1 // aarch64.cc -- aarch64 target support for gold.
3 // Copyright (C) 2014 Free Software Foundation, Inc.
4 // Written by Jing Yu <jingyu@google.com> and Han Shen <shenhan@google.com>.
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"
45 #include "aarch64-reloc-property.h"
47 // The first three .got.plt entries are reserved.
48 const int32_t AARCH64_GOTPLT_RESERVE_COUNT
= 3;
56 template<int size
, bool big_endian
>
57 class Output_data_plt_aarch64
;
59 template<int size
, bool big_endian
>
60 class Output_data_plt_aarch64_standard
;
62 template<int size
, bool big_endian
>
65 template<int size
, bool big_endian
>
66 class AArch64_relocate_functions
;
68 // Output_data_got_aarch64 class.
70 template<int size
, bool big_endian
>
71 class Output_data_got_aarch64
: public Output_data_got
<size
, big_endian
>
74 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Valtype
;
75 Output_data_got_aarch64(Symbol_table
* symtab
, Layout
* layout
)
76 : Output_data_got
<size
, big_endian
>(),
77 symbol_table_(symtab
), layout_(layout
)
80 // Add a static entry for the GOT entry at OFFSET. GSYM is a global
81 // symbol and R_TYPE is the code of a dynamic relocation that needs to be
82 // applied in a static link.
84 add_static_reloc(unsigned int got_offset
, unsigned int r_type
, Symbol
* gsym
)
85 { this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, gsym
)); }
88 // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object
89 // defining a local symbol with INDEX. R_TYPE is the code of a dynamic
90 // relocation that needs to be applied in a static link.
92 add_static_reloc(unsigned int got_offset
, unsigned int r_type
,
93 Sized_relobj_file
<size
, big_endian
>* relobj
,
96 this->static_relocs_
.push_back(Static_reloc(got_offset
, r_type
, relobj
,
102 // Write out the GOT table.
104 do_write(Output_file
* of
) {
105 // The first entry in the GOT is the address of the .dynamic section.
106 gold_assert(this->data_size() >= size
/ 8);
107 Output_section
* dynamic
= this->layout_
->dynamic_section();
108 Valtype dynamic_addr
= dynamic
== NULL
? 0 : dynamic
->address();
109 this->replace_constant(0, dynamic_addr
);
110 Output_data_got
<size
, big_endian
>::do_write(of
);
112 // Handling static relocs
113 if (this->static_relocs_
.empty())
116 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
118 gold_assert(parameters
->doing_static_link());
119 const off_t offset
= this->offset();
120 const section_size_type oview_size
=
121 convert_to_section_size_type(this->data_size());
122 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
124 Output_segment
* tls_segment
= this->layout_
->tls_segment();
125 gold_assert(tls_segment
!= NULL
);
127 AArch64_address aligned_tcb_address
=
128 align_address(Target_aarch64
<size
, big_endian
>::TCB_SIZE
,
129 tls_segment
->maximum_alignment());
131 for (size_t i
= 0; i
< this->static_relocs_
.size(); ++i
)
133 Static_reloc
& reloc(this->static_relocs_
[i
]);
134 AArch64_address value
;
136 if (!reloc
.symbol_is_global())
138 Sized_relobj_file
<size
, big_endian
>* object
= reloc
.relobj();
139 const Symbol_value
<size
>* psymval
=
140 reloc
.relobj()->local_symbol(reloc
.index());
142 // We are doing static linking. Issue an error and skip this
143 // relocation if the symbol is undefined or in a discarded_section.
145 unsigned int shndx
= psymval
->input_shndx(&is_ordinary
);
146 if ((shndx
== elfcpp::SHN_UNDEF
)
148 && shndx
!= elfcpp::SHN_UNDEF
149 && !object
->is_section_included(shndx
)
150 && !this->symbol_table_
->is_section_folded(object
, shndx
)))
152 gold_error(_("undefined or discarded local symbol %u from "
153 " object %s in GOT"),
154 reloc
.index(), reloc
.relobj()->name().c_str());
157 value
= psymval
->value(object
, 0);
161 const Symbol
* gsym
= reloc
.symbol();
162 gold_assert(gsym
!= NULL
);
163 if (gsym
->is_forwarder())
164 gsym
= this->symbol_table_
->resolve_forwards(gsym
);
166 // We are doing static linking. Issue an error and skip this
167 // relocation if the symbol is undefined or in a discarded_section
168 // unless it is a weakly_undefined symbol.
169 if ((gsym
->is_defined_in_discarded_section()
170 || gsym
->is_undefined())
171 && !gsym
->is_weak_undefined())
173 gold_error(_("undefined or discarded symbol %s in GOT"),
178 if (!gsym
->is_weak_undefined())
180 const Sized_symbol
<size
>* sym
=
181 static_cast<const Sized_symbol
<size
>*>(gsym
);
182 value
= sym
->value();
188 unsigned got_offset
= reloc
.got_offset();
189 gold_assert(got_offset
< oview_size
);
191 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
192 Valtype
* wv
= reinterpret_cast<Valtype
*>(oview
+ got_offset
);
194 switch (reloc
.r_type())
196 case elfcpp::R_AARCH64_TLS_DTPREL64
:
199 case elfcpp::R_AARCH64_TLS_TPREL64
:
200 x
= value
+ aligned_tcb_address
;
205 elfcpp::Swap
<size
, big_endian
>::writeval(wv
, x
);
208 of
->write_output_view(offset
, oview_size
, oview
);
212 // Symbol table of the output object.
213 Symbol_table
* symbol_table_
;
214 // A pointer to the Layout class, so that we can find the .dynamic
215 // section when we write out the GOT section.
218 // This class represent dynamic relocations that need to be applied by
219 // gold because we are using TLS relocations in a static link.
223 Static_reloc(unsigned int got_offset
, unsigned int r_type
, Symbol
* gsym
)
224 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(true)
225 { this->u_
.global
.symbol
= gsym
; }
227 Static_reloc(unsigned int got_offset
, unsigned int r_type
,
228 Sized_relobj_file
<size
, big_endian
>* relobj
, unsigned int index
)
229 : got_offset_(got_offset
), r_type_(r_type
), symbol_is_global_(false)
231 this->u_
.local
.relobj
= relobj
;
232 this->u_
.local
.index
= index
;
235 // Return the GOT offset.
238 { return this->got_offset_
; }
243 { return this->r_type_
; }
245 // Whether the symbol is global or not.
247 symbol_is_global() const
248 { return this->symbol_is_global_
; }
250 // For a relocation against a global symbol, the global symbol.
254 gold_assert(this->symbol_is_global_
);
255 return this->u_
.global
.symbol
;
258 // For a relocation against a local symbol, the defining object.
259 Sized_relobj_file
<size
, big_endian
>*
262 gold_assert(!this->symbol_is_global_
);
263 return this->u_
.local
.relobj
;
266 // For a relocation against a local symbol, the local symbol index.
270 gold_assert(!this->symbol_is_global_
);
271 return this->u_
.local
.index
;
275 // GOT offset of the entry to which this relocation is applied.
276 unsigned int got_offset_
;
277 // Type of relocation.
278 unsigned int r_type_
;
279 // Whether this relocation is against a global symbol.
280 bool symbol_is_global_
;
281 // A global or local symbol.
286 // For a global symbol, the symbol itself.
291 // For a local symbol, the object defining the symbol.
292 Sized_relobj_file
<size
, big_endian
>* relobj
;
293 // For a local symbol, the symbol index.
297 }; // End of inner class Static_reloc
299 std::vector
<Static_reloc
> static_relocs_
;
300 }; // End of Output_data_got_aarch64
303 template<int size
, bool big_endian
>
304 class AArch64_input_section
;
307 template<int size
, bool big_endian
>
308 class AArch64_output_section
;
313 template<int size
, bool big_endian
>
317 typedef Reloc_stub
<size
, big_endian
> This
;
318 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
320 // Do not change the value of the enums, they are used to index into
326 // Using adrp/add pair, 4 insns (including alignment) without mem access,
327 // the fastest stub. This has a limited jump distance, which is tested by
328 // aarch64_valid_for_adrp_p.
331 // Using ldr-absolute-address/br-register, 4 insns with 1 mem access,
332 // unlimited in jump distance.
333 ST_LONG_BRANCH_ABS
= 2,
335 // Using ldr/calculate-pcrel/jump, 8 insns (including alignment) with 1 mem
336 // access, slowest one. Only used in position independent executables.
337 ST_LONG_BRANCH_PCREL
= 3,
341 // Branch range. This is used to calculate the section group size, as well as
342 // determine whether a stub is needed.
343 static const int MAX_BRANCH_OFFSET
= ((1 << 25) - 1) << 2;
344 static const int MIN_BRANCH_OFFSET
= -((1 << 25) << 2);
346 // Constant used to determine if an offset fits in the adrp instruction
348 static const int MAX_ADRP_IMM
= (1 << 20) - 1;
349 static const int MIN_ADRP_IMM
= -(1 << 20);
351 static const int BYTES_PER_INSN
= 4;
352 static const int STUB_ADDR_ALIGN
= 4;
354 // Determine whether the offset fits in the jump/branch instruction.
356 aarch64_valid_branch_offset_p(int64_t offset
)
357 { return offset
>= MIN_BRANCH_OFFSET
&& offset
<= MAX_BRANCH_OFFSET
; }
359 // Determine whether the offset fits in the adrp immediate field.
361 aarch64_valid_for_adrp_p(AArch64_address location
, AArch64_address dest
)
363 typedef AArch64_relocate_functions
<size
, big_endian
> Reloc
;
364 int64_t adrp_imm
= (Reloc::Page(dest
) - Reloc::Page(location
)) >> 12;
365 return adrp_imm
>= MIN_ADRP_IMM
&& adrp_imm
<= MAX_ADRP_IMM
;
368 // Determine the stub type for a certain relocation or ST_NONE, if no stub is
371 stub_type_for_reloc(unsigned int r_type
, AArch64_address address
,
372 AArch64_address target
);
374 Reloc_stub(Stub_type stub_type
)
375 : stub_type_(stub_type
), offset_(invalid_offset
),
376 destination_address_(invalid_address
)
382 // Return offset of code stub from beginning of its containing stub table.
386 gold_assert(this->offset_
!= invalid_offset
);
387 return this->offset_
;
390 // Set offset of code stub from beginning of its containing stub table.
392 set_offset(section_offset_type offset
)
393 { this->offset_
= offset
; }
395 // Return destination address.
397 destination_address() const
399 gold_assert(this->destination_address_
!= this->invalid_address
);
400 return this->destination_address_
;
403 // Set destination address.
405 set_destination_address(AArch64_address address
)
407 gold_assert(address
!= this->invalid_address
);
408 this->destination_address_
= address
;
411 // Reset the destination address.
413 reset_destination_address()
414 { this->destination_address_
= this->invalid_address
; }
416 // Return the stub type.
419 { return stub_type_
; }
421 // Return the stub size.
424 { return this->stub_insn_number() * BYTES_PER_INSN
; }
426 // Return the instruction number of this stub instance.
428 stub_insn_number() const
429 { return stub_insns_
[this->stub_type_
][0]; }
431 // Note the first "insn" is the number of total insns in this array.
434 { return stub_insns_
[this->stub_type_
]; }
436 // Write stub to output file.
438 write(unsigned char* view
, section_size_type view_size
)
439 { this->do_write(view
, view_size
); }
441 // The key class used to index the stub instance in the stub table's stub map.
445 Key(Stub_type stub_type
, const Symbol
* symbol
, const Relobj
* relobj
,
446 unsigned int r_sym
, int32_t addend
)
447 : stub_type_(stub_type
), addend_(addend
)
451 this->r_sym_
= Reloc_stub::invalid_index
;
452 this->u_
.symbol
= symbol
;
456 gold_assert(relobj
!= NULL
&& r_sym
!= invalid_index
);
457 this->r_sym_
= r_sym
;
458 this->u_
.relobj
= relobj
;
468 { return this->stub_type_
; }
470 // Return the local symbol index or invalid_index.
473 { return this->r_sym_
; }
475 // Return the symbol if there is one.
478 { return this->r_sym_
== invalid_index
? this->u_
.symbol
: NULL
; }
480 // Return the relobj if there is one.
483 { return this->r_sym_
!= invalid_index
? this->u_
.relobj
: NULL
; }
485 // Whether this equals to another key k.
487 eq(const Key
& k
) const
489 return ((this->stub_type_
== k
.stub_type_
)
490 && (this->r_sym_
== k
.r_sym_
)
491 && ((this->r_sym_
!= Reloc_stub::invalid_index
)
492 ? (this->u_
.relobj
== k
.u_
.relobj
)
493 : (this->u_
.symbol
== k
.u_
.symbol
))
494 && (this->addend_
== k
.addend_
));
497 // Return a hash value.
501 size_t name_hash_value
= gold::string_hash
<char>(
502 (this->r_sym_
!= Reloc_stub::invalid_index
)
503 ? this->u_
.relobj
->name().c_str()
504 : this->u_
.symbol
->name());
505 // We only have 4 stub types.
506 size_t stub_type_hash_value
= 0x03 & this->stub_type_
;
507 return (name_hash_value
508 ^ stub_type_hash_value
509 ^ ((this->r_sym_
& 0x3fff) << 2)
510 ^ ((this->addend_
& 0xffff) << 16));
513 // Functors for STL associative containers.
517 operator()(const Key
& k
) const
518 { return k
.hash_value(); }
524 operator()(const Key
& k1
, const Key
& k2
) const
525 { return k1
.eq(k2
); }
530 const Stub_type stub_type_
;
531 // If this is a local symbol, this is the index in the defining object.
532 // Otherwise, it is invalid_index for a global symbol.
534 // If r_sym_ is an invalid index, this points to a global symbol.
535 // Otherwise, it points to a relobj. We used the unsized and target
536 // independent Symbol and Relobj classes instead of Sized_symbol<32> and
537 // Arm_relobj, in order to avoid making the stub class a template
538 // as most of the stub machinery is endianness-neutral. However, it
539 // may require a bit of casting done by users of this class.
542 const Symbol
* symbol
;
543 const Relobj
* relobj
;
545 // Addend associated with a reloc.
547 }; // End of inner class Reloc_stub::Key
550 // This may be overridden in the child class.
552 do_write(unsigned char*, section_size_type
);
555 static const section_offset_type invalid_offset
=
556 static_cast<section_offset_type
>(-1);
557 static const unsigned int invalid_index
= static_cast<unsigned int>(-1);
558 static const AArch64_address invalid_address
=
559 static_cast<AArch64_address
>(-1);
561 static const uint32_t stub_insns_
[][10];
563 const Stub_type stub_type_
;
564 section_offset_type offset_
;
565 AArch64_address destination_address_
;
566 }; // End of Reloc_stub
569 // Write data to output file.
571 template<int size
, bool big_endian
>
573 Reloc_stub
<size
, big_endian
>::
574 do_write(unsigned char* view
, section_size_type
)
576 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
577 const uint32_t* insns
= this->stub_insns();
578 uint32_t num_insns
= this->stub_insn_number();
579 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
580 for (uint32_t i
= 1; i
<= num_insns
; ++i
)
581 elfcpp::Swap
<32, big_endian
>::writeval(ip
+ i
- 1, insns
[i
]);
585 // Stubs instructions definition.
587 template<int size
, bool big_endian
>
589 Reloc_stub
<size
, big_endian
>::stub_insns_
[][10] =
591 // The first element of each group is the num of the insns.
599 0x90000010, /* adrp ip0, X */
600 /* ADR_PREL_PG_HI21(X) */
601 0x91000210, /* add ip0, ip0, :lo12:X */
602 /* ADD_ABS_LO12_NC(X) */
603 0xd61f0200, /* br ip0 */
604 0x00000000, /* alignment padding */
607 // ST_LONG_BRANCH_ABS
610 0x58000050, /* ldr ip0, 0x8 */
611 0xd61f0200, /* br ip0 */
612 0x00000000, /* address field */
613 0x00000000, /* address fields */
616 // ST_LONG_BRANCH_PCREL
619 0x58000090, /* ldr ip0, 0x10 */
620 0x10000011, /* adr ip1, #0 */
621 0x8b110210, /* add ip0, ip0, ip1 */
622 0xd61f0200, /* br ip0 */
623 0x00000000, /* address field */
624 0x00000000, /* address field */
625 0x00000000, /* alignment padding */
626 0x00000000, /* alignment padding */
631 // Determine the stub type for a certain relocation or ST_NONE, if no stub is
634 template<int size
, bool big_endian
>
636 typename Reloc_stub
<size
, big_endian
>::Stub_type
637 Reloc_stub
<size
, big_endian
>::stub_type_for_reloc(
638 unsigned int r_type
, AArch64_address location
, AArch64_address dest
)
640 int64_t branch_offset
= 0;
643 case elfcpp::R_AARCH64_CALL26
:
644 case elfcpp::R_AARCH64_JUMP26
:
645 branch_offset
= dest
- location
;
651 if (aarch64_valid_branch_offset_p(branch_offset
))
654 if (aarch64_valid_for_adrp_p(location
, dest
))
655 return ST_ADRP_BRANCH
;
657 if (parameters
->options().output_is_position_independent()
658 && parameters
->options().output_is_executable())
659 return ST_LONG_BRANCH_PCREL
;
661 return ST_LONG_BRANCH_ABS
;
664 // A class to hold stubs for the ARM target.
666 template<int size
, bool big_endian
>
667 class Stub_table
: public Output_data
670 typedef Target_aarch64
<size
, big_endian
> The_target_aarch64
;
671 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
672 typedef AArch64_input_section
<size
, big_endian
> The_aarch64_input_section
;
673 typedef Reloc_stub
<size
, big_endian
> The_reloc_stub
;
674 typedef typename
The_reloc_stub::Key The_reloc_stub_key
;
675 typedef typename
The_reloc_stub_key::hash The_reloc_stub_key_hash
;
676 typedef typename
The_reloc_stub_key::equal_to The_reloc_stub_key_equal_to
;
677 typedef Stub_table
<size
, big_endian
> The_stub_table
;
678 typedef Unordered_map
<The_reloc_stub_key
, The_reloc_stub
*,
679 The_reloc_stub_key_hash
, The_reloc_stub_key_equal_to
>
681 typedef typename
Reloc_stub_map::const_iterator Reloc_stub_map_const_iter
;
682 typedef Relocate_info
<size
, big_endian
> The_relocate_info
;
684 Stub_table(The_aarch64_input_section
* owner
)
685 : Output_data(), owner_(owner
), reloc_stubs_size_(0), prev_data_size_(0)
691 The_aarch64_input_section
*
695 // Whether this stub table is empty.
698 { return reloc_stubs_
.empty(); }
700 // Return the current data size.
702 current_data_size() const
703 { return this->current_data_size_for_child(); }
705 // Add a STUB using KEY. The caller is responsible for avoiding addition
706 // if a STUB with the same key has already been added.
708 add_reloc_stub(The_reloc_stub
* stub
, const The_reloc_stub_key
& key
);
710 // Finalize stubs. No-op here, just for completeness.
715 // Look up a relocation stub using KEY. Return NULL if there is none.
717 find_reloc_stub(The_reloc_stub_key
& key
)
719 Reloc_stub_map_const_iter p
= this->reloc_stubs_
.find(key
);
720 return (p
!= this->reloc_stubs_
.end()) ? p
->second
: NULL
;
723 // Relocate stubs in this stub table.
725 relocate_stubs(const The_relocate_info
*,
732 // Update data size at the end of a relaxation pass. Return true if data size
733 // is different from that of the previous relaxation pass.
735 update_data_size_changed_p()
737 // No addralign changed here.
738 off_t s
= this->reloc_stubs_size_
;
739 bool changed
= (s
!= this->prev_data_size_
);
740 this->prev_data_size_
= s
;
745 // Write out section contents.
747 do_write(Output_file
*);
749 // Return the required alignment.
752 { return The_reloc_stub::STUB_ADDR_ALIGN
; }
754 // Reset address and file offset.
756 do_reset_address_and_file_offset()
757 { this->set_current_data_size_for_child(this->prev_data_size_
); }
759 // Set final data size.
761 set_final_data_size()
762 { this->set_data_size(this->current_data_size()); }
765 // Relocate one stub.
767 relocate_stub(The_reloc_stub
*,
768 const The_relocate_info
*,
776 // Owner of this stub table.
777 The_aarch64_input_section
* owner_
;
778 // The relocation stubs.
779 Reloc_stub_map reloc_stubs_
;
780 // Size of reloc stubs.
781 off_t reloc_stubs_size_
;
782 // data size of this in the previous pass.
783 off_t prev_data_size_
;
784 }; // End of Stub_table
787 // Add a STUB using KEY. The caller is responsible for avoiding addition
788 // if a STUB with the same key has already been added.
790 template<int size
, bool big_endian
>
792 Stub_table
<size
, big_endian
>::add_reloc_stub(
793 The_reloc_stub
* stub
, const The_reloc_stub_key
& key
)
795 gold_assert(stub
->stub_type() == key
.stub_type());
796 this->reloc_stubs_
[key
] = stub
;
798 // Assign stub offset early. We can do this because we never remove
799 // reloc stubs and they are in the beginning of the stub table.
800 this->reloc_stubs_size_
= align_address(this->reloc_stubs_size_
,
801 The_reloc_stub::STUB_ADDR_ALIGN
);
802 stub
->set_offset(this->reloc_stubs_size_
);
803 this->reloc_stubs_size_
+= stub
->stub_size();
807 // Relocate all stubs in this stub table.
809 template<int size
, bool big_endian
>
811 Stub_table
<size
, big_endian
>::
812 relocate_stubs(const The_relocate_info
* relinfo
,
813 The_target_aarch64
* target_aarch64
,
814 Output_section
* output_section
,
816 AArch64_address address
,
817 section_size_type view_size
)
819 // "view_size" is the total size of the stub_table.
820 gold_assert(address
== this->address() &&
821 view_size
== static_cast<section_size_type
>(this->data_size()));
822 for(Reloc_stub_map_const_iter p
= this->reloc_stubs_
.begin();
823 p
!= this->reloc_stubs_
.end(); ++p
)
824 relocate_stub(p
->second
, relinfo
, target_aarch64
, output_section
,
825 view
, address
, view_size
);
829 // Relocate one stub. This is a helper for Stub_table::relocate_stubs().
831 template<int size
, bool big_endian
>
833 Stub_table
<size
, big_endian
>::
834 relocate_stub(The_reloc_stub
* stub
,
835 const The_relocate_info
* relinfo
,
836 The_target_aarch64
* target_aarch64
,
837 Output_section
* output_section
,
839 AArch64_address address
,
840 section_size_type view_size
)
842 // "offset" is the offset from the beginning of the stub_table.
843 section_size_type offset
= stub
->offset();
844 section_size_type stub_size
= stub
->stub_size();
845 // "view_size" is the total size of the stub_table.
846 gold_assert(offset
+ stub_size
<= view_size
);
848 target_aarch64
->relocate_stub(stub
, relinfo
, output_section
,
849 view
+ offset
, address
+ offset
, view_size
);
853 // Write out the stubs to file.
855 template<int size
, bool big_endian
>
857 Stub_table
<size
, big_endian
>::do_write(Output_file
* of
)
859 off_t offset
= this->offset();
860 const section_size_type oview_size
=
861 convert_to_section_size_type(this->data_size());
862 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
864 // Write relocation stubs.
865 for (typename
Reloc_stub_map::const_iterator p
= this->reloc_stubs_
.begin();
866 p
!= this->reloc_stubs_
.end(); ++p
)
868 The_reloc_stub
* stub
= p
->second
;
869 AArch64_address address
= this->address() + stub
->offset();
870 gold_assert(address
==
871 align_address(address
, The_reloc_stub::STUB_ADDR_ALIGN
));
872 stub
->write(oview
+ stub
->offset(), stub
->stub_size());
875 of
->write_output_view(this->offset(), oview_size
, oview
);
879 // AArch64_relobj class.
881 template<int size
, bool big_endian
>
882 class AArch64_relobj
: public Sized_relobj_file
<size
, big_endian
>
885 typedef AArch64_relobj
<size
, big_endian
> This
;
886 typedef Target_aarch64
<size
, big_endian
> The_target_aarch64
;
887 typedef AArch64_input_section
<size
, big_endian
> The_aarch64_input_section
;
888 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
889 typedef Stub_table
<size
, big_endian
> The_stub_table
;
890 typedef std::vector
<The_stub_table
*> Stub_table_list
;
891 static const AArch64_address invalid_address
=
892 static_cast<AArch64_address
>(-1);
894 AArch64_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
895 const typename
elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
896 : Sized_relobj_file
<size
, big_endian
>(name
, input_file
, offset
, ehdr
),
903 // Return the stub table of the SHNDX-th section if there is one.
905 stub_table(unsigned int shndx
) const
907 gold_assert(shndx
< this->stub_tables_
.size());
908 return this->stub_tables_
[shndx
];
911 // Set STUB_TABLE to be the stub_table of the SHNDX-th section.
913 set_stub_table(unsigned int shndx
, The_stub_table
* stub_table
)
915 gold_assert(shndx
< this->stub_tables_
.size());
916 this->stub_tables_
[shndx
] = stub_table
;
919 // Scan all relocation sections for stub generation.
921 scan_sections_for_stubs(The_target_aarch64
*, const Symbol_table
*,
924 // Whether a section is a scannable text section.
926 text_section_is_scannable(const elfcpp::Shdr
<size
, big_endian
>&, unsigned int,
927 const Output_section
*, const Symbol_table
*);
929 // Convert regular input section with index SHNDX to a relaxed section.
931 convert_input_section_to_relaxed_section(unsigned /* shndx */)
933 // The stubs have relocations and we need to process them after writing
934 // out the stubs. So relocation now must follow section write.
935 this->set_relocs_must_follow_section_writes();
939 // Post constructor setup.
943 // Call parent's setup method.
944 Sized_relobj_file
<size
, big_endian
>::do_setup();
946 // Initialize look-up tables.
947 this->stub_tables_
.resize(this->shnum());
951 do_relocate_sections(
952 const Symbol_table
* symtab
, const Layout
* layout
,
953 const unsigned char* pshdrs
, Output_file
* of
,
954 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
);
957 // Whether a section needs to be scanned for relocation stubs.
959 section_needs_reloc_stub_scanning(const elfcpp::Shdr
<size
, big_endian
>&,
960 const Relobj::Output_sections
&,
961 const Symbol_table
*, const unsigned char*);
963 // List of stub tables.
964 Stub_table_list stub_tables_
;
965 }; // End of AArch64_relobj
968 // Relocate sections.
970 template<int size
, bool big_endian
>
972 AArch64_relobj
<size
, big_endian
>::do_relocate_sections(
973 const Symbol_table
* symtab
, const Layout
* layout
,
974 const unsigned char* pshdrs
, Output_file
* of
,
975 typename Sized_relobj_file
<size
, big_endian
>::Views
* pviews
)
977 // Call parent to relocate sections.
978 Sized_relobj_file
<size
, big_endian
>::do_relocate_sections(symtab
, layout
,
981 // We do not generate stubs if doing a relocatable link.
982 if (parameters
->options().relocatable())
985 Relocate_info
<size
, big_endian
> relinfo
;
986 relinfo
.symtab
= symtab
;
987 relinfo
.layout
= layout
;
988 relinfo
.object
= this;
990 // Relocate stub tables.
991 unsigned int shnum
= this->shnum();
992 The_target_aarch64
* target
= The_target_aarch64::current_target();
994 for (unsigned int i
= 1; i
< shnum
; ++i
)
996 The_aarch64_input_section
* aarch64_input_section
=
997 target
->find_aarch64_input_section(this, i
);
998 if (aarch64_input_section
!= NULL
999 && aarch64_input_section
->is_stub_table_owner()
1000 && !aarch64_input_section
->stub_table()->empty())
1002 Output_section
* os
= this->output_section(i
);
1003 gold_assert(os
!= NULL
);
1005 relinfo
.reloc_shndx
= elfcpp::SHN_UNDEF
;
1006 relinfo
.reloc_shdr
= NULL
;
1007 relinfo
.data_shndx
= i
;
1008 relinfo
.data_shdr
= pshdrs
+ i
* elfcpp::Elf_sizes
<size
>::shdr_size
;
1010 typename Sized_relobj_file
<size
, big_endian
>::View_size
&
1011 view_struct
= (*pviews
)[i
];
1012 gold_assert(view_struct
.view
!= NULL
);
1014 The_stub_table
* stub_table
= aarch64_input_section
->stub_table();
1015 off_t offset
= stub_table
->address() - view_struct
.address
;
1016 unsigned char* view
= view_struct
.view
+ offset
;
1017 AArch64_address address
= stub_table
->address();
1018 section_size_type view_size
= stub_table
->data_size();
1019 stub_table
->relocate_stubs(&relinfo
, target
, os
, view
, address
,
1026 // Determine if an input section is scannable for stub processing. SHDR is
1027 // the header of the section and SHNDX is the section index. OS is the output
1028 // section for the input section and SYMTAB is the global symbol table used to
1029 // look up ICF information.
1031 template<int size
, bool big_endian
>
1033 AArch64_relobj
<size
, big_endian
>::text_section_is_scannable(
1034 const elfcpp::Shdr
<size
, big_endian
>& text_shdr
,
1035 unsigned int text_shndx
,
1036 const Output_section
* os
,
1037 const Symbol_table
* symtab
)
1039 // Skip any empty sections, unallocated sections or sections whose
1040 // type are not SHT_PROGBITS.
1041 if (text_shdr
.get_sh_size() == 0
1042 || (text_shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) == 0
1043 || text_shdr
.get_sh_type() != elfcpp::SHT_PROGBITS
)
1046 // Skip any discarded or ICF'ed sections.
1047 if (os
== NULL
|| symtab
->is_section_folded(this, text_shndx
))
1050 // Skip exception frame.
1051 if (strcmp(os
->name(), ".eh_frame") == 0)
1054 gold_assert(!this->is_output_section_offset_invalid(text_shndx
) ||
1055 os
->find_relaxed_input_section(this, text_shndx
) != NULL
);
1061 // Determine if we want to scan the SHNDX-th section for relocation stubs.
1062 // This is a helper for AArch64_relobj::scan_sections_for_stubs().
1064 template<int size
, bool big_endian
>
1066 AArch64_relobj
<size
, big_endian
>::section_needs_reloc_stub_scanning(
1067 const elfcpp::Shdr
<size
, big_endian
>& shdr
,
1068 const Relobj::Output_sections
& out_sections
,
1069 const Symbol_table
* symtab
,
1070 const unsigned char* pshdrs
)
1072 unsigned int sh_type
= shdr
.get_sh_type();
1073 if (sh_type
!= elfcpp::SHT_RELA
)
1076 // Ignore empty section.
1077 off_t sh_size
= shdr
.get_sh_size();
1081 // Ignore reloc section with unexpected symbol table. The
1082 // error will be reported in the final link.
1083 if (this->adjust_shndx(shdr
.get_sh_link()) != this->symtab_shndx())
1086 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1087 unsigned int reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
1089 // Ignore reloc section with unexpected entsize or uneven size.
1090 // The error will be reported in the final link.
1091 if (reloc_size
!= shdr
.get_sh_entsize() || sh_size
% reloc_size
!= 0)
1094 // Ignore reloc section with bad info. This error will be
1095 // reported in the final link.
1096 unsigned int text_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1097 if (text_shndx
>= this->shnum())
1100 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1101 const elfcpp::Shdr
<size
, big_endian
> text_shdr(pshdrs
+
1102 text_shndx
* shdr_size
);
1103 return this->text_section_is_scannable(text_shdr
, text_shndx
,
1104 out_sections
[text_shndx
], symtab
);
1108 // Scan relocations for stub generation.
1110 template<int size
, bool big_endian
>
1112 AArch64_relobj
<size
, big_endian
>::scan_sections_for_stubs(
1113 The_target_aarch64
* target
,
1114 const Symbol_table
* symtab
,
1115 const Layout
* layout
)
1117 unsigned int shnum
= this->shnum();
1118 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1120 // Read the section headers.
1121 const unsigned char* pshdrs
= this->get_view(this->elf_file()->shoff(),
1125 // To speed up processing, we set up hash tables for fast lookup of
1126 // input offsets to output addresses.
1127 this->initialize_input_to_output_maps();
1129 const Relobj::Output_sections
& out_sections(this->output_sections());
1131 Relocate_info
<size
, big_endian
> relinfo
;
1132 relinfo
.symtab
= symtab
;
1133 relinfo
.layout
= layout
;
1134 relinfo
.object
= this;
1136 // Do relocation stubs scanning.
1137 const unsigned char* p
= pshdrs
+ shdr_size
;
1138 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= shdr_size
)
1140 const elfcpp::Shdr
<size
, big_endian
> shdr(p
);
1141 if (this->section_needs_reloc_stub_scanning(shdr
, out_sections
, symtab
,
1144 unsigned int index
= this->adjust_shndx(shdr
.get_sh_info());
1145 AArch64_address output_offset
=
1146 this->get_output_section_offset(index
);
1147 AArch64_address output_address
;
1148 if (output_offset
!= invalid_address
)
1150 output_address
= out_sections
[index
]->address() + output_offset
;
1154 // Currently this only happens for a relaxed section.
1155 const Output_relaxed_input_section
* poris
=
1156 out_sections
[index
]->find_relaxed_input_section(this, index
);
1157 gold_assert(poris
!= NULL
);
1158 output_address
= poris
->address();
1161 // Get the relocations.
1162 const unsigned char* prelocs
= this->get_view(shdr
.get_sh_offset(),
1166 // Get the section contents.
1167 section_size_type input_view_size
= 0;
1168 const unsigned char* input_view
=
1169 this->section_contents(index
, &input_view_size
, false);
1171 relinfo
.reloc_shndx
= i
;
1172 relinfo
.data_shndx
= index
;
1173 unsigned int sh_type
= shdr
.get_sh_type();
1174 unsigned int reloc_size
;
1175 gold_assert (sh_type
== elfcpp::SHT_RELA
);
1176 reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
1178 Output_section
* os
= out_sections
[index
];
1179 target
->scan_section_for_stubs(&relinfo
, sh_type
, prelocs
,
1180 shdr
.get_sh_size() / reloc_size
,
1182 output_offset
== invalid_address
,
1183 input_view
, output_address
,
1190 // A class to wrap an ordinary input section containing executable code.
1192 template<int size
, bool big_endian
>
1193 class AArch64_input_section
: public Output_relaxed_input_section
1196 typedef Stub_table
<size
, big_endian
> The_stub_table
;
1198 AArch64_input_section(Relobj
* relobj
, unsigned int shndx
)
1199 : Output_relaxed_input_section(relobj
, shndx
, 1),
1201 original_contents_(NULL
), original_size_(0),
1202 original_addralign_(1)
1205 ~AArch64_input_section()
1206 { delete[] this->original_contents_
; }
1212 // Set the stub_table.
1214 set_stub_table(The_stub_table
* st
)
1215 { this->stub_table_
= st
; }
1217 // Whether this is a stub table owner.
1219 is_stub_table_owner() const
1220 { return this->stub_table_
!= NULL
&& this->stub_table_
->owner() == this; }
1222 // Return the original size of the section.
1224 original_size() const
1225 { return this->original_size_
; }
1227 // Return the stub table.
1230 { return stub_table_
; }
1233 // Write out this input section.
1235 do_write(Output_file
*);
1237 // Return required alignment of this.
1239 do_addralign() const
1241 if (this->is_stub_table_owner())
1242 return std::max(this->stub_table_
->addralign(),
1243 static_cast<uint64_t>(this->original_addralign_
));
1245 return this->original_addralign_
;
1248 // Finalize data size.
1250 set_final_data_size();
1252 // Reset address and file offset.
1254 do_reset_address_and_file_offset();
1258 do_output_offset(const Relobj
* object
, unsigned int shndx
,
1259 section_offset_type offset
,
1260 section_offset_type
* poutput
) const
1262 if ((object
== this->relobj())
1263 && (shndx
== this->shndx())
1266 convert_types
<section_offset_type
, uint32_t>(this->original_size_
)))
1276 // Copying is not allowed.
1277 AArch64_input_section(const AArch64_input_section
&);
1278 AArch64_input_section
& operator=(const AArch64_input_section
&);
1280 // The relocation stubs.
1281 The_stub_table
* stub_table_
;
1282 // Original section contents. We have to make a copy here since the file
1283 // containing the original section may not be locked when we need to access
1285 unsigned char* original_contents_
;
1286 // Section size of the original input section.
1287 uint32_t original_size_
;
1288 // Address alignment of the original input section.
1289 uint32_t original_addralign_
;
1290 }; // End of AArch64_input_section
1293 // Finalize data size.
1295 template<int size
, bool big_endian
>
1297 AArch64_input_section
<size
, big_endian
>::set_final_data_size()
1299 off_t off
= convert_types
<off_t
, uint64_t>(this->original_size_
);
1301 if (this->is_stub_table_owner())
1303 this->stub_table_
->finalize_data_size();
1304 off
= align_address(off
, this->stub_table_
->addralign());
1305 off
+= this->stub_table_
->data_size();
1307 this->set_data_size(off
);
1311 // Reset address and file offset.
1313 template<int size
, bool big_endian
>
1315 AArch64_input_section
<size
, big_endian
>::do_reset_address_and_file_offset()
1317 // Size of the original input section contents.
1318 off_t off
= convert_types
<off_t
, uint64_t>(this->original_size_
);
1320 // If this is a stub table owner, account for the stub table size.
1321 if (this->is_stub_table_owner())
1323 The_stub_table
* stub_table
= this->stub_table_
;
1325 // Reset the stub table's address and file offset. The
1326 // current data size for child will be updated after that.
1327 stub_table_
->reset_address_and_file_offset();
1328 off
= align_address(off
, stub_table_
->addralign());
1329 off
+= stub_table
->current_data_size();
1332 this->set_current_data_size(off
);
1336 // Initialize an Arm_input_section.
1338 template<int size
, bool big_endian
>
1340 AArch64_input_section
<size
, big_endian
>::init()
1342 Relobj
* relobj
= this->relobj();
1343 unsigned int shndx
= this->shndx();
1345 // We have to cache original size, alignment and contents to avoid locking
1346 // the original file.
1347 this->original_addralign_
=
1348 convert_types
<uint32_t, uint64_t>(relobj
->section_addralign(shndx
));
1350 // This is not efficient but we expect only a small number of relaxed
1351 // input sections for stubs.
1352 section_size_type section_size
;
1353 const unsigned char* section_contents
=
1354 relobj
->section_contents(shndx
, §ion_size
, false);
1355 this->original_size_
=
1356 convert_types
<uint32_t, uint64_t>(relobj
->section_size(shndx
));
1358 gold_assert(this->original_contents_
== NULL
);
1359 this->original_contents_
= new unsigned char[section_size
];
1360 memcpy(this->original_contents_
, section_contents
, section_size
);
1362 // We want to make this look like the original input section after
1363 // output sections are finalized.
1364 Output_section
* os
= relobj
->output_section(shndx
);
1365 off_t offset
= relobj
->output_section_offset(shndx
);
1366 gold_assert(os
!= NULL
&& !relobj
->is_output_section_offset_invalid(shndx
));
1367 this->set_address(os
->address() + offset
);
1368 this->set_file_offset(os
->offset() + offset
);
1369 this->set_current_data_size(this->original_size_
);
1370 this->finalize_data_size();
1374 // Write data to output file.
1376 template<int size
, bool big_endian
>
1378 AArch64_input_section
<size
, big_endian
>::do_write(Output_file
* of
)
1380 // We have to write out the original section content.
1381 gold_assert(this->original_contents_
!= NULL
);
1382 of
->write(this->offset(), this->original_contents_
,
1383 this->original_size_
);
1385 // If this owns a stub table and it is not empty, write it.
1386 if (this->is_stub_table_owner() && !this->stub_table_
->empty())
1387 this->stub_table_
->write(of
);
1391 // Arm output section class. This is defined mainly to add a number of stub
1392 // generation methods.
1394 template<int size
, bool big_endian
>
1395 class AArch64_output_section
: public Output_section
1398 typedef Target_aarch64
<size
, big_endian
> The_target_aarch64
;
1399 typedef AArch64_relobj
<size
, big_endian
> The_aarch64_relobj
;
1400 typedef Stub_table
<size
, big_endian
> The_stub_table
;
1401 typedef AArch64_input_section
<size
, big_endian
> The_aarch64_input_section
;
1404 AArch64_output_section(const char* name
, elfcpp::Elf_Word type
,
1405 elfcpp::Elf_Xword flags
)
1406 : Output_section(name
, type
, flags
)
1409 ~AArch64_output_section() {}
1411 // Group input sections for stub generation.
1413 group_sections(section_size_type
, bool, Target_aarch64
<size
, big_endian
>*,
1417 typedef Output_section::Input_section Input_section
;
1418 typedef Output_section::Input_section_list Input_section_list
;
1420 // Create a stub group.
1422 create_stub_group(Input_section_list::const_iterator
,
1423 Input_section_list::const_iterator
,
1424 Input_section_list::const_iterator
,
1425 The_target_aarch64
*,
1426 std::vector
<Output_relaxed_input_section
*>&,
1428 }; // End of AArch64_output_section
1431 // Create a stub group for input sections from FIRST to LAST. OWNER points to
1432 // the input section that will be the owner of the stub table.
1434 template<int size
, bool big_endian
> void
1435 AArch64_output_section
<size
, big_endian
>::create_stub_group(
1436 Input_section_list::const_iterator first
,
1437 Input_section_list::const_iterator last
,
1438 Input_section_list::const_iterator owner
,
1439 The_target_aarch64
* target
,
1440 std::vector
<Output_relaxed_input_section
*>& new_relaxed_sections
,
1443 // Currently we convert ordinary input sections into relaxed sections only
1445 The_aarch64_input_section
* input_section
;
1446 if (owner
->is_relaxed_input_section())
1450 gold_assert(owner
->is_input_section());
1451 // Create a new relaxed input section. We need to lock the original
1453 Task_lock_obj
<Object
> tl(task
, owner
->relobj());
1455 target
->new_aarch64_input_section(owner
->relobj(), owner
->shndx());
1456 new_relaxed_sections
.push_back(input_section
);
1459 // Create a stub table.
1460 The_stub_table
* stub_table
=
1461 target
->new_stub_table(input_section
);
1463 input_section
->set_stub_table(stub_table
);
1465 Input_section_list::const_iterator p
= first
;
1466 // Look for input sections or relaxed input sections in [first ... last].
1469 if (p
->is_input_section() || p
->is_relaxed_input_section())
1471 // The stub table information for input sections live
1472 // in their objects.
1473 The_aarch64_relobj
* aarch64_relobj
=
1474 static_cast<The_aarch64_relobj
*>(p
->relobj());
1475 aarch64_relobj
->set_stub_table(p
->shndx(), stub_table
);
1478 while (p
++ != last
);
1482 // Group input sections for stub generation. GROUP_SIZE is roughly the limit of
1483 // stub groups. We grow a stub group by adding input section until the size is
1484 // just below GROUP_SIZE. The last input section will be converted into a stub
1485 // table owner. If STUB_ALWAYS_AFTER_BRANCH is false, we also add input sectiond
1486 // after the stub table, effectively doubling the group size.
1488 // This is similar to the group_sections() function in elf32-arm.c but is
1489 // implemented differently.
1491 template<int size
, bool big_endian
>
1492 void AArch64_output_section
<size
, big_endian
>::group_sections(
1493 section_size_type group_size
,
1494 bool stubs_always_after_branch
,
1495 Target_aarch64
<size
, big_endian
>* target
,
1501 FINDING_STUB_SECTION
,
1505 std::vector
<Output_relaxed_input_section
*> new_relaxed_sections
;
1507 State state
= NO_GROUP
;
1508 section_size_type off
= 0;
1509 section_size_type group_begin_offset
= 0;
1510 section_size_type group_end_offset
= 0;
1511 section_size_type stub_table_end_offset
= 0;
1512 Input_section_list::const_iterator group_begin
=
1513 this->input_sections().end();
1514 Input_section_list::const_iterator stub_table
=
1515 this->input_sections().end();
1516 Input_section_list::const_iterator group_end
= this->input_sections().end();
1517 for (Input_section_list::const_iterator p
= this->input_sections().begin();
1518 p
!= this->input_sections().end();
1521 section_size_type section_begin_offset
=
1522 align_address(off
, p
->addralign());
1523 section_size_type section_end_offset
=
1524 section_begin_offset
+ p
->data_size();
1526 // Check to see if we should group the previously seen sections.
1532 case FINDING_STUB_SECTION
:
1533 // Adding this section makes the group larger than GROUP_SIZE.
1534 if (section_end_offset
- group_begin_offset
>= group_size
)
1536 if (stubs_always_after_branch
)
1538 gold_assert(group_end
!= this->input_sections().end());
1539 this->create_stub_group(group_begin
, group_end
, group_end
,
1540 target
, new_relaxed_sections
,
1546 // Input sections up to stub_group_size bytes after the stub
1547 // table can be handled by it too.
1548 state
= HAS_STUB_SECTION
;
1549 stub_table
= group_end
;
1550 stub_table_end_offset
= group_end_offset
;
1555 case HAS_STUB_SECTION
:
1556 // Adding this section makes the post stub-section group larger
1559 // NOT SUPPORTED YET. For completeness only.
1560 if (section_end_offset
- stub_table_end_offset
>= group_size
)
1562 gold_assert(group_end
!= this->input_sections().end());
1563 this->create_stub_group(group_begin
, group_end
, stub_table
,
1564 target
, new_relaxed_sections
, task
);
1573 // If we see an input section and currently there is no group, start
1574 // a new one. Skip any empty sections. We look at the data size
1575 // instead of calling p->relobj()->section_size() to avoid locking.
1576 if ((p
->is_input_section() || p
->is_relaxed_input_section())
1577 && (p
->data_size() != 0))
1579 if (state
== NO_GROUP
)
1581 state
= FINDING_STUB_SECTION
;
1583 group_begin_offset
= section_begin_offset
;
1586 // Keep track of the last input section seen.
1588 group_end_offset
= section_end_offset
;
1591 off
= section_end_offset
;
1594 // Create a stub group for any ungrouped sections.
1595 if (state
== FINDING_STUB_SECTION
|| state
== HAS_STUB_SECTION
)
1597 gold_assert(group_end
!= this->input_sections().end());
1598 this->create_stub_group(group_begin
, group_end
,
1599 (state
== FINDING_STUB_SECTION
1602 target
, new_relaxed_sections
, task
);
1605 if (!new_relaxed_sections
.empty())
1606 this->convert_input_sections_to_relaxed_sections(new_relaxed_sections
);
1608 // Update the section offsets
1609 for (size_t i
= 0; i
< new_relaxed_sections
.size(); ++i
)
1611 The_aarch64_relobj
* relobj
= static_cast<The_aarch64_relobj
*>(
1612 new_relaxed_sections
[i
]->relobj());
1613 unsigned int shndx
= new_relaxed_sections
[i
]->shndx();
1614 // Tell AArch64_relobj that this input section is converted.
1615 relobj
->convert_input_section_to_relaxed_section(shndx
);
1617 } // End of AArch64_output_section::group_sections
1620 AArch64_reloc_property_table
* aarch64_reloc_property_table
= NULL
;
1623 // The aarch64 target class.
1625 // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf
1626 template<int size
, bool big_endian
>
1627 class Target_aarch64
: public Sized_target
<size
, big_endian
>
1630 typedef Target_aarch64
<size
, big_endian
> This
;
1631 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>
1633 typedef Relocate_info
<size
, big_endian
> The_relocate_info
;
1634 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1635 typedef AArch64_relobj
<size
, big_endian
> The_aarch64_relobj
;
1636 typedef Reloc_stub
<size
, big_endian
> The_reloc_stub
;
1637 typedef typename
The_reloc_stub::Stub_type The_reloc_stub_type
;
1638 typedef typename Reloc_stub
<size
, big_endian
>::Key The_reloc_stub_key
;
1639 typedef Stub_table
<size
, big_endian
> The_stub_table
;
1640 typedef std::vector
<The_stub_table
*> Stub_table_list
;
1641 typedef typename
Stub_table_list::iterator Stub_table_iterator
;
1642 typedef AArch64_input_section
<size
, big_endian
> The_aarch64_input_section
;
1643 typedef AArch64_output_section
<size
, big_endian
> The_aarch64_output_section
;
1644 typedef Unordered_map
<Section_id
,
1645 AArch64_input_section
<size
, big_endian
>*,
1646 Section_id_hash
> AArch64_input_section_map
;
1647 const static int TCB_SIZE
= size
/ 8 * 2;
1649 Target_aarch64(const Target::Target_info
* info
= &aarch64_info
)
1650 : Sized_target
<size
, big_endian
>(info
),
1651 got_(NULL
), plt_(NULL
), got_plt_(NULL
), got_irelative_(NULL
),
1652 got_tlsdesc_(NULL
), global_offset_table_(NULL
), rela_dyn_(NULL
),
1653 rela_irelative_(NULL
), copy_relocs_(elfcpp::R_AARCH64_COPY
),
1654 got_mod_index_offset_(-1U),
1655 tlsdesc_reloc_info_(), tls_base_symbol_defined_(false),
1656 stub_tables_(), aarch64_input_section_map_()
1659 // Scan the relocations to determine unreferenced sections for
1660 // garbage collection.
1662 gc_process_relocs(Symbol_table
* symtab
,
1664 Sized_relobj_file
<size
, big_endian
>* object
,
1665 unsigned int data_shndx
,
1666 unsigned int sh_type
,
1667 const unsigned char* prelocs
,
1669 Output_section
* output_section
,
1670 bool needs_special_offset_handling
,
1671 size_t local_symbol_count
,
1672 const unsigned char* plocal_symbols
);
1674 // Scan the relocations to look for symbol adjustments.
1676 scan_relocs(Symbol_table
* symtab
,
1678 Sized_relobj_file
<size
, big_endian
>* object
,
1679 unsigned int data_shndx
,
1680 unsigned int sh_type
,
1681 const unsigned char* prelocs
,
1683 Output_section
* output_section
,
1684 bool needs_special_offset_handling
,
1685 size_t local_symbol_count
,
1686 const unsigned char* plocal_symbols
);
1688 // Finalize the sections.
1690 do_finalize_sections(Layout
*, const Input_objects
*, Symbol_table
*);
1692 // Return the value to use for a dynamic which requires special
1695 do_dynsym_value(const Symbol
*) const;
1697 // Relocate a section.
1699 relocate_section(const Relocate_info
<size
, big_endian
>*,
1700 unsigned int sh_type
,
1701 const unsigned char* prelocs
,
1703 Output_section
* output_section
,
1704 bool needs_special_offset_handling
,
1705 unsigned char* view
,
1706 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
1707 section_size_type view_size
,
1708 const Reloc_symbol_changes
*);
1710 // Scan the relocs during a relocatable link.
1712 scan_relocatable_relocs(Symbol_table
* symtab
,
1714 Sized_relobj_file
<size
, big_endian
>* object
,
1715 unsigned int data_shndx
,
1716 unsigned int sh_type
,
1717 const unsigned char* prelocs
,
1719 Output_section
* output_section
,
1720 bool needs_special_offset_handling
,
1721 size_t local_symbol_count
,
1722 const unsigned char* plocal_symbols
,
1723 Relocatable_relocs
*);
1725 // Relocate a section during a relocatable link.
1728 const Relocate_info
<size
, big_endian
>*,
1729 unsigned int sh_type
,
1730 const unsigned char* prelocs
,
1732 Output_section
* output_section
,
1733 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
1734 const Relocatable_relocs
*,
1735 unsigned char* view
,
1736 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
1737 section_size_type view_size
,
1738 unsigned char* reloc_view
,
1739 section_size_type reloc_view_size
);
1741 // Return the symbol index to use for a target specific relocation.
1742 // The only target specific relocation is R_AARCH64_TLSDESC for a
1743 // local symbol, which is an absolute reloc.
1745 do_reloc_symbol_index(void*, unsigned int r_type
) const
1747 gold_assert(r_type
== elfcpp::R_AARCH64_TLSDESC
);
1751 // Return the addend to use for a target specific relocation.
1752 typename
elfcpp::Elf_types
<size
>::Elf_Addr
1753 do_reloc_addend(void* arg
, unsigned int r_type
,
1754 typename
elfcpp::Elf_types
<size
>::Elf_Addr addend
) const;
1756 // Return the PLT section.
1758 do_plt_address_for_global(const Symbol
* gsym
) const
1759 { return this->plt_section()->address_for_global(gsym
); }
1762 do_plt_address_for_local(const Relobj
* relobj
, unsigned int symndx
) const
1763 { return this->plt_section()->address_for_local(relobj
, symndx
); }
1765 // Return the number of entries in the PLT.
1767 plt_entry_count() const;
1769 //Return the offset of the first non-reserved PLT entry.
1771 first_plt_entry_offset() const;
1773 // Return the size of each PLT entry.
1775 plt_entry_size() const;
1777 // Create a stub table.
1779 new_stub_table(The_aarch64_input_section
*);
1781 // Create an aarch64 input section.
1782 The_aarch64_input_section
*
1783 new_aarch64_input_section(Relobj
*, unsigned int);
1785 // Find an aarch64 input section instance for a given OBJ and SHNDX.
1786 The_aarch64_input_section
*
1787 find_aarch64_input_section(Relobj
*, unsigned int) const;
1789 // Return the thread control block size.
1791 tcb_size() const { return This::TCB_SIZE
; }
1793 // Scan a section for stub generation.
1795 scan_section_for_stubs(const Relocate_info
<size
, big_endian
>*, unsigned int,
1796 const unsigned char*, size_t, Output_section
*,
1797 bool, const unsigned char*,
1801 // Scan a relocation section for stub.
1802 template<int sh_type
>
1804 scan_reloc_section_for_stubs(
1805 const The_relocate_info
* relinfo
,
1806 const unsigned char* prelocs
,
1808 Output_section
* output_section
,
1809 bool needs_special_offset_handling
,
1810 const unsigned char* view
,
1811 Address view_address
,
1814 // Relocate a single stub.
1816 relocate_stub(The_reloc_stub
*, const Relocate_info
<size
, big_endian
>*,
1817 Output_section
*, unsigned char*, Address
,
1820 // Get the default AArch64 target.
1824 gold_assert(parameters
->target().machine_code() == elfcpp::EM_AARCH64
1825 && parameters
->target().get_size() == size
1826 && parameters
->target().is_big_endian() == big_endian
);
1827 return static_cast<This
*>(parameters
->sized_target
<size
, big_endian
>());
1832 do_select_as_default_target()
1834 gold_assert(aarch64_reloc_property_table
== NULL
);
1835 aarch64_reloc_property_table
= new AArch64_reloc_property_table();
1838 // Add a new reloc argument, returning the index in the vector.
1840 add_tlsdesc_info(Sized_relobj_file
<size
, big_endian
>* object
,
1843 this->tlsdesc_reloc_info_
.push_back(Tlsdesc_info(object
, r_sym
));
1844 return this->tlsdesc_reloc_info_
.size() - 1;
1847 virtual Output_data_plt_aarch64
<size
, big_endian
>*
1848 do_make_data_plt(Layout
* layout
,
1849 Output_data_got_aarch64
<size
, big_endian
>* got
,
1850 Output_data_space
* got_plt
,
1851 Output_data_space
* got_irelative
)
1853 return new Output_data_plt_aarch64_standard
<size
, big_endian
>(
1854 layout
, got
, got_plt
, got_irelative
);
1858 // do_make_elf_object to override the same function in the base class.
1860 do_make_elf_object(const std::string
&, Input_file
*, off_t
,
1861 const elfcpp::Ehdr
<size
, big_endian
>&);
1863 Output_data_plt_aarch64
<size
, big_endian
>*
1864 make_data_plt(Layout
* layout
,
1865 Output_data_got_aarch64
<size
, big_endian
>* got
,
1866 Output_data_space
* got_plt
,
1867 Output_data_space
* got_irelative
)
1869 return this->do_make_data_plt(layout
, got
, got_plt
, got_irelative
);
1872 // We only need to generate stubs, and hence perform relaxation if we are
1873 // not doing relocatable linking.
1875 do_may_relax() const
1876 { return !parameters
->options().relocatable(); }
1878 // Relaxation hook. This is where we do stub generation.
1880 do_relax(int, const Input_objects
*, Symbol_table
*, Layout
*, const Task
*);
1883 group_sections(Layout
* layout
,
1884 section_size_type group_size
,
1885 bool stubs_always_after_branch
,
1889 scan_reloc_for_stub(const The_relocate_info
*, unsigned int,
1890 const Sized_symbol
<size
>*, unsigned int,
1891 const Symbol_value
<size
>*,
1892 typename
elfcpp::Elf_types
<size
>::Elf_Swxword
,
1895 // Make an output section.
1897 do_make_output_section(const char* name
, elfcpp::Elf_Word type
,
1898 elfcpp::Elf_Xword flags
)
1899 { return new The_aarch64_output_section(name
, type
, flags
); }
1902 // The class which scans relocations.
1907 : issued_non_pic_error_(false)
1911 local(Symbol_table
* symtab
, Layout
* layout
, Target_aarch64
* target
,
1912 Sized_relobj_file
<size
, big_endian
>* object
,
1913 unsigned int data_shndx
,
1914 Output_section
* output_section
,
1915 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1916 const elfcpp::Sym
<size
, big_endian
>& lsym
,
1920 global(Symbol_table
* symtab
, Layout
* layout
, Target_aarch64
* target
,
1921 Sized_relobj_file
<size
, big_endian
>* object
,
1922 unsigned int data_shndx
,
1923 Output_section
* output_section
,
1924 const elfcpp::Rela
<size
, big_endian
>& reloc
, unsigned int r_type
,
1928 local_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1929 Target_aarch64
<size
, big_endian
>* ,
1930 Sized_relobj_file
<size
, big_endian
>* ,
1933 const elfcpp::Rela
<size
, big_endian
>& ,
1934 unsigned int r_type
,
1935 const elfcpp::Sym
<size
, big_endian
>&);
1938 global_reloc_may_be_function_pointer(Symbol_table
* , Layout
* ,
1939 Target_aarch64
<size
, big_endian
>* ,
1940 Sized_relobj_file
<size
, big_endian
>* ,
1943 const elfcpp::Rela
<size
, big_endian
>& ,
1944 unsigned int r_type
,
1949 unsupported_reloc_local(Sized_relobj_file
<size
, big_endian
>*,
1950 unsigned int r_type
);
1953 unsupported_reloc_global(Sized_relobj_file
<size
, big_endian
>*,
1954 unsigned int r_type
, Symbol
*);
1957 possible_function_pointer_reloc(unsigned int r_type
);
1960 check_non_pic(Relobj
*, unsigned int r_type
);
1962 // Whether we have issued an error about a non-PIC compilation.
1963 bool issued_non_pic_error_
;
1966 // The class which implements relocation.
1971 : skip_call_tls_get_addr_(false)
1977 // Do a relocation. Return false if the caller should not issue
1978 // any warnings about this relocation.
1980 relocate(const Relocate_info
<size
, big_endian
>*, Target_aarch64
*,
1982 size_t relnum
, const elfcpp::Rela
<size
, big_endian
>&,
1983 unsigned int r_type
, const Sized_symbol
<size
>*,
1984 const Symbol_value
<size
>*,
1985 unsigned char*, typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
1989 inline typename AArch64_relocate_functions
<size
, big_endian
>::Status
1990 relocate_tls(const Relocate_info
<size
, big_endian
>*,
1991 Target_aarch64
<size
, big_endian
>*,
1993 const elfcpp::Rela
<size
, big_endian
>&,
1994 unsigned int r_type
, const Sized_symbol
<size
>*,
1995 const Symbol_value
<size
>*,
1997 typename
elfcpp::Elf_types
<size
>::Elf_Addr
);
1999 inline typename AArch64_relocate_functions
<size
, big_endian
>::Status
2001 const Relocate_info
<size
, big_endian
>*,
2002 Target_aarch64
<size
, big_endian
>*,
2003 const elfcpp::Rela
<size
, big_endian
>&,
2006 const Symbol_value
<size
>*);
2008 inline typename AArch64_relocate_functions
<size
, big_endian
>::Status
2010 const Relocate_info
<size
, big_endian
>*,
2011 Target_aarch64
<size
, big_endian
>*,
2012 const elfcpp::Rela
<size
, big_endian
>&,
2015 const Symbol_value
<size
>*);
2017 inline typename AArch64_relocate_functions
<size
, big_endian
>::Status
2019 const Relocate_info
<size
, big_endian
>*,
2020 Target_aarch64
<size
, big_endian
>*,
2021 const elfcpp::Rela
<size
, big_endian
>&,
2024 const Symbol_value
<size
>*);
2026 inline typename AArch64_relocate_functions
<size
, big_endian
>::Status
2028 const Relocate_info
<size
, big_endian
>*,
2029 Target_aarch64
<size
, big_endian
>*,
2030 const elfcpp::Rela
<size
, big_endian
>&,
2033 const Symbol_value
<size
>*,
2034 typename
elfcpp::Elf_types
<size
>::Elf_Addr
,
2035 typename
elfcpp::Elf_types
<size
>::Elf_Addr
);
2037 bool skip_call_tls_get_addr_
;
2039 }; // End of class Relocate
2041 // A class which returns the size required for a relocation type,
2042 // used while scanning relocs during a relocatable link.
2043 class Relocatable_size_for_reloc
2047 get_size_for_reloc(unsigned int, Relobj
*);
2050 // Adjust TLS relocation type based on the options and whether this
2051 // is a local symbol.
2052 static tls::Tls_optimization
2053 optimize_tls_reloc(bool is_final
, int r_type
);
2055 // Get the GOT section, creating it if necessary.
2056 Output_data_got_aarch64
<size
, big_endian
>*
2057 got_section(Symbol_table
*, Layout
*);
2059 // Get the GOT PLT section.
2061 got_plt_section() const
2063 gold_assert(this->got_plt_
!= NULL
);
2064 return this->got_plt_
;
2067 // Get the GOT section for TLSDESC entries.
2068 Output_data_got
<size
, big_endian
>*
2069 got_tlsdesc_section() const
2071 gold_assert(this->got_tlsdesc_
!= NULL
);
2072 return this->got_tlsdesc_
;
2075 // Create the PLT section.
2077 make_plt_section(Symbol_table
* symtab
, Layout
* layout
);
2079 // Create a PLT entry for a global symbol.
2081 make_plt_entry(Symbol_table
*, Layout
*, Symbol
*);
2083 // Create a PLT entry for a local STT_GNU_IFUNC symbol.
2085 make_local_ifunc_plt_entry(Symbol_table
*, Layout
*,
2086 Sized_relobj_file
<size
, big_endian
>* relobj
,
2087 unsigned int local_sym_index
);
2089 // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
2091 define_tls_base_symbol(Symbol_table
*, Layout
*);
2093 // Create the reserved PLT and GOT entries for the TLS descriptor resolver.
2095 reserve_tlsdesc_entries(Symbol_table
* symtab
, Layout
* layout
);
2097 // Create a GOT entry for the TLS module index.
2099 got_mod_index_entry(Symbol_table
* symtab
, Layout
* layout
,
2100 Sized_relobj_file
<size
, big_endian
>* object
);
2102 // Get the PLT section.
2103 Output_data_plt_aarch64
<size
, big_endian
>*
2106 gold_assert(this->plt_
!= NULL
);
2110 // Get the dynamic reloc section, creating it if necessary.
2112 rela_dyn_section(Layout
*);
2114 // Get the section to use for TLSDESC relocations.
2116 rela_tlsdesc_section(Layout
*) const;
2118 // Get the section to use for IRELATIVE relocations.
2120 rela_irelative_section(Layout
*);
2122 // Add a potential copy relocation.
2124 copy_reloc(Symbol_table
* symtab
, Layout
* layout
,
2125 Sized_relobj_file
<size
, big_endian
>* object
,
2126 unsigned int shndx
, Output_section
* output_section
,
2127 Symbol
* sym
, const elfcpp::Rela
<size
, big_endian
>& reloc
)
2129 this->copy_relocs_
.copy_reloc(symtab
, layout
,
2130 symtab
->get_sized_symbol
<size
>(sym
),
2131 object
, shndx
, output_section
,
2132 reloc
, this->rela_dyn_section(layout
));
2135 // Information about this specific target which we pass to the
2136 // general Target structure.
2137 static const Target::Target_info aarch64_info
;
2139 // The types of GOT entries needed for this platform.
2140 // These values are exposed to the ABI in an incremental link.
2141 // Do not renumber existing values without changing the version
2142 // number of the .gnu_incremental_inputs section.
2145 GOT_TYPE_STANDARD
= 0, // GOT entry for a regular symbol
2146 GOT_TYPE_TLS_OFFSET
= 1, // GOT entry for TLS offset
2147 GOT_TYPE_TLS_PAIR
= 2, // GOT entry for TLS module/offset pair
2148 GOT_TYPE_TLS_DESC
= 3 // GOT entry for TLS_DESC pair
2151 // This type is used as the argument to the target specific
2152 // relocation routines. The only target specific reloc is
2153 // R_AARCh64_TLSDESC against a local symbol.
2156 Tlsdesc_info(Sized_relobj_file
<size
, big_endian
>* a_object
,
2157 unsigned int a_r_sym
)
2158 : object(a_object
), r_sym(a_r_sym
)
2161 // The object in which the local symbol is defined.
2162 Sized_relobj_file
<size
, big_endian
>* object
;
2163 // The local symbol index in the object.
2168 Output_data_got_aarch64
<size
, big_endian
>* got_
;
2170 Output_data_plt_aarch64
<size
, big_endian
>* plt_
;
2171 // The GOT PLT section.
2172 Output_data_space
* got_plt_
;
2173 // The GOT section for IRELATIVE relocations.
2174 Output_data_space
* got_irelative_
;
2175 // The GOT section for TLSDESC relocations.
2176 Output_data_got
<size
, big_endian
>* got_tlsdesc_
;
2177 // The _GLOBAL_OFFSET_TABLE_ symbol.
2178 Symbol
* global_offset_table_
;
2179 // The dynamic reloc section.
2180 Reloc_section
* rela_dyn_
;
2181 // The section to use for IRELATIVE relocs.
2182 Reloc_section
* rela_irelative_
;
2183 // Relocs saved to avoid a COPY reloc.
2184 Copy_relocs
<elfcpp::SHT_RELA
, size
, big_endian
> copy_relocs_
;
2185 // Offset of the GOT entry for the TLS module index.
2186 unsigned int got_mod_index_offset_
;
2187 // We handle R_AARCH64_TLSDESC against a local symbol as a target
2188 // specific relocation. Here we store the object and local symbol
2189 // index for the relocation.
2190 std::vector
<Tlsdesc_info
> tlsdesc_reloc_info_
;
2191 // True if the _TLS_MODULE_BASE_ symbol has been defined.
2192 bool tls_base_symbol_defined_
;
2193 // List of stub_tables
2194 Stub_table_list stub_tables_
;
2195 AArch64_input_section_map aarch64_input_section_map_
;
2196 }; // End of Target_aarch64
2200 const Target::Target_info Target_aarch64
<64, false>::aarch64_info
=
2203 false, // is_big_endian
2204 elfcpp::EM_AARCH64
, // machine_code
2205 false, // has_make_symbol
2206 false, // has_resolve
2207 false, // has_code_fill
2208 true, // is_default_stack_executable
2209 false, // can_icf_inline_merge_sections
2211 "/lib/ld.so.1", // program interpreter
2212 0x400000, // default_text_segment_address
2213 0x1000, // abi_pagesize (overridable by -z max-page-size)
2214 0x1000, // common_pagesize (overridable by -z common-page-size)
2215 false, // isolate_execinstr
2217 elfcpp::SHN_UNDEF
, // small_common_shndx
2218 elfcpp::SHN_UNDEF
, // large_common_shndx
2219 0, // small_common_section_flags
2220 0, // large_common_section_flags
2221 NULL
, // attributes_section
2222 NULL
, // attributes_vendor
2223 "_start" // entry_symbol_name
2227 const Target::Target_info Target_aarch64
<32, false>::aarch64_info
=
2230 false, // is_big_endian
2231 elfcpp::EM_AARCH64
, // machine_code
2232 false, // has_make_symbol
2233 false, // has_resolve
2234 false, // has_code_fill
2235 true, // is_default_stack_executable
2236 false, // can_icf_inline_merge_sections
2238 "/lib/ld.so.1", // program interpreter
2239 0x400000, // default_text_segment_address
2240 0x1000, // abi_pagesize (overridable by -z max-page-size)
2241 0x1000, // common_pagesize (overridable by -z common-page-size)
2242 false, // isolate_execinstr
2244 elfcpp::SHN_UNDEF
, // small_common_shndx
2245 elfcpp::SHN_UNDEF
, // large_common_shndx
2246 0, // small_common_section_flags
2247 0, // large_common_section_flags
2248 NULL
, // attributes_section
2249 NULL
, // attributes_vendor
2250 "_start" // entry_symbol_name
2254 const Target::Target_info Target_aarch64
<64, true>::aarch64_info
=
2257 true, // is_big_endian
2258 elfcpp::EM_AARCH64
, // machine_code
2259 false, // has_make_symbol
2260 false, // has_resolve
2261 false, // has_code_fill
2262 true, // is_default_stack_executable
2263 false, // can_icf_inline_merge_sections
2265 "/lib/ld.so.1", // program interpreter
2266 0x400000, // default_text_segment_address
2267 0x1000, // abi_pagesize (overridable by -z max-page-size)
2268 0x1000, // common_pagesize (overridable by -z common-page-size)
2269 false, // isolate_execinstr
2271 elfcpp::SHN_UNDEF
, // small_common_shndx
2272 elfcpp::SHN_UNDEF
, // large_common_shndx
2273 0, // small_common_section_flags
2274 0, // large_common_section_flags
2275 NULL
, // attributes_section
2276 NULL
, // attributes_vendor
2277 "_start" // entry_symbol_name
2281 const Target::Target_info Target_aarch64
<32, true>::aarch64_info
=
2284 true, // is_big_endian
2285 elfcpp::EM_AARCH64
, // machine_code
2286 false, // has_make_symbol
2287 false, // has_resolve
2288 false, // has_code_fill
2289 true, // is_default_stack_executable
2290 false, // can_icf_inline_merge_sections
2292 "/lib/ld.so.1", // program interpreter
2293 0x400000, // default_text_segment_address
2294 0x1000, // abi_pagesize (overridable by -z max-page-size)
2295 0x1000, // common_pagesize (overridable by -z common-page-size)
2296 false, // isolate_execinstr
2298 elfcpp::SHN_UNDEF
, // small_common_shndx
2299 elfcpp::SHN_UNDEF
, // large_common_shndx
2300 0, // small_common_section_flags
2301 0, // large_common_section_flags
2302 NULL
, // attributes_section
2303 NULL
, // attributes_vendor
2304 "_start" // entry_symbol_name
2307 // Get the GOT section, creating it if necessary.
2309 template<int size
, bool big_endian
>
2310 Output_data_got_aarch64
<size
, big_endian
>*
2311 Target_aarch64
<size
, big_endian
>::got_section(Symbol_table
* symtab
,
2314 if (this->got_
== NULL
)
2316 gold_assert(symtab
!= NULL
&& layout
!= NULL
);
2318 // When using -z now, we can treat .got.plt as a relro section.
2319 // Without -z now, it is modified after program startup by lazy
2321 bool is_got_plt_relro
= parameters
->options().now();
2322 Output_section_order got_order
= (is_got_plt_relro
2324 : ORDER_RELRO_LAST
);
2325 Output_section_order got_plt_order
= (is_got_plt_relro
2327 : ORDER_NON_RELRO_FIRST
);
2329 // Layout of .got and .got.plt sections.
2330 // .got[0] &_DYNAMIC <-_GLOBAL_OFFSET_TABLE_
2332 // .gotplt[0] reserved for ld.so (&linkmap) <--DT_PLTGOT
2333 // .gotplt[1] reserved for ld.so (resolver)
2334 // .gotplt[2] reserved
2336 // Generate .got section.
2337 this->got_
= new Output_data_got_aarch64
<size
, big_endian
>(symtab
,
2339 layout
->add_output_section_data(".got", elfcpp::SHT_PROGBITS
,
2340 (elfcpp::SHF_ALLOC
| elfcpp::SHF_WRITE
),
2341 this->got_
, got_order
, true);
2342 // The first word of GOT is reserved for the address of .dynamic.
2343 // We put 0 here now. The value will be replaced later in
2344 // Output_data_got_aarch64::do_write.
2345 this->got_
->add_constant(0);
2347 // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT.
2348 // _GLOBAL_OFFSET_TABLE_ value points to the start of the .got section,
2349 // even if there is a .got.plt section.
2350 this->global_offset_table_
=
2351 symtab
->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL
,
2352 Symbol_table::PREDEFINED
,
2354 0, 0, elfcpp::STT_OBJECT
,
2356 elfcpp::STV_HIDDEN
, 0,
2359 // Generate .got.plt section.
2360 this->got_plt_
= new Output_data_space(size
/ 8, "** GOT PLT");
2361 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
2363 | elfcpp::SHF_WRITE
),
2364 this->got_plt_
, got_plt_order
,
2367 // The first three entries are reserved.
2368 this->got_plt_
->set_current_data_size(
2369 AARCH64_GOTPLT_RESERVE_COUNT
* (size
/ 8));
2371 // If there are any IRELATIVE relocations, they get GOT entries
2372 // in .got.plt after the jump slot entries.
2373 this->got_irelative_
= new Output_data_space(size
/ 8,
2374 "** GOT IRELATIVE PLT");
2375 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
2377 | elfcpp::SHF_WRITE
),
2378 this->got_irelative_
,
2382 // If there are any TLSDESC relocations, they get GOT entries in
2383 // .got.plt after the jump slot and IRELATIVE entries.
2384 this->got_tlsdesc_
= new Output_data_got
<size
, big_endian
>();
2385 layout
->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS
,
2387 | elfcpp::SHF_WRITE
),
2392 if (!is_got_plt_relro
)
2394 // Those bytes can go into the relro segment.
2395 layout
->increase_relro(
2396 AARCH64_GOTPLT_RESERVE_COUNT
* (size
/ 8));
2403 // Get the dynamic reloc section, creating it if necessary.
2405 template<int size
, bool big_endian
>
2406 typename Target_aarch64
<size
, big_endian
>::Reloc_section
*
2407 Target_aarch64
<size
, big_endian
>::rela_dyn_section(Layout
* layout
)
2409 if (this->rela_dyn_
== NULL
)
2411 gold_assert(layout
!= NULL
);
2412 this->rela_dyn_
= new Reloc_section(parameters
->options().combreloc());
2413 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2414 elfcpp::SHF_ALLOC
, this->rela_dyn_
,
2415 ORDER_DYNAMIC_RELOCS
, false);
2417 return this->rela_dyn_
;
2420 // Get the section to use for IRELATIVE relocs, creating it if
2421 // necessary. These go in .rela.dyn, but only after all other dynamic
2422 // relocations. They need to follow the other dynamic relocations so
2423 // that they can refer to global variables initialized by those
2426 template<int size
, bool big_endian
>
2427 typename Target_aarch64
<size
, big_endian
>::Reloc_section
*
2428 Target_aarch64
<size
, big_endian
>::rela_irelative_section(Layout
* layout
)
2430 if (this->rela_irelative_
== NULL
)
2432 // Make sure we have already created the dynamic reloc section.
2433 this->rela_dyn_section(layout
);
2434 this->rela_irelative_
= new Reloc_section(false);
2435 layout
->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA
,
2436 elfcpp::SHF_ALLOC
, this->rela_irelative_
,
2437 ORDER_DYNAMIC_RELOCS
, false);
2438 gold_assert(this->rela_dyn_
->output_section()
2439 == this->rela_irelative_
->output_section());
2441 return this->rela_irelative_
;
2445 // do_make_elf_object to override the same function in the base class. We need
2446 // to use a target-specific sub-class of Sized_relobj_file<size, big_endian> to
2447 // store backend specific information. Hence we need to have our own ELF object
2450 template<int size
, bool big_endian
>
2452 Target_aarch64
<size
, big_endian
>::do_make_elf_object(
2453 const std::string
& name
,
2454 Input_file
* input_file
,
2455 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
2457 int et
= ehdr
.get_e_type();
2458 // ET_EXEC files are valid input for --just-symbols/-R,
2459 // and we treat them as relocatable objects.
2460 if (et
== elfcpp::ET_EXEC
&& input_file
->just_symbols())
2461 return Sized_target
<size
, big_endian
>::do_make_elf_object(
2462 name
, input_file
, offset
, ehdr
);
2463 else if (et
== elfcpp::ET_REL
)
2465 AArch64_relobj
<size
, big_endian
>* obj
=
2466 new AArch64_relobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2470 else if (et
== elfcpp::ET_DYN
)
2472 // Keep base implementation.
2473 Sized_dynobj
<size
, big_endian
>* obj
=
2474 new Sized_dynobj
<size
, big_endian
>(name
, input_file
, offset
, ehdr
);
2480 gold_error(_("%s: unsupported ELF file type %d"),
2487 // Scan a relocation for stub generation.
2489 template<int size
, bool big_endian
>
2491 Target_aarch64
<size
, big_endian
>::scan_reloc_for_stub(
2492 const Relocate_info
<size
, big_endian
>* relinfo
,
2493 unsigned int r_type
,
2494 const Sized_symbol
<size
>* gsym
,
2496 const Symbol_value
<size
>* psymval
,
2497 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
,
2500 const AArch64_relobj
<size
, big_endian
>* aarch64_relobj
=
2501 static_cast<AArch64_relobj
<size
, big_endian
>*>(relinfo
->object
);
2503 Symbol_value
<size
> symval
;
2506 const AArch64_reloc_property
* arp
= aarch64_reloc_property_table
->
2507 get_reloc_property(r_type
);
2508 if (gsym
->use_plt_offset(arp
->reference_flags()))
2510 // This uses a PLT, change the symbol value.
2511 symval
.set_output_value(this->plt_section()->address()
2512 + gsym
->plt_offset());
2515 else if (gsym
->is_undefined())
2516 // There is no need to generate a stub symbol is undefined.
2520 // Get the symbol value.
2521 typename Symbol_value
<size
>::Value value
= psymval
->value(aarch64_relobj
, 0);
2523 // Owing to pipelining, the PC relative branches below actually skip
2524 // two instructions when the branch offset is 0.
2525 Address destination
= static_cast<Address
>(-1);
2528 case elfcpp::R_AARCH64_CALL26
:
2529 case elfcpp::R_AARCH64_JUMP26
:
2530 destination
= value
+ addend
;
2536 typename
The_reloc_stub::Stub_type stub_type
= The_reloc_stub::
2537 stub_type_for_reloc(r_type
, address
, destination
);
2538 if (stub_type
== The_reloc_stub::ST_NONE
)
2541 The_stub_table
* stub_table
= aarch64_relobj
->stub_table(relinfo
->data_shndx
);
2542 gold_assert(stub_table
!= NULL
);
2544 The_reloc_stub_key
key(stub_type
, gsym
, aarch64_relobj
, r_sym
, addend
);
2545 The_reloc_stub
* stub
= stub_table
->find_reloc_stub(key
);
2548 stub
= new The_reloc_stub(stub_type
);
2549 stub_table
->add_reloc_stub(stub
, key
);
2551 stub
->set_destination_address(destination
);
2552 } // End of Target_aarch64::scan_reloc_for_stub
2555 // This function scans a relocation section for stub generation.
2556 // The template parameter Relocate must be a class type which provides
2557 // a single function, relocate(), which implements the machine
2558 // specific part of a relocation.
2560 // BIG_ENDIAN is the endianness of the data. SH_TYPE is the section type:
2561 // SHT_REL or SHT_RELA.
2563 // PRELOCS points to the relocation data. RELOC_COUNT is the number
2564 // of relocs. OUTPUT_SECTION is the output section.
2565 // NEEDS_SPECIAL_OFFSET_HANDLING is true if input offsets need to be
2566 // mapped to output offsets.
2568 // VIEW is the section data, VIEW_ADDRESS is its memory address, and
2569 // VIEW_SIZE is the size. These refer to the input section, unless
2570 // NEEDS_SPECIAL_OFFSET_HANDLING is true, in which case they refer to
2571 // the output section.
2573 template<int size
, bool big_endian
>
2574 template<int sh_type
>
2576 Target_aarch64
<size
, big_endian
>::scan_reloc_section_for_stubs(
2577 const Relocate_info
<size
, big_endian
>* relinfo
,
2578 const unsigned char* prelocs
,
2580 Output_section
* /*output_section*/,
2581 bool /*needs_special_offset_handling*/,
2582 const unsigned char* /*view*/,
2583 Address view_address
,
2586 typedef typename Reloc_types
<sh_type
,size
,big_endian
>::Reloc Reltype
;
2588 const int reloc_size
=
2589 Reloc_types
<sh_type
,size
,big_endian
>::reloc_size
;
2590 AArch64_relobj
<size
, big_endian
>* object
=
2591 static_cast<AArch64_relobj
<size
, big_endian
>*>(relinfo
->object
);
2592 unsigned int local_count
= object
->local_symbol_count();
2594 gold::Default_comdat_behavior default_comdat_behavior
;
2595 Comdat_behavior comdat_behavior
= CB_UNDETERMINED
;
2597 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
2599 Reltype
reloc(prelocs
);
2600 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
2601 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
2602 unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
2603 if (r_type
!= elfcpp::R_AARCH64_CALL26
2604 && r_type
!= elfcpp::R_AARCH64_JUMP26
)
2607 section_offset_type offset
=
2608 convert_to_section_size_type(reloc
.get_r_offset());
2611 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
=
2612 reloc
.get_r_addend();
2614 const Sized_symbol
<size
>* sym
;
2615 Symbol_value
<size
> symval
;
2616 const Symbol_value
<size
> *psymval
;
2617 bool is_defined_in_discarded_section
;
2619 if (r_sym
< local_count
)
2622 psymval
= object
->local_symbol(r_sym
);
2624 // If the local symbol belongs to a section we are discarding,
2625 // and that section is a debug section, try to find the
2626 // corresponding kept section and map this symbol to its
2627 // counterpart in the kept section. The symbol must not
2628 // correspond to a section we are folding.
2630 shndx
= psymval
->input_shndx(&is_ordinary
);
2631 is_defined_in_discarded_section
=
2633 && shndx
!= elfcpp::SHN_UNDEF
2634 && !object
->is_section_included(shndx
)
2635 && !relinfo
->symtab
->is_section_folded(object
, shndx
));
2637 // We need to compute the would-be final value of this local
2639 if (!is_defined_in_discarded_section
)
2641 typedef Sized_relobj_file
<size
, big_endian
> ObjType
;
2642 typename
ObjType::Compute_final_local_value_status status
=
2643 object
->compute_final_local_value(r_sym
, psymval
, &symval
,
2645 if (status
== ObjType::CFLV_OK
)
2647 // Currently we cannot handle a branch to a target in
2648 // a merged section. If this is the case, issue an error
2649 // and also free the merge symbol value.
2650 if (!symval
.has_output_value())
2652 const std::string
& section_name
=
2653 object
->section_name(shndx
);
2654 object
->error(_("cannot handle branch to local %u "
2655 "in a merged section %s"),
2656 r_sym
, section_name
.c_str());
2662 // We cannot determine the final value.
2670 gsym
= object
->global_symbol(r_sym
);
2671 gold_assert(gsym
!= NULL
);
2672 if (gsym
->is_forwarder())
2673 gsym
= relinfo
->symtab
->resolve_forwards(gsym
);
2675 sym
= static_cast<const Sized_symbol
<size
>*>(gsym
);
2676 if (sym
->has_symtab_index() && sym
->symtab_index() != -1U)
2677 symval
.set_output_symtab_index(sym
->symtab_index());
2679 symval
.set_no_output_symtab_entry();
2681 // We need to compute the would-be final value of this global
2683 const Symbol_table
* symtab
= relinfo
->symtab
;
2684 const Sized_symbol
<size
>* sized_symbol
=
2685 symtab
->get_sized_symbol
<size
>(gsym
);
2686 Symbol_table::Compute_final_value_status status
;
2687 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
=
2688 symtab
->compute_final_value
<size
>(sized_symbol
, &status
);
2690 // Skip this if the symbol has not output section.
2691 if (status
== Symbol_table::CFVS_NO_OUTPUT_SECTION
)
2693 symval
.set_output_value(value
);
2695 if (gsym
->type() == elfcpp::STT_TLS
)
2696 symval
.set_is_tls_symbol();
2697 else if (gsym
->type() == elfcpp::STT_GNU_IFUNC
)
2698 symval
.set_is_ifunc_symbol();
2701 is_defined_in_discarded_section
=
2702 (gsym
->is_defined_in_discarded_section()
2703 && gsym
->is_undefined());
2707 Symbol_value
<size
> symval2
;
2708 if (is_defined_in_discarded_section
)
2710 if (comdat_behavior
== CB_UNDETERMINED
)
2712 std::string name
= object
->section_name(relinfo
->data_shndx
);
2713 comdat_behavior
= default_comdat_behavior
.get(name
.c_str());
2715 if (comdat_behavior
== CB_PRETEND
)
2718 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
=
2719 object
->map_to_kept_section(shndx
, &found
);
2721 symval2
.set_output_value(value
+ psymval
->input_value());
2723 symval2
.set_output_value(0);
2727 if (comdat_behavior
== CB_WARNING
)
2728 gold_warning_at_location(relinfo
, i
, offset
,
2729 _("relocation refers to discarded "
2731 symval2
.set_output_value(0);
2733 symval2
.set_no_output_symtab_entry();
2737 // If symbol is a section symbol, we don't know the actual type of
2738 // destination. Give up.
2739 if (psymval
->is_section_symbol())
2742 this->scan_reloc_for_stub(relinfo
, r_type
, sym
, r_sym
, psymval
,
2743 addend
, view_address
+ offset
);
2744 } // End of iterating relocs in a section
2745 } // End of Target_aarch64::scan_reloc_section_for_stubs
2748 // Scan an input section for stub generation.
2750 template<int size
, bool big_endian
>
2752 Target_aarch64
<size
, big_endian
>::scan_section_for_stubs(
2753 const Relocate_info
<size
, big_endian
>* relinfo
,
2754 unsigned int sh_type
,
2755 const unsigned char* prelocs
,
2757 Output_section
* output_section
,
2758 bool needs_special_offset_handling
,
2759 const unsigned char* view
,
2760 Address view_address
,
2761 section_size_type view_size
)
2763 gold_assert(sh_type
== elfcpp::SHT_RELA
);
2764 this->scan_reloc_section_for_stubs
<elfcpp::SHT_RELA
>(
2769 needs_special_offset_handling
,
2776 // Relocate a single stub.
2778 template<int size
, bool big_endian
>
2779 void Target_aarch64
<size
, big_endian
>::
2780 relocate_stub(The_reloc_stub
* stub
,
2781 const The_relocate_info
*,
2783 unsigned char* view
,
2787 typedef AArch64_relocate_functions
<size
, big_endian
> The_reloc_functions
;
2788 typedef typename
The_reloc_functions::Status The_reloc_functions_status
;
2789 typedef typename
elfcpp::Swap
<32,big_endian
>::Valtype Insntype
;
2791 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
2792 int insn_number
= stub
->stub_insn_number();
2793 const uint32_t* insns
= stub
->stub_insns();
2794 // Check the insns are really those stub insns.
2795 for (int i
= 0; i
< insn_number
; ++i
)
2797 Insntype insn
= elfcpp::Swap
<32,big_endian
>::readval(ip
+ i
);
2798 gold_assert(((uint32_t)insn
== insns
[i
+1]));
2801 Address dest
= stub
->destination_address();
2803 switch(stub
->stub_type())
2805 case The_reloc_stub::ST_ADRP_BRANCH
:
2807 // 1st reloc is ADR_PREL_PG_HI21
2808 The_reloc_functions_status status
=
2809 The_reloc_functions::adrp(view
, dest
, address
);
2810 // An error should never arise in the above step. If so, please
2811 // check 'aarch64_valid_for_adrp_p'.
2812 gold_assert(status
== The_reloc_functions::STATUS_OKAY
);
2814 // 2nd reloc is ADD_ABS_LO12_NC
2815 const AArch64_reloc_property
* arp
=
2816 aarch64_reloc_property_table
->get_reloc_property(
2817 elfcpp::R_AARCH64_ADD_ABS_LO12_NC
);
2818 gold_assert(arp
!= NULL
);
2819 status
= The_reloc_functions::template
2820 rela_general
<32>(view
+ 4, dest
, 0, arp
);
2821 // An error should never arise, it is an "_NC" relocation.
2822 gold_assert(status
== The_reloc_functions::STATUS_OKAY
);
2826 case The_reloc_stub::ST_LONG_BRANCH_ABS
:
2827 // 1st reloc is R_AARCH64_PREL64, at offset 8
2828 elfcpp::Swap
<64,big_endian
>::writeval(view
+ 8, dest
);
2831 case The_reloc_stub::ST_LONG_BRANCH_PCREL
:
2833 // "PC" calculation is the 2nd insn in the stub.
2834 uint64_t offset
= dest
- (address
+ 4);
2835 // Offset is placed at offset 4 and 5.
2836 elfcpp::Swap
<64,big_endian
>::writeval(view
+ 16, offset
);
2846 // A class to handle the PLT data.
2847 // This is an abstract base class that handles most of the linker details
2848 // but does not know the actual contents of PLT entries. The derived
2849 // classes below fill in those details.
2851 template<int size
, bool big_endian
>
2852 class Output_data_plt_aarch64
: public Output_section_data
2855 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>
2857 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
2859 Output_data_plt_aarch64(Layout
* layout
,
2861 Output_data_got_aarch64
<size
, big_endian
>* got
,
2862 Output_data_space
* got_plt
,
2863 Output_data_space
* got_irelative
)
2864 : Output_section_data(addralign
), tlsdesc_rel_(NULL
),
2865 got_(got
), got_plt_(got_plt
), got_irelative_(got_irelative
),
2866 count_(0), irelative_count_(0), tlsdesc_got_offset_(-1U)
2867 { this->init(layout
); }
2869 // Initialize the PLT section.
2871 init(Layout
* layout
);
2873 // Add an entry to the PLT.
2875 add_entry(Symbol
* gsym
);
2877 // Add the reserved TLSDESC_PLT entry to the PLT.
2879 reserve_tlsdesc_entry(unsigned int got_offset
)
2880 { this->tlsdesc_got_offset_
= got_offset
; }
2882 // Return true if a TLSDESC_PLT entry has been reserved.
2884 has_tlsdesc_entry() const
2885 { return this->tlsdesc_got_offset_
!= -1U; }
2887 // Return the GOT offset for the reserved TLSDESC_PLT entry.
2889 get_tlsdesc_got_offset() const
2890 { return this->tlsdesc_got_offset_
; }
2892 // Return the PLT offset of the reserved TLSDESC_PLT entry.
2894 get_tlsdesc_plt_offset() const
2896 return (this->first_plt_entry_offset() +
2897 (this->count_
+ this->irelative_count_
)
2898 * this->get_plt_entry_size());
2901 // Return the .rela.plt section data.
2904 { return this->rel_
; }
2906 // Return where the TLSDESC relocations should go.
2908 rela_tlsdesc(Layout
*);
2910 // Return where the IRELATIVE relocations should go in the PLT
2913 rela_irelative(Symbol_table
*, Layout
*);
2915 // Return whether we created a section for IRELATIVE relocations.
2917 has_irelative_section() const
2918 { return this->irelative_rel_
!= NULL
; }
2920 // Return the number of PLT entries.
2923 { return this->count_
+ this->irelative_count_
; }
2925 // Return the offset of the first non-reserved PLT entry.
2927 first_plt_entry_offset() const
2928 { return this->do_first_plt_entry_offset(); }
2930 // Return the size of a PLT entry.
2932 get_plt_entry_size() const
2933 { return this->do_get_plt_entry_size(); }
2935 // Return the reserved tlsdesc entry size.
2937 get_plt_tlsdesc_entry_size() const
2938 { return this->do_get_plt_tlsdesc_entry_size(); }
2940 // Return the PLT address to use for a global symbol.
2942 address_for_global(const Symbol
*);
2944 // Return the PLT address to use for a local symbol.
2946 address_for_local(const Relobj
*, unsigned int symndx
);
2949 // Fill in the first PLT entry.
2951 fill_first_plt_entry(unsigned char* pov
,
2952 Address got_address
,
2953 Address plt_address
)
2954 { this->do_fill_first_plt_entry(pov
, got_address
, plt_address
); }
2956 // Fill in a normal PLT entry.
2958 fill_plt_entry(unsigned char* pov
,
2959 Address got_address
,
2960 Address plt_address
,
2961 unsigned int got_offset
,
2962 unsigned int plt_offset
)
2964 this->do_fill_plt_entry(pov
, got_address
, plt_address
,
2965 got_offset
, plt_offset
);
2968 // Fill in the reserved TLSDESC PLT entry.
2970 fill_tlsdesc_entry(unsigned char* pov
,
2971 Address gotplt_address
,
2972 Address plt_address
,
2974 unsigned int tlsdesc_got_offset
,
2975 unsigned int plt_offset
)
2977 this->do_fill_tlsdesc_entry(pov
, gotplt_address
, plt_address
, got_base
,
2978 tlsdesc_got_offset
, plt_offset
);
2981 virtual unsigned int
2982 do_first_plt_entry_offset() const = 0;
2984 virtual unsigned int
2985 do_get_plt_entry_size() const = 0;
2987 virtual unsigned int
2988 do_get_plt_tlsdesc_entry_size() const = 0;
2991 do_fill_first_plt_entry(unsigned char* pov
,
2993 Address plt_addr
) = 0;
2996 do_fill_plt_entry(unsigned char* pov
,
2997 Address got_address
,
2998 Address plt_address
,
2999 unsigned int got_offset
,
3000 unsigned int plt_offset
) = 0;
3003 do_fill_tlsdesc_entry(unsigned char* pov
,
3004 Address gotplt_address
,
3005 Address plt_address
,
3007 unsigned int tlsdesc_got_offset
,
3008 unsigned int plt_offset
) = 0;
3011 do_adjust_output_section(Output_section
* os
);
3013 // Write to a map file.
3015 do_print_to_mapfile(Mapfile
* mapfile
) const
3016 { mapfile
->print_output_data(this, _("** PLT")); }
3019 // Set the final size.
3021 set_final_data_size();
3023 // Write out the PLT data.
3025 do_write(Output_file
*);
3027 // The reloc section.
3028 Reloc_section
* rel_
;
3030 // The TLSDESC relocs, if necessary. These must follow the regular
3032 Reloc_section
* tlsdesc_rel_
;
3034 // The IRELATIVE relocs, if necessary. These must follow the
3035 // regular PLT relocations.
3036 Reloc_section
* irelative_rel_
;
3038 // The .got section.
3039 Output_data_got_aarch64
<size
, big_endian
>* got_
;
3041 // The .got.plt section.
3042 Output_data_space
* got_plt_
;
3044 // The part of the .got.plt section used for IRELATIVE relocs.
3045 Output_data_space
* got_irelative_
;
3047 // The number of PLT entries.
3048 unsigned int count_
;
3050 // Number of PLT entries with R_X86_64_IRELATIVE relocs. These
3051 // follow the regular PLT entries.
3052 unsigned int irelative_count_
;
3054 // GOT offset of the reserved TLSDESC_GOT entry for the lazy trampoline.
3055 // Communicated to the loader via DT_TLSDESC_GOT. The magic value -1
3056 // indicates an offset is not allocated.
3057 unsigned int tlsdesc_got_offset_
;
3060 // Initialize the PLT section.
3062 template<int size
, bool big_endian
>
3064 Output_data_plt_aarch64
<size
, big_endian
>::init(Layout
* layout
)
3066 this->rel_
= new Reloc_section(false);
3067 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3068 elfcpp::SHF_ALLOC
, this->rel_
,
3069 ORDER_DYNAMIC_PLT_RELOCS
, false);
3072 template<int size
, bool big_endian
>
3074 Output_data_plt_aarch64
<size
, big_endian
>::do_adjust_output_section(
3077 os
->set_entsize(this->get_plt_entry_size());
3080 // Add an entry to the PLT.
3082 template<int size
, bool big_endian
>
3084 Output_data_plt_aarch64
<size
, big_endian
>::add_entry(Symbol
* gsym
)
3086 gold_assert(!gsym
->has_plt_offset());
3088 gsym
->set_plt_offset((this->count_
) * this->get_plt_entry_size()
3089 + this->first_plt_entry_offset());
3093 section_offset_type got_offset
= this->got_plt_
->current_data_size();
3095 // Every PLT entry needs a GOT entry which points back to the PLT
3096 // entry (this will be changed by the dynamic linker, normally
3097 // lazily when the function is called).
3098 this->got_plt_
->set_current_data_size(got_offset
+ size
/ 8);
3100 // Every PLT entry needs a reloc.
3101 gsym
->set_needs_dynsym_entry();
3102 this->rel_
->add_global(gsym
, elfcpp::R_AARCH64_JUMP_SLOT
,
3103 this->got_plt_
, got_offset
, 0);
3105 // Note that we don't need to save the symbol. The contents of the
3106 // PLT are independent of which symbols are used. The symbols only
3107 // appear in the relocations.
3110 // Return where the TLSDESC relocations should go, creating it if
3111 // necessary. These follow the JUMP_SLOT relocations.
3113 template<int size
, bool big_endian
>
3114 typename Output_data_plt_aarch64
<size
, big_endian
>::Reloc_section
*
3115 Output_data_plt_aarch64
<size
, big_endian
>::rela_tlsdesc(Layout
* layout
)
3117 if (this->tlsdesc_rel_
== NULL
)
3119 this->tlsdesc_rel_
= new Reloc_section(false);
3120 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3121 elfcpp::SHF_ALLOC
, this->tlsdesc_rel_
,
3122 ORDER_DYNAMIC_PLT_RELOCS
, false);
3123 gold_assert(this->tlsdesc_rel_
->output_section()
3124 == this->rel_
->output_section());
3126 return this->tlsdesc_rel_
;
3129 // Return where the IRELATIVE relocations should go in the PLT. These
3130 // follow the JUMP_SLOT and the TLSDESC relocations.
3132 template<int size
, bool big_endian
>
3133 typename Output_data_plt_aarch64
<size
, big_endian
>::Reloc_section
*
3134 Output_data_plt_aarch64
<size
, big_endian
>::rela_irelative(Symbol_table
* symtab
,
3137 if (this->irelative_rel_
== NULL
)
3139 // Make sure we have a place for the TLSDESC relocations, in
3140 // case we see any later on.
3141 this->rela_tlsdesc(layout
);
3142 this->irelative_rel_
= new Reloc_section(false);
3143 layout
->add_output_section_data(".rela.plt", elfcpp::SHT_RELA
,
3144 elfcpp::SHF_ALLOC
, this->irelative_rel_
,
3145 ORDER_DYNAMIC_PLT_RELOCS
, false);
3146 gold_assert(this->irelative_rel_
->output_section()
3147 == this->rel_
->output_section());
3149 if (parameters
->doing_static_link())
3151 // A statically linked executable will only have a .rela.plt
3152 // section to hold R_AARCH64_IRELATIVE relocs for
3153 // STT_GNU_IFUNC symbols. The library will use these
3154 // symbols to locate the IRELATIVE relocs at program startup
3156 symtab
->define_in_output_data("__rela_iplt_start", NULL
,
3157 Symbol_table::PREDEFINED
,
3158 this->irelative_rel_
, 0, 0,
3159 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
3160 elfcpp::STV_HIDDEN
, 0, false, true);
3161 symtab
->define_in_output_data("__rela_iplt_end", NULL
,
3162 Symbol_table::PREDEFINED
,
3163 this->irelative_rel_
, 0, 0,
3164 elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
3165 elfcpp::STV_HIDDEN
, 0, true, true);
3168 return this->irelative_rel_
;
3171 // Return the PLT address to use for a global symbol.
3173 template<int size
, bool big_endian
>
3175 Output_data_plt_aarch64
<size
, big_endian
>::address_for_global(
3178 uint64_t offset
= 0;
3179 if (gsym
->type() == elfcpp::STT_GNU_IFUNC
3180 && gsym
->can_use_relative_reloc(false))
3181 offset
= (this->first_plt_entry_offset() +
3182 this->count_
* this->get_plt_entry_size());
3183 return this->address() + offset
+ gsym
->plt_offset();
3186 // Return the PLT address to use for a local symbol. These are always
3187 // IRELATIVE relocs.
3189 template<int size
, bool big_endian
>
3191 Output_data_plt_aarch64
<size
, big_endian
>::address_for_local(
3192 const Relobj
* object
,
3195 return (this->address()
3196 + this->first_plt_entry_offset()
3197 + this->count_
* this->get_plt_entry_size()
3198 + object
->local_plt_offset(r_sym
));
3201 // Set the final size.
3203 template<int size
, bool big_endian
>
3205 Output_data_plt_aarch64
<size
, big_endian
>::set_final_data_size()
3207 unsigned int count
= this->count_
+ this->irelative_count_
;
3208 unsigned int extra_size
= 0;
3209 if (this->has_tlsdesc_entry())
3210 extra_size
+= this->get_plt_tlsdesc_entry_size();
3211 this->set_data_size(this->first_plt_entry_offset()
3212 + count
* this->get_plt_entry_size()
3216 template<int size
, bool big_endian
>
3217 class Output_data_plt_aarch64_standard
:
3218 public Output_data_plt_aarch64
<size
, big_endian
>
3221 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3222 Output_data_plt_aarch64_standard(
3224 Output_data_got_aarch64
<size
, big_endian
>* got
,
3225 Output_data_space
* got_plt
,
3226 Output_data_space
* got_irelative
)
3227 : Output_data_plt_aarch64
<size
, big_endian
>(layout
,
3234 // Return the offset of the first non-reserved PLT entry.
3235 virtual unsigned int
3236 do_first_plt_entry_offset() const
3237 { return this->first_plt_entry_size
; }
3239 // Return the size of a PLT entry
3240 virtual unsigned int
3241 do_get_plt_entry_size() const
3242 { return this->plt_entry_size
; }
3244 // Return the size of a tlsdesc entry
3245 virtual unsigned int
3246 do_get_plt_tlsdesc_entry_size() const
3247 { return this->plt_tlsdesc_entry_size
; }
3250 do_fill_first_plt_entry(unsigned char* pov
,
3251 Address got_address
,
3252 Address plt_address
);
3255 do_fill_plt_entry(unsigned char* pov
,
3256 Address got_address
,
3257 Address plt_address
,
3258 unsigned int got_offset
,
3259 unsigned int plt_offset
);
3262 do_fill_tlsdesc_entry(unsigned char* pov
,
3263 Address gotplt_address
,
3264 Address plt_address
,
3266 unsigned int tlsdesc_got_offset
,
3267 unsigned int plt_offset
);
3270 // The size of the first plt entry size.
3271 static const int first_plt_entry_size
= 32;
3272 // The size of the plt entry size.
3273 static const int plt_entry_size
= 16;
3274 // The size of the plt tlsdesc entry size.
3275 static const int plt_tlsdesc_entry_size
= 32;
3276 // Template for the first PLT entry.
3277 static const uint32_t first_plt_entry
[first_plt_entry_size
/ 4];
3278 // Template for subsequent PLT entries.
3279 static const uint32_t plt_entry
[plt_entry_size
/ 4];
3280 // The reserved TLSDESC entry in the PLT for an executable.
3281 static const uint32_t tlsdesc_plt_entry
[plt_tlsdesc_entry_size
/ 4];
3284 // The first entry in the PLT for an executable.
3288 Output_data_plt_aarch64_standard
<32, false>::
3289 first_plt_entry
[first_plt_entry_size
/ 4] =
3291 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
3292 0x90000010, /* adrp x16, PLT_GOT+0x8 */
3293 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */
3294 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */
3295 0xd61f0220, /* br x17 */
3296 0xd503201f, /* nop */
3297 0xd503201f, /* nop */
3298 0xd503201f, /* nop */
3304 Output_data_plt_aarch64_standard
<32, true>::
3305 first_plt_entry
[first_plt_entry_size
/ 4] =
3307 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
3308 0x90000010, /* adrp x16, PLT_GOT+0x8 */
3309 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */
3310 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */
3311 0xd61f0220, /* br x17 */
3312 0xd503201f, /* nop */
3313 0xd503201f, /* nop */
3314 0xd503201f, /* nop */
3320 Output_data_plt_aarch64_standard
<64, false>::
3321 first_plt_entry
[first_plt_entry_size
/ 4] =
3323 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
3324 0x90000010, /* adrp x16, PLT_GOT+16 */
3325 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */
3326 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */
3327 0xd61f0220, /* br x17 */
3328 0xd503201f, /* nop */
3329 0xd503201f, /* nop */
3330 0xd503201f, /* nop */
3336 Output_data_plt_aarch64_standard
<64, true>::
3337 first_plt_entry
[first_plt_entry_size
/ 4] =
3339 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
3340 0x90000010, /* adrp x16, PLT_GOT+16 */
3341 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */
3342 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */
3343 0xd61f0220, /* br x17 */
3344 0xd503201f, /* nop */
3345 0xd503201f, /* nop */
3346 0xd503201f, /* nop */
3352 Output_data_plt_aarch64_standard
<32, false>::
3353 plt_entry
[plt_entry_size
/ 4] =
3355 0x90000010, /* adrp x16, PLTGOT + n * 4 */
3356 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */
3357 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */
3358 0xd61f0220, /* br x17. */
3364 Output_data_plt_aarch64_standard
<32, true>::
3365 plt_entry
[plt_entry_size
/ 4] =
3367 0x90000010, /* adrp x16, PLTGOT + n * 4 */
3368 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */
3369 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */
3370 0xd61f0220, /* br x17. */
3376 Output_data_plt_aarch64_standard
<64, false>::
3377 plt_entry
[plt_entry_size
/ 4] =
3379 0x90000010, /* adrp x16, PLTGOT + n * 8 */
3380 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */
3381 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */
3382 0xd61f0220, /* br x17. */
3388 Output_data_plt_aarch64_standard
<64, true>::
3389 plt_entry
[plt_entry_size
/ 4] =
3391 0x90000010, /* adrp x16, PLTGOT + n * 8 */
3392 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */
3393 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */
3394 0xd61f0220, /* br x17. */
3398 template<int size
, bool big_endian
>
3400 Output_data_plt_aarch64_standard
<size
, big_endian
>::do_fill_first_plt_entry(
3402 Address got_address
,
3403 Address plt_address
)
3405 // PLT0 of the small PLT looks like this in ELF64 -
3406 // stp x16, x30, [sp, #-16]! Save the reloc and lr on stack.
3407 // adrp x16, PLT_GOT + 16 Get the page base of the GOTPLT
3408 // ldr x17, [x16, #:lo12:PLT_GOT+16] Load the address of the
3410 // add x16, x16, #:lo12:PLT_GOT+16 Load the lo12 bits of the
3411 // GOTPLT entry for this.
3413 // PLT0 will be slightly different in ELF32 due to different got entry
3415 memcpy(pov
, this->first_plt_entry
, this->first_plt_entry_size
);
3416 Address gotplt_2nd_ent
= got_address
+ (size
/ 8) * 2;
3418 // Fill in the top 21 bits for this: ADRP x16, PLT_GOT + 8 * 2.
3419 // ADRP: (PG(S+A)-PG(P)) >> 12) & 0x1fffff.
3420 // FIXME: This only works for 64bit
3421 AArch64_relocate_functions
<size
, big_endian
>::adrp(pov
+ 4,
3422 gotplt_2nd_ent
, plt_address
+ 4);
3424 // Fill in R_AARCH64_LDST8_LO12
3425 elfcpp::Swap
<32, big_endian
>::writeval(
3427 ((this->first_plt_entry
[2] & 0xffc003ff)
3428 | ((gotplt_2nd_ent
& 0xff8) << 7)));
3430 // Fill in R_AARCH64_ADD_ABS_LO12
3431 elfcpp::Swap
<32, big_endian
>::writeval(
3433 ((this->first_plt_entry
[3] & 0xffc003ff)
3434 | ((gotplt_2nd_ent
& 0xfff) << 10)));
3438 // Subsequent entries in the PLT for an executable.
3439 // FIXME: This only works for 64bit
3441 template<int size
, bool big_endian
>
3443 Output_data_plt_aarch64_standard
<size
, big_endian
>::do_fill_plt_entry(
3445 Address got_address
,
3446 Address plt_address
,
3447 unsigned int got_offset
,
3448 unsigned int plt_offset
)
3450 memcpy(pov
, this->plt_entry
, this->plt_entry_size
);
3452 Address gotplt_entry_address
= got_address
+ got_offset
;
3453 Address plt_entry_address
= plt_address
+ plt_offset
;
3455 // Fill in R_AARCH64_PCREL_ADR_HI21
3456 AArch64_relocate_functions
<size
, big_endian
>::adrp(
3458 gotplt_entry_address
,
3461 // Fill in R_AARCH64_LDST64_ABS_LO12
3462 elfcpp::Swap
<32, big_endian
>::writeval(
3464 ((this->plt_entry
[1] & 0xffc003ff)
3465 | ((gotplt_entry_address
& 0xff8) << 7)));
3467 // Fill in R_AARCH64_ADD_ABS_LO12
3468 elfcpp::Swap
<32, big_endian
>::writeval(
3470 ((this->plt_entry
[2] & 0xffc003ff)
3471 | ((gotplt_entry_address
& 0xfff) <<10)));
3478 Output_data_plt_aarch64_standard
<32, false>::
3479 tlsdesc_plt_entry
[plt_tlsdesc_entry_size
/ 4] =
3481 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */
3482 0x90000002, /* adrp x2, 0 */
3483 0x90000003, /* adrp x3, 0 */
3484 0xb9400042, /* ldr w2, [w2, #0] */
3485 0x11000063, /* add w3, w3, 0 */
3486 0xd61f0040, /* br x2 */
3487 0xd503201f, /* nop */
3488 0xd503201f, /* nop */
3493 Output_data_plt_aarch64_standard
<32, true>::
3494 tlsdesc_plt_entry
[plt_tlsdesc_entry_size
/ 4] =
3496 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */
3497 0x90000002, /* adrp x2, 0 */
3498 0x90000003, /* adrp x3, 0 */
3499 0xb9400042, /* ldr w2, [w2, #0] */
3500 0x11000063, /* add w3, w3, 0 */
3501 0xd61f0040, /* br x2 */
3502 0xd503201f, /* nop */
3503 0xd503201f, /* nop */
3508 Output_data_plt_aarch64_standard
<64, false>::
3509 tlsdesc_plt_entry
[plt_tlsdesc_entry_size
/ 4] =
3511 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */
3512 0x90000002, /* adrp x2, 0 */
3513 0x90000003, /* adrp x3, 0 */
3514 0xf9400042, /* ldr x2, [x2, #0] */
3515 0x91000063, /* add x3, x3, 0 */
3516 0xd61f0040, /* br x2 */
3517 0xd503201f, /* nop */
3518 0xd503201f, /* nop */
3523 Output_data_plt_aarch64_standard
<64, true>::
3524 tlsdesc_plt_entry
[plt_tlsdesc_entry_size
/ 4] =
3526 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */
3527 0x90000002, /* adrp x2, 0 */
3528 0x90000003, /* adrp x3, 0 */
3529 0xf9400042, /* ldr x2, [x2, #0] */
3530 0x91000063, /* add x3, x3, 0 */
3531 0xd61f0040, /* br x2 */
3532 0xd503201f, /* nop */
3533 0xd503201f, /* nop */
3536 template<int size
, bool big_endian
>
3538 Output_data_plt_aarch64_standard
<size
, big_endian
>::do_fill_tlsdesc_entry(
3540 Address gotplt_address
,
3541 Address plt_address
,
3543 unsigned int tlsdesc_got_offset
,
3544 unsigned int plt_offset
)
3546 memcpy(pov
, tlsdesc_plt_entry
, plt_tlsdesc_entry_size
);
3548 // move DT_TLSDESC_GOT address into x2
3549 // move .got.plt address into x3
3550 Address tlsdesc_got_entry
= got_base
+ tlsdesc_got_offset
;
3551 Address plt_entry_address
= plt_address
+ plt_offset
;
3553 // R_AARCH64_ADR_PREL_PG_HI21
3554 AArch64_relocate_functions
<size
, big_endian
>::adrp(
3557 plt_entry_address
+ 4);
3559 // R_AARCH64_ADR_PREL_PG_HI21
3560 AArch64_relocate_functions
<size
, big_endian
>::adrp(
3563 plt_entry_address
+ 8);
3565 // R_AARCH64_LDST64_ABS_LO12
3566 elfcpp::Swap
<32, big_endian
>::writeval(
3568 ((this->tlsdesc_plt_entry
[3] & 0xffc003ff)
3569 | ((tlsdesc_got_entry
& 0xff8) << 7)));
3571 // R_AARCH64_ADD_ABS_LO12
3572 elfcpp::Swap
<32, big_endian
>::writeval(
3574 ((this->tlsdesc_plt_entry
[4] & 0xffc003ff)
3575 | ((gotplt_address
& 0xfff) << 10)));
3578 // Write out the PLT. This uses the hand-coded instructions above,
3579 // and adjusts them as needed. This is specified by the AMD64 ABI.
3581 template<int size
, bool big_endian
>
3583 Output_data_plt_aarch64
<size
, big_endian
>::do_write(Output_file
* of
)
3585 const off_t offset
= this->offset();
3586 const section_size_type oview_size
=
3587 convert_to_section_size_type(this->data_size());
3588 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
3590 const off_t got_file_offset
= this->got_plt_
->offset();
3591 const section_size_type got_size
=
3592 convert_to_section_size_type(this->got_plt_
->data_size());
3593 unsigned char* const got_view
= of
->get_output_view(got_file_offset
,
3596 unsigned char* pov
= oview
;
3598 // The base address of the .plt section.
3599 typename
elfcpp::Elf_types
<size
>::Elf_Addr plt_address
= this->address();
3600 // The base address of the PLT portion of the .got section.
3601 typename
elfcpp::Elf_types
<size
>::Elf_Addr gotplt_address
3602 = this->got_plt_
->address();
3604 this->fill_first_plt_entry(pov
, gotplt_address
, plt_address
);
3605 pov
+= this->first_plt_entry_offset();
3607 // The first three entries in .got.plt are reserved.
3608 unsigned char* got_pov
= got_view
;
3609 memset(got_pov
, 0, size
/ 8 * AARCH64_GOTPLT_RESERVE_COUNT
);
3610 got_pov
+= (size
/ 8) * AARCH64_GOTPLT_RESERVE_COUNT
;
3612 unsigned int plt_offset
= this->first_plt_entry_offset();
3613 unsigned int got_offset
= (size
/ 8) * AARCH64_GOTPLT_RESERVE_COUNT
;
3614 const unsigned int count
= this->count_
+ this->irelative_count_
;
3615 for (unsigned int plt_index
= 0;
3618 pov
+= this->get_plt_entry_size(),
3619 got_pov
+= size
/ 8,
3620 plt_offset
+= this->get_plt_entry_size(),
3621 got_offset
+= size
/ 8)
3623 // Set and adjust the PLT entry itself.
3624 this->fill_plt_entry(pov
, gotplt_address
, plt_address
,
3625 got_offset
, plt_offset
);
3627 // Set the entry in the GOT, which points to plt0.
3628 elfcpp::Swap
<size
, big_endian
>::writeval(got_pov
, plt_address
);
3631 if (this->has_tlsdesc_entry())
3633 // Set and adjust the reserved TLSDESC PLT entry.
3634 unsigned int tlsdesc_got_offset
= this->get_tlsdesc_got_offset();
3635 // The base address of the .base section.
3636 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_base
=
3637 this->got_
->address();
3638 this->fill_tlsdesc_entry(pov
, gotplt_address
, plt_address
, got_base
,
3639 tlsdesc_got_offset
, plt_offset
);
3640 pov
+= this->get_plt_tlsdesc_entry_size();
3643 gold_assert(static_cast<section_size_type
>(pov
- oview
) == oview_size
);
3644 gold_assert(static_cast<section_size_type
>(got_pov
- got_view
) == got_size
);
3646 of
->write_output_view(offset
, oview_size
, oview
);
3647 of
->write_output_view(got_file_offset
, got_size
, got_view
);
3650 // Telling how to update the immediate field of an instruction.
3651 struct AArch64_howto
3653 // The immediate field mask.
3654 elfcpp::Elf_Xword dst_mask
;
3656 // The offset to apply relocation immediate
3659 // The second part offset, if the immediate field has two parts.
3660 // -1 if the immediate field has only one part.
3664 static const AArch64_howto aarch64_howto
[AArch64_reloc_property::INST_NUM
] =
3666 {0, -1, -1}, // DATA
3667 {0x1fffe0, 5, -1}, // MOVW [20:5]-imm16
3668 {0xffffe0, 5, -1}, // LD [23:5]-imm19
3669 {0x60ffffe0, 29, 5}, // ADR [30:29]-immlo [23:5]-immhi
3670 {0x60ffffe0, 29, 5}, // ADRP [30:29]-immlo [23:5]-immhi
3671 {0x3ffc00, 10, -1}, // ADD [21:10]-imm12
3672 {0x3ffc00, 10, -1}, // LDST [21:10]-imm12
3673 {0x7ffe0, 5, -1}, // TBZNZ [18:5]-imm14
3674 {0xffffe0, 5, -1}, // CONDB [23:5]-imm19
3675 {0x3ffffff, 0, -1}, // B [25:0]-imm26
3676 {0x3ffffff, 0, -1}, // CALL [25:0]-imm26
3679 // AArch64 relocate function class
3681 template<int size
, bool big_endian
>
3682 class AArch64_relocate_functions
3687 STATUS_OKAY
, // No error during relocation.
3688 STATUS_OVERFLOW
, // Relocation overflow.
3689 STATUS_BAD_RELOC
, // Relocation cannot be applied.
3692 typedef AArch64_relocate_functions
<size
, big_endian
> This
;
3693 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
3694 typedef Relocate_info
<size
, big_endian
> The_relocate_info
;
3695 typedef AArch64_relobj
<size
, big_endian
> The_aarch64_relobj
;
3696 typedef Reloc_stub
<size
, big_endian
> The_reloc_stub
;
3697 typedef typename
The_reloc_stub::Stub_type The_reloc_stub_type
;
3698 typedef Stub_table
<size
, big_endian
> The_stub_table
;
3699 typedef elfcpp::Rela
<size
, big_endian
> The_rela
;
3701 // Return the page address of the address.
3702 // Page(address) = address & ~0xFFF
3704 static inline typename
elfcpp::Swap
<size
, big_endian
>::Valtype
3705 Page(Address address
)
3707 return (address
& (~static_cast<Address
>(0xFFF)));
3711 // Update instruction (pointed by view) with selected bits (immed).
3712 // val = (val & ~dst_mask) | (immed << doffset)
3714 template<int valsize
>
3716 update_view(unsigned char* view
,
3717 typename
elfcpp::Swap
<size
, big_endian
>::Valtype immed
,
3718 elfcpp::Elf_Xword doffset
,
3719 elfcpp::Elf_Xword dst_mask
)
3721 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
3722 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
3723 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
3725 // Clear immediate fields.
3727 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
,
3728 static_cast<Valtype
>(val
| (immed
<< doffset
)));
3731 // Update two parts of an instruction (pointed by view) with selected
3732 // bits (immed1 and immed2).
3733 // val = (val & ~dst_mask) | (immed1 << doffset1) | (immed2 << doffset2)
3735 template<int valsize
>
3737 update_view_two_parts(
3738 unsigned char* view
,
3739 typename
elfcpp::Swap
<size
, big_endian
>::Valtype immed1
,
3740 typename
elfcpp::Swap
<size
, big_endian
>::Valtype immed2
,
3741 elfcpp::Elf_Xword doffset1
,
3742 elfcpp::Elf_Xword doffset2
,
3743 elfcpp::Elf_Xword dst_mask
)
3745 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype Valtype
;
3746 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
3747 Valtype val
= elfcpp::Swap
<valsize
, big_endian
>::readval(wv
);
3749 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
,
3750 static_cast<Valtype
>(val
| (immed1
<< doffset1
) |
3751 (immed2
<< doffset2
)));
3754 // Update adr or adrp instruction with [32:12] of X.
3755 // In adr and adrp: [30:29] immlo [23:5] immhi
3758 update_adr(unsigned char* view
,
3759 typename
elfcpp::Swap
<size
, big_endian
>::Valtype x
,
3760 const AArch64_reloc_property
* /* reloc_property */)
3762 elfcpp::Elf_Xword dst_mask
= (0x3 << 29) | (0x7ffff << 5);
3763 typename
elfcpp::Swap
<32, big_endian
>::Valtype immed
=
3764 (x
>> 12) & 0x1fffff;
3765 This::template update_view_two_parts
<32>(
3768 (immed
& 0x1ffffc) >> 2,
3774 // Update movz/movn instruction with bits immed.
3775 // Set instruction to movz if is_movz is true, otherwise set instruction
3778 update_movnz(unsigned char* view
,
3779 typename
elfcpp::Swap
<size
, big_endian
>::Valtype immed
,
3782 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Valtype
;
3783 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
3784 Valtype val
= elfcpp::Swap
<32, big_endian
>::readval(wv
);
3786 const elfcpp::Elf_Xword doffset
=
3787 aarch64_howto
[AArch64_reloc_property::INST_MOVW
].doffset
;
3788 const elfcpp::Elf_Xword dst_mask
=
3789 aarch64_howto
[AArch64_reloc_property::INST_MOVW
].dst_mask
;
3791 // Clear immediate fields and opc code.
3792 val
&= ~(dst_mask
| (0x11 << 29));
3794 // Set instruction to movz or movn.
3795 // movz: [30:29] is 10 movn: [30:29] is 00
3797 val
|= (0x10 << 29);
3799 elfcpp::Swap
<32, big_endian
>::writeval(wv
,
3800 static_cast<Valtype
>(val
| (immed
<< doffset
)));
3805 // Do a simple rela relocation at unaligned addresses.
3807 template<int valsize
>
3808 static inline typename
This::Status
3809 rela_ua(unsigned char* view
,
3810 const Sized_relobj_file
<size
, big_endian
>* object
,
3811 const Symbol_value
<size
>* psymval
,
3812 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3813 const AArch64_reloc_property
* reloc_property
)
3815 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
3817 typename
elfcpp::Elf_types
<size
>::Elf_Addr x
=
3818 psymval
->value(object
, addend
);
3819 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
,
3820 static_cast<Valtype
>(x
));
3821 return (reloc_property
->checkup_x_value(x
)
3823 : This::STATUS_OVERFLOW
);
3826 // Do a simple pc-relative relocation at unaligned addresses.
3828 template<int valsize
>
3829 static inline typename
This::Status
3830 pcrela_ua(unsigned char* view
,
3831 const Sized_relobj_file
<size
, big_endian
>* object
,
3832 const Symbol_value
<size
>* psymval
,
3833 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3835 const AArch64_reloc_property
* reloc_property
)
3837 typedef typename
elfcpp::Swap_unaligned
<valsize
, big_endian
>::Valtype
3839 Address x
= psymval
->value(object
, addend
) - address
;
3840 elfcpp::Swap_unaligned
<valsize
, big_endian
>::writeval(view
,
3841 static_cast<Valtype
>(x
));
3842 return (reloc_property
->checkup_x_value(x
)
3844 : This::STATUS_OVERFLOW
);
3847 // Do a simple rela relocation at aligned addresses.
3849 template<int valsize
>
3850 static inline typename
This::Status
3852 unsigned char* view
,
3853 const Sized_relobj_file
<size
, big_endian
>* object
,
3854 const Symbol_value
<size
>* psymval
,
3855 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3856 const AArch64_reloc_property
* reloc_property
)
3858 typedef typename
elfcpp::Swap
<valsize
, big_endian
>::Valtype
3860 Valtype
* wv
= reinterpret_cast<Valtype
*>(view
);
3861 Address x
= psymval
->value(object
, addend
);
3862 elfcpp::Swap
<valsize
, big_endian
>::writeval(wv
,
3863 static_cast<Valtype
>(x
));
3864 return (reloc_property
->checkup_x_value(x
)
3866 : This::STATUS_OVERFLOW
);
3869 // Do relocate. Update selected bits in text.
3870 // new_val = (val & ~dst_mask) | (immed << doffset)
3872 template<int valsize
>
3873 static inline typename
This::Status
3874 rela_general(unsigned char* view
,
3875 const Sized_relobj_file
<size
, big_endian
>* object
,
3876 const Symbol_value
<size
>* psymval
,
3877 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3878 const AArch64_reloc_property
* reloc_property
)
3880 // Calculate relocation.
3881 Address x
= psymval
->value(object
, addend
);
3883 // Select bits from X.
3884 Address immed
= reloc_property
->select_x_value(x
);
3887 const AArch64_reloc_property::Reloc_inst inst
=
3888 reloc_property
->reloc_inst();
3889 // If it is a data relocation or instruction has 2 parts of immediate
3890 // fields, you should not call rela_general.
3891 gold_assert(aarch64_howto
[inst
].doffset2
== -1 &&
3892 aarch64_howto
[inst
].doffset
!= -1);
3893 This::template update_view
<valsize
>(view
, immed
,
3894 aarch64_howto
[inst
].doffset
,
3895 aarch64_howto
[inst
].dst_mask
);
3897 // Do check overflow or alignment if needed.
3898 return (reloc_property
->checkup_x_value(x
)
3900 : This::STATUS_OVERFLOW
);
3903 // Do relocate. Update selected bits in text.
3904 // new val = (val & ~dst_mask) | (immed << doffset)
3906 template<int valsize
>
3907 static inline typename
This::Status
3909 unsigned char* view
,
3910 typename
elfcpp::Swap
<size
, big_endian
>::Valtype s
,
3911 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3912 const AArch64_reloc_property
* reloc_property
)
3914 // Calculate relocation.
3915 Address x
= s
+ addend
;
3917 // Select bits from X.
3918 Address immed
= reloc_property
->select_x_value(x
);
3921 const AArch64_reloc_property::Reloc_inst inst
=
3922 reloc_property
->reloc_inst();
3923 // If it is a data relocation or instruction has 2 parts of immediate
3924 // fields, you should not call rela_general.
3925 gold_assert(aarch64_howto
[inst
].doffset2
== -1 &&
3926 aarch64_howto
[inst
].doffset
!= -1);
3927 This::template update_view
<valsize
>(view
, immed
,
3928 aarch64_howto
[inst
].doffset
,
3929 aarch64_howto
[inst
].dst_mask
);
3931 // Do check overflow or alignment if needed.
3932 return (reloc_property
->checkup_x_value(x
)
3934 : This::STATUS_OVERFLOW
);
3937 // Do address relative relocate. Update selected bits in text.
3938 // new val = (val & ~dst_mask) | (immed << doffset)
3940 template<int valsize
>
3941 static inline typename
This::Status
3943 unsigned char* view
,
3944 const Sized_relobj_file
<size
, big_endian
>* object
,
3945 const Symbol_value
<size
>* psymval
,
3946 typename
elfcpp::Swap
<size
, big_endian
>::Valtype addend
,
3948 const AArch64_reloc_property
* reloc_property
)
3950 // Calculate relocation.
3951 Address x
= psymval
->value(object
, addend
) - address
;
3953 // Select bits from X.
3954 Address immed
= reloc_property
->select_x_value(x
);
3957 const AArch64_reloc_property::Reloc_inst inst
=
3958 reloc_property
->reloc_inst();
3959 // If it is a data relocation or instruction has 2 parts of immediate
3960 // fields, you should not call pcrela_general.
3961 gold_assert(aarch64_howto
[inst
].doffset2
== -1 &&
3962 aarch64_howto
[inst
].doffset
!= -1);
3963 This::template update_view
<valsize
>(view
, immed
,
3964 aarch64_howto
[inst
].doffset
,
3965 aarch64_howto
[inst
].dst_mask
);
3967 // Do check overflow or alignment if needed.
3968 return (reloc_property
->checkup_x_value(x
)
3970 : This::STATUS_OVERFLOW
);
3973 // Calculate PG(S+A) - PG(address), update adrp instruction.
3974 // R_AARCH64_ADR_PREL_PG_HI21
3976 static inline typename
This::Status
3978 unsigned char* view
,
3982 typename
elfcpp::Swap
<size
, big_endian
>::Valtype x
=
3983 This::Page(sa
) - This::Page(address
);
3984 update_adr(view
, x
, NULL
);
3985 // Check -2^32 <= X < 2^32
3986 return (size
== 64 && Bits
<33>::has_overflow((x
))
3987 ? This::STATUS_OVERFLOW
3988 : This::STATUS_OKAY
);
3991 // Calculate PG(S+A) - PG(address), update adrp instruction.
3992 // R_AARCH64_ADR_PREL_PG_HI21
3994 static inline typename
This::Status
3995 adrp(unsigned char* view
,
3996 const Sized_relobj_file
<size
, big_endian
>* object
,
3997 const Symbol_value
<size
>* psymval
,
4000 const AArch64_reloc_property
* reloc_property
)
4002 Address sa
= psymval
->value(object
, addend
);
4003 typename
elfcpp::Swap
<size
, big_endian
>::Valtype x
=
4004 This::Page(sa
) - This::Page(address
);
4005 update_adr(view
, x
, reloc_property
);
4006 return (reloc_property
->checkup_x_value(x
)
4008 : This::STATUS_OVERFLOW
);
4011 // Update mov[n/z] instruction. Check overflow if needed.
4012 // If X >=0, set the instruction to movz and its immediate value to the
4014 // If X < 0, set the instruction to movn and its immediate value to
4015 // NOT (selected bits of).
4017 static inline typename
This::Status
4018 movnz(unsigned char* view
,
4019 typename
elfcpp::Swap
<size
, big_endian
>::Valtype x
,
4020 const AArch64_reloc_property
* reloc_property
)
4022 // Select bits from X.
4023 Address immed
= reloc_property
->select_x_value(x
);
4024 bool is_movz
= true;
4025 if (static_cast<int64_t>(x
) < 0)
4031 // Update movnz instruction.
4032 update_movnz(view
, immed
, is_movz
);
4034 // Do check overflow or alignment if needed.
4035 return (reloc_property
->checkup_x_value(x
)
4037 : This::STATUS_OVERFLOW
);
4041 maybe_apply_stub(unsigned int,
4042 const The_relocate_info
*,
4046 const Sized_symbol
<size
>*,
4047 const Symbol_value
<size
>*,
4048 const Sized_relobj_file
<size
, big_endian
>*);
4050 }; // End of AArch64_relocate_functions
4053 // For a certain relocation type (usually jump/branch), test to see if the
4054 // destination needs a stub to fulfil. If so, re-route the destination of the
4055 // original instruction to the stub, note, at this time, the stub has already
4058 template<int size
, bool big_endian
>
4060 AArch64_relocate_functions
<size
, big_endian
>::
4061 maybe_apply_stub(unsigned int r_type
,
4062 const The_relocate_info
* relinfo
,
4063 const The_rela
& rela
,
4064 unsigned char* view
,
4066 const Sized_symbol
<size
>* gsym
,
4067 const Symbol_value
<size
>* psymval
,
4068 const Sized_relobj_file
<size
, big_endian
>* object
)
4070 if (parameters
->options().relocatable())
4073 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
= rela
.get_r_addend();
4074 Address branch_target
= psymval
->value(object
, 0) + addend
;
4075 The_reloc_stub_type stub_type
= The_reloc_stub::
4076 stub_type_for_reloc(r_type
, address
, branch_target
);
4077 if (stub_type
== The_reloc_stub::ST_NONE
)
4080 const The_aarch64_relobj
* aarch64_relobj
=
4081 static_cast<const The_aarch64_relobj
*>(object
);
4082 The_stub_table
* stub_table
= aarch64_relobj
->stub_table(relinfo
->data_shndx
);
4083 gold_assert(stub_table
!= NULL
);
4085 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4086 typename
The_reloc_stub::Key
stub_key(stub_type
, gsym
, object
, r_sym
, addend
);
4087 The_reloc_stub
* stub
= stub_table
->find_reloc_stub(stub_key
);
4088 gold_assert(stub
!= NULL
);
4090 Address new_branch_target
= stub_table
->address() + stub
->offset();
4091 typename
elfcpp::Swap
<size
, big_endian
>::Valtype branch_offset
=
4092 new_branch_target
- address
;
4093 const AArch64_reloc_property
* arp
=
4094 aarch64_reloc_property_table
->get_reloc_property(r_type
);
4095 gold_assert(arp
!= NULL
);
4096 This::Status status
= This::template
4097 rela_general
<32>(view
, branch_offset
, 0, arp
);
4098 if (status
!= This::STATUS_OKAY
)
4099 gold_error(_("Stub is too far away, try a smaller value "
4100 "for '--stub-group-size'. For example, 0x2000000."));
4105 // Group input sections for stub generation.
4107 // We group input sections in an output section so that the total size,
4108 // including any padding space due to alignment is smaller than GROUP_SIZE
4109 // unless the only input section in group is bigger than GROUP_SIZE already.
4110 // Then an ARM stub table is created to follow the last input section
4111 // in group. For each group an ARM stub table is created an is placed
4112 // after the last group. If STUB_ALWAYS_AFTER_BRANCH is false, we further
4113 // extend the group after the stub table.
4115 template<int size
, bool big_endian
>
4117 Target_aarch64
<size
, big_endian
>::group_sections(
4119 section_size_type group_size
,
4120 bool stubs_always_after_branch
,
4123 // Group input sections and insert stub table
4124 Layout::Section_list section_list
;
4125 layout
->get_executable_sections(§ion_list
);
4126 for (Layout::Section_list::const_iterator p
= section_list
.begin();
4127 p
!= section_list
.end();
4130 AArch64_output_section
<size
, big_endian
>* output_section
=
4131 static_cast<AArch64_output_section
<size
, big_endian
>*>(*p
);
4132 output_section
->group_sections(group_size
, stubs_always_after_branch
,
4138 // Find the AArch64_input_section object corresponding to the SHNDX-th input
4139 // section of RELOBJ.
4141 template<int size
, bool big_endian
>
4142 AArch64_input_section
<size
, big_endian
>*
4143 Target_aarch64
<size
, big_endian
>::find_aarch64_input_section(
4144 Relobj
* relobj
, unsigned int shndx
) const
4146 Section_id
sid(relobj
, shndx
);
4147 typename
AArch64_input_section_map::const_iterator p
=
4148 this->aarch64_input_section_map_
.find(sid
);
4149 return (p
!= this->aarch64_input_section_map_
.end()) ? p
->second
: NULL
;
4153 // Make a new AArch64_input_section object.
4155 template<int size
, bool big_endian
>
4156 AArch64_input_section
<size
, big_endian
>*
4157 Target_aarch64
<size
, big_endian
>::new_aarch64_input_section(
4158 Relobj
* relobj
, unsigned int shndx
)
4160 Section_id
sid(relobj
, shndx
);
4162 AArch64_input_section
<size
, big_endian
>* input_section
=
4163 new AArch64_input_section
<size
, big_endian
>(relobj
, shndx
);
4164 input_section
->init();
4166 // Register new AArch64_input_section in map for look-up.
4167 std::pair
<typename
AArch64_input_section_map::iterator
,bool> ins
=
4168 this->aarch64_input_section_map_
.insert(
4169 std::make_pair(sid
, input_section
));
4171 // Make sure that it we have not created another AArch64_input_section
4172 // for this input section already.
4173 gold_assert(ins
.second
);
4175 return input_section
;
4179 // Relaxation hook. This is where we do stub generation.
4181 template<int size
, bool big_endian
>
4183 Target_aarch64
<size
, big_endian
>::do_relax(
4185 const Input_objects
* input_objects
,
4186 Symbol_table
* symtab
,
4190 gold_assert(!parameters
->options().relocatable());
4193 section_size_type stub_group_size
=
4194 parameters
->options().stub_group_size();
4195 if (stub_group_size
== 1)
4197 // Leave room for 4096 4-byte stub entries. If we exceed that, then we
4198 // will fail to link. The user will have to relink with an explicit
4199 // group size option.
4200 stub_group_size
= The_reloc_stub::MAX_BRANCH_OFFSET
- 4096 * 4;
4202 group_sections(layout
, stub_group_size
, true, task
);
4206 // If this is not the first pass, addresses and file offsets have
4207 // been reset at this point, set them here.
4208 for (Stub_table_iterator sp
= this->stub_tables_
.begin();
4209 sp
!= this->stub_tables_
.end(); ++sp
)
4211 The_stub_table
* stt
= *sp
;
4212 The_aarch64_input_section
* owner
= stt
->owner();
4213 off_t off
= align_address(owner
->original_size(),
4215 stt
->set_address_and_file_offset(owner
->address() + off
,
4216 owner
->offset() + off
);
4220 // Scan relocs for relocation stubs
4221 for (Input_objects::Relobj_iterator op
= input_objects
->relobj_begin();
4222 op
!= input_objects
->relobj_end();
4225 The_aarch64_relobj
* aarch64_relobj
=
4226 static_cast<The_aarch64_relobj
*>(*op
);
4227 // Lock the object so we can read from it. This is only called
4228 // single-threaded from Layout::finalize, so it is OK to lock.
4229 Task_lock_obj
<Object
> tl(task
, aarch64_relobj
);
4230 aarch64_relobj
->scan_sections_for_stubs(this, symtab
, layout
);
4233 bool any_stub_table_changed
= false;
4234 for (Stub_table_iterator siter
= this->stub_tables_
.begin();
4235 siter
!= this->stub_tables_
.end() && !any_stub_table_changed
; ++siter
)
4237 The_stub_table
* stub_table
= *siter
;
4238 if (stub_table
->update_data_size_changed_p())
4240 The_aarch64_input_section
* owner
= stub_table
->owner();
4241 uint64_t address
= owner
->address();
4242 off_t offset
= owner
->offset();
4243 owner
->reset_address_and_file_offset();
4244 owner
->set_address_and_file_offset(address
, offset
);
4246 any_stub_table_changed
= true;
4250 // Do not continue relaxation.
4251 bool continue_relaxation
= any_stub_table_changed
;
4252 if (!continue_relaxation
)
4253 for (Stub_table_iterator sp
= this->stub_tables_
.begin();
4254 (sp
!= this->stub_tables_
.end());
4256 (*sp
)->finalize_stubs();
4258 return continue_relaxation
;
4262 // Make a new Stub_table.
4264 template<int size
, bool big_endian
>
4265 Stub_table
<size
, big_endian
>*
4266 Target_aarch64
<size
, big_endian
>::new_stub_table(
4267 AArch64_input_section
<size
, big_endian
>* owner
)
4269 Stub_table
<size
, big_endian
>* stub_table
=
4270 new Stub_table
<size
, big_endian
>(owner
);
4271 stub_table
->set_address(align_address(
4272 owner
->address() + owner
->data_size(), 8));
4273 stub_table
->set_file_offset(owner
->offset() + owner
->data_size());
4274 stub_table
->finalize_data_size();
4276 this->stub_tables_
.push_back(stub_table
);
4282 template<int size
, bool big_endian
>
4283 typename
elfcpp::Elf_types
<size
>::Elf_Addr
4284 Target_aarch64
<size
, big_endian
>::do_reloc_addend(
4285 void* arg
, unsigned int r_type
,
4286 typename
elfcpp::Elf_types
<size
>::Elf_Addr
) const
4288 gold_assert(r_type
== elfcpp::R_AARCH64_TLSDESC
);
4289 uintptr_t intarg
= reinterpret_cast<uintptr_t>(arg
);
4290 gold_assert(intarg
< this->tlsdesc_reloc_info_
.size());
4291 const Tlsdesc_info
& ti(this->tlsdesc_reloc_info_
[intarg
]);
4292 const Symbol_value
<size
>* psymval
= ti
.object
->local_symbol(ti
.r_sym
);
4293 gold_assert(psymval
->is_tls_symbol());
4294 // The value of a TLS symbol is the offset in the TLS segment.
4295 return psymval
->value(ti
.object
, 0);
4298 // Return the number of entries in the PLT.
4300 template<int size
, bool big_endian
>
4302 Target_aarch64
<size
, big_endian
>::plt_entry_count() const
4304 if (this->plt_
== NULL
)
4306 return this->plt_
->entry_count();
4309 // Return the offset of the first non-reserved PLT entry.
4311 template<int size
, bool big_endian
>
4313 Target_aarch64
<size
, big_endian
>::first_plt_entry_offset() const
4315 return this->plt_
->first_plt_entry_offset();
4318 // Return the size of each PLT entry.
4320 template<int size
, bool big_endian
>
4322 Target_aarch64
<size
, big_endian
>::plt_entry_size() const
4324 return this->plt_
->get_plt_entry_size();
4327 // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
4329 template<int size
, bool big_endian
>
4331 Target_aarch64
<size
, big_endian
>::define_tls_base_symbol(
4332 Symbol_table
* symtab
, Layout
* layout
)
4334 if (this->tls_base_symbol_defined_
)
4337 Output_segment
* tls_segment
= layout
->tls_segment();
4338 if (tls_segment
!= NULL
)
4340 bool is_exec
= parameters
->options().output_is_executable();
4341 symtab
->define_in_output_segment("_TLS_MODULE_BASE_", NULL
,
4342 Symbol_table::PREDEFINED
,
4346 elfcpp::STV_HIDDEN
, 0,
4348 ? Symbol::SEGMENT_END
4349 : Symbol::SEGMENT_START
),
4352 this->tls_base_symbol_defined_
= true;
4355 // Create the reserved PLT and GOT entries for the TLS descriptor resolver.
4357 template<int size
, bool big_endian
>
4359 Target_aarch64
<size
, big_endian
>::reserve_tlsdesc_entries(
4360 Symbol_table
* symtab
, Layout
* layout
)
4362 if (this->plt_
== NULL
)
4363 this->make_plt_section(symtab
, layout
);
4365 if (!this->plt_
->has_tlsdesc_entry())
4367 // Allocate the TLSDESC_GOT entry.
4368 Output_data_got_aarch64
<size
, big_endian
>* got
=
4369 this->got_section(symtab
, layout
);
4370 unsigned int got_offset
= got
->add_constant(0);
4372 // Allocate the TLSDESC_PLT entry.
4373 this->plt_
->reserve_tlsdesc_entry(got_offset
);
4377 // Create a GOT entry for the TLS module index.
4379 template<int size
, bool big_endian
>
4381 Target_aarch64
<size
, big_endian
>::got_mod_index_entry(
4382 Symbol_table
* symtab
, Layout
* layout
,
4383 Sized_relobj_file
<size
, big_endian
>* object
)
4385 if (this->got_mod_index_offset_
== -1U)
4387 gold_assert(symtab
!= NULL
&& layout
!= NULL
&& object
!= NULL
);
4388 Reloc_section
* rela_dyn
= this->rela_dyn_section(layout
);
4389 Output_data_got_aarch64
<size
, big_endian
>* got
=
4390 this->got_section(symtab
, layout
);
4391 unsigned int got_offset
= got
->add_constant(0);
4392 rela_dyn
->add_local(object
, 0, elfcpp::R_AARCH64_TLS_DTPMOD64
, got
,
4394 got
->add_constant(0);
4395 this->got_mod_index_offset_
= got_offset
;
4397 return this->got_mod_index_offset_
;
4400 // Optimize the TLS relocation type based on what we know about the
4401 // symbol. IS_FINAL is true if the final address of this symbol is
4402 // known at link time.
4404 template<int size
, bool big_endian
>
4405 tls::Tls_optimization
4406 Target_aarch64
<size
, big_endian
>::optimize_tls_reloc(bool is_final
,
4409 // If we are generating a shared library, then we can't do anything
4411 if (parameters
->options().shared())
4412 return tls::TLSOPT_NONE
;
4416 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
4417 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
:
4418 case elfcpp::R_AARCH64_TLSDESC_LD_PREL19
:
4419 case elfcpp::R_AARCH64_TLSDESC_ADR_PREL21
:
4420 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
4421 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
4422 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
4423 case elfcpp::R_AARCH64_TLSDESC_OFF_G1
:
4424 case elfcpp::R_AARCH64_TLSDESC_OFF_G0_NC
:
4425 case elfcpp::R_AARCH64_TLSDESC_LDR
:
4426 case elfcpp::R_AARCH64_TLSDESC_ADD
:
4427 case elfcpp::R_AARCH64_TLSDESC_CALL
:
4428 // These are General-Dynamic which permits fully general TLS
4429 // access. Since we know that we are generating an executable,
4430 // we can convert this to Initial-Exec. If we also know that
4431 // this is a local symbol, we can further switch to Local-Exec.
4433 return tls::TLSOPT_TO_LE
;
4434 return tls::TLSOPT_TO_IE
;
4436 case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
4437 case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
4438 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4439 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4440 case elfcpp::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4441 // These are Initial-Exec relocs which get the thread offset
4442 // from the GOT. If we know that we are linking against the
4443 // local symbol, we can switch to Local-Exec, which links the
4444 // thread offset into the instruction.
4446 return tls::TLSOPT_TO_LE
;
4447 return tls::TLSOPT_NONE
;
4449 case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2
:
4450 case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1
:
4451 case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
4452 case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0
:
4453 case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
4454 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
:
4455 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
:
4456 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
4457 // When we already have Local-Exec, there is nothing further we
4459 return tls::TLSOPT_NONE
;
4466 // Returns true if this relocation type could be that of a function pointer.
4468 template<int size
, bool big_endian
>
4470 Target_aarch64
<size
, big_endian
>::Scan::possible_function_pointer_reloc(
4471 unsigned int r_type
)
4475 case elfcpp::R_AARCH64_ABS64
:
4484 // For safe ICF, scan a relocation for a local symbol to check if it
4485 // corresponds to a function pointer being taken. In that case mark
4486 // the function whose pointer was taken as not foldable.
4488 template<int size
, bool big_endian
>
4490 Target_aarch64
<size
, big_endian
>::Scan::local_reloc_may_be_function_pointer(
4493 Target_aarch64
<size
, big_endian
>* ,
4494 Sized_relobj_file
<size
, big_endian
>* ,
4497 const elfcpp::Rela
<size
, big_endian
>& ,
4498 unsigned int r_type
,
4499 const elfcpp::Sym
<size
, big_endian
>&)
4501 // When building a shared library, do not fold any local symbols as it is
4502 // not possible to distinguish pointer taken versus a call by looking at
4503 // the relocation types.
4504 return (parameters
->options().shared()
4505 || possible_function_pointer_reloc(r_type
));
4508 // For safe ICF, scan a relocation for a global symbol to check if it
4509 // corresponds to a function pointer being taken. In that case mark
4510 // the function whose pointer was taken as not foldable.
4512 template<int size
, bool big_endian
>
4514 Target_aarch64
<size
, big_endian
>::Scan::global_reloc_may_be_function_pointer(
4517 Target_aarch64
<size
, big_endian
>* ,
4518 Sized_relobj_file
<size
, big_endian
>* ,
4521 const elfcpp::Rela
<size
, big_endian
>& ,
4522 unsigned int r_type
,
4525 // When building a shared library, do not fold symbols whose visibility
4526 // is hidden, internal or protected.
4527 return ((parameters
->options().shared()
4528 && (gsym
->visibility() == elfcpp::STV_INTERNAL
4529 || gsym
->visibility() == elfcpp::STV_PROTECTED
4530 || gsym
->visibility() == elfcpp::STV_HIDDEN
))
4531 || possible_function_pointer_reloc(r_type
));
4534 // Report an unsupported relocation against a local symbol.
4536 template<int size
, bool big_endian
>
4538 Target_aarch64
<size
, big_endian
>::Scan::unsupported_reloc_local(
4539 Sized_relobj_file
<size
, big_endian
>* object
,
4540 unsigned int r_type
)
4542 gold_error(_("%s: unsupported reloc %u against local symbol"),
4543 object
->name().c_str(), r_type
);
4546 // We are about to emit a dynamic relocation of type R_TYPE. If the
4547 // dynamic linker does not support it, issue an error.
4549 template<int size
, bool big_endian
>
4551 Target_aarch64
<size
, big_endian
>::Scan::check_non_pic(Relobj
* object
,
4552 unsigned int r_type
)
4554 gold_assert(r_type
!= elfcpp::R_AARCH64_NONE
);
4558 // These are the relocation types supported by glibc for AARCH64.
4559 case elfcpp::R_AARCH64_NONE
:
4560 case elfcpp::R_AARCH64_COPY
:
4561 case elfcpp::R_AARCH64_GLOB_DAT
:
4562 case elfcpp::R_AARCH64_JUMP_SLOT
:
4563 case elfcpp::R_AARCH64_RELATIVE
:
4564 case elfcpp::R_AARCH64_TLS_DTPREL64
:
4565 case elfcpp::R_AARCH64_TLS_DTPMOD64
:
4566 case elfcpp::R_AARCH64_TLS_TPREL64
:
4567 case elfcpp::R_AARCH64_TLSDESC
:
4568 case elfcpp::R_AARCH64_IRELATIVE
:
4569 case elfcpp::R_AARCH64_ABS32
:
4570 case elfcpp::R_AARCH64_ABS64
:
4577 // This prevents us from issuing more than one error per reloc
4578 // section. But we can still wind up issuing more than one
4579 // error per object file.
4580 if (this->issued_non_pic_error_
)
4582 gold_assert(parameters
->options().output_is_position_independent());
4583 object
->error(_("requires unsupported dynamic reloc; "
4584 "recompile with -fPIC"));
4585 this->issued_non_pic_error_
= true;
4589 // Scan a relocation for a local symbol.
4591 template<int size
, bool big_endian
>
4593 Target_aarch64
<size
, big_endian
>::Scan::local(
4594 Symbol_table
* symtab
,
4596 Target_aarch64
<size
, big_endian
>* target
,
4597 Sized_relobj_file
<size
, big_endian
>* object
,
4598 unsigned int data_shndx
,
4599 Output_section
* output_section
,
4600 const elfcpp::Rela
<size
, big_endian
>& rela
,
4601 unsigned int r_type
,
4602 const elfcpp::Sym
<size
, big_endian
>& /* lsym */,
4608 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>
4610 Output_data_got_aarch64
<size
, big_endian
>* got
=
4611 target
->got_section(symtab
, layout
);
4612 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4616 case elfcpp::R_AARCH64_ABS32
:
4617 case elfcpp::R_AARCH64_ABS16
:
4618 if (parameters
->options().output_is_position_independent())
4620 gold_error(_("%s: unsupported reloc %u in pos independent link."),
4621 object
->name().c_str(), r_type
);
4625 case elfcpp::R_AARCH64_ABS64
:
4626 // If building a shared library or pie, we need to mark this as a dynmic
4627 // reloction, so that the dynamic loader can relocate it.
4628 if (parameters
->options().output_is_position_independent())
4630 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4631 rela_dyn
->add_local_relative(object
, r_sym
,
4632 elfcpp::R_AARCH64_RELATIVE
,
4635 rela
.get_r_offset(),
4636 rela
.get_r_addend(),
4637 false /* is ifunc */);
4641 case elfcpp::R_AARCH64_PREL64
:
4642 case elfcpp::R_AARCH64_PREL32
:
4643 case elfcpp::R_AARCH64_PREL16
:
4646 case elfcpp::R_AARCH64_LD_PREL_LO19
: // 273
4647 case elfcpp::R_AARCH64_ADR_PREL_LO21
: // 274
4648 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21
: // 275
4649 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC
: // 276
4650 case elfcpp::R_AARCH64_ADD_ABS_LO12_NC
: // 277
4651 case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC
: // 278
4652 case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC
: // 284
4653 case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC
: // 285
4654 case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC
: // 286
4655 case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC
: // 299
4658 // Control flow, pc-relative. We don't need to do anything for a relative
4659 // addressing relocation against a local symbol if it does not reference
4661 case elfcpp::R_AARCH64_TSTBR14
:
4662 case elfcpp::R_AARCH64_CONDBR19
:
4663 case elfcpp::R_AARCH64_JUMP26
:
4664 case elfcpp::R_AARCH64_CALL26
:
4667 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4668 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4670 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
4671 optimize_tls_reloc(!parameters
->options().shared(), r_type
);
4672 if (tlsopt
== tls::TLSOPT_TO_LE
)
4675 layout
->set_has_static_tls();
4676 // Create a GOT entry for the tp-relative offset.
4677 if (!parameters
->doing_static_link())
4679 got
->add_local_with_rel(object
, r_sym
, GOT_TYPE_TLS_OFFSET
,
4680 target
->rela_dyn_section(layout
),
4681 elfcpp::R_AARCH64_TLS_TPREL64
);
4683 else if (!object
->local_has_got_offset(r_sym
,
4684 GOT_TYPE_TLS_OFFSET
))
4686 got
->add_local(object
, r_sym
, GOT_TYPE_TLS_OFFSET
);
4687 unsigned int got_offset
=
4688 object
->local_got_offset(r_sym
, GOT_TYPE_TLS_OFFSET
);
4689 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
4690 gold_assert(addend
== 0);
4691 got
->add_static_reloc(got_offset
, elfcpp::R_AARCH64_TLS_TPREL64
,
4697 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
4698 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
:
4700 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
4701 optimize_tls_reloc(!parameters
->options().shared(), r_type
);
4702 if (tlsopt
== tls::TLSOPT_TO_LE
)
4704 layout
->set_has_static_tls();
4707 gold_assert(tlsopt
== tls::TLSOPT_NONE
);
4709 got
->add_local_pair_with_rel(object
,r_sym
, data_shndx
,
4711 target
->rela_dyn_section(layout
),
4712 elfcpp::R_AARCH64_TLS_DTPMOD64
);
4716 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
:
4717 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
:
4718 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
4720 layout
->set_has_static_tls();
4721 bool output_is_shared
= parameters
->options().shared();
4722 if (output_is_shared
)
4723 gold_error(_("%s: unsupported TLSLE reloc %u in shared code."),
4724 object
->name().c_str(), r_type
);
4728 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
4729 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
4730 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
4732 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
4733 optimize_tls_reloc(!parameters
->options().shared(), r_type
);
4734 target
->define_tls_base_symbol(symtab
, layout
);
4735 if (tlsopt
== tls::TLSOPT_NONE
)
4737 // Create reserved PLT and GOT entries for the resolver.
4738 target
->reserve_tlsdesc_entries(symtab
, layout
);
4740 // Generate a double GOT entry with an R_AARCH64_TLSDESC reloc.
4741 // The R_AARCH64_TLSDESC reloc is resolved lazily, so the GOT
4742 // entry needs to be in an area in .got.plt, not .got. Call
4743 // got_section to make sure the section has been created.
4744 target
->got_section(symtab
, layout
);
4745 Output_data_got
<size
, big_endian
>* got
=
4746 target
->got_tlsdesc_section();
4747 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
4748 if (!object
->local_has_got_offset(r_sym
, GOT_TYPE_TLS_DESC
))
4750 unsigned int got_offset
= got
->add_constant(0);
4751 got
->add_constant(0);
4752 object
->set_local_got_offset(r_sym
, GOT_TYPE_TLS_DESC
,
4754 Reloc_section
* rt
= target
->rela_tlsdesc_section(layout
);
4755 // We store the arguments we need in a vector, and use
4756 // the index into the vector as the parameter to pass
4757 // to the target specific routines.
4758 uintptr_t intarg
= target
->add_tlsdesc_info(object
, r_sym
);
4759 void* arg
= reinterpret_cast<void*>(intarg
);
4760 rt
->add_target_specific(elfcpp::R_AARCH64_TLSDESC
, arg
,
4761 got
, got_offset
, 0);
4764 else if (tlsopt
!= tls::TLSOPT_TO_LE
)
4765 unsupported_reloc_local(object
, r_type
);
4769 case elfcpp::R_AARCH64_TLSDESC_CALL
:
4773 unsupported_reloc_local(object
, r_type
);
4778 // Report an unsupported relocation against a global symbol.
4780 template<int size
, bool big_endian
>
4782 Target_aarch64
<size
, big_endian
>::Scan::unsupported_reloc_global(
4783 Sized_relobj_file
<size
, big_endian
>* object
,
4784 unsigned int r_type
,
4787 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4788 object
->name().c_str(), r_type
, gsym
->demangled_name().c_str());
4791 template<int size
, bool big_endian
>
4793 Target_aarch64
<size
, big_endian
>::Scan::global(
4794 Symbol_table
* symtab
,
4796 Target_aarch64
<size
, big_endian
>* target
,
4797 Sized_relobj_file
<size
, big_endian
> * object
,
4798 unsigned int data_shndx
,
4799 Output_section
* output_section
,
4800 const elfcpp::Rela
<size
, big_endian
>& rela
,
4801 unsigned int r_type
,
4804 typedef Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>
4806 const AArch64_reloc_property
* arp
=
4807 aarch64_reloc_property_table
->get_reloc_property(r_type
);
4808 gold_assert(arp
!= NULL
);
4812 case elfcpp::R_AARCH64_ABS16
:
4813 case elfcpp::R_AARCH64_ABS32
:
4814 case elfcpp::R_AARCH64_ABS64
:
4816 // Make a PLT entry if necessary.
4817 if (gsym
->needs_plt_entry())
4819 target
->make_plt_entry(symtab
, layout
, gsym
);
4820 // Since this is not a PC-relative relocation, we may be
4821 // taking the address of a function. In that case we need to
4822 // set the entry in the dynamic symbol table to the address of
4824 if (gsym
->is_from_dynobj() && !parameters
->options().shared())
4825 gsym
->set_needs_dynsym_value();
4827 // Make a dynamic relocation if necessary.
4828 if (gsym
->needs_dynamic_reloc(arp
->reference_flags()))
4830 if (!parameters
->options().output_is_position_independent()
4831 && gsym
->may_need_copy_reloc())
4833 target
->copy_reloc(symtab
, layout
, object
,
4834 data_shndx
, output_section
, gsym
, rela
);
4836 else if (r_type
== elfcpp::R_AARCH64_ABS64
4837 && gsym
->can_use_relative_reloc(false))
4839 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4840 rela_dyn
->add_global_relative(gsym
,
4841 elfcpp::R_AARCH64_RELATIVE
,
4845 rela
.get_r_offset(),
4846 rela
.get_r_addend(),
4851 check_non_pic(object
, r_type
);
4852 Output_data_reloc
<elfcpp::SHT_RELA
, true, size
, big_endian
>*
4853 rela_dyn
= target
->rela_dyn_section(layout
);
4854 rela_dyn
->add_global(
4855 gsym
, r_type
, output_section
, object
,
4856 data_shndx
, rela
.get_r_offset(),rela
.get_r_addend());
4862 case elfcpp::R_AARCH64_PREL16
:
4863 case elfcpp::R_AARCH64_PREL32
:
4864 case elfcpp::R_AARCH64_PREL64
:
4865 // This is used to fill the GOT absolute address.
4866 if (gsym
->needs_plt_entry())
4868 target
->make_plt_entry(symtab
, layout
, gsym
);
4872 case elfcpp::R_AARCH64_LD_PREL_LO19
: // 273
4873 case elfcpp::R_AARCH64_ADR_PREL_LO21
: // 274
4874 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21
: // 275
4875 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC
: // 276
4876 case elfcpp::R_AARCH64_ADD_ABS_LO12_NC
: // 277
4877 case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC
: // 278
4878 case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC
: // 284
4879 case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC
: // 285
4880 case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC
: // 286
4881 case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC
: // 299
4883 if (gsym
->needs_plt_entry())
4884 target
->make_plt_entry(symtab
, layout
, gsym
);
4885 // Make a dynamic relocation if necessary.
4886 if (gsym
->needs_dynamic_reloc(arp
->reference_flags()))
4888 if (parameters
->options().output_is_executable()
4889 && gsym
->may_need_copy_reloc())
4891 target
->copy_reloc(symtab
, layout
, object
,
4892 data_shndx
, output_section
, gsym
, rela
);
4898 case elfcpp::R_AARCH64_ADR_GOT_PAGE
:
4899 case elfcpp::R_AARCH64_LD64_GOT_LO12_NC
:
4901 // This pair of relocations is used to access a specific GOT entry.
4902 // Note a GOT entry is an *address* to a symbol.
4903 // The symbol requires a GOT entry
4904 Output_data_got_aarch64
<size
, big_endian
>* got
=
4905 target
->got_section(symtab
, layout
);
4906 if (gsym
->final_value_is_known())
4908 got
->add_global(gsym
, GOT_TYPE_STANDARD
);
4912 Reloc_section
* rela_dyn
= target
->rela_dyn_section(layout
);
4913 if (gsym
->is_from_dynobj()
4914 || gsym
->is_undefined()
4915 || gsym
->is_preemptible()
4916 || (gsym
->visibility() == elfcpp::STV_PROTECTED
4917 && parameters
->options().shared()))
4918 got
->add_global_with_rel(gsym
, GOT_TYPE_STANDARD
,
4919 rela_dyn
, elfcpp::R_AARCH64_GLOB_DAT
);
4922 if (got
->add_global(gsym
, GOT_TYPE_STANDARD
))
4924 rela_dyn
->add_global_relative(
4925 gsym
, elfcpp::R_AARCH64_RELATIVE
,
4927 gsym
->got_offset(GOT_TYPE_STANDARD
),
4936 case elfcpp::R_AARCH64_TSTBR14
:
4937 case elfcpp::R_AARCH64_CONDBR19
:
4938 case elfcpp::R_AARCH64_JUMP26
:
4939 case elfcpp::R_AARCH64_CALL26
:
4941 if (gsym
->final_value_is_known())
4944 if (gsym
->is_defined() &&
4945 !gsym
->is_from_dynobj() &&
4946 !gsym
->is_preemptible())
4949 // Make plt entry for function call.
4950 target
->make_plt_entry(symtab
, layout
, gsym
);
4954 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
4955 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
: // General dynamic
4957 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
4958 optimize_tls_reloc(gsym
->final_value_is_known(), r_type
);
4959 if (tlsopt
== tls::TLSOPT_TO_LE
)
4961 layout
->set_has_static_tls();
4964 gold_assert(tlsopt
== tls::TLSOPT_NONE
);
4967 Output_data_got_aarch64
<size
, big_endian
>* got
=
4968 target
->got_section(symtab
, layout
);
4969 // Create 2 consecutive entries for module index and offset.
4970 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLS_PAIR
,
4971 target
->rela_dyn_section(layout
),
4972 elfcpp::R_AARCH64_TLS_DTPMOD64
,
4973 elfcpp::R_AARCH64_TLS_DTPREL64
);
4977 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4978 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
: // Initial executable
4980 tls::Tls_optimization tlsopt
=Target_aarch64
<size
, big_endian
>::
4981 optimize_tls_reloc(gsym
->final_value_is_known(), r_type
);
4982 if (tlsopt
== tls::TLSOPT_TO_LE
)
4985 layout
->set_has_static_tls();
4986 // Create a GOT entry for the tp-relative offset.
4987 Output_data_got_aarch64
<size
, big_endian
>* got
4988 = target
->got_section(symtab
, layout
);
4989 if (!parameters
->doing_static_link())
4991 got
->add_global_with_rel(
4992 gsym
, GOT_TYPE_TLS_OFFSET
,
4993 target
->rela_dyn_section(layout
),
4994 elfcpp::R_AARCH64_TLS_TPREL64
);
4996 if (!gsym
->has_got_offset(GOT_TYPE_TLS_OFFSET
))
4998 got
->add_global(gsym
, GOT_TYPE_TLS_OFFSET
);
4999 unsigned int got_offset
=
5000 gsym
->got_offset(GOT_TYPE_TLS_OFFSET
);
5001 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
5002 gold_assert(addend
== 0);
5003 got
->add_static_reloc(got_offset
,
5004 elfcpp::R_AARCH64_TLS_TPREL64
, gsym
);
5009 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
:
5010 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
:
5011 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC
: // Local executable
5012 layout
->set_has_static_tls();
5013 if (parameters
->options().shared())
5014 gold_error(_("%s: unsupported TLSLE reloc type %u in shared objects."),
5015 object
->name().c_str(), r_type
);
5018 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
5019 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
5020 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
: // TLS descriptor
5022 target
->define_tls_base_symbol(symtab
, layout
);
5023 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
5024 optimize_tls_reloc(gsym
->final_value_is_known(), r_type
);
5025 if (tlsopt
== tls::TLSOPT_NONE
)
5027 // Create reserved PLT and GOT entries for the resolver.
5028 target
->reserve_tlsdesc_entries(symtab
, layout
);
5030 // Create a double GOT entry with an R_AARCH64_TLSDESC
5031 // relocation. The R_AARCH64_TLSDESC is resolved lazily, so the GOT
5032 // entry needs to be in an area in .got.plt, not .got. Call
5033 // got_section to make sure the section has been created.
5034 target
->got_section(symtab
, layout
);
5035 Output_data_got
<size
, big_endian
>* got
=
5036 target
->got_tlsdesc_section();
5037 Reloc_section
* rt
= target
->rela_tlsdesc_section(layout
);
5038 got
->add_global_pair_with_rel(gsym
, GOT_TYPE_TLS_DESC
, rt
,
5039 elfcpp::R_AARCH64_TLSDESC
, 0);
5041 else if (tlsopt
== tls::TLSOPT_TO_IE
)
5043 // Create a GOT entry for the tp-relative offset.
5044 Output_data_got
<size
, big_endian
>* got
5045 = target
->got_section(symtab
, layout
);
5046 got
->add_global_with_rel(gsym
, GOT_TYPE_TLS_OFFSET
,
5047 target
->rela_dyn_section(layout
),
5048 elfcpp::R_AARCH64_TLS_TPREL64
);
5050 else if (tlsopt
!= tls::TLSOPT_TO_LE
)
5051 unsupported_reloc_global(object
, r_type
, gsym
);
5055 case elfcpp::R_AARCH64_TLSDESC_CALL
:
5059 gold_error(_("%s: unsupported reloc type in global scan"),
5060 aarch64_reloc_property_table
->
5061 reloc_name_in_error_message(r_type
).c_str());
5064 } // End of Scan::global
5067 // Create the PLT section.
5068 template<int size
, bool big_endian
>
5070 Target_aarch64
<size
, big_endian
>::make_plt_section(
5071 Symbol_table
* symtab
, Layout
* layout
)
5073 if (this->plt_
== NULL
)
5075 // Create the GOT section first.
5076 this->got_section(symtab
, layout
);
5078 this->plt_
= this->make_data_plt(layout
, this->got_
, this->got_plt_
,
5079 this->got_irelative_
);
5081 layout
->add_output_section_data(".plt", elfcpp::SHT_PROGBITS
,
5083 | elfcpp::SHF_EXECINSTR
),
5084 this->plt_
, ORDER_PLT
, false);
5086 // Make the sh_info field of .rela.plt point to .plt.
5087 Output_section
* rela_plt_os
= this->plt_
->rela_plt()->output_section();
5088 rela_plt_os
->set_info_section(this->plt_
->output_section());
5092 // Return the section for TLSDESC relocations.
5094 template<int size
, bool big_endian
>
5095 typename Target_aarch64
<size
, big_endian
>::Reloc_section
*
5096 Target_aarch64
<size
, big_endian
>::rela_tlsdesc_section(Layout
* layout
) const
5098 return this->plt_section()->rela_tlsdesc(layout
);
5101 // Create a PLT entry for a global symbol.
5103 template<int size
, bool big_endian
>
5105 Target_aarch64
<size
, big_endian
>::make_plt_entry(
5106 Symbol_table
* symtab
,
5110 if (gsym
->has_plt_offset())
5113 if (this->plt_
== NULL
)
5114 this->make_plt_section(symtab
, layout
);
5116 this->plt_
->add_entry(gsym
);
5119 template<int size
, bool big_endian
>
5121 Target_aarch64
<size
, big_endian
>::gc_process_relocs(
5122 Symbol_table
* symtab
,
5124 Sized_relobj_file
<size
, big_endian
>* object
,
5125 unsigned int data_shndx
,
5126 unsigned int sh_type
,
5127 const unsigned char* prelocs
,
5129 Output_section
* output_section
,
5130 bool needs_special_offset_handling
,
5131 size_t local_symbol_count
,
5132 const unsigned char* plocal_symbols
)
5134 if (sh_type
== elfcpp::SHT_REL
)
5139 gold::gc_process_relocs
<
5141 Target_aarch64
<size
, big_endian
>,
5143 typename Target_aarch64
<size
, big_endian
>::Scan
,
5144 typename Target_aarch64
<size
, big_endian
>::Relocatable_size_for_reloc
>(
5153 needs_special_offset_handling
,
5158 // Scan relocations for a section.
5160 template<int size
, bool big_endian
>
5162 Target_aarch64
<size
, big_endian
>::scan_relocs(
5163 Symbol_table
* symtab
,
5165 Sized_relobj_file
<size
, big_endian
>* object
,
5166 unsigned int data_shndx
,
5167 unsigned int sh_type
,
5168 const unsigned char* prelocs
,
5170 Output_section
* output_section
,
5171 bool needs_special_offset_handling
,
5172 size_t local_symbol_count
,
5173 const unsigned char* plocal_symbols
)
5175 if (sh_type
== elfcpp::SHT_REL
)
5177 gold_error(_("%s: unsupported REL reloc section"),
5178 object
->name().c_str());
5181 gold::scan_relocs
<size
, big_endian
, Target_aarch64
, elfcpp::SHT_RELA
, Scan
>(
5190 needs_special_offset_handling
,
5195 // Return the value to use for a dynamic which requires special
5196 // treatment. This is how we support equality comparisons of function
5197 // pointers across shared library boundaries, as described in the
5198 // processor specific ABI supplement.
5200 template<int size
, bool big_endian
>
5202 Target_aarch64
<size
, big_endian
>::do_dynsym_value(const Symbol
* gsym
) const
5204 gold_assert(gsym
->is_from_dynobj() && gsym
->has_plt_offset());
5205 return this->plt_address_for_global(gsym
);
5209 // Finalize the sections.
5211 template<int size
, bool big_endian
>
5213 Target_aarch64
<size
, big_endian
>::do_finalize_sections(
5215 const Input_objects
*,
5216 Symbol_table
* symtab
)
5218 const Reloc_section
* rel_plt
= (this->plt_
== NULL
5220 : this->plt_
->rela_plt());
5221 layout
->add_target_dynamic_tags(false, this->got_plt_
, rel_plt
,
5222 this->rela_dyn_
, true, false);
5224 // Emit any relocs we saved in an attempt to avoid generating COPY
5226 if (this->copy_relocs_
.any_saved_relocs())
5227 this->copy_relocs_
.emit(this->rela_dyn_section(layout
));
5229 // Fill in some more dynamic tags.
5230 Output_data_dynamic
* const odyn
= layout
->dynamic_data();
5233 if (this->plt_
!= NULL
5234 && this->plt_
->output_section() != NULL
5235 && this->plt_
->has_tlsdesc_entry())
5237 unsigned int plt_offset
= this->plt_
->get_tlsdesc_plt_offset();
5238 unsigned int got_offset
= this->plt_
->get_tlsdesc_got_offset();
5239 this->got_
->finalize_data_size();
5240 odyn
->add_section_plus_offset(elfcpp::DT_TLSDESC_PLT
,
5241 this->plt_
, plt_offset
);
5242 odyn
->add_section_plus_offset(elfcpp::DT_TLSDESC_GOT
,
5243 this->got_
, got_offset
);
5247 // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of
5248 // the .got.plt section.
5249 Symbol
* sym
= this->global_offset_table_
;
5252 uint64_t data_size
= this->got_plt_
->current_data_size();
5253 symtab
->get_sized_symbol
<size
>(sym
)->set_symsize(data_size
);
5255 // If the .got section is more than 0x8000 bytes, we add
5256 // 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16
5257 // bit relocations have a greater chance of working.
5258 if (data_size
>= 0x8000)
5259 symtab
->get_sized_symbol
<size
>(sym
)->set_value(
5260 symtab
->get_sized_symbol
<size
>(sym
)->value() + 0x8000);
5263 if (parameters
->doing_static_link()
5264 && (this->plt_
== NULL
|| !this->plt_
->has_irelative_section()))
5266 // If linking statically, make sure that the __rela_iplt symbols
5267 // were defined if necessary, even if we didn't create a PLT.
5268 static const Define_symbol_in_segment syms
[] =
5271 "__rela_iplt_start", // name
5272 elfcpp::PT_LOAD
, // segment_type
5273 elfcpp::PF_W
, // segment_flags_set
5274 elfcpp::PF(0), // segment_flags_clear
5277 elfcpp::STT_NOTYPE
, // type
5278 elfcpp::STB_GLOBAL
, // binding
5279 elfcpp::STV_HIDDEN
, // visibility
5281 Symbol::SEGMENT_START
, // offset_from_base
5285 "__rela_iplt_end", // name
5286 elfcpp::PT_LOAD
, // segment_type
5287 elfcpp::PF_W
, // segment_flags_set
5288 elfcpp::PF(0), // segment_flags_clear
5291 elfcpp::STT_NOTYPE
, // type
5292 elfcpp::STB_GLOBAL
, // binding
5293 elfcpp::STV_HIDDEN
, // visibility
5295 Symbol::SEGMENT_START
, // offset_from_base
5300 symtab
->define_symbols(layout
, 2, syms
,
5301 layout
->script_options()->saw_sections_clause());
5307 // Perform a relocation.
5309 template<int size
, bool big_endian
>
5311 Target_aarch64
<size
, big_endian
>::Relocate::relocate(
5312 const Relocate_info
<size
, big_endian
>* relinfo
,
5313 Target_aarch64
<size
, big_endian
>* target
,
5316 const elfcpp::Rela
<size
, big_endian
>& rela
,
5317 unsigned int r_type
,
5318 const Sized_symbol
<size
>* gsym
,
5319 const Symbol_value
<size
>* psymval
,
5320 unsigned char* view
,
5321 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
5322 section_size_type
/* view_size */)
5327 typedef AArch64_relocate_functions
<size
, big_endian
> Reloc
;
5329 const AArch64_reloc_property
* reloc_property
=
5330 aarch64_reloc_property_table
->get_reloc_property(r_type
);
5332 if (reloc_property
== NULL
)
5334 std::string reloc_name
=
5335 aarch64_reloc_property_table
->reloc_name_in_error_message(r_type
);
5336 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5337 _("cannot relocate %s in object file"),
5338 reloc_name
.c_str());
5342 const Sized_relobj_file
<size
, big_endian
>* object
= relinfo
->object
;
5344 // Pick the value to use for symbols defined in the PLT.
5345 Symbol_value
<size
> symval
;
5347 && gsym
->use_plt_offset(reloc_property
->reference_flags()))
5349 symval
.set_output_value(target
->plt_address_for_global(gsym
));
5352 else if (gsym
== NULL
&& psymval
->is_ifunc_symbol())
5354 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5355 if (object
->local_has_plt_offset(r_sym
))
5357 symval
.set_output_value(target
->plt_address_for_local(object
, r_sym
));
5362 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
5364 // Get the GOT offset if needed.
5365 // For aarch64, the GOT pointer points to the start of the GOT section.
5366 bool have_got_offset
= false;
5368 int got_base
= (target
->got_
!= NULL
5369 ? (target
->got_
->current_data_size() >= 0x8000
5374 case elfcpp::R_AARCH64_MOVW_GOTOFF_G0
:
5375 case elfcpp::R_AARCH64_MOVW_GOTOFF_G0_NC
:
5376 case elfcpp::R_AARCH64_MOVW_GOTOFF_G1
:
5377 case elfcpp::R_AARCH64_MOVW_GOTOFF_G1_NC
:
5378 case elfcpp::R_AARCH64_MOVW_GOTOFF_G2
:
5379 case elfcpp::R_AARCH64_MOVW_GOTOFF_G2_NC
:
5380 case elfcpp::R_AARCH64_MOVW_GOTOFF_G3
:
5381 case elfcpp::R_AARCH64_GOTREL64
:
5382 case elfcpp::R_AARCH64_GOTREL32
:
5383 case elfcpp::R_AARCH64_GOT_LD_PREL19
:
5384 case elfcpp::R_AARCH64_LD64_GOTOFF_LO15
:
5385 case elfcpp::R_AARCH64_ADR_GOT_PAGE
:
5386 case elfcpp::R_AARCH64_LD64_GOT_LO12_NC
:
5387 case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15
:
5390 gold_assert(gsym
->has_got_offset(GOT_TYPE_STANDARD
));
5391 got_offset
= gsym
->got_offset(GOT_TYPE_STANDARD
) - got_base
;
5395 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5396 gold_assert(object
->local_has_got_offset(r_sym
, GOT_TYPE_STANDARD
));
5397 got_offset
= (object
->local_got_offset(r_sym
, GOT_TYPE_STANDARD
)
5400 have_got_offset
= true;
5407 typename
Reloc::Status reloc_status
= Reloc::STATUS_OKAY
;
5408 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
;
5411 case elfcpp::R_AARCH64_NONE
:
5414 case elfcpp::R_AARCH64_ABS64
:
5415 reloc_status
= Reloc::template rela_ua
<64>(
5416 view
, object
, psymval
, addend
, reloc_property
);
5419 case elfcpp::R_AARCH64_ABS32
:
5420 reloc_status
= Reloc::template rela_ua
<32>(
5421 view
, object
, psymval
, addend
, reloc_property
);
5424 case elfcpp::R_AARCH64_ABS16
:
5425 reloc_status
= Reloc::template rela_ua
<16>(
5426 view
, object
, psymval
, addend
, reloc_property
);
5429 case elfcpp::R_AARCH64_PREL64
:
5430 reloc_status
= Reloc::template pcrela_ua
<64>(
5431 view
, object
, psymval
, addend
, address
, reloc_property
);
5434 case elfcpp::R_AARCH64_PREL32
:
5435 reloc_status
= Reloc::template pcrela_ua
<32>(
5436 view
, object
, psymval
, addend
, address
, reloc_property
);
5439 case elfcpp::R_AARCH64_PREL16
:
5440 reloc_status
= Reloc::template pcrela_ua
<16>(
5441 view
, object
, psymval
, addend
, address
, reloc_property
);
5444 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC
:
5445 case elfcpp::R_AARCH64_ADR_PREL_PG_HI21
:
5446 reloc_status
= Reloc::adrp(view
, object
, psymval
, addend
, address
,
5450 case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC
:
5451 case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC
:
5452 case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC
:
5453 case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC
:
5454 case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC
:
5455 case elfcpp::R_AARCH64_ADD_ABS_LO12_NC
:
5456 reloc_status
= Reloc::template rela_general
<32>(
5457 view
, object
, psymval
, addend
, reloc_property
);
5460 case elfcpp::R_AARCH64_CALL26
:
5461 if (this->skip_call_tls_get_addr_
)
5463 // Double check that the TLSGD insn has been optimized away.
5464 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
5465 Insntype insn
= elfcpp::Swap
<32, big_endian
>::readval(
5466 reinterpret_cast<Insntype
*>(view
));
5467 gold_assert((insn
& 0xff000000) == 0x91000000);
5469 reloc_status
= Reloc::STATUS_OKAY
;
5470 this->skip_call_tls_get_addr_
= false;
5471 // Return false to stop further processing this reloc.
5475 case elfcpp::R_AARCH64_JUMP26
:
5476 if (Reloc::maybe_apply_stub(r_type
, relinfo
, rela
, view
, address
,
5477 gsym
, psymval
, object
))
5480 case elfcpp::R_AARCH64_TSTBR14
:
5481 case elfcpp::R_AARCH64_CONDBR19
:
5482 reloc_status
= Reloc::template pcrela_general
<32>(
5483 view
, object
, psymval
, addend
, address
, reloc_property
);
5486 case elfcpp::R_AARCH64_ADR_GOT_PAGE
:
5487 gold_assert(have_got_offset
);
5488 value
= target
->got_
->address() + got_base
+ got_offset
;
5489 reloc_status
= Reloc::adrp(view
, value
+ addend
, address
);
5492 case elfcpp::R_AARCH64_LD64_GOT_LO12_NC
:
5493 gold_assert(have_got_offset
);
5494 value
= target
->got_
->address() + got_base
+ got_offset
;
5495 reloc_status
= Reloc::template rela_general
<32>(
5496 view
, value
, addend
, reloc_property
);
5499 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
5500 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
:
5501 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5502 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5503 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
:
5504 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
:
5505 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5506 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
5507 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
5508 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
5509 case elfcpp::R_AARCH64_TLSDESC_CALL
:
5510 reloc_status
= relocate_tls(relinfo
, target
, relnum
, rela
, r_type
,
5511 gsym
, psymval
, view
, address
);
5514 // These are dynamic relocations, which are unexpected when linking.
5515 case elfcpp::R_AARCH64_COPY
:
5516 case elfcpp::R_AARCH64_GLOB_DAT
:
5517 case elfcpp::R_AARCH64_JUMP_SLOT
:
5518 case elfcpp::R_AARCH64_RELATIVE
:
5519 case elfcpp::R_AARCH64_IRELATIVE
:
5520 case elfcpp::R_AARCH64_TLS_DTPREL64
:
5521 case elfcpp::R_AARCH64_TLS_DTPMOD64
:
5522 case elfcpp::R_AARCH64_TLS_TPREL64
:
5523 case elfcpp::R_AARCH64_TLSDESC
:
5524 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5525 _("unexpected reloc %u in object file"),
5530 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5531 _("unsupported reloc %s"),
5532 reloc_property
->name().c_str());
5536 // Report any errors.
5537 switch (reloc_status
)
5539 case Reloc::STATUS_OKAY
:
5541 case Reloc::STATUS_OVERFLOW
:
5542 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5543 _("relocation overflow in %s"),
5544 reloc_property
->name().c_str());
5546 case Reloc::STATUS_BAD_RELOC
:
5547 gold_error_at_location(
5550 rela
.get_r_offset(),
5551 _("unexpected opcode while processing relocation %s"),
5552 reloc_property
->name().c_str());
5562 template<int size
, bool big_endian
>
5564 typename AArch64_relocate_functions
<size
, big_endian
>::Status
5565 Target_aarch64
<size
, big_endian
>::Relocate::relocate_tls(
5566 const Relocate_info
<size
, big_endian
>* relinfo
,
5567 Target_aarch64
<size
, big_endian
>* target
,
5569 const elfcpp::Rela
<size
, big_endian
>& rela
,
5570 unsigned int r_type
, const Sized_symbol
<size
>* gsym
,
5571 const Symbol_value
<size
>* psymval
,
5572 unsigned char* view
,
5573 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
5575 typedef AArch64_relocate_functions
<size
, big_endian
> aarch64_reloc_funcs
;
5576 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
5578 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
5579 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
5580 const AArch64_reloc_property
* reloc_property
=
5581 aarch64_reloc_property_table
->get_reloc_property(r_type
);
5582 gold_assert(reloc_property
!= NULL
);
5584 const bool is_final
= (gsym
== NULL
5585 ? !parameters
->options().shared()
5586 : gsym
->final_value_is_known());
5587 tls::Tls_optimization tlsopt
= Target_aarch64
<size
, big_endian
>::
5588 optimize_tls_reloc(is_final
, r_type
);
5590 Sized_relobj_file
<size
, big_endian
>* object
= relinfo
->object
;
5591 int tls_got_offset_type
;
5594 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
5595 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
: // Global-dynamic
5597 if (tlsopt
== tls::TLSOPT_TO_LE
)
5599 if (tls_segment
== NULL
)
5601 gold_assert(parameters
->errors()->error_count() > 0
5602 || issue_undefined_symbol_error(gsym
));
5603 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5605 return tls_gd_to_le(relinfo
, target
, rela
, r_type
, view
,
5608 else if (tlsopt
== tls::TLSOPT_NONE
)
5610 tls_got_offset_type
= GOT_TYPE_TLS_PAIR
;
5611 // Firstly get the address for the got entry.
5612 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_entry_address
;
5615 gold_assert(gsym
->has_got_offset(tls_got_offset_type
));
5616 got_entry_address
= target
->got_
->address() +
5617 gsym
->got_offset(tls_got_offset_type
);
5621 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5623 object
->local_has_got_offset(r_sym
, tls_got_offset_type
));
5624 got_entry_address
= target
->got_
->address() +
5625 object
->local_got_offset(r_sym
, tls_got_offset_type
);
5628 // Relocate the address into adrp/ld, adrp/add pair.
5631 case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21
:
5632 return aarch64_reloc_funcs::adrp(
5633 view
, got_entry_address
+ addend
, address
);
5637 case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
:
5638 return aarch64_reloc_funcs::template rela_general
<32>(
5639 view
, got_entry_address
, addend
, reloc_property
);
5646 gold_error_at_location(relinfo
, relnum
, rela
.get_r_offset(),
5647 _("unsupported gd_to_ie relaxation on %u"),
5652 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5653 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
: // Initial-exec
5655 if (tlsopt
== tls::TLSOPT_TO_LE
)
5657 if (tls_segment
== NULL
)
5659 gold_assert(parameters
->errors()->error_count() > 0
5660 || issue_undefined_symbol_error(gsym
));
5661 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5663 return tls_ie_to_le(relinfo
, target
, rela
, r_type
, view
,
5666 tls_got_offset_type
= GOT_TYPE_TLS_OFFSET
;
5668 // Firstly get the address for the got entry.
5669 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_entry_address
;
5672 gold_assert(gsym
->has_got_offset(tls_got_offset_type
));
5673 got_entry_address
= target
->got_
->address() +
5674 gsym
->got_offset(tls_got_offset_type
);
5678 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5680 object
->local_has_got_offset(r_sym
, tls_got_offset_type
));
5681 got_entry_address
= target
->got_
->address() +
5682 object
->local_got_offset(r_sym
, tls_got_offset_type
);
5684 // Relocate the address into adrp/ld, adrp/add pair.
5687 case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5688 return aarch64_reloc_funcs::adrp(view
, got_entry_address
+ addend
,
5691 case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5692 return aarch64_reloc_funcs::template rela_general
<32>(
5693 view
, got_entry_address
, addend
, reloc_property
);
5698 // We shall never reach here.
5701 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
:
5702 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
:
5703 case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5705 gold_assert(tls_segment
!= NULL
);
5706 AArch64_address value
= psymval
->value(object
, 0);
5708 if (!parameters
->options().shared())
5710 AArch64_address aligned_tcb_size
=
5711 align_address(target
->tcb_size(),
5712 tls_segment
->maximum_alignment());
5713 return aarch64_reloc_funcs::template
5714 rela_general
<32>(view
,
5715 value
+ aligned_tcb_size
,
5720 gold_error(_("%s: unsupported reloc %u "
5721 "in non-static TLSLE mode."),
5722 object
->name().c_str(), r_type
);
5726 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
5727 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
5728 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
5729 case elfcpp::R_AARCH64_TLSDESC_CALL
:
5731 if (tlsopt
== tls::TLSOPT_TO_LE
)
5733 if (tls_segment
== NULL
)
5735 gold_assert(parameters
->errors()->error_count() > 0
5736 || issue_undefined_symbol_error(gsym
));
5737 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5739 return tls_desc_gd_to_le(relinfo
, target
, rela
, r_type
,
5744 tls_got_offset_type
= (tlsopt
== tls::TLSOPT_TO_IE
5745 ? GOT_TYPE_TLS_OFFSET
5746 : GOT_TYPE_TLS_DESC
);
5747 unsigned int got_tlsdesc_offset
= 0;
5748 if (r_type
!= elfcpp::R_AARCH64_TLSDESC_CALL
5749 && tlsopt
== tls::TLSOPT_NONE
)
5751 // We created GOT entries in the .got.tlsdesc portion of the
5752 // .got.plt section, but the offset stored in the symbol is the
5753 // offset within .got.tlsdesc.
5754 got_tlsdesc_offset
= (target
->got_
->data_size()
5755 + target
->got_plt_section()->data_size());
5757 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_entry_address
;
5760 gold_assert(gsym
->has_got_offset(tls_got_offset_type
));
5761 got_entry_address
= target
->got_
->address()
5762 + got_tlsdesc_offset
5763 + gsym
->got_offset(tls_got_offset_type
);
5767 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(rela
.get_r_info());
5769 object
->local_has_got_offset(r_sym
, tls_got_offset_type
));
5770 got_entry_address
= target
->got_
->address() +
5771 got_tlsdesc_offset
+
5772 object
->local_got_offset(r_sym
, tls_got_offset_type
);
5774 if (tlsopt
== tls::TLSOPT_TO_IE
)
5776 if (tls_segment
== NULL
)
5778 gold_assert(parameters
->errors()->error_count() > 0
5779 || issue_undefined_symbol_error(gsym
));
5780 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5782 return tls_desc_gd_to_ie(relinfo
, target
, rela
, r_type
,
5783 view
, psymval
, got_entry_address
,
5787 // Now do tlsdesc relocation.
5790 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
5791 return aarch64_reloc_funcs::adrp(view
,
5792 got_entry_address
+ addend
,
5795 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
5796 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
5797 return aarch64_reloc_funcs::template rela_general
<32>(
5798 view
, got_entry_address
, addend
, reloc_property
);
5800 case elfcpp::R_AARCH64_TLSDESC_CALL
:
5801 return aarch64_reloc_funcs::STATUS_OKAY
;
5811 gold_error(_("%s: unsupported TLS reloc %u."),
5812 object
->name().c_str(), r_type
);
5814 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5815 } // End of relocate_tls.
5818 template<int size
, bool big_endian
>
5820 typename AArch64_relocate_functions
<size
, big_endian
>::Status
5821 Target_aarch64
<size
, big_endian
>::Relocate::tls_gd_to_le(
5822 const Relocate_info
<size
, big_endian
>* relinfo
,
5823 Target_aarch64
<size
, big_endian
>* target
,
5824 const elfcpp::Rela
<size
, big_endian
>& rela
,
5825 unsigned int r_type
,
5826 unsigned char* view
,
5827 const Symbol_value
<size
>* psymval
)
5829 typedef AArch64_relocate_functions
<size
, big_endian
> aarch64_reloc_funcs
;
5830 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
5831 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
5833 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
5834 Insntype insn1
= elfcpp::Swap
<32, big_endian
>::readval(ip
);
5835 Insntype insn2
= elfcpp::Swap
<32, big_endian
>::readval(ip
+ 1);
5836 Insntype insn3
= elfcpp::Swap
<32, big_endian
>::readval(ip
+ 2);
5838 if (r_type
== elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC
)
5840 // This is the 2nd relocs, optimization should already have been
5842 gold_assert((insn1
& 0xfff00000) == 0x91400000);
5843 return aarch64_reloc_funcs::STATUS_OKAY
;
5846 // The original sequence is -
5847 // 90000000 adrp x0, 0 <main>
5848 // 91000000 add x0, x0, #0x0
5849 // 94000000 bl 0 <__tls_get_addr>
5850 // optimized to sequence -
5851 // d53bd040 mrs x0, tpidr_el0
5852 // 91400000 add x0, x0, #0x0, lsl #12
5853 // 91000000 add x0, x0, #0x0
5855 // Unlike tls_ie_to_le, we change the 3 insns in one function call when we
5856 // encounter the first relocation "R_AARCH64_TLSGD_ADR_PAGE21". Because we
5857 // have to change "bl tls_get_addr", which does not have a corresponding tls
5858 // relocation type. So before proceeding, we need to make sure compiler
5859 // does not change the sequence.
5860 if(!(insn1
== 0x90000000 // adrp x0,0
5861 && insn2
== 0x91000000 // add x0, x0, #0x0
5862 && insn3
== 0x94000000)) // bl 0
5864 // Ideally we should give up gd_to_le relaxation and do gd access.
5865 // However the gd_to_le relaxation decision has been made early
5866 // in the scan stage, where we did not allocate any GOT entry for
5867 // this symbol. Therefore we have to exit and report error now.
5868 gold_error(_("unexpected reloc insn sequence while relaxing "
5869 "tls gd to le for reloc %u."), r_type
);
5870 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5874 insn1
= 0xd53bd040; // mrs x0, tpidr_el0
5875 insn2
= 0x91400000; // add x0, x0, #0x0, lsl #12
5876 insn3
= 0x91000000; // add x0, x0, #0x0
5877 elfcpp::Swap
<32, big_endian
>::writeval(ip
, insn1
);
5878 elfcpp::Swap
<32, big_endian
>::writeval(ip
+ 1, insn2
);
5879 elfcpp::Swap
<32, big_endian
>::writeval(ip
+ 2, insn3
);
5881 // Calculate tprel value.
5882 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
5883 gold_assert(tls_segment
!= NULL
);
5884 AArch64_address value
= psymval
->value(relinfo
->object
, 0);
5885 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
5886 AArch64_address aligned_tcb_size
=
5887 align_address(target
->tcb_size(), tls_segment
->maximum_alignment());
5888 AArch64_address x
= value
+ aligned_tcb_size
;
5890 // After new insns are written, apply TLSLE relocs.
5891 const AArch64_reloc_property
* rp1
=
5892 aarch64_reloc_property_table
->get_reloc_property(
5893 elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12
);
5894 const AArch64_reloc_property
* rp2
=
5895 aarch64_reloc_property_table
->get_reloc_property(
5896 elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12
);
5897 gold_assert(rp1
!= NULL
&& rp2
!= NULL
);
5899 typename
aarch64_reloc_funcs::Status s1
=
5900 aarch64_reloc_funcs::template rela_general
<32>(view
+ 4,
5904 if (s1
!= aarch64_reloc_funcs::STATUS_OKAY
)
5907 typename
aarch64_reloc_funcs::Status s2
=
5908 aarch64_reloc_funcs::template rela_general
<32>(view
+ 8,
5913 this->skip_call_tls_get_addr_
= true;
5915 } // End of tls_gd_to_le
5918 template<int size
, bool big_endian
>
5920 typename AArch64_relocate_functions
<size
, big_endian
>::Status
5921 Target_aarch64
<size
, big_endian
>::Relocate::tls_ie_to_le(
5922 const Relocate_info
<size
, big_endian
>* relinfo
,
5923 Target_aarch64
<size
, big_endian
>* target
,
5924 const elfcpp::Rela
<size
, big_endian
>& rela
,
5925 unsigned int r_type
,
5926 unsigned char* view
,
5927 const Symbol_value
<size
>* psymval
)
5929 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
5930 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
5931 typedef AArch64_relocate_functions
<size
, big_endian
> aarch64_reloc_funcs
;
5933 AArch64_address value
= psymval
->value(relinfo
->object
, 0);
5934 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
5935 AArch64_address aligned_tcb_address
=
5936 align_address(target
->tcb_size(), tls_segment
->maximum_alignment());
5937 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
5938 AArch64_address x
= value
+ addend
+ aligned_tcb_address
;
5939 // "x" is the offset to tp, we can only do this if x is within
5940 // range [0, 2^32-1]
5941 if (!(size
== 32 || (size
== 64 && (static_cast<uint64_t>(x
) >> 32) == 0)))
5943 gold_error(_("TLS variable referred by reloc %u is too far from TP."),
5945 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
5948 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
5949 Insntype insn
= elfcpp::Swap
<32, big_endian
>::readval(ip
);
5952 if (r_type
== elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
)
5955 regno
= (insn
& 0x1f);
5956 newinsn
= (0xd2a00000 | regno
) | (((x
>> 16) & 0xffff) << 5);
5958 else if (r_type
== elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
)
5961 regno
= (insn
& 0x1f);
5962 gold_assert(regno
== ((insn
>> 5) & 0x1f));
5963 newinsn
= (0xf2800000 | regno
) | ((x
& 0xffff) << 5);
5968 elfcpp::Swap
<32, big_endian
>::writeval(ip
, newinsn
);
5969 return aarch64_reloc_funcs::STATUS_OKAY
;
5970 } // End of tls_ie_to_le
5973 template<int size
, bool big_endian
>
5975 typename AArch64_relocate_functions
<size
, big_endian
>::Status
5976 Target_aarch64
<size
, big_endian
>::Relocate::tls_desc_gd_to_le(
5977 const Relocate_info
<size
, big_endian
>* relinfo
,
5978 Target_aarch64
<size
, big_endian
>* target
,
5979 const elfcpp::Rela
<size
, big_endian
>& rela
,
5980 unsigned int r_type
,
5981 unsigned char* view
,
5982 const Symbol_value
<size
>* psymval
)
5984 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr AArch64_address
;
5985 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
5986 typedef AArch64_relocate_functions
<size
, big_endian
> aarch64_reloc_funcs
;
5988 // TLSDESC-GD sequence is like:
5989 // adrp x0, :tlsdesc:v1
5990 // ldr x1, [x0, #:tlsdesc_lo12:v1]
5991 // add x0, x0, :tlsdesc_lo12:v1
5994 // After desc_gd_to_le optimization, the sequence will be like:
5995 // movz x0, #0x0, lsl #16
6000 // Calculate tprel value.
6001 Output_segment
* tls_segment
= relinfo
->layout
->tls_segment();
6002 gold_assert(tls_segment
!= NULL
);
6003 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
6004 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
6005 AArch64_address value
= psymval
->value(relinfo
->object
, addend
);
6006 AArch64_address aligned_tcb_size
=
6007 align_address(target
->tcb_size(), tls_segment
->maximum_alignment());
6008 AArch64_address x
= value
+ aligned_tcb_size
;
6009 // x is the offset to tp, we can only do this if x is within range
6010 // [0, 2^32-1]. If x is out of range, fail and exit.
6011 if (size
== 64 && (static_cast<uint64_t>(x
) >> 32) != 0)
6013 gold_error(_("TLS variable referred by reloc %u is too far from TP. "
6014 "We Can't do gd_to_le relaxation.\n"), r_type
);
6015 return aarch64_reloc_funcs::STATUS_BAD_RELOC
;
6020 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
6021 case elfcpp::R_AARCH64_TLSDESC_CALL
:
6023 newinsn
= 0xd503201f;
6026 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
6028 newinsn
= 0xd2a00000 | (((x
>> 16) & 0xffff) << 5);
6031 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
6033 newinsn
= 0xf2800000 | ((x
& 0xffff) << 5);
6037 gold_error(_("unsupported tlsdesc gd_to_le optimization on reloc %u"),
6041 elfcpp::Swap
<32, big_endian
>::writeval(ip
, newinsn
);
6042 return aarch64_reloc_funcs::STATUS_OKAY
;
6043 } // End of tls_desc_gd_to_le
6046 template<int size
, bool big_endian
>
6048 typename AArch64_relocate_functions
<size
, big_endian
>::Status
6049 Target_aarch64
<size
, big_endian
>::Relocate::tls_desc_gd_to_ie(
6050 const Relocate_info
<size
, big_endian
>* /* relinfo */,
6051 Target_aarch64
<size
, big_endian
>* /* target */,
6052 const elfcpp::Rela
<size
, big_endian
>& rela
,
6053 unsigned int r_type
,
6054 unsigned char* view
,
6055 const Symbol_value
<size
>* /* psymval */,
6056 typename
elfcpp::Elf_types
<size
>::Elf_Addr got_entry_address
,
6057 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
)
6059 typedef typename
elfcpp::Swap
<32, big_endian
>::Valtype Insntype
;
6060 typedef AArch64_relocate_functions
<size
, big_endian
> aarch64_reloc_funcs
;
6062 // TLSDESC-GD sequence is like:
6063 // adrp x0, :tlsdesc:v1
6064 // ldr x1, [x0, #:tlsdesc_lo12:v1]
6065 // add x0, x0, :tlsdesc_lo12:v1
6068 // After desc_gd_to_ie optimization, the sequence will be like:
6069 // adrp x0, :tlsie:v1
6070 // ldr x0, [x0, :tlsie_lo12:v1]
6074 Insntype
* ip
= reinterpret_cast<Insntype
*>(view
);
6075 const elfcpp::Elf_Xword addend
= rela
.get_r_addend();
6079 case elfcpp::R_AARCH64_TLSDESC_ADD_LO12
:
6080 case elfcpp::R_AARCH64_TLSDESC_CALL
:
6082 newinsn
= 0xd503201f;
6083 elfcpp::Swap
<32, big_endian
>::writeval(ip
, newinsn
);
6086 case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21
:
6088 return aarch64_reloc_funcs::adrp(view
, got_entry_address
+ addend
,
6093 case elfcpp::R_AARCH64_TLSDESC_LD64_LO12
:
6095 const AArch64_reloc_property
* reloc_property
=
6096 aarch64_reloc_property_table
->get_reloc_property(
6097 elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
);
6098 return aarch64_reloc_funcs::template rela_general
<32>(
6099 view
, got_entry_address
, addend
, reloc_property
);
6104 gold_error(_("Don't support tlsdesc gd_to_ie optimization on reloc %u"),
6108 return aarch64_reloc_funcs::STATUS_OKAY
;
6109 } // End of tls_desc_gd_to_ie
6111 // Relocate section data.
6113 template<int size
, bool big_endian
>
6115 Target_aarch64
<size
, big_endian
>::relocate_section(
6116 const Relocate_info
<size
, big_endian
>* relinfo
,
6117 unsigned int sh_type
,
6118 const unsigned char* prelocs
,
6120 Output_section
* output_section
,
6121 bool needs_special_offset_handling
,
6122 unsigned char* view
,
6123 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
6124 section_size_type view_size
,
6125 const Reloc_symbol_changes
* reloc_symbol_changes
)
6127 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6128 typedef typename Target_aarch64
<size
, big_endian
>::Relocate AArch64_relocate
;
6129 gold::relocate_section
<size
, big_endian
, Target_aarch64
, elfcpp::SHT_RELA
,
6130 AArch64_relocate
, gold::Default_comdat_behavior
>(
6136 needs_special_offset_handling
,
6140 reloc_symbol_changes
);
6143 // Return the size of a relocation while scanning during a relocatable
6146 template<int size
, bool big_endian
>
6148 Target_aarch64
<size
, big_endian
>::Relocatable_size_for_reloc::
6153 // We will never support SHT_REL relocations.
6158 // Scan the relocs during a relocatable link.
6160 template<int size
, bool big_endian
>
6162 Target_aarch64
<size
, big_endian
>::scan_relocatable_relocs(
6163 Symbol_table
* symtab
,
6165 Sized_relobj_file
<size
, big_endian
>* object
,
6166 unsigned int data_shndx
,
6167 unsigned int sh_type
,
6168 const unsigned char* prelocs
,
6170 Output_section
* output_section
,
6171 bool needs_special_offset_handling
,
6172 size_t local_symbol_count
,
6173 const unsigned char* plocal_symbols
,
6174 Relocatable_relocs
* rr
)
6176 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6178 typedef gold::Default_scan_relocatable_relocs
<elfcpp::SHT_RELA
,
6179 Relocatable_size_for_reloc
> Scan_relocatable_relocs
;
6181 gold::scan_relocatable_relocs
<size
, big_endian
, elfcpp::SHT_RELA
,
6182 Scan_relocatable_relocs
>(
6190 needs_special_offset_handling
,
6196 // Relocate a section during a relocatable link.
6198 template<int size
, bool big_endian
>
6200 Target_aarch64
<size
, big_endian
>::relocate_relocs(
6201 const Relocate_info
<size
, big_endian
>* relinfo
,
6202 unsigned int sh_type
,
6203 const unsigned char* prelocs
,
6205 Output_section
* output_section
,
6206 typename
elfcpp::Elf_types
<size
>::Elf_Off offset_in_output_section
,
6207 const Relocatable_relocs
* rr
,
6208 unsigned char* view
,
6209 typename
elfcpp::Elf_types
<size
>::Elf_Addr view_address
,
6210 section_size_type view_size
,
6211 unsigned char* reloc_view
,
6212 section_size_type reloc_view_size
)
6214 gold_assert(sh_type
== elfcpp::SHT_RELA
);
6216 gold::relocate_relocs
<size
, big_endian
, elfcpp::SHT_RELA
>(
6221 offset_in_output_section
,
6231 // The selector for aarch64 object files.
6233 template<int size
, bool big_endian
>
6234 class Target_selector_aarch64
: public Target_selector
6237 Target_selector_aarch64();
6240 do_instantiate_target()
6241 { return new Target_aarch64
<size
, big_endian
>(); }
6245 Target_selector_aarch64
<32, true>::Target_selector_aarch64()
6246 : Target_selector(elfcpp::EM_AARCH64
, 32, true,
6247 "elf32-bigaarch64", "aarch64_elf32_be_vec")
6251 Target_selector_aarch64
<32, false>::Target_selector_aarch64()
6252 : Target_selector(elfcpp::EM_AARCH64
, 32, false,
6253 "elf32-littleaarch64", "aarch64_elf32_le_vec")
6257 Target_selector_aarch64
<64, true>::Target_selector_aarch64()
6258 : Target_selector(elfcpp::EM_AARCH64
, 64, true,
6259 "elf64-bigaarch64", "aarch64_elf64_be_vec")
6263 Target_selector_aarch64
<64, false>::Target_selector_aarch64()
6264 : Target_selector(elfcpp::EM_AARCH64
, 64, false,
6265 "elf64-littleaarch64", "aarch64_elf64_le_vec")
6268 Target_selector_aarch64
<32, true> target_selector_aarch64elf32b
;
6269 Target_selector_aarch64
<32, false> target_selector_aarch64elf32
;
6270 Target_selector_aarch64
<64, true> target_selector_aarch64elfb
;
6271 Target_selector_aarch64
<64, false> target_selector_aarch64elf
;
6273 } // End anonymous namespace.