plt_
== NULL
)
1713 return this->plt_
->entry_count();
1716 // Return the offset of the first non-reserved PLT entry.
1720 Target_s390
<size
>::first_plt_entry_offset() const
1722 return this->plt_
->first_plt_entry_offset();
1725 // Return the size of each PLT entry.
1729 Target_s390
<size
>::plt_entry_size() const
1731 return this->plt_
->get_plt_entry_size();
1734 // Create the GOT and PLT sections for an incremental update.
1737 Output_data_got_base
*
1738 Target_s390
<size
>::init_got_plt_for_update(Symbol_table
* symtab
,
1740 unsigned int got_count
,
1741 unsigned int plt_count
)
1743 gold_assert(this->got_
== NULL
);
1745 // Add the three reserved entries.
1746 this->got_plt_
= new Output_data_got_plt_s390
<size
>(layout
, (plt_count
+ 3) * size
/ 8);
1747 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1749 | elfcpp::SHF_WRITE
),
1750 this->got_plt_
, ORDER_NON_RELRO_FIRST
,
1753 // If there are any IRELATIVE relocations, they get GOT entries in
1754 // .got.plt after the jump slot entries.
1755 this->got_irelative_
= new Output_data_space(0, size
/ 8, "** GOT IRELATIVE PLT");
1756 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1757 elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
,
1758 this->got_irelative_
,
1759 ORDER_NON_RELRO_FIRST
, false);
1761 this->got_
= new Output_data_got
<size
, true>(got_count
* size
/ 8);
1762 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
1764 | elfcpp::SHF_WRITE
),
1765 this->got_
, ORDER_RELRO_LAST
,
1768 // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT.
1769 this->global_offset_table_
=
1770 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
1771 Symbol_table::PREDEFINED
,
1773 0, 0, elfcpp::STT_OBJECT
,
1775 elfcpp::STV_HIDDEN
, 0,
1778 // Create the PLT section.
1779 this->plt_
= new Output_data_plt_s390
<size
>(layout
,
1780 this->got_
, this->got_plt_
, this->got_irelative_
, plt_count
);
1782 // Add unwind information if requested.
1783 if (parameters
->options().ld_generated_unwind_info())
1784 this->plt_
->add_eh_frame(layout
);
1786 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
1787 elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
,
1788 this->plt_
, ORDER_PLT
, false);
1790 // Make the sh_info field of .rela.plt point to .plt.
1791 Output_section
* rela_plt_os
= this->plt_
->rela_plt()->output_section();
1792 rela_plt_os
->set_info_section(this->plt_
->output_section());
1794 // Create the rela_dyn section.
1795 this->rela_dyn_section(layout
);
1800 // Reserve a GOT entry for a local symbol, and regenerate any
1801 // necessary dynamic relocations.
1805 Target_s390
<size
>::reserve_local_got_entry(
1806 unsigned int got_index
,
1807 Sized_relobj
<size
, true>* obj
,
1809 unsigned int got_type
)
1811 unsigned int got_offset
= got_index
* size
/ 8;
1812 Reloc_section
* rela_dyn
= this->rela_dyn_section(NULL
);
1814 this->got_
->reserve_local(got_index
, obj
, r_sym
, got_type
);
1817 case GOT_TYPE_STANDARD
:
1818 if (parameters
->options().output_is_position_independent())
1819 rela_dyn
->add_local_relative(obj
, r_sym
, elfcpp::R_390_RELATIVE
,
1820 this->got_
, got_offset
, 0, false);
1822 case GOT_TYPE_TLS_OFFSET
:
1823 rela_dyn
->add_local(obj
, r_sym
, elfcpp::R_390_TLS_TPOFF
,
1824 this->got_
, got_offset
, 0);
1826 case GOT_TYPE_TLS_PAIR
:
1827 this->got_
->reserve_slot(got_index
+ 1);
1828 rela_dyn
->add_local(obj
, r_sym
, elfcpp::R_390_TLS_DTPMOD
,
1829 this->got_
, got_offset
, 0);
1836 // Reserve a GOT entry for a global symbol, and regenerate any
1837 // necessary dynamic relocations.
1841 Target_s390
<size
>::reserve_global_got_entry(unsigned int got_index
,
1843 unsigned int got_type
)
1845 unsigned int got_offset
= got_index
* size
/ 8;
1846 Reloc_section
* rela_dyn
= this->rela_dyn_section(NULL
);
1848 this->got_
->reserve_global(got_index
, gsym
, got_type
);
1851 case GOT_TYPE_STANDARD
:
1852 if (!gsym
->final_value_is_known())
1854 if (gsym
->is_from_dynobj()
1855 || gsym
->is_undefined()
1856 || gsym
->is_preemptible()
1857 || gsym
->type() == elfcpp::STT_GNU_IFUNC
)
1858 rela_dyn
->add_global(gsym
, elfcpp::R_390_GLOB_DAT
,
1859 this->got_
, got_offset
, 0);
1861 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_RELATIVE
,
1862 this->got_
, got_offset
, 0, false);
1865 case GOT_TYPE_TLS_OFFSET
:
1866 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_TLS_TPOFF
,
1867 this->got_
, got_offset
, 0, false);
1869 case GOT_TYPE_TLS_PAIR
:
1870 this->got_
->reserve_slot(got_index
+ 1);
1871 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_TLS_DTPMOD
,
1872 this->got_
, got_offset
, 0, false);
1873 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_TLS_DTPOFF
,
1874 this->got_
, got_offset
+ size
/ 8, 0, false);
1881 // Register an existing PLT entry for a global symbol.
1885 Target_s390
<size
>::register_global_plt_entry(Symbol_table
* symtab
,
1887 unsigned int plt_index
,
1890 gold_assert(this->plt_
!= NULL
);
1891 gold_assert(!gsym
->has_plt_offset());
1893 this->plt_
->reserve_slot(plt_index
);
1895 gsym
->set_plt_offset((plt_index
+ 1) * this->plt_entry_size());
1897 unsigned int got_offset
= (plt_index
+ 3) * size
/ 8;
1898 this->plt_
->add_relocation(symtab
, layout
, gsym
, got_offset
);
1901 // Force a COPY relocation for a given symbol.
1905 Target_s390
<size
>::emit_copy_reloc(
1906 Symbol_table
* symtab
, Symbol
* sym
, Output_section
* os
, off_t offset
)
1908 this->copy_relocs_
.emit_copy_reloc(symtab
,
1909 symtab
->get_sized_symbol
<size
>(sym
),
1912 this->rela_dyn_section(NULL
));
1915 // Create a GOT entry for the TLS module index.
1919 Target_s390
<size
>::got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
1920 Sized_relobj_file
<size
, true>* object
)
1922 if (this->got_mod_index_offset_
== -1U)
1924 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
1925 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
1926 Output_data_got
<size
, true>* got
= this->got_section(symtab
, layout
);
1927 unsigned int got_offset
= got
->add_constant(0);
1928 rela_dyn
->add_local(object
, 0, elfcpp::R_390_TLS_DTPMOD
, got
,
1930 got
->add_constant(0);
1931 this->got_mod_index_offset_
= got_offset
;
1933 return this->got_mod_index_offset_
;
1936 // Optimize the TLS relocation type based on what we know about the
1937 // symbol. IS_FINAL is true if the final address of this symbol is
1938 // known at link time.
1941 tls::Tls_optimization
1942 Target_s390
<size
>::optimize_tls_reloc(bool is_final
, int r_type
)
1944 // If we are generating a shared library, then we can't do anything
1946 if (parameters
->options().shared())
1947 return tls::TLSOPT_NONE
;
1951 case elfcpp::R_390_TLS_GD32
:
1952 case elfcpp::R_390_TLS_GD64
:
1953 case elfcpp::R_390_TLS_GDCALL
:
1954 // These are General-Dynamic which permits fully general TLS
1955 // access. Since we know that we are generating an executable,
1956 // we can convert this to Initial-Exec. If we also know that
1957 // this is a local symbol, we can further switch to Local-Exec.
1959 return tls::TLSOPT_TO_LE
;
1960 return tls::TLSOPT_TO_IE
;
1962 case elfcpp::R_390_TLS_LDM32
:
1963 case elfcpp::R_390_TLS_LDM64
:
1964 case elfcpp::R_390_TLS_LDO32
:
1965 case elfcpp::R_390_TLS_LDO64
:
1966 case elfcpp::R_390_TLS_LDCALL
:
1967 // This is Local-Dynamic, which refers to a local symbol in the
1968 // dynamic TLS block. Since we know that we generating an
1969 // executable, we can switch to Local-Exec.
1970 return tls::TLSOPT_TO_LE
;
1972 case elfcpp::R_390_TLS_IE32
:
1973 case elfcpp::R_390_TLS_IE64
:
1974 case elfcpp::R_390_TLS_GOTIE32
:
1975 case elfcpp::R_390_TLS_GOTIE64
:
1976 case elfcpp::R_390_TLS_LOAD
:
1977 // These are Initial-Exec relocs which get the thread offset
1978 // from the GOT. If we know that we are linking against the
1979 // local symbol, we can switch to Local-Exec, which links the
1980 // thread offset into the instruction.
1982 return tls::TLSOPT_TO_LE
;
1983 return tls::TLSOPT_NONE
;
1985 case elfcpp::R_390_TLS_GOTIE12
:
1986 case elfcpp::R_390_TLS_IEENT
:
1987 case elfcpp::R_390_TLS_GOTIE20
:
1988 // These are Initial-Exec, but cannot be optimized.
1989 return tls::TLSOPT_NONE
;
1991 case elfcpp::R_390_TLS_LE32
:
1992 case elfcpp::R_390_TLS_LE64
:
1993 // When we already have Local-Exec, there is nothing further we
1995 return tls::TLSOPT_NONE
;
2002 // Get the Reference_flags for a particular relocation.
2006 Target_s390
<size
>::Scan::get_reference_flags(unsigned int r_type
)
2010 case elfcpp::R_390_NONE
:
2011 case elfcpp::R_390_GNU_VTINHERIT
:
2012 case elfcpp::R_390_GNU_VTENTRY
:
2013 case elfcpp::R_390_GOTPC
:
2014 case elfcpp::R_390_GOTPCDBL
:
2015 // No symbol reference.
2018 case elfcpp::R_390_64
:
2019 case elfcpp::R_390_32
:
2020 case elfcpp::R_390_20
:
2021 case elfcpp::R_390_16
:
2022 case elfcpp::R_390_12
:
2023 case elfcpp::R_390_8
:
2024 return Symbol::ABSOLUTE_REF
;
2026 case elfcpp::R_390_PC12DBL
:
2027 case elfcpp::R_390_PC16
:
2028 case elfcpp::R_390_PC16DBL
:
2029 case elfcpp::R_390_PC24DBL
:
2030 case elfcpp::R_390_PC32
:
2031 case elfcpp::R_390_PC32DBL
:
2032 case elfcpp::R_390_PC64
:
2033 case elfcpp::R_390_GOTOFF16
:
2034 case elfcpp::R_390_GOTOFF32
:
2035 case elfcpp::R_390_GOTOFF64
:
2036 return Symbol::RELATIVE_REF
;
2038 case elfcpp::R_390_PLT12DBL
:
2039 case elfcpp::R_390_PLT16DBL
:
2040 case elfcpp::R_390_PLT24DBL
:
2041 case elfcpp::R_390_PLT32
:
2042 case elfcpp::R_390_PLT32DBL
:
2043 case elfcpp::R_390_PLT64
:
2044 case elfcpp::R_390_PLTOFF16
:
2045 case elfcpp::R_390_PLTOFF32
:
2046 case elfcpp::R_390_PLTOFF64
:
2047 return Symbol::FUNCTION_CALL
| Symbol::RELATIVE_REF
;
2049 case elfcpp::R_390_GOT12
:
2050 case elfcpp::R_390_GOT16
:
2051 case elfcpp::R_390_GOT20
:
2052 case elfcpp::R_390_GOT32
:
2053 case elfcpp::R_390_GOT64
:
2054 case elfcpp::R_390_GOTENT
:
2055 case elfcpp::R_390_GOTPLT12
:
2056 case elfcpp::R_390_GOTPLT16
:
2057 case elfcpp::R_390_GOTPLT20
:
2058 case elfcpp::R_390_GOTPLT32
:
2059 case elfcpp::R_390_GOTPLT64
:
2060 case elfcpp::R_390_GOTPLTENT
:
2062 return Symbol::ABSOLUTE_REF
;
2064 case elfcpp::R_390_TLS_GD32
: // Global-dynamic
2065 case elfcpp::R_390_TLS_GD64
:
2066 case elfcpp::R_390_TLS_GDCALL
:
2067 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
2068 case elfcpp::R_390_TLS_LDM64
:
2069 case elfcpp::R_390_TLS_LDO32
:
2070 case elfcpp::R_390_TLS_LDO64
:
2071 case elfcpp::R_390_TLS_LDCALL
:
2072 case elfcpp::R_390_TLS_IE32
: // Initial-exec
2073 case elfcpp::R_390_TLS_IE64
:
2074 case elfcpp::R_390_TLS_IEENT
:
2075 case elfcpp::R_390_TLS_GOTIE12
:
2076 case elfcpp::R_390_TLS_GOTIE20
:
2077 case elfcpp::R_390_TLS_GOTIE32
:
2078 case elfcpp::R_390_TLS_GOTIE64
:
2079 case elfcpp::R_390_TLS_LOAD
:
2080 case elfcpp::R_390_TLS_LE32
: // Local-exec
2081 case elfcpp::R_390_TLS_LE64
:
2082 return Symbol::TLS_REF
;
2084 case elfcpp::R_390_COPY
:
2085 case elfcpp::R_390_GLOB_DAT
:
2086 case elfcpp::R_390_JMP_SLOT
:
2087 case elfcpp::R_390_RELATIVE
:
2088 case elfcpp::R_390_IRELATIVE
:
2089 case elfcpp::R_390_TLS_TPOFF
:
2090 case elfcpp::R_390_TLS_DTPOFF
:
2091 case elfcpp::R_390_TLS_DTPMOD
:
2093 // Not expected. We will give an error later.
2098 // Report an unsupported relocation against a local symbol.
2102 Target_s390
<size
>::Scan::unsupported_reloc_local(
2103 Sized_relobj_file
<size
, true>* object
,
2104 unsigned int r_type
)
2106 gold_error(_("%s: unsupported reloc %u against local symbol"),
2107 object
->name().c_str(), r_type
);
2110 // We are about to emit a dynamic relocation of type R_TYPE. If the
2111 // dynamic linker does not support it, issue an error.
2115 Target_s390
<size
>::Scan::check_non_pic(Relobj
* object
, unsigned int r_type
)
2117 gold_assert(r_type
!= elfcpp::R_390_NONE
);
2123 // These are the relocation types supported by glibc for s390 64-bit.
2124 case elfcpp::R_390_RELATIVE
:
2125 case elfcpp::R_390_IRELATIVE
:
2126 case elfcpp::R_390_COPY
:
2127 case elfcpp::R_390_GLOB_DAT
:
2128 case elfcpp::R_390_JMP_SLOT
:
2129 case elfcpp::R_390_TLS_DTPMOD
:
2130 case elfcpp::R_390_TLS_DTPOFF
:
2131 case elfcpp::R_390_TLS_TPOFF
:
2132 case elfcpp::R_390_8
:
2133 case elfcpp::R_390_16
:
2134 case elfcpp::R_390_32
:
2135 case elfcpp::R_390_64
:
2136 case elfcpp::R_390_PC16
:
2137 case elfcpp::R_390_PC16DBL
:
2138 case elfcpp::R_390_PC32
:
2139 case elfcpp::R_390_PC32DBL
:
2140 case elfcpp::R_390_PC64
:
2151 // These are the relocation types supported by glibc for s390 32-bit.
2152 case elfcpp::R_390_RELATIVE
:
2153 case elfcpp::R_390_IRELATIVE
:
2154 case elfcpp::R_390_COPY
:
2155 case elfcpp::R_390_GLOB_DAT
:
2156 case elfcpp::R_390_JMP_SLOT
:
2157 case elfcpp::R_390_TLS_DTPMOD
:
2158 case elfcpp::R_390_TLS_DTPOFF
:
2159 case elfcpp::R_390_TLS_TPOFF
:
2160 case elfcpp::R_390_8
:
2161 case elfcpp::R_390_16
:
2162 case elfcpp::R_390_32
:
2163 case elfcpp::R_390_PC16
:
2164 case elfcpp::R_390_PC16DBL
:
2165 case elfcpp::R_390_PC32
:
2166 case elfcpp::R_390_PC32DBL
:
2174 // This prevents us from issuing more than one error per reloc
2175 // section. But we can still wind up issuing more than one
2176 // error per object file.
2177 if (this->issued_non_pic_error_
)
2179 gold_assert(parameters
->options().output_is_position_independent());
2180 object
->error(_("requires unsupported dynamic reloc; "
2181 "recompile with -fPIC"));
2182 this->issued_non_pic_error_
= true;
2186 // Return whether we need to make a PLT entry for a relocation of the
2187 // given type against a STT_GNU_IFUNC symbol.
2191 Target_s390
<size
>::Scan::reloc_needs_plt_for_ifunc(
2192 Sized_relobj_file
<size
, true>* object
,
2193 unsigned int r_type
)
2195 int flags
= Scan::get_reference_flags(r_type
);
2196 if (flags
& Symbol::TLS_REF
)
2197 gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
2198 object
->name().c_str(), r_type
);
2202 // Scan a relocation for a local symbol.
2206 Target_s390
<size
>::Scan::local(Symbol_table
* symtab
,
2208 Target_s390
<size
>* target
,
2209 Sized_relobj_file
<size
, true>* object
,
2210 unsigned int data_shndx
,
2211 Output_section
* output_section
,
2212 const elfcpp::Rela
<size
, true>& reloc
,
2213 unsigned int r_type
,
2214 const elfcpp::Sym
<size
, true>& lsym
,
2220 // A local STT_GNU_IFUNC symbol may require a PLT entry.
2221 bool is_ifunc
= lsym
.get_st_type() == elfcpp::STT_GNU_IFUNC
;
2223 if (is_ifunc
&& this->reloc_needs_plt_for_ifunc(object
, r_type
))
2225 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2226 target
->make_local_ifunc_plt_entry(symtab
, layout
, object
, r_sym
);
2231 case elfcpp::R_390_NONE
:
2232 case elfcpp::R_390_GNU_VTINHERIT
:
2233 case elfcpp::R_390_GNU_VTENTRY
:
2236 case elfcpp::R_390_64
:
2237 // If building a shared library (or a position-independent
2238 // executable), we need to create a dynamic relocation for this
2239 // location. The relocation applied at link time will apply the
2240 // link-time value, so we flag the location with an
2241 // R_390_RELATIVE relocation so the dynamic loader can
2242 // relocate it easily.
2243 if (parameters
->options().output_is_position_independent() && size
== 64)
2245 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2246 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2247 rela_dyn
->add_local_relative(object
, r_sym
,
2248 elfcpp::R_390_RELATIVE
,
2249 output_section
, data_shndx
,
2250 reloc
.get_r_offset(),
2251 reloc
.get_r_addend(), is_ifunc
);
2255 case elfcpp::R_390_32
:
2256 case elfcpp::R_390_20
:
2257 case elfcpp::R_390_16
:
2258 case elfcpp::R_390_12
:
2259 case elfcpp::R_390_8
:
2260 if (parameters
->options().output_is_position_independent())
2262 if (size
== 32 && r_type
== elfcpp::R_390_32
)
2264 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2265 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2266 rela_dyn
->add_local_relative(object
, r_sym
,
2267 elfcpp::R_390_RELATIVE
,
2268 output_section
, data_shndx
,
2269 reloc
.get_r_offset(),
2270 reloc
.get_r_addend(), is_ifunc
);
2274 check_non_pic(object
, r_type
);
2276 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2277 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2278 if (lsym
.get_st_type() != elfcpp::STT_SECTION
)
2279 rela_dyn
->add_local(object
, r_sym
, r_type
, output_section
,
2280 data_shndx
, reloc
.get_r_offset(),
2281 reloc
.get_r_addend());
2284 gold_assert(lsym
.get_st_value() == 0);
2285 unsigned int shndx
= lsym
.get_st_shndx();
2287 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
,
2290 object
->error(_("section symbol %u has bad shndx %u"),
2293 rela_dyn
->add_local_section(object
, shndx
,
2294 r_type
, output_section
,
2295 data_shndx
, reloc
.get_r_offset(),
2296 reloc
.get_r_addend());
2301 case elfcpp::R_390_PC12DBL
:
2302 case elfcpp::R_390_PC16
:
2303 case elfcpp::R_390_PC16DBL
:
2304 case elfcpp::R_390_PC24DBL
:
2305 case elfcpp::R_390_PC32
:
2306 case elfcpp::R_390_PC32DBL
:
2307 case elfcpp::R_390_PC64
:
2310 case elfcpp::R_390_PLT12DBL
:
2311 case elfcpp::R_390_PLT16DBL
:
2312 case elfcpp::R_390_PLT24DBL
:
2313 case elfcpp::R_390_PLT32
:
2314 case elfcpp::R_390_PLT32DBL
:
2315 case elfcpp::R_390_PLT64
:
2316 // Since we know this is a local symbol, we can handle this as a
2320 case elfcpp::R_390_GOTPC
:
2321 case elfcpp::R_390_GOTPCDBL
:
2322 case elfcpp::R_390_GOTOFF16
:
2323 case elfcpp::R_390_GOTOFF32
:
2324 case elfcpp::R_390_GOTOFF64
:
2325 case elfcpp::R_390_PLTOFF16
:
2326 case elfcpp::R_390_PLTOFF32
:
2327 case elfcpp::R_390_PLTOFF64
:
2328 // We need a GOT section.
2329 target
->got_section(symtab
, layout
);
2330 // For PLTOFF*, we'd normally want a PLT section, but since we
2331 // know this is a local symbol, no PLT is needed.
2334 case elfcpp::R_390_GOT12
:
2335 case elfcpp::R_390_GOT16
:
2336 case elfcpp::R_390_GOT20
:
2337 case elfcpp::R_390_GOT32
:
2338 case elfcpp::R_390_GOT64
:
2339 case elfcpp::R_390_GOTENT
:
2340 case elfcpp::R_390_GOTPLT12
:
2341 case elfcpp::R_390_GOTPLT16
:
2342 case elfcpp::R_390_GOTPLT20
:
2343 case elfcpp::R_390_GOTPLT32
:
2344 case elfcpp::R_390_GOTPLT64
:
2345 case elfcpp::R_390_GOTPLTENT
:
2347 // The symbol requires a GOT section.
2348 Output_data_got
<size
, true>* got
= target
->got_section(symtab
, layout
);
2350 // The symbol requires a GOT entry.
2351 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2353 // For a STT_GNU_IFUNC symbol we want the PLT offset. That
2354 // lets function pointers compare correctly with shared
2355 // libraries. Otherwise we would need an IRELATIVE reloc.
2358 is_new
= got
->add_local_plt(object
, r_sym
, GOT_TYPE_STANDARD
);
2360 is_new
= got
->add_local(object
, r_sym
, GOT_TYPE_STANDARD
);
2363 // If we are generating a shared object, we need to add a
2364 // dynamic relocation for this symbol's GOT entry.
2365 if (parameters
->options().output_is_position_independent())
2367 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2368 unsigned int got_offset
=
2369 object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
2370 rela_dyn
->add_local_relative(object
, r_sym
,
2371 elfcpp::R_390_RELATIVE
,
2372 got
, got_offset
, 0, is_ifunc
);
2375 // For GOTPLT*, we'd normally want a PLT section, but since
2376 // we know this is a local symbol, no PLT is needed.
2380 case elfcpp::R_390_COPY
:
2381 case elfcpp::R_390_GLOB_DAT
:
2382 case elfcpp::R_390_JMP_SLOT
:
2383 case elfcpp::R_390_RELATIVE
:
2384 case elfcpp::R_390_IRELATIVE
:
2385 // These are outstanding tls relocs, which are unexpected when linking
2386 case elfcpp::R_390_TLS_TPOFF
:
2387 case elfcpp::R_390_TLS_DTPOFF
:
2388 case elfcpp::R_390_TLS_DTPMOD
:
2389 gold_error(_("%s: unexpected reloc %u in object file"),
2390 object
->name().c_str(), r_type
);
2393 // These are initial tls relocs, which are expected when linking
2394 case elfcpp::R_390_TLS_GD32
: // Global-dynamic
2395 case elfcpp::R_390_TLS_GD64
:
2396 case elfcpp::R_390_TLS_GDCALL
:
2397 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
2398 case elfcpp::R_390_TLS_LDM64
:
2399 case elfcpp::R_390_TLS_LDO32
:
2400 case elfcpp::R_390_TLS_LDO64
:
2401 case elfcpp::R_390_TLS_LDCALL
:
2402 case elfcpp::R_390_TLS_IE32
: // Initial-exec
2403 case elfcpp::R_390_TLS_IE64
:
2404 case elfcpp::R_390_TLS_IEENT
:
2405 case elfcpp::R_390_TLS_GOTIE12
:
2406 case elfcpp::R_390_TLS_GOTIE20
:
2407 case elfcpp::R_390_TLS_GOTIE32
:
2408 case elfcpp::R_390_TLS_GOTIE64
:
2409 case elfcpp::R_390_TLS_LOAD
:
2410 case elfcpp::R_390_TLS_LE32
: // Local-exec
2411 case elfcpp::R_390_TLS_LE64
:
2413 bool output_is_shared
= parameters
->options().shared();
2414 const tls::Tls_optimization optimized_type
2415 = Target_s390
<size
>::optimize_tls_reloc(!output_is_shared
,
2419 case elfcpp::R_390_TLS_GD32
: // General-dynamic
2420 case elfcpp::R_390_TLS_GD64
:
2421 case elfcpp::R_390_TLS_GDCALL
:
2422 if (optimized_type
== tls::TLSOPT_NONE
)
2424 // Create a pair of GOT entries for the module index and
2425 // dtv-relative offset.
2426 Output_data_got
<size
, true>* got
2427 = target
->got_section(symtab
, layout
);
2428 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2429 unsigned int shndx
= lsym
.get_st_shndx();
2431 shndx
= object
->adjust_sym_shndx(r_sym
, shndx
, &is_ordinary
);
2433 object
->error(_("local symbol %u has bad shndx %u"),
2436 got
->add_local_pair_with_rel(object
, r_sym
,
2439 target
->rela_dyn_section(layout
),
2440 elfcpp::R_390_TLS_DTPMOD
);
2442 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2443 unsupported_reloc_local(object
, r_type
);
2446 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
2447 case elfcpp::R_390_TLS_LDM64
:
2448 case elfcpp::R_390_TLS_LDCALL
:
2449 if (optimized_type
== tls::TLSOPT_NONE
)
2451 // Create a GOT entry for the module index.
2452 target
->got_mod_index_entry(symtab
, layout
, object
);
2454 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2455 unsupported_reloc_local(object
, r_type
);
2458 case elfcpp::R_390_TLS_LDO32
:
2459 case elfcpp::R_390_TLS_LDO64
:
2462 case elfcpp::R_390_TLS_IE32
: // Initial-exec
2463 case elfcpp::R_390_TLS_IE64
:
2464 // These two involve an absolute address
2465 if (parameters
->options().shared()
2466 && optimized_type
== tls::TLSOPT_NONE
)
2468 if ((size
== 32 && r_type
== elfcpp::R_390_TLS_IE32
) ||
2469 (size
== 64 && r_type
== elfcpp::R_390_TLS_IE64
))
2471 // We need to create a dynamic relocation.
2472 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2473 unsigned int r_sym
=
2474 elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2475 rela_dyn
->add_local_relative(object
, r_sym
,
2476 elfcpp::R_390_RELATIVE
,
2477 output_section
, data_shndx
,
2478 reloc
.get_r_offset(),
2479 reloc
.get_r_addend(), false);
2483 unsupported_reloc_local(object
, r_type
);
2487 case elfcpp::R_390_TLS_IEENT
:
2488 case elfcpp::R_390_TLS_GOTIE12
:
2489 case elfcpp::R_390_TLS_GOTIE20
:
2490 case elfcpp::R_390_TLS_GOTIE32
:
2491 case elfcpp::R_390_TLS_GOTIE64
:
2492 case elfcpp::R_390_TLS_LOAD
:
2493 layout
->set_has_static_tls();
2494 if (optimized_type
== tls::TLSOPT_NONE
)
2496 if (!output_is_shared
)
2498 // We're making an executable, and the symbol is local, but
2499 // we cannot optimize to LE. Make a const GOT entry instead.
2500 Output_data_got
<size
, true>* got
2501 = target
->got_section(symtab
, layout
);
2503 = elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2504 got
->add_local_plt(object
, r_sym
, GOT_TYPE_TLS_OFFSET
);
2508 // Create a GOT entry for the tp-relative offset.
2509 Output_data_got
<size
, true>* got
2510 = target
->got_section(symtab
, layout
);
2512 = elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2513 got
->add_local_with_rel(object
, r_sym
, GOT_TYPE_TLS_OFFSET
,
2514 target
->rela_dyn_section(layout
),
2515 elfcpp::R_390_TLS_TPOFF
);
2518 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2519 unsupported_reloc_local(object
, r_type
);
2522 case elfcpp::R_390_TLS_LE32
: // Local-exec
2523 case elfcpp::R_390_TLS_LE64
:
2524 layout
->set_has_static_tls();
2525 if (output_is_shared
)
2527 // We need to create a dynamic relocation.
2528 if ((size
== 32 && r_type
== elfcpp::R_390_TLS_LE32
) ||
2529 (size
== 64 && r_type
== elfcpp::R_390_TLS_LE64
))
2531 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2533 = elfcpp::elf_r_sym
<size
>(reloc
.get_r_info());
2534 gold_assert(lsym
.get_st_type() != elfcpp::STT_SECTION
);
2535 rela_dyn
->add_local(object
, r_sym
, elfcpp::R_390_TLS_TPOFF
,
2536 output_section
, data_shndx
,
2537 reloc
.get_r_offset(),
2538 reloc
.get_r_addend());
2542 unsupported_reloc_local(object
, r_type
);
2554 gold_error(_("%s: unsupported reloc %u against local symbol"),
2555 object
->name().c_str(), r_type
);
2560 // Scan a relocation for a global symbol.
2564 Target_s390
<size
>::Scan::global(Symbol_table
* symtab
,
2566 Target_s390
<size
>* target
,
2567 Sized_relobj_file
<size
, true>* object
,
2568 unsigned int data_shndx
,
2569 Output_section
* output_section
,
2570 const elfcpp::Rela
<size
, true>& reloc
,
2571 unsigned int r_type
,
2574 // A STT_GNU_IFUNC symbol may require a PLT entry.
2575 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
2576 && this->reloc_needs_plt_for_ifunc(object
, r_type
))
2577 target
->make_plt_entry(symtab
, layout
, gsym
);
2581 case elfcpp::R_390_NONE
:
2582 case elfcpp::R_390_GNU_VTINHERIT
:
2583 case elfcpp::R_390_GNU_VTENTRY
:
2586 case elfcpp::R_390_64
:
2587 case elfcpp::R_390_32
:
2588 case elfcpp::R_390_20
:
2589 case elfcpp::R_390_16
:
2590 case elfcpp::R_390_12
:
2591 case elfcpp::R_390_8
:
2593 // Make a PLT entry if necessary.
2594 if (gsym
->needs_plt_entry())
2596 target
->make_plt_entry(symtab
, layout
, gsym
);
2597 // Since this is not a PC-relative relocation, we may be
2598 // taking the address of a function. In that case we need to
2599 // set the entry in the dynamic symbol table to the address of
2601 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
2602 gsym
->set_needs_dynsym_value();
2604 // Make a dynamic relocation if necessary.
2605 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
2607 if (!parameters
->options().output_is_position_independent()
2608 && gsym
->may_need_copy_reloc())
2610 target
->copy_reloc(symtab
, layout
, object
,
2611 data_shndx
, output_section
, gsym
, reloc
);
2613 else if (((size
== 64 && r_type
== elfcpp::R_390_64
)
2614 || (size
== 32 && r_type
== elfcpp::R_390_32
))
2615 && gsym
->type() == elfcpp::STT_GNU_IFUNC
2616 && gsym
->can_use_relative_reloc(false)
2617 && !gsym
->is_from_dynobj()
2618 && !gsym
->is_undefined()
2619 && !gsym
->is_preemptible())
2621 // Use an IRELATIVE reloc for a locally defined
2622 // STT_GNU_IFUNC symbol. This makes a function
2623 // address in a PIE executable match the address in a
2624 // shared library that it links against.
2625 Reloc_section
* rela_dyn
=
2626 target
->rela_irelative_section(layout
);
2627 unsigned int r_type
= elfcpp::R_390_IRELATIVE
;
2628 rela_dyn
->add_symbolless_global_addend(gsym
, r_type
,
2629 output_section
, object
,
2631 reloc
.get_r_offset(),
2632 reloc
.get_r_addend());
2634 else if (((size
== 64 && r_type
== elfcpp::R_390_64
)
2635 || (size
== 32 && r_type
== elfcpp::R_390_32
))
2636 && gsym
->can_use_relative_reloc(false))
2638 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2639 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_RELATIVE
,
2640 output_section
, object
,
2642 reloc
.get_r_offset(),
2643 reloc
.get_r_addend(), false);
2647 check_non_pic(object
, r_type
);
2648 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2649 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
2650 data_shndx
, reloc
.get_r_offset(),
2651 reloc
.get_r_addend());
2657 case elfcpp::R_390_PC12DBL
:
2658 case elfcpp::R_390_PC16
:
2659 case elfcpp::R_390_PC16DBL
:
2660 case elfcpp::R_390_PC24DBL
:
2661 case elfcpp::R_390_PC32
:
2662 case elfcpp::R_390_PC32DBL
:
2663 case elfcpp::R_390_PC64
:
2665 // Make a PLT entry if necessary.
2666 if (gsym
->needs_plt_entry())
2668 target
->make_plt_entry(symtab
, layout
, gsym
);
2669 // larl is often used to take address of a function. Aim the
2670 // symbol at the PLT entry.
2671 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
2672 gsym
->set_needs_dynsym_value();
2674 // Make a dynamic relocation if necessary.
2675 if (gsym
->needs_dynamic_reloc(Scan::get_reference_flags(r_type
)))
2677 if (parameters
->options().output_is_executable()
2678 && gsym
->may_need_copy_reloc())
2680 target
->copy_reloc(symtab
, layout
, object
,
2681 data_shndx
, output_section
, gsym
, reloc
);
2685 check_non_pic(object
, r_type
);
2686 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2687 rela_dyn
->add_global(gsym
, r_type
, output_section
, object
,
2688 data_shndx
, reloc
.get_r_offset(),
2689 reloc
.get_r_addend());
2695 case elfcpp::R_390_PLT12DBL
:
2696 case elfcpp::R_390_PLT16DBL
:
2697 case elfcpp::R_390_PLT24DBL
:
2698 case elfcpp::R_390_PLT32
:
2699 case elfcpp::R_390_PLT32DBL
:
2700 case elfcpp::R_390_PLT64
:
2701 // If the symbol is fully resolved, this is just a PC32 reloc.
2702 // Otherwise we need a PLT entry.
2703 if (gsym
->final_value_is_known())
2705 // If building a shared library, we can also skip the PLT entry
2706 // if the symbol is defined in the output file and is protected
2708 if (gsym
->is_defined()
2709 && !gsym
->is_from_dynobj()
2710 && !gsym
->is_preemptible())
2712 target
->make_plt_entry(symtab
, layout
, gsym
);
2715 case elfcpp::R_390_GOTPC
:
2716 case elfcpp::R_390_GOTPCDBL
:
2717 case elfcpp::R_390_GOTOFF16
:
2718 case elfcpp::R_390_GOTOFF32
:
2719 case elfcpp::R_390_GOTOFF64
:
2720 case elfcpp::R_390_PLTOFF16
:
2721 case elfcpp::R_390_PLTOFF32
:
2722 case elfcpp::R_390_PLTOFF64
:
2723 // We need a GOT section.
2724 target
->got_section(symtab
, layout
);
2725 // For PLTOFF*, we also need a PLT entry (but only if the
2726 // symbol is not fully resolved).
2727 if ((r_type
== elfcpp::R_390_PLTOFF16
2728 || r_type
== elfcpp::R_390_PLTOFF32
2729 || r_type
== elfcpp::R_390_PLTOFF64
)
2730 && !gsym
->final_value_is_known())
2731 target
->make_plt_entry(symtab
, layout
, gsym
);
2734 case elfcpp::R_390_GOT12
:
2735 case elfcpp::R_390_GOT16
:
2736 case elfcpp::R_390_GOT20
:
2737 case elfcpp::R_390_GOT32
:
2738 case elfcpp::R_390_GOT64
:
2739 case elfcpp::R_390_GOTENT
:
2740 case elfcpp::R_390_GOTPLT12
:
2741 case elfcpp::R_390_GOTPLT16
:
2742 case elfcpp::R_390_GOTPLT20
:
2743 case elfcpp::R_390_GOTPLT32
:
2744 case elfcpp::R_390_GOTPLT64
:
2745 case elfcpp::R_390_GOTPLTENT
:
2747 // The symbol requires a GOT entry.
2748 Output_data_got
<size
, true>* got
= target
->got_section(symtab
, layout
);
2750 if (gsym
->final_value_is_known())
2752 // For a STT_GNU_IFUNC symbol we want the PLT address.
2753 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
2754 got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
2756 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
2760 // If this symbol is not fully resolved, we need to add a
2761 // dynamic relocation for it.
2762 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2764 // Use a GLOB_DAT rather than a RELATIVE reloc if:
2766 // 1) The symbol may be defined in some other module.
2768 // 2) We are building a shared library and this is a
2769 // protected symbol; using GLOB_DAT means that the dynamic
2770 // linker can use the address of the PLT in the main
2771 // executable when appropriate so that function address
2772 // comparisons work.
2774 // 3) This is a STT_GNU_IFUNC symbol in position dependent
2775 // code, again so that function address comparisons work.
2776 if (gsym
->is_from_dynobj()
2777 || gsym
->is_undefined()
2778 || gsym
->is_preemptible()
2779 || (gsym
->visibility() == elfcpp::STV_PROTECTED
2780 && parameters
->options().shared())
2781 || (gsym
->type() == elfcpp::STT_GNU_IFUNC
2782 && parameters
->options().output_is_position_independent()))
2783 got
->add_global_with_rel(gsym
, GOT_TYPE_STANDARD
, rela_dyn
,
2784 elfcpp::R_390_GLOB_DAT
);
2787 // For a STT_GNU_IFUNC symbol we want to write the PLT
2788 // offset into the GOT, so that function pointer
2789 // comparisons work correctly.
2791 if (gsym
->type() != elfcpp::STT_GNU_IFUNC
)
2792 is_new
= got
->add_global(gsym
, GOT_TYPE_STANDARD
);
2795 is_new
= got
->add_global_plt(gsym
, GOT_TYPE_STANDARD
);
2796 // Tell the dynamic linker to use the PLT address
2797 // when resolving relocations.
2798 if (gsym
->is_from_dynobj()
2799 && !parameters
->options().shared())
2800 gsym
->set_needs_dynsym_value();
2804 unsigned int got_off
= gsym
->got_offset(GOT_TYPE_STANDARD
);
2805 rela_dyn
->add_global_relative(gsym
,
2806 elfcpp::R_390_RELATIVE
,
2807 got
, got_off
, 0, false);
2814 case elfcpp::R_390_COPY
:
2815 case elfcpp::R_390_GLOB_DAT
:
2816 case elfcpp::R_390_JMP_SLOT
:
2817 case elfcpp::R_390_RELATIVE
:
2818 case elfcpp::R_390_IRELATIVE
:
2819 // These are outstanding tls relocs, which are unexpected when linking
2820 case elfcpp::R_390_TLS_TPOFF
:
2821 case elfcpp::R_390_TLS_DTPOFF
:
2822 case elfcpp::R_390_TLS_DTPMOD
:
2823 gold_error(_("%s: unexpected reloc %u in object file"),
2824 object
->name().c_str(), r_type
);
2827 // These are initial tls relocs, which are expected for global()
2828 case elfcpp::R_390_TLS_GD32
: // Global-dynamic
2829 case elfcpp::R_390_TLS_GD64
:
2830 case elfcpp::R_390_TLS_GDCALL
:
2831 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
2832 case elfcpp::R_390_TLS_LDM64
:
2833 case elfcpp::R_390_TLS_LDO32
:
2834 case elfcpp::R_390_TLS_LDO64
:
2835 case elfcpp::R_390_TLS_LDCALL
:
2836 case elfcpp::R_390_TLS_IE32
: // Initial-exec
2837 case elfcpp::R_390_TLS_IE64
:
2838 case elfcpp::R_390_TLS_IEENT
:
2839 case elfcpp::R_390_TLS_GOTIE12
:
2840 case elfcpp::R_390_TLS_GOTIE20
:
2841 case elfcpp::R_390_TLS_GOTIE32
:
2842 case elfcpp::R_390_TLS_GOTIE64
:
2843 case elfcpp::R_390_TLS_LOAD
:
2844 case elfcpp::R_390_TLS_LE32
: // Local-exec
2845 case elfcpp::R_390_TLS_LE64
:
2847 // For the optimizable Initial-Exec model, we can treat undef symbols
2848 // as final when building an executable.
2849 const bool is_final
= (gsym
->final_value_is_known() ||
2850 ((r_type
== elfcpp::R_390_TLS_IE32
||
2851 r_type
== elfcpp::R_390_TLS_IE64
||
2852 r_type
== elfcpp::R_390_TLS_GOTIE32
||
2853 r_type
== elfcpp::R_390_TLS_GOTIE64
) &&
2854 gsym
->is_undefined() &&
2855 parameters
->options().output_is_executable()));
2856 const tls::Tls_optimization optimized_type
2857 = Target_s390
<size
>::optimize_tls_reloc(is_final
, r_type
);
2860 case elfcpp::R_390_TLS_GD32
: // General-dynamic
2861 case elfcpp::R_390_TLS_GD64
:
2862 case elfcpp::R_390_TLS_GDCALL
:
2863 if (optimized_type
== tls::TLSOPT_NONE
)
2865 // Create a pair of GOT entries for the module index and
2866 // dtv-relative offset.
2867 Output_data_got
<size
, true>* got
2868 = target
->got_section(symtab
, layout
);
2869 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLS_PAIR
,
2870 target
->rela_dyn_section(layout
),
2871 elfcpp::R_390_TLS_DTPMOD
,
2872 elfcpp::R_390_TLS_DTPOFF
);
2874 else if (optimized_type
== tls::TLSOPT_TO_IE
)
2876 // Create a GOT entry for the tp-relative offset.
2877 Output_data_got
<size
, true>* got
2878 = target
->got_section(symtab
, layout
);
2879 got
->add_global_with_rel(gsym
, GOT_TYPE_TLS_OFFSET
,
2880 target
->rela_dyn_section(layout
),
2881 elfcpp::R_390_TLS_TPOFF
);
2883 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2884 unsupported_reloc_global(object
, r_type
, gsym
);
2887 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
2888 case elfcpp::R_390_TLS_LDM64
:
2889 case elfcpp::R_390_TLS_LDCALL
:
2890 if (optimized_type
== tls::TLSOPT_NONE
)
2892 // Create a GOT entry for the module index.
2893 target
->got_mod_index_entry(symtab
, layout
, object
);
2895 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2896 unsupported_reloc_global(object
, r_type
, gsym
);
2899 case elfcpp::R_390_TLS_LDO32
:
2900 case elfcpp::R_390_TLS_LDO64
:
2903 case elfcpp::R_390_TLS_IE32
: // Initial-exec
2904 case elfcpp::R_390_TLS_IE64
:
2905 // These two involve an absolute address
2906 if (parameters
->options().shared())
2908 if ((size
== 32 && r_type
== elfcpp::R_390_TLS_IE32
) ||
2909 (size
== 64 && r_type
== elfcpp::R_390_TLS_IE64
))
2911 // We need to create a dynamic relocation.
2912 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2913 rela_dyn
->add_global_relative(gsym
, elfcpp::R_390_RELATIVE
,
2914 output_section
, object
,
2916 reloc
.get_r_offset(),
2917 reloc
.get_r_addend(), false);
2921 unsupported_reloc_global(object
, r_type
, gsym
);
2925 case elfcpp::R_390_TLS_IEENT
:
2926 case elfcpp::R_390_TLS_GOTIE12
:
2927 case elfcpp::R_390_TLS_GOTIE20
:
2928 case elfcpp::R_390_TLS_GOTIE32
:
2929 case elfcpp::R_390_TLS_GOTIE64
:
2930 case elfcpp::R_390_TLS_LOAD
:
2931 layout
->set_has_static_tls();
2932 if (optimized_type
== tls::TLSOPT_NONE
)
2934 if (is_final
&& !parameters
->options().shared())
2936 // We're making an executable, and the symbol is local, but
2937 // we cannot optimize to LE. Make a const GOT entry instead.
2938 Output_data_got
<size
, true>* got
2939 = target
->got_section(symtab
, layout
);
2940 got
->add_global_plt(gsym
, GOT_TYPE_TLS_OFFSET
);
2944 // Create a GOT entry for the tp-relative offset.
2945 Output_data_got
<size
, true>* got
2946 = target
->got_section(symtab
, layout
);
2947 got
->add_global_with_rel(gsym
, GOT_TYPE_TLS_OFFSET
,
2948 target
->rela_dyn_section(layout
),
2949 elfcpp::R_390_TLS_TPOFF
);
2952 else if (optimized_type
!= tls::TLSOPT_TO_LE
)
2953 unsupported_reloc_global(object
, r_type
, gsym
);
2956 case elfcpp::R_390_TLS_LE32
: // Local-exec
2957 case elfcpp::R_390_TLS_LE64
:
2958 layout
->set_has_static_tls();
2959 if (parameters
->options().shared())
2961 // We need to create a dynamic relocation.
2962 if ((size
== 32 && r_type
== elfcpp::R_390_TLS_LE32
) ||
2963 (size
== 64 && r_type
== elfcpp::R_390_TLS_LE64
))
2965 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
2966 rela_dyn
->add_global(gsym
, elfcpp::R_390_TLS_TPOFF
,
2967 output_section
, object
,
2968 data_shndx
, reloc
.get_r_offset(),
2969 reloc
.get_r_addend());
2973 unsupported_reloc_global(object
, r_type
, gsym
);
2985 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
2986 object
->name().c_str(), r_type
,
2987 gsym
->demangled_name().c_str());
2993 // Report an unsupported relocation against a global symbol.
2997 Target_s390
<size
>::Scan::unsupported_reloc_global(
2998 Sized_relobj_file
<size
, true>* object
,
2999 unsigned int r_type
,
3002 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
3003 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
3006 // Returns true if this relocation type could be that of a function pointer.
3009 Target_s390
<size
>::Scan::possible_function_pointer_reloc(unsigned int r_type
)
3013 case elfcpp::R_390_32
:
3014 case elfcpp::R_390_64
:
3015 case elfcpp::R_390_PC32DBL
: // could be used by larl insn
3016 case elfcpp::R_390_GOT12
:
3017 case elfcpp::R_390_GOT16
:
3018 case elfcpp::R_390_GOT20
:
3019 case elfcpp::R_390_GOT32
:
3020 case elfcpp::R_390_GOT64
:
3021 case elfcpp::R_390_GOTENT
:
3022 case elfcpp::R_390_GOTOFF16
:
3023 case elfcpp::R_390_GOTOFF32
:
3024 case elfcpp::R_390_GOTOFF64
:
3030 // For safe ICF, scan a relocation for a local symbol to check if it
3031 // corresponds to a function pointer being taken. In that case mark
3032 // the function whose pointer was taken as not foldable.
3036 Target_s390
<size
>::Scan::local_reloc_may_be_function_pointer(
3039 Target_s390
<size
>* ,
3040 Sized_relobj_file
<size
, true>* ,
3043 const elfcpp::Rela
<size
, true>& ,
3044 unsigned int r_type
,
3045 const elfcpp::Sym
<size
, true>&)
3047 // When building a shared library, do not fold any local symbols.
3048 return (parameters
->options().shared()
3049 || possible_function_pointer_reloc(r_type
));
3052 // For safe ICF, scan a relocation for a global symbol to check if it
3053 // corresponds to a function pointer being taken. In that case mark
3054 // the function whose pointer was taken as not foldable.
3058 Target_s390
<size
>::Scan::global_reloc_may_be_function_pointer(
3061 Target_s390
<size
>* ,
3062 Sized_relobj_file
<size
, true>* ,
3065 const elfcpp::Rela
<size
, true>& ,
3066 unsigned int r_type
,
3069 // When building a shared library, do not fold symbols whose visibility
3070 // is hidden, internal or protected.
3071 return ((parameters
->options().shared()
3072 && (gsym
->visibility() == elfcpp::STV_INTERNAL
3073 || gsym
->visibility() == elfcpp::STV_PROTECTED
3074 || gsym
->visibility() == elfcpp::STV_HIDDEN
))
3075 || possible_function_pointer_reloc(r_type
));
3080 Target_s390
<size
>::gc_process_relocs(Symbol_table
* symtab
,
3082 Sized_relobj_file
<size
, true>* object
,
3083 unsigned int data_shndx
,
3084 unsigned int sh_type
,
3085 const unsigned char* prelocs
,
3087 Output_section
* output_section
,
3088 bool needs_special_offset_handling
,
3089 size_t local_symbol_count
,
3090 const unsigned char* plocal_symbols
)
3093 if (sh_type
== elfcpp::SHT_REL
)
3096 gold::gc_process_relocs
<size
, true, Target_s390
<size
>, elfcpp::SHT_RELA
,
3097 typename Target_s390
<size
>::Scan
,
3098 typename Target_s390
<size
>::Relocatable_size_for_reloc
>(
3107 needs_special_offset_handling
,
3112 // Perform a relocation.
3116 Target_s390
<size
>::Relocate::relocate(
3117 const Relocate_info
<size
, true>* relinfo
,
3118 Target_s390
<size
>* target
,
3121 const elfcpp::Rela
<size
, true>& rela
,
3122 unsigned int r_type
,
3123 const Sized_symbol
<size
>* gsym
,
3124 const Symbol_value
<size
>* psymval
,
3125 unsigned char* view
,
3126 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
3127 section_size_type view_size
)
3132 const Sized_relobj_file
<size
, true>* object
= relinfo
->object
;
3134 // Pick the value to use for symbols defined in the PLT.
3135 Symbol_value
<size
> symval
;
3137 && gsym
->use_plt_offset(Scan::get_reference_flags(r_type
)))
3139 symval
.set_output_value(target
->plt_address_for_global(gsym
));
3142 else if (gsym
== NULL
&& psymval
->is_ifunc_symbol())
3144 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3145 if (object
->local_has_plt_offset(r_sym
))
3147 symval
.set_output_value(target
->plt_address_for_local(object
, r_sym
));
3152 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
3154 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
= 0;
3158 case elfcpp::R_390_PLT64
:
3159 case elfcpp::R_390_PLT32
:
3160 case elfcpp::R_390_PLT32DBL
:
3161 case elfcpp::R_390_PLT24DBL
:
3162 case elfcpp::R_390_PLT16DBL
:
3163 case elfcpp::R_390_PLT12DBL
:
3164 gold_assert(gsym
== NULL
3165 || gsym
->has_plt_offset()
3166 || gsym
->final_value_is_known()
3167 || (gsym
->is_defined()
3168 && !gsym
->is_from_dynobj()
3169 && !gsym
->is_preemptible()));
3171 case elfcpp::R_390_8
:
3172 case elfcpp::R_390_12
:
3173 case elfcpp::R_390_16
:
3174 case elfcpp::R_390_20
:
3175 case elfcpp::R_390_32
:
3176 case elfcpp::R_390_64
:
3177 case elfcpp::R_390_PC16
:
3178 case elfcpp::R_390_PC32
:
3179 case elfcpp::R_390_PC64
:
3180 case elfcpp::R_390_PC32DBL
:
3181 case elfcpp::R_390_PC24DBL
:
3182 case elfcpp::R_390_PC16DBL
:
3183 case elfcpp::R_390_PC12DBL
:
3184 value
= psymval
->value(object
, addend
);
3187 case elfcpp::R_390_GOTPC
:
3188 case elfcpp::R_390_GOTPCDBL
:
3189 gold_assert(gsym
!= NULL
);
3190 value
= target
->got_address() + addend
;
3193 case elfcpp::R_390_PLTOFF64
:
3194 case elfcpp::R_390_PLTOFF32
:
3195 case elfcpp::R_390_PLTOFF16
:
3196 gold_assert(gsym
== NULL
3197 || gsym
->has_plt_offset()
3198 || gsym
->final_value_is_known());
3200 case elfcpp::R_390_GOTOFF64
:
3201 case elfcpp::R_390_GOTOFF32
:
3202 case elfcpp::R_390_GOTOFF16
:
3203 value
= (psymval
->value(object
, addend
)
3204 - target
->got_address());
3207 case elfcpp::R_390_GOT12
:
3208 case elfcpp::R_390_GOT16
:
3209 case elfcpp::R_390_GOT20
:
3210 case elfcpp::R_390_GOT32
:
3211 case elfcpp::R_390_GOT64
:
3212 case elfcpp::R_390_GOTENT
:
3213 case elfcpp::R_390_GOTPLT12
:
3214 case elfcpp::R_390_GOTPLT16
:
3215 case elfcpp::R_390_GOTPLT20
:
3216 case elfcpp::R_390_GOTPLT32
:
3217 case elfcpp::R_390_GOTPLT64
:
3218 case elfcpp::R_390_GOTPLTENT
:
3220 unsigned int got_offset
= 0;
3223 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
3224 got_offset
= gsym
->got_offset(GOT_TYPE_STANDARD
);
3228 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3229 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
3230 got_offset
= object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
);
3232 value
= got_offset
+ target
->got_main_offset() + addend
;
3236 // These are initial tls relocs, which are expected when linking
3237 case elfcpp::R_390_TLS_LOAD
:
3238 case elfcpp::R_390_TLS_GDCALL
: // Global-dynamic
3239 case elfcpp::R_390_TLS_GD32
:
3240 case elfcpp::R_390_TLS_GD64
:
3241 case elfcpp::R_390_TLS_LDCALL
: // Local-dynamic
3242 case elfcpp::R_390_TLS_LDM32
:
3243 case elfcpp::R_390_TLS_LDM64
:
3244 case elfcpp::R_390_TLS_LDO32
:
3245 case elfcpp::R_390_TLS_LDO64
:
3246 case elfcpp::R_390_TLS_GOTIE12
: // Initial-exec
3247 case elfcpp::R_390_TLS_GOTIE20
:
3248 case elfcpp::R_390_TLS_GOTIE32
:
3249 case elfcpp::R_390_TLS_GOTIE64
:
3250 case elfcpp::R_390_TLS_IE32
:
3251 case elfcpp::R_390_TLS_IE64
:
3252 case elfcpp::R_390_TLS_IEENT
:
3253 case elfcpp::R_390_TLS_LE32
: // Local-exec
3254 case elfcpp::R_390_TLS_LE64
:
3255 value
= this->relocate_tls(relinfo
, target
, relnum
, rela
, r_type
, gsym
, psymval
,
3263 typename S390_relocate_functions
<size
>::Status status
3264 = S390_relocate_functions
<size
>::STATUS_OK
;
3268 case elfcpp::R_390_NONE
:
3269 case elfcpp::R_390_GNU_VTINHERIT
:
3270 case elfcpp::R_390_GNU_VTENTRY
:
3271 case elfcpp::R_390_TLS_GDCALL
:
3272 case elfcpp::R_390_TLS_LDCALL
:
3273 case elfcpp::R_390_TLS_LOAD
:
3276 case elfcpp::R_390_64
:
3277 case elfcpp::R_390_GOT64
:
3278 case elfcpp::R_390_GOTPLT64
:
3279 case elfcpp::R_390_PLTOFF64
:
3280 case elfcpp::R_390_GOTOFF64
:
3281 case elfcpp::R_390_TLS_GD64
:
3282 case elfcpp::R_390_TLS_LDM64
:
3283 case elfcpp::R_390_TLS_LDO64
:
3284 case elfcpp::R_390_TLS_GOTIE64
:
3285 case elfcpp::R_390_TLS_IE64
:
3286 case elfcpp::R_390_TLS_LE64
:
3287 Relocate_functions
<size
, true>::rela64(view
, value
, 0);
3290 case elfcpp::R_390_32
:
3291 case elfcpp::R_390_GOT32
:
3292 case elfcpp::R_390_GOTPLT32
:
3293 case elfcpp::R_390_PLTOFF32
:
3294 case elfcpp::R_390_GOTOFF32
:
3295 case elfcpp::R_390_TLS_GD32
:
3296 case elfcpp::R_390_TLS_LDM32
:
3297 case elfcpp::R_390_TLS_LDO32
:
3298 case elfcpp::R_390_TLS_GOTIE32
:
3299 case elfcpp::R_390_TLS_IE32
:
3300 case elfcpp::R_390_TLS_LE32
:
3301 Relocate_functions
<size
, true>::rela32(view
, value
, 0);
3304 case elfcpp::R_390_20
:
3305 case elfcpp::R_390_GOT20
:
3306 case elfcpp::R_390_GOTPLT20
:
3307 case elfcpp::R_390_TLS_GOTIE20
:
3308 status
= S390_relocate_functions
<size
>::rela20(view
, value
);
3311 case elfcpp::R_390_16
:
3312 case elfcpp::R_390_GOT16
:
3313 case elfcpp::R_390_GOTPLT16
:
3314 case elfcpp::R_390_PLTOFF16
:
3315 case elfcpp::R_390_GOTOFF16
:
3316 status
= S390_relocate_functions
<size
>::rela16(view
, value
);
3319 case elfcpp::R_390_12
:
3320 case elfcpp::R_390_GOT12
:
3321 case elfcpp::R_390_GOTPLT12
:
3322 case elfcpp::R_390_TLS_GOTIE12
:
3323 status
= S390_relocate_functions
<size
>::rela12(view
, value
);
3326 case elfcpp::R_390_8
:
3327 Relocate_functions
<size
, true>::rela8(view
, value
, 0);
3330 case elfcpp::R_390_PC16
:
3331 Relocate_functions
<size
, true>::pcrela16(view
, value
, 0,
3335 case elfcpp::R_390_PLT64
:
3336 case elfcpp::R_390_PC64
:
3337 Relocate_functions
<size
, true>::pcrela64(view
, value
, 0, address
);
3340 case elfcpp::R_390_PLT32
:
3341 case elfcpp::R_390_PC32
:
3342 case elfcpp::R_390_GOTPC
:
3343 Relocate_functions
<size
, true>::pcrela32(view
, value
, 0, address
);
3346 case elfcpp::R_390_PLT32DBL
:
3347 case elfcpp::R_390_PC32DBL
:
3348 case elfcpp::R_390_GOTPCDBL
:
3349 status
= S390_relocate_functions
<size
>::pcrela32dbl(view
, value
, address
);
3352 case elfcpp::R_390_PLT24DBL
:
3353 case elfcpp::R_390_PC24DBL
:
3354 status
= S390_relocate_functions
<size
>::pcrela24dbl(view
, value
, address
);
3357 case elfcpp::R_390_PLT16DBL
:
3358 case elfcpp::R_390_PC16DBL
:
3359 status
= S390_relocate_functions
<size
>::pcrela16dbl(view
, value
, address
);
3362 case elfcpp::R_390_PLT12DBL
:
3363 case elfcpp::R_390_PC12DBL
:
3364 status
= S390_relocate_functions
<size
>::pcrela12dbl(view
, value
, address
);
3367 case elfcpp::R_390_GOTENT
:
3368 case elfcpp::R_390_GOTPLTENT
:
3369 case elfcpp::R_390_TLS_IEENT
:
3370 value
+= target
->got_address();
3371 status
= S390_relocate_functions
<size
>::pcrela32dbl(view
, value
, address
);
3374 case elfcpp::R_390_COPY
:
3375 case elfcpp::R_390_GLOB_DAT
:
3376 case elfcpp::R_390_JMP_SLOT
:
3377 case elfcpp::R_390_RELATIVE
:
3378 case elfcpp::R_390_IRELATIVE
:
3379 // These are outstanding tls relocs, which are unexpected when linking
3380 case elfcpp::R_390_TLS_TPOFF
:
3381 case elfcpp::R_390_TLS_DTPMOD
:
3382 case elfcpp::R_390_TLS_DTPOFF
:
3383 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3384 _("unexpected reloc %u in object file"),
3389 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3390 _("unsupported reloc %u"),
3395 if (status
!= S390_relocate_functions
<size
>::STATUS_OK
)
3397 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3398 _("relocation overflow"));
3404 // Perform a TLS relocation.
3407 inline typename
elfcpp::Elf_types
<size
>::Elf_Addr
3408 Target_s390
<size
>::Relocate::relocate_tls(
3409 const Relocate_info
<size
, true>* relinfo
,
3410 Target_s390
<size
>* target
,
3412 const elfcpp::Rela
<size
, true>& rela
,
3413 unsigned int r_type
,
3414 const Sized_symbol
<size
>* gsym
,
3415 const Symbol_value
<size
>* psymval
,
3416 unsigned char* view
,
3417 section_size_type view_size
)
3419 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
3421 const Sized_relobj_file
<size
, true>* object
= relinfo
->object
;
3422 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
3423 elfcpp::Shdr
<size
, true> data_shdr(relinfo
->data_shdr
);
3424 bool is_allocatable
= (data_shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0;
3426 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
3427 = psymval
->value(relinfo
->object
, addend
);
3429 const bool is_final
= (gsym
== NULL
3430 ? !parameters
->options().shared()
3431 : gsym
->final_value_is_known());
3432 tls::Tls_optimization optimized_type
3433 = Target_s390
<size
>::optimize_tls_reloc(is_final
, r_type
);
3436 case elfcpp::R_390_TLS_GDCALL
: // Global-dynamic marker
3437 if (optimized_type
== tls::TLSOPT_TO_LE
)
3439 if (tls_segment
== NULL
)
3441 gold_assert(parameters
->errors()->error_count() > 0
3442 || issue_undefined_symbol_error(gsym
));
3445 this->tls_gd_to_le(relinfo
, relnum
, rela
, view
, view_size
);
3450 if (optimized_type
== tls::TLSOPT_TO_IE
)
3452 this->tls_gd_to_ie(relinfo
, relnum
, rela
, view
, view_size
);
3455 else if (optimized_type
== tls::TLSOPT_NONE
)
3460 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3461 _("unsupported reloc %u"), r_type
);
3464 case elfcpp::R_390_TLS_GD32
: // Global-dynamic
3465 case elfcpp::R_390_TLS_GD64
:
3466 if (optimized_type
== tls::TLSOPT_TO_LE
)
3468 if (tls_segment
== NULL
)
3470 gold_assert(parameters
->errors()->error_count() > 0
3471 || issue_undefined_symbol_error(gsym
));
3474 return value
- tls_segment
->memsz();
3478 unsigned int got_type
= (optimized_type
== tls::TLSOPT_TO_IE
3479 ? GOT_TYPE_TLS_OFFSET
3480 : GOT_TYPE_TLS_PAIR
);
3483 gold_assert(gsym
->has_got_offset(got_type
));
3484 return (gsym
->got_offset(got_type
)
3485 + target
->got_main_offset()
3490 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3491 gold_assert(object
->local_has_got_offset(r_sym
, got_type
));
3492 return (object
->local_got_offset(r_sym
, got_type
)
3493 + target
->got_main_offset()
3497 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3498 _("unsupported reloc %u"), r_type
);
3501 case elfcpp::R_390_TLS_LDCALL
: // Local-dynamic marker
3502 // This is a marker relocation. If the sequence is being turned to LE,
3503 // we modify the instruction, otherwise the instruction is untouched.
3504 if (optimized_type
== tls::TLSOPT_TO_LE
)
3506 if (tls_segment
== NULL
)
3508 gold_assert(parameters
->errors()->error_count() > 0
3509 || issue_undefined_symbol_error(gsym
));
3512 this->tls_ld_to_le(relinfo
, relnum
, rela
, view
, view_size
);
3515 else if (optimized_type
== tls::TLSOPT_NONE
)
3519 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3520 _("unsupported reloc %u"), r_type
);
3523 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic module
3524 case elfcpp::R_390_TLS_LDM64
:
3525 if (optimized_type
== tls::TLSOPT_TO_LE
)
3527 if (tls_segment
== NULL
)
3529 gold_assert(parameters
->errors()->error_count() > 0
3530 || issue_undefined_symbol_error(gsym
));
3533 // Doesn't matter what we fill it with - it's going to be unused.
3536 else if (optimized_type
== tls::TLSOPT_NONE
)
3538 // Relocate the field with the offset of the GOT entry for
3539 // the module index.
3540 return (target
->got_mod_index_entry(NULL
, NULL
, NULL
)
3542 + target
->got_main_offset());
3544 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3545 _("unsupported reloc %u"), r_type
);
3548 case elfcpp::R_390_TLS_LDO32
: // Local-dynamic offset
3549 case elfcpp::R_390_TLS_LDO64
:
3550 // This relocation type is used in debugging information.
3551 // In that case we need to not optimize the value. If the
3552 // section is not allocatable, then we assume we should not
3553 // optimize this reloc.
3554 if (optimized_type
== tls::TLSOPT_TO_LE
&& is_allocatable
)
3556 if (tls_segment
== NULL
)
3558 gold_assert(parameters
->errors()->error_count() > 0
3559 || issue_undefined_symbol_error(gsym
));
3562 value
-= tls_segment
->memsz();
3566 case elfcpp::R_390_TLS_LOAD
: // Initial-exec marker
3567 // This is a marker relocation. If the sequence is being turned to LE,
3568 // we modify the instruction, otherwise the instruction is untouched.
3570 && gsym
->is_undefined()
3571 && parameters
->options().output_is_executable())
3573 Target_s390
<size
>::Relocate::tls_ie_to_le(relinfo
, relnum
,
3578 else if (optimized_type
== tls::TLSOPT_TO_LE
)
3580 if (tls_segment
== NULL
)
3582 gold_assert(parameters
->errors()->error_count() > 0
3583 || issue_undefined_symbol_error(gsym
));
3586 Target_s390
<size
>::Relocate::tls_ie_to_le(relinfo
, relnum
,
3591 else if (optimized_type
== tls::TLSOPT_NONE
)
3595 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3596 _("unsupported reloc type %u"),
3600 case elfcpp::R_390_TLS_GOTIE12
: // Initial-exec, not optimizable
3601 case elfcpp::R_390_TLS_GOTIE20
:
3602 case elfcpp::R_390_TLS_IEENT
:
3603 case elfcpp::R_390_TLS_GOTIE32
: // Initial-exec, optimizable
3604 case elfcpp::R_390_TLS_GOTIE64
:
3605 case elfcpp::R_390_TLS_IE32
:
3606 case elfcpp::R_390_TLS_IE64
:
3608 && gsym
->is_undefined()
3609 && parameters
->options().output_is_executable()
3610 // These three cannot be optimized to LE, no matter what
3611 && r_type
!= elfcpp::R_390_TLS_GOTIE12
3612 && r_type
!= elfcpp::R_390_TLS_GOTIE20
3613 && r_type
!= elfcpp::R_390_TLS_IEENT
)
3617 else if (optimized_type
== tls::TLSOPT_TO_LE
)
3619 if (tls_segment
== NULL
)
3621 gold_assert(parameters
->errors()->error_count() > 0
3622 || issue_undefined_symbol_error(gsym
));
3625 return value
- tls_segment
->memsz();
3627 else if (optimized_type
== tls::TLSOPT_NONE
)
3629 // Relocate the field with the offset of the GOT entry for
3630 // the tp-relative offset of the symbol.
3631 unsigned int got_offset
;
3634 gold_assert(gsym
->has_got_offset(GOT_TYPE_TLS_OFFSET
));
3635 got_offset
= gsym
->got_offset(GOT_TYPE_TLS_OFFSET
);
3639 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
3640 gold_assert(object
->local_has_got_offset(r_sym
,
3641 GOT_TYPE_TLS_OFFSET
));
3642 got_offset
= object
->local_got_offset(r_sym
, GOT_TYPE_TLS_OFFSET
);
3644 got_offset
+= target
->got_main_offset();
3645 if (r_type
== elfcpp::R_390_TLS_IE32
3646 || r_type
== elfcpp::R_390_TLS_IE64
)
3647 return target
->got_address() + got_offset
+ addend
;
3649 return got_offset
+ addend
;
3651 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3652 _("unsupported reloc type %u"),
3656 case elfcpp::R_390_TLS_LE32
: // Local-exec
3657 case elfcpp::R_390_TLS_LE64
:
3658 if (tls_segment
== NULL
)
3660 gold_assert(parameters
->errors()->error_count() > 0
3661 || issue_undefined_symbol_error(gsym
));
3664 return value
- tls_segment
->memsz();
3669 // Do a relocation in which we convert a TLS General-Dynamic to an
3674 Target_s390
<size
>::Relocate::tls_gd_to_ie(
3675 const Relocate_info
<size
, true>* relinfo
,
3677 const elfcpp::Rela
<size
, true>& rela
,
3678 unsigned char* view
,
3679 section_size_type view_size
)
3681 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 4);
3682 if (view
[0] == 0x4d)
3684 // bas, don't care about details
3685 // Change to l %r2, 0(%r2, %r12)
3692 else if (view
[0] == 0xc0)
3694 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 6);
3695 // brasl %r14, __tls_get_offset@plt
3696 if (view
[1] == 0xe5)
3698 // Change to l/lg %r2, 0(%r2, %r12)
3699 // There was a PLT32DBL reloc at the last 4 bytes, overwrite its result.
3724 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3725 _("unsupported op for GD to IE"));
3728 // Do a relocation in which we convert a TLS General-Dynamic to a
3733 Target_s390
<size
>::Relocate::tls_gd_to_le(
3734 const Relocate_info
<size
, true>* relinfo
,
3736 const elfcpp::Rela
<size
, true>& rela
,
3737 unsigned char* view
,
3738 section_size_type view_size
)
3740 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 2);
3741 if (view
[0] == 0x0d)
3743 // basr, change to nop
3747 else if (view
[0] == 0x4d)
3749 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 4);
3750 // bas, don't care about details, change to nop
3757 else if (view
[0] == 0xc0)
3759 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 6);
3760 // brasl %r14, __tls_get_offset@plt
3761 if (view
[1] == 0xe5)
3763 // Change to nop jump. There was a PLT32DBL reloc at the last
3764 // 4 bytes, overwrite its result.
3773 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3774 _("unsupported op for GD to LE"));
3779 Target_s390
<size
>::Relocate::tls_ld_to_le(
3780 const Relocate_info
<size
, true>* relinfo
,
3782 const elfcpp::Rela
<size
, true>& rela
,
3783 unsigned char* view
,
3784 section_size_type view_size
)
3786 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 4);
3788 if (view
[0] == 0x0d)
3790 // basr, change to nop
3794 else if (view
[0] == 0x4d)
3796 // bas, don't care about details, change to nop
3803 else if (view
[0] == 0xc0)
3805 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 6);
3806 // brasl %r14, __tls_get_offset@plt
3807 if (view
[1] == 0xe5)
3809 // Change to nop jump. There was a PLT32DBL reloc at the last
3810 // 4 bytes, overwrite its result.
3819 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3820 _("unsupported op for LD to LE"));
3823 // Do a relocation in which we convert a TLS Initial-Exec to a
3828 Target_s390
<size
>::Relocate::tls_ie_to_le(
3829 const Relocate_info
<size
, true>* relinfo
,
3831 const elfcpp::Rela
<size
, true>& rela
,
3832 unsigned char* view
,
3833 section_size_type view_size
)
3835 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 4);
3837 if (view
[0] == 0x58)
3839 // l %rX, 0(%rY) or l %rX, 0(%rY, %r12)
3840 if ((view
[2] & 0x0f) != 0 || view
[3] != 0)
3842 int rx
= view
[1] >> 4 & 0xf;
3843 int ry
= view
[1] & 0xf;
3844 int rz
= view
[2] >> 4 & 0xf;
3863 view
[1] = rx
<< 4 | ry
;
3868 else if (view
[0] == 0xe3)
3870 tls::check_range(relinfo
, relnum
, rela
.get_r_offset(), view_size
, 6);
3871 // lg %rX, 0(%rY) or lg %rX, 0(%rY, %r12)
3872 if ((view
[2] & 0x0f) != 0 ||
3877 int rx
= view
[1] >> 4 & 0xf;
3878 int ry
= view
[1] & 0xf;
3879 int rz
= view
[2] >> 4 & 0xf;
3896 // to sllg %rX, $rY, 0
3898 view
[1] = rx
<< 4 | ry
;
3907 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
3908 _("unsupported op for IE to LE"));
3912 // Scan relocations for a section.
3916 Target_s390
<size
>::scan_relocs(Symbol_table
* symtab
,
3918 Sized_relobj_file
<size
, true>* object
,
3919 unsigned int data_shndx
,
3920 unsigned int sh_type
,
3921 const unsigned char* prelocs
,
3923 Output_section
* output_section
,
3924 bool needs_special_offset_handling
,
3925 size_t local_symbol_count
,
3926 const unsigned char* plocal_symbols
)
3928 if (sh_type
== elfcpp::SHT_REL
)
3930 gold_error(_("%s: unsupported REL reloc section"),
3931 object
->name().c_str());
3935 gold::scan_relocs
<size
, true, Target_s390
<size
>, elfcpp::SHT_RELA
,
3936 typename Target_s390
<size
>::Scan
>(
3945 needs_special_offset_handling
,
3950 // Finalize the sections.
3954 Target_s390
<size
>::do_finalize_sections(
3956 const Input_objects
*,
3957 Symbol_table
* symtab
)
3959 const Reloc_section
* rel_plt
= (this->plt_
== NULL
3961 : this->plt_
->rela_plt());
3962 layout
->add_target_dynamic_tags(false, this->got_plt_
, rel_plt
,
3963 this->rela_dyn_
, true, size
== 32);
3965 this->layout_
= layout
;
3967 // Emit any relocs we saved in an attempt to avoid generating COPY
3969 if (this->copy_relocs_
.any_saved_relocs())
3970 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
3972 // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of
3973 // the .got section.
3974 Symbol
* sym
= this->global_offset_table_
;
3977 uint64_t data_size
= this->got_
->current_data_size();
3978 symtab
->get_sized_symbol
<size
>(sym
)->set_symsize(data_size
);
3981 if (parameters
->doing_static_link()
3982 && (this->plt_
== NULL
|| !this->plt_
->has_irelative_section()))
3984 // If linking statically, make sure that the __rela_iplt symbols
3985 // were defined if necessary, even if we didn't create a PLT.
3986 static const Define_symbol_in_segment syms
[] =
3989 "__rela_iplt_start", // name
3990 elfcpp::PT_LOAD
, // segment_type
3991 elfcpp::PF_W
, // segment_flags_set
3992 elfcpp::PF(0), // segment_flags_clear
3995 elfcpp::STT_NOTYPE
, // type
3996 elfcpp::STB_GLOBAL
, // binding
3997 elfcpp::STV_HIDDEN
, // visibility
3999 Symbol::SEGMENT_START
, // offset_from_base
4003 "__rela_iplt_end", // name
4004 elfcpp::PT_LOAD
, // segment_type
4005 elfcpp::PF_W
, // segment_flags_set
4006 elfcpp::PF(0), // segment_flags_clear
4009 elfcpp::STT_NOTYPE
, // type
4010 elfcpp::STB_GLOBAL
, // binding
4011 elfcpp::STV_HIDDEN
, // visibility
4013 Symbol::SEGMENT_START
, // offset_from_base
4018 symtab
->define_symbols(layout
, 2, syms
,
4019 layout
->script_options()->saw_sections_clause());
4023 // Return the size of a relocation while scanning during a relocatable
4028 Target_s390
<size
>::Relocatable_size_for_reloc::get_size_for_reloc(
4029 unsigned int r_type
,
4034 case elfcpp::R_390_NONE
:
4035 case elfcpp::R_390_GNU_VTINHERIT
:
4036 case elfcpp::R_390_GNU_VTENTRY
:
4037 case elfcpp::R_390_TLS_GD32
: // Global-dynamic
4038 case elfcpp::R_390_TLS_GD64
:
4039 case elfcpp::R_390_TLS_GDCALL
:
4040 case elfcpp::R_390_TLS_LDM32
: // Local-dynamic
4041 case elfcpp::R_390_TLS_LDM64
:
4042 case elfcpp::R_390_TLS_LDO32
:
4043 case elfcpp::R_390_TLS_LDO64
:
4044 case elfcpp::R_390_TLS_LDCALL
:
4045 case elfcpp::R_390_TLS_IE32
: // Initial-exec
4046 case elfcpp::R_390_TLS_IE64
:
4047 case elfcpp::R_390_TLS_IEENT
:
4048 case elfcpp::R_390_TLS_GOTIE12
:
4049 case elfcpp::R_390_TLS_GOTIE20
:
4050 case elfcpp::R_390_TLS_GOTIE32
:
4051 case elfcpp::R_390_TLS_GOTIE64
:
4052 case elfcpp::R_390_TLS_LOAD
:
4053 case elfcpp::R_390_TLS_LE32
: // Local-exec
4054 case elfcpp::R_390_TLS_LE64
:
4057 case elfcpp::R_390_64
:
4058 case elfcpp::R_390_PC64
:
4059 case elfcpp::R_390_GOT64
:
4060 case elfcpp::R_390_PLT64
:
4061 case elfcpp::R_390_GOTOFF64
:
4062 case elfcpp::R_390_GOTPLT64
:
4063 case elfcpp::R_390_PLTOFF64
:
4066 case elfcpp::R_390_32
:
4067 case elfcpp::R_390_PC32
:
4068 case elfcpp::R_390_GOT32
:
4069 case elfcpp::R_390_PLT32
:
4070 case elfcpp::R_390_GOTOFF32
:
4071 case elfcpp::R_390_GOTPC
:
4072 case elfcpp::R_390_PC32DBL
:
4073 case elfcpp::R_390_PLT32DBL
:
4074 case elfcpp::R_390_GOTPCDBL
:
4075 case elfcpp::R_390_GOTENT
:
4076 case elfcpp::R_390_GOTPLT32
:
4077 case elfcpp::R_390_GOTPLTENT
:
4078 case elfcpp::R_390_PLTOFF32
:
4079 case elfcpp::R_390_20
:
4080 case elfcpp::R_390_GOT20
:
4081 case elfcpp::R_390_GOTPLT20
:
4084 case elfcpp::R_390_PC24DBL
:
4085 case elfcpp::R_390_PLT24DBL
:
4088 case elfcpp::R_390_12
:
4089 case elfcpp::R_390_GOT12
:
4090 case elfcpp::R_390_GOTPLT12
:
4091 case elfcpp::R_390_PC12DBL
:
4092 case elfcpp::R_390_PLT12DBL
:
4093 case elfcpp::R_390_16
:
4094 case elfcpp::R_390_GOT16
:
4095 case elfcpp::R_390_PC16
:
4096 case elfcpp::R_390_PC16DBL
:
4097 case elfcpp::R_390_PLT16DBL
:
4098 case elfcpp::R_390_GOTOFF16
:
4099 case elfcpp::R_390_GOTPLT16
:
4100 case elfcpp::R_390_PLTOFF16
:
4103 case elfcpp::R_390_8
:
4106 // These are relocations which should only be seen by the
4107 // dynamic linker, and should never be seen here.
4108 case elfcpp::R_390_COPY
:
4109 case elfcpp::R_390_GLOB_DAT
:
4110 case elfcpp::R_390_JMP_SLOT
:
4111 case elfcpp::R_390_RELATIVE
:
4112 case elfcpp::R_390_IRELATIVE
:
4113 case elfcpp::R_390_TLS_DTPMOD
:
4114 case elfcpp::R_390_TLS_DTPOFF
:
4115 case elfcpp::R_390_TLS_TPOFF
:
4116 object
->error(_("unexpected reloc %u in object file"), r_type
);
4120 object
->error(_("unsupported reloc %u in object file"), r_type
);
4125 // Scan the relocs during a relocatable link.
4129 Target_s390
<size
>::scan_relocatable_relocs(
4130 Symbol_table
* symtab
,
4132 Sized_relobj_file
<size
, true>* object
,
4133 unsigned int data_shndx
,
4134 unsigned int sh_type
,
4135 const unsigned char* prelocs
,
4137 Output_section
* output_section
,
4138 bool needs_special_offset_handling
,
4139 size_t local_symbol_count
,
4140 const unsigned char* plocal_symbols
,
4141 Relocatable_relocs
* rr
)
4143 gold_assert(sh_type
== elfcpp::SHT_RELA
);
4145 typedef gold::Default_scan_relocatable_relocs
<elfcpp::SHT_RELA
,
4146 Relocatable_size_for_reloc
> Scan_relocatable_relocs
;
4148 gold::scan_relocatable_relocs
<size
, true, elfcpp::SHT_RELA
,
4149 Scan_relocatable_relocs
>(
4157 needs_special_offset_handling
,
4163 // Relocate a section during a relocatable link.
4167 Target_s390
<size
>::relocate_relocs(
4168 const Relocate_info
<size
, true>* relinfo
,
4169 unsigned int sh_type
,
4170 const unsigned char* prelocs
,
4172 Output_section
* output_section
,
4173 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
4174 const Relocatable_relocs
* rr
,
4175 unsigned char* view
,
4176 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
4177 section_size_type view_size
,
4178 unsigned char* reloc_view
,
4179 section_size_type reloc_view_size
)
4181 gold_assert(sh_type
== elfcpp::SHT_RELA
);
4183 gold::relocate_relocs
<size
, true, elfcpp::SHT_RELA
>(
4188 offset_in_output_section
,
4197 // Return the offset to use for the GOT_INDX'th got entry which is
4198 // for a local tls symbol specified by OBJECT, SYMNDX.
4201 Target_s390
<size
>::do_tls_offset_for_local(
4206 // The only way we can get called is when IEENT/GOTIE12/GOTIE20
4207 // couldn't be optimised to LE.
4208 Output_segment
* tls_segment
= layout_
->tls_segment();
4209 return -tls_segment
->memsz();
4212 // Return the offset to use for the GOT_INDX'th got entry which is
4213 // for global tls symbol GSYM.
4216 Target_s390
<size
>::do_tls_offset_for_global(
4220 Output_segment
* tls_segment
= layout_
->tls_segment();
4221 return -tls_segment
->memsz();
4224 // Return the value to use for a dynamic which requires special
4225 // treatment. This is how we support equality comparisons of function
4226 // pointers across shared library boundaries, as described in the
4227 // processor specific ABI supplement.
4231 Target_s390
<size
>::do_dynsym_value(const Symbol
* gsym
) const
4233 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
4234 return this->plt_address_for_global(gsym
);
4237 // Return a string used to fill a code section with nops to take up
4238 // the specified length.
4242 Target_s390
<size
>::do_code_fill(section_size_type length
) const
4245 gold_warning(_("S/390 code fill of odd length requested"));
4246 return std::string(length
, static_cast<char>(0x07));
4249 // Relocate section data.
4253 Target_s390
<size
>::relocate_section(
4254 const Relocate_info
<size
, true>* relinfo
,
4255 unsigned int sh_type
,
4256 const unsigned char* prelocs
,
4258 Output_section
* output_section
,
4259 bool needs_special_offset_handling
,
4260 unsigned char* view
,
4261 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
4262 section_size_type view_size
,
4263 const Reloc_symbol_changes
* reloc_symbol_changes
)
4265 gold_assert(sh_type
== elfcpp::SHT_RELA
);
4267 gold::relocate_section
<size
, true, Target_s390
<size
>, elfcpp::SHT_RELA
,
4268 typename Target_s390
<size
>::Relocate
,
4269 gold::Default_comdat_behavior
>(
4275 needs_special_offset_handling
,
4279 reloc_symbol_changes
);
4282 // Apply an incremental relocation. Incremental relocations always refer
4283 // to global symbols.
4287 Target_s390
<size
>::apply_relocation(
4288 const Relocate_info
<size
, true>* relinfo
,
4289 typename
elfcpp::Elf_types
<size
>::Elf_Addr r_offset
,
4290 unsigned int r_type
,
4291 typename
elfcpp::Elf_types
<size
>::Elf_Swxword r_addend
,
4293 unsigned char* view
,
4294 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
4295 section_size_type view_size
)
4297 gold::apply_relocation
<size
, true, Target_s390
<size
>,
4298 typename Target_s390
<size
>::Relocate
>(
4310 // The selector for s390 object files.
4313 class Target_selector_s390
: public Target_selector
4316 Target_selector_s390()
4317 : Target_selector(elfcpp::EM_S390
, size
, true,
4318 (size
== 64 ? "elf64-s390" : "elf32-s390"),
4319 (size
== 64 ? "elf64_s390" : "elf32_s390"))
4323 do_instantiate_target()
4324 { return new Target_s390
<size
>(); }
4327 Target_selector_s390
<32> target_selector_s390
;
4328 Target_selector_s390
<64> target_selector_s390x
;
4330 } // End anonymous namespace.