1 // inremental.h -- incremental linking support for gold -*- C++ -*-
3 // Copyright 2009, 2010 Free Software Foundation, Inc.
4 // Written by Mikolaj Zalewski <mikolajz@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.
23 #ifndef GOLD_INCREMENTAL_H
24 #define GOLD_INCREMENTAL_H
29 #include "elfcpp_file.h"
30 #include "stringpool.h"
31 #include "workqueue.h"
40 class Incremental_inputs_checker
;
41 class Incremental_script_entry
;
42 class Incremental_object_entry
;
43 class Incremental_archive_entry
;
44 class Incremental_inputs
;
47 // Incremental input type as stored in .gnu_incremental_inputs.
49 enum Incremental_input_type
51 INCREMENTAL_INPUT_OBJECT
= 1,
52 INCREMENTAL_INPUT_ARCHIVE_MEMBER
= 2,
53 INCREMENTAL_INPUT_ARCHIVE
= 3,
54 INCREMENTAL_INPUT_SHARED_LIBRARY
= 4,
55 INCREMENTAL_INPUT_SCRIPT
= 5
58 // An object representing the ELF file we edit during an incremental build.
59 // Similar to Object or Dynobj, but operates on Output_file and contains
60 // method specific to file edition (TBD). This is the abstract parent class
61 // implemented in Sized_incremental_binary<size, big_endian> for a specific
62 // endianness and size.
64 class Incremental_binary
67 Incremental_binary(Output_file
* output
, Target
* target
)
68 : output_(output
), target_(target
)
75 // Functions and types for the elfcpp::Elf_file interface. This
76 // permit us to use Incremental_binary as the File template parameter for
79 // The View class is returned by view. It must support a single
80 // method, data(). This is trivial, because Output_file::get_output_view
85 View(const unsigned char* p
)
94 const unsigned char* p_
;
99 view(off_t file_offset
, section_size_type data_size
)
100 { return View(this->output_
->get_input_view(file_offset
, data_size
)); }
102 // A location in the file.
108 Location(off_t fo
, section_size_type ds
)
109 : file_offset(fo
), data_size(ds
)
113 : file_offset(0), data_size(0)
117 // Get a View given a Location.
120 { return View(this->view(loc
.file_offset
, loc
.data_size
)); }
124 error(const char* format
, ...) const ATTRIBUTE_PRINTF_2
;
126 // Find the .gnu_incremental_inputs and related sections. It selects the
127 // first section of type SHT_GNU_INCREMENTAL_INPUTS,
128 // SHT_GNU_INCRMENTAL_SYMTAB, and SHT_GNU_INCREMENTAL_RELOCS.
129 // Returns false if the sections are not found.
131 find_incremental_inputs_sections(unsigned int* p_inputs_shndx
,
132 unsigned int* p_symtab_shndx
,
133 unsigned int* p_relocs_shndx
,
134 unsigned int* p_got_plt_shndx
,
135 unsigned int* p_strtab_shndx
)
137 return do_find_incremental_inputs_sections(p_inputs_shndx
, p_symtab_shndx
,
138 p_relocs_shndx
, p_got_plt_shndx
,
142 // Check the .gnu_incremental_inputs section to see whether an incremental
143 // build is possible.
144 // TODO: on success, should report what files needs to be rebuilt.
145 // INCREMENTAL_INPUTS is used to read the canonical form of the command line
146 // and read the input arguments. TODO: for items that don't need to be
147 // rebuilt, we should also copy the incremental input information.
149 check_inputs(Incremental_inputs
* incremental_inputs
)
150 { return do_check_inputs(incremental_inputs
); }
153 // Find incremental inputs section.
155 do_find_incremental_inputs_sections(unsigned int* p_inputs_shndx
,
156 unsigned int* p_symtab_shndx
,
157 unsigned int* p_relocs_shndx
,
158 unsigned int* p_got_plt_shndx
,
159 unsigned int* p_strtab_shndx
) = 0;
161 // Check the .gnu_incremental_inputs section to see whether an incremental
162 // build is possible.
164 do_check_inputs(Incremental_inputs
* incremental_inputs
) = 0;
167 // Edited output file object.
168 Output_file
* output_
;
169 // Target of the output file.
173 template<int size
, bool big_endian
>
174 class Sized_incremental_binary
: public Incremental_binary
177 Sized_incremental_binary(Output_file
* output
,
178 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
,
180 : Incremental_binary(output
, target
), elf_file_(this, ehdr
)
185 do_find_incremental_inputs_sections(unsigned int* p_inputs_shndx
,
186 unsigned int* p_symtab_shndx
,
187 unsigned int* p_relocs_shndx
,
188 unsigned int* p_got_plt_shndx
,
189 unsigned int* p_strtab_shndx
);
192 do_check_inputs(Incremental_inputs
* incremental_inputs
);
195 // Output as an ELF file.
196 elfcpp::Elf_file
<size
, big_endian
, Incremental_binary
> elf_file_
;
199 // Create an Incremental_binary object for FILE. Returns NULL is this is not
200 // possible, e.g. FILE is not an ELF file or has an unsupported target.
203 open_incremental_binary(Output_file
* file
);
205 // Code invoked early during an incremental link that checks what files need
208 class Incremental_checker
211 // Check if the file named OUTPUT_NAME can be linked incrementally.
212 // INCREMENTAL_INPUTS must have the canonical form of the command line
213 // and input arguments filled - at this point of linking other fields are
214 // probably not filled yet. TODO: for inputs that don't need to be
215 // rebuilt, this function should fill the incremental input information.
216 Incremental_checker(const char* output_name
,
217 Incremental_inputs
* incremental_inputs
)
218 : output_name_(output_name
), incremental_inputs_(incremental_inputs
)
221 // Analyzes the output file to check if incremental linking is possible and
222 // what files needs to be relinked.
224 can_incrementally_link_output_file();
227 // Name of the output file to analyze.
228 const char* output_name_
;
230 // The Incremental_inputs object. At this stage of link, only the command
231 // line and inputs are filled.
232 Incremental_inputs
* incremental_inputs_
;
235 // Base class for recording each input file.
237 class Incremental_input_entry
240 Incremental_input_entry(Stringpool::Key filename_key
, Timespec mtime
)
241 : filename_key_(filename_key
), offset_(0), info_offset_(0), mtime_(mtime
)
244 // Return the type of input file.
245 Incremental_input_type
247 { return this->do_type(); }
249 // Set the section offset of this input file entry.
251 set_offset(unsigned int offset
)
252 { this->offset_
= offset
; }
254 // Set the section offset of the supplemental information for this entry.
256 set_info_offset(unsigned int info_offset
)
257 { this->info_offset_
= info_offset
; }
259 // Get the section offset of this input file entry.
262 { return this->offset_
; }
264 // Get the section offset of the supplemental information for this entry.
266 get_info_offset() const
267 { return this->info_offset_
; }
269 // Get the stringpool key for the input filename.
271 get_filename_key() const
272 { return this->filename_key_
; }
274 // Get the modification time of the input file.
277 { return this->mtime_
; }
279 // Return a pointer to the derived Incremental_script_entry object.
280 // Return NULL for input entries that are not script files.
281 Incremental_script_entry
*
283 { return this->do_script_entry(); }
285 // Return a pointer to the derived Incremental_object_entry object.
286 // Return NULL for input entries that are not object files.
287 Incremental_object_entry
*
289 { return this->do_object_entry(); }
291 // Return a pointer to the derived Incremental_archive_entry object.
292 // Return NULL for input entries that are not archive files.
293 Incremental_archive_entry
*
295 { return this->do_archive_entry(); }
298 // Return the type of input file.
299 virtual Incremental_input_type
302 // Return a pointer to the derived Incremental_script_entry object.
303 // Return NULL for input entries that are not script files.
304 virtual Incremental_script_entry
*
308 // Return a pointer to the derived Incremental_object_entry object.
309 // Return NULL for input entries that are not object files.
310 virtual Incremental_object_entry
*
314 // Return a pointer to the derived Incremental_archive_entry object.
315 // Return NULL for input entries that are not archive files.
316 virtual Incremental_archive_entry
*
321 // Key of the filename string in the section stringtable.
322 Stringpool::Key filename_key_
;
324 // Offset of the entry in the output section.
325 unsigned int offset_
;
327 // Offset of the extra information in the output section.
328 unsigned int info_offset_
;
330 // Last modification time of the file.
334 // Class for recording input scripts.
336 class Incremental_script_entry
: public Incremental_input_entry
339 Incremental_script_entry(Stringpool::Key filename_key
, Script_info
* script
,
341 : Incremental_input_entry(filename_key
, mtime
), script_(script
)
345 virtual Incremental_input_type
347 { return INCREMENTAL_INPUT_SCRIPT
; }
349 // Return a pointer to the derived Incremental_script_entry object.
350 virtual Incremental_script_entry
*
355 // Information about the script file.
356 Script_info
* script_
;
359 // Class for recording input object files.
361 class Incremental_object_entry
: public Incremental_input_entry
364 Incremental_object_entry(Stringpool::Key filename_key
, Object
* obj
,
366 : Incremental_input_entry(filename_key
, mtime
), obj_(obj
),
367 is_member_(false), sections_()
369 if (!obj_
->is_dynamic())
370 this->sections_
.reserve(obj
->shnum());
376 { return this->obj_
; }
378 // Record that this object is an archive member.
381 { this->is_member_
= true; }
383 // Return true if this object is an archive member.
386 { return this->is_member_
; }
388 // Add an input section.
390 add_input_section(unsigned int shndx
, Stringpool::Key name_key
, off_t sh_size
)
392 if (shndx
>= this->sections_
.size())
393 this->sections_
.resize(shndx
+ 1);
394 this->sections_
[shndx
].name_key
= name_key
;
395 this->sections_
[shndx
].sh_size
= sh_size
;
398 // Return the number of input sections in this object.
400 get_input_section_count() const
401 { return this->sections_
.size(); }
403 // Return the stringpool key of the Nth input section.
405 get_input_section_name_key(unsigned int n
) const
406 { return this->sections_
[n
].name_key
; }
408 // Return the size of the Nth input section.
410 get_input_section_size(unsigned int n
) const
411 { return this->sections_
[n
].sh_size
; }
414 virtual Incremental_input_type
417 return (this->is_member_
418 ? INCREMENTAL_INPUT_ARCHIVE_MEMBER
419 : (this->obj_
->is_dynamic()
420 ? INCREMENTAL_INPUT_SHARED_LIBRARY
421 : INCREMENTAL_INPUT_OBJECT
));
424 // Return a pointer to the derived Incremental_object_entry object.
425 virtual Incremental_object_entry
*
430 // The object file itself.
433 // Whether this object is an archive member.
439 Stringpool::Key name_key
;
442 std::vector
<Input_section
> sections_
;
445 // Class for recording archive library input files.
447 class Incremental_archive_entry
: public Incremental_input_entry
450 Incremental_archive_entry(Stringpool::Key filename_key
, Archive
*,
452 : Incremental_input_entry(filename_key
, mtime
), members_(), unused_syms_()
455 // Add a member object to the archive.
457 add_object(Incremental_object_entry
* obj_entry
)
459 this->members_
.push_back(obj_entry
);
460 obj_entry
->set_is_member();
463 // Add an unused global symbol to the archive.
465 add_unused_global_symbol(Stringpool::Key symbol_key
)
466 { this->unused_syms_
.push_back(symbol_key
); }
468 // Return the number of member objects included in the link.
471 { return this->members_
.size(); }
473 // Return the Nth member object.
474 Incremental_object_entry
*
475 get_member(unsigned int n
)
476 { return this->members_
[n
]; }
478 // Return the number of unused global symbols in this archive.
480 get_unused_global_symbol_count()
481 { return this->unused_syms_
.size(); }
483 // Return the Nth unused global symbol.
485 get_unused_global_symbol(unsigned int n
)
486 { return this->unused_syms_
[n
]; }
489 virtual Incremental_input_type
491 { return INCREMENTAL_INPUT_ARCHIVE
; }
493 // Return a pointer to the derived Incremental_archive_entry object.
494 virtual Incremental_archive_entry
*
499 // Members of the archive that have been included in the link.
500 std::vector
<Incremental_object_entry
*> members_
;
502 // Unused global symbols from this archive.
503 std::vector
<Stringpool::Key
> unused_syms_
;
506 // This class contains the information needed during an incremental
507 // build about the inputs necessary to build the .gnu_incremental_inputs.
509 class Incremental_inputs
512 typedef std::vector
<Incremental_input_entry
*> Input_list
;
515 : inputs_(), command_line_(), command_line_key_(0),
516 strtab_(new Stringpool()), current_object_(NULL
),
517 current_object_entry_(NULL
), inputs_section_(NULL
),
518 symtab_section_(NULL
), relocs_section_(NULL
),
522 ~Incremental_inputs() { delete this->strtab_
; }
524 // Record the command line.
526 report_command_line(int argc
, const char* const* argv
);
528 // Record the initial info for archive file ARCHIVE.
530 report_archive_begin(Archive
* arch
);
532 // Record the final info for archive file ARCHIVE.
534 report_archive_end(Archive
* arch
);
536 // Record the info for object file OBJ. If ARCH is not NULL,
537 // attach the object file to the archive.
539 report_object(Object
* obj
, Archive
* arch
);
541 // Record an input section belonging to object file OBJ.
543 report_input_section(Object
* obj
, unsigned int shndx
, const char* name
,
546 // Record the info for input script SCRIPT.
548 report_script(const std::string
& filename
, Script_info
* script
,
551 // Return the running count of incremental relocations.
553 get_reloc_count() const
554 { return this->reloc_count_
; }
556 // Update the running count of incremental relocations.
558 set_reloc_count(unsigned int count
)
559 { this->reloc_count_
= count
; }
561 // Prepare for layout. Called from Layout::finalize.
565 // Create the .gnu_incremental_inputs and related sections.
567 create_data_sections(Symbol_table
* symtab
);
569 // Return the .gnu_incremental_inputs section.
571 inputs_section() const
572 { return this->inputs_section_
; }
574 // Return the .gnu_incremental_symtab section.
576 symtab_section() const
577 { return this->symtab_section_
; }
579 // Return the .gnu_incremental_relocs section.
581 relocs_section() const
582 { return this->relocs_section_
; }
584 // Return the .gnu_incremental_got_plt section.
586 got_plt_section() const
587 { return this->got_plt_section_
; }
589 // Return the .gnu_incremental_strtab stringpool.
591 get_stringpool() const
592 { return this->strtab_
; }
594 // Return the canonical form of the command line, as will be stored in
595 // .gnu_incremental_strtab.
598 { return this->command_line_
; }
600 // Return the stringpool key of the command line.
602 command_line_key() const
603 { return this->command_line_key_
; }
605 // Return the number of input files.
607 input_file_count() const
608 { return this->inputs_
.size(); }
610 // Return the input files.
613 { return this->inputs_
; }
615 // Return the sh_entsize value for the .gnu_incremental_relocs section.
617 relocs_entsize() const;
620 // The list of input files.
623 // Canonical form of the command line, as will be stored in
624 // .gnu_incremental_strtab.
625 std::string command_line_
;
627 // The key of the command line string in the string pool.
628 Stringpool::Key command_line_key_
;
630 // The .gnu_incremental_strtab string pool associated with the
631 // .gnu_incremental_inputs.
634 // Keep track of the object currently being processed.
635 Object
* current_object_
;
636 Incremental_object_entry
* current_object_entry_
;
638 // The .gnu_incremental_inputs section.
639 Output_section_data
* inputs_section_
;
641 // The .gnu_incremental_symtab section.
642 Output_data_space
* symtab_section_
;
644 // The .gnu_incremental_relocs section.
645 Output_data_space
* relocs_section_
;
647 // The .gnu_incremental_got_plt section.
648 Output_data_space
* got_plt_section_
;
650 // Total count of incremental relocations. Updated during Scan_relocs
651 // phase at the completion of each object file.
652 unsigned int reloc_count_
;
655 // Reader class for .gnu_incremental_inputs section.
657 template<int size
, bool big_endian
>
658 class Incremental_inputs_reader
661 typedef elfcpp::Swap
<size
, big_endian
> Swap
;
662 typedef elfcpp::Swap
<16, big_endian
> Swap16
;
663 typedef elfcpp::Swap
<32, big_endian
> Swap32
;
664 typedef elfcpp::Swap
<64, big_endian
> Swap64
;
667 Incremental_inputs_reader(const unsigned char* p
, elfcpp::Elf_strtab
& strtab
)
668 : p_(p
), strtab_(strtab
)
669 { this->input_file_count_
= Swap32::readval(this->p_
+ 4); }
671 // Return the version number.
674 { return Swap32::readval(this->p_
); }
676 // Return the count of input file entries.
678 input_file_count() const
679 { return this->input_file_count_
; }
681 // Return the command line.
685 unsigned int offset
= Swap32::readval(this->p_
+ 8);
686 return this->get_string(offset
);
689 // Reader class for an input file entry and its supplemental info.
690 class Incremental_input_entry_reader
693 Incremental_input_entry_reader(const Incremental_inputs_reader
* inputs
,
695 : inputs_(inputs
), offset_(offset
)
697 this->info_offset_
= Swap32::readval(inputs
->p_
+ offset
+ 4);
698 int type
= Swap16::readval(this->inputs_
->p_
+ offset
+ 20);
699 this->type_
= static_cast<Incremental_input_type
>(type
);
702 // Return the filename.
706 unsigned int offset
= Swap32::readval(this->inputs_
->p_
+ this->offset_
);
707 return this->inputs_
->get_string(offset
);
710 // Return the timestamp.
715 const unsigned char* p
= this->inputs_
->p_
+ this->offset_
+ 8;
716 t
.seconds
= Swap64::readval(p
);
717 t
.nanoseconds
= Swap32::readval(p
+8);
721 // Return the type of input file.
722 Incremental_input_type
724 { return this->type_
; }
726 // Return the input section count -- for objects only.
728 get_input_section_count() const
730 gold_assert(this->type_
== INCREMENTAL_INPUT_OBJECT
731 || this->type_
== INCREMENTAL_INPUT_ARCHIVE_MEMBER
);
732 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
);
735 // Return the offset of the supplemental info for symbol SYMNDX --
738 get_symbol_offset(unsigned int symndx
) const
740 gold_assert(this->type_
== INCREMENTAL_INPUT_OBJECT
741 || this->type_
== INCREMENTAL_INPUT_ARCHIVE_MEMBER
);
743 unsigned int section_count
= this->get_input_section_count();
744 return (this->info_offset_
+ 8
745 + section_count
* input_section_entry_size
749 // Return the global symbol count -- for objects & shared libraries only.
751 get_global_symbol_count() const
755 case INCREMENTAL_INPUT_OBJECT
:
756 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
757 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
+ 4);
758 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
759 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
);
765 // Return the member count -- for archives only.
767 get_member_count() const
769 gold_assert(this->type_
== INCREMENTAL_INPUT_ARCHIVE
);
770 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
);
773 // Return the unused symbol count -- for archives only.
775 get_unused_symbol_count() const
777 gold_assert(this->type_
== INCREMENTAL_INPUT_ARCHIVE
);
778 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
+ 4);
781 // Return the input file offset for archive member N -- for archives only.
783 get_member_offset(unsigned int n
) const
785 gold_assert(this->type_
== INCREMENTAL_INPUT_ARCHIVE
);
786 return Swap32::readval(this->inputs_
->p_
+ this->info_offset_
790 // Return the Nth unused global symbol -- for archives only.
792 get_unused_symbol(unsigned int n
) const
794 gold_assert(this->type_
== INCREMENTAL_INPUT_ARCHIVE
);
795 unsigned int member_count
= this->get_member_count();
796 unsigned int offset
= Swap32::readval(this->inputs_
->p_
797 + this->info_offset_
+ 8
800 return this->inputs_
->get_string(offset
);
803 // Information about an input section.
804 struct Input_section_info
807 unsigned int output_shndx
;
812 // Return info about the Nth input section -- for objects only.
814 get_input_section(unsigned int n
) const
816 Input_section_info info
;
817 const unsigned char* p
= (this->inputs_
->p_
818 + this->info_offset_
+ 8
819 + n
* input_section_entry_size
);
820 unsigned int name_offset
= Swap32::readval(p
);
821 info
.name
= this->inputs_
->get_string(name_offset
);
822 info
.output_shndx
= Swap32::readval(p
+ 4);
823 info
.sh_offset
= Swap::readval(p
+ 8);
824 info
.sh_size
= Swap::readval(p
+ 8 + size
/ 8);
828 // Information about a global symbol.
829 struct Global_symbol_info
831 unsigned int output_symndx
;
832 unsigned int next_offset
;
833 unsigned int reloc_count
;
834 unsigned int reloc_offset
;
837 // Return info about the Nth global symbol -- for objects only.
839 get_global_symbol_info(unsigned int n
) const
841 Global_symbol_info info
;
842 unsigned int section_count
= this->get_input_section_count();
843 const unsigned char* p
= (this->inputs_
->p_
844 + this->info_offset_
+ 8
845 + section_count
* input_section_entry_size
847 info
.output_symndx
= Swap32::readval(p
);
848 info
.next_offset
= Swap32::readval(p
+ 4);
849 info
.reloc_count
= Swap::readval(p
+ 8);
850 info
.reloc_offset
= Swap::readval(p
+ 12);
855 // Size of an input section entry.
856 static const unsigned int input_section_entry_size
= 8 + 2 * size
/ 8;
857 // The reader instance for the containing section.
858 const Incremental_inputs_reader
* inputs_
;
859 // The type of input file.
860 Incremental_input_type type_
;
861 // Section offset to the input file entry.
862 unsigned int offset_
;
863 // Section offset to the supplemental info for the input file.
864 unsigned int info_offset_
;
867 // Return a reader for the Nth input file entry.
868 Incremental_input_entry_reader
869 input_file(unsigned int n
) const
871 gold_assert(n
< this->input_file_count_
);
872 Incremental_input_entry_reader
input(this, 16 + n
* 24);
877 // Lookup a string in the ELF string table.
878 const char* get_string(unsigned int offset
) const
881 if (this->strtab_
.get_c_string(offset
, &s
))
886 // Base address of the .gnu_incremental_inputs section.
887 const unsigned char* p_
;
888 // The associated ELF string table.
889 elfcpp::Elf_strtab strtab_
;
890 // The number of input file entries in this section.
891 unsigned int input_file_count_
;
894 // Reader class for the .gnu_incremental_symtab section.
896 template<bool big_endian
>
897 class Incremental_symtab_reader
900 Incremental_symtab_reader(const unsigned char* p
) : p_(p
)
903 // Return the list head for symbol table entry N.
904 unsigned int get_list_head(unsigned int n
) const
905 { return elfcpp::Swap
<32, big_endian
>::readval(this->p_
+ 4 * n
); }
908 // Base address of the .gnu_incremental_relocs section.
909 const unsigned char* p_
;
912 // Reader class for the .gnu_incremental_relocs section.
914 template<int size
, bool big_endian
>
915 class Incremental_relocs_reader
918 // Size of each field.
919 static const unsigned int field_size
= size
/ 8;
922 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
923 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Addend
;
925 // Size of each entry.
926 static const unsigned int reloc_size
= 8 + 2 * field_size
;
928 Incremental_relocs_reader(const unsigned char* p
) : p_(p
)
931 // Return the relocation type for relocation entry at offset OFF.
933 get_r_type(unsigned int off
) const
935 return elfcpp::Swap
<32, big_endian
>::readval(this->p_
+ off
);
938 // Return the output section index for relocation entry at offset OFF.
940 get_r_shndx(unsigned int off
) const
942 return elfcpp::Swap
<32, big_endian
>::readval(this->p_
+ off
+ 4);
945 // Return the output section offset for relocation entry at offset OFF.
947 get_r_offset(unsigned int off
) const
949 return elfcpp::Swap
<size
, big_endian
>::readval(this->p_
+ off
+ 8);
952 // Return the addend for relocation entry at offset OFF.
954 get_r_addend(unsigned int off
) const
956 return elfcpp::Swap
<size
, big_endian
>::readval(this->p_
+ off
+ 8
961 // Base address of the .gnu_incremental_relocs section.
962 const unsigned char* p_
;
965 // Reader class for the .gnu_incremental_got_plt section.
967 template<bool big_endian
>
968 class Incremental_got_plt_reader
971 Incremental_got_plt_reader(const unsigned char* p
) : p_(p
)
973 this->got_count_
= elfcpp::Swap
<32, big_endian
>::readval(p
);
974 this->got_desc_p_
= p
+ 8 + ((this->got_count_
+ 3) & ~3);
975 this->plt_desc_p_
= this->got_desc_p_
+ this->got_count_
* 4;
978 // Return the GOT entry count.
980 get_got_entry_count() const
982 return this->got_count_
;
985 // Return the PLT entry count.
987 get_plt_entry_count() const
989 return elfcpp::Swap
<32, big_endian
>::readval(this->p_
+ 4);
992 // Return the GOT type for GOT entry N.
994 get_got_type(unsigned int n
)
996 return this->p_
[8 + n
];
999 // Return the GOT descriptor for GOT entry N.
1001 get_got_desc(unsigned int n
)
1003 return elfcpp::Swap
<32, big_endian
>::readval(this->got_desc_p_
+ n
* 4);
1006 // Return the PLT descriptor for PLT entry N.
1008 get_plt_desc(unsigned int n
)
1010 return elfcpp::Swap
<32, big_endian
>::readval(this->plt_desc_p_
+ n
* 4);
1014 // Base address of the .gnu_incremental_got_plt section.
1015 const unsigned char* p_
;
1017 unsigned int got_count_
;
1018 // Base address of the GOT descriptor array.
1019 const unsigned char* got_desc_p_
;
1020 // Base address of the PLT descriptor array.
1021 const unsigned char* plt_desc_p_
;
1024 } // End namespace gold.
1026 #endif // !defined(GOLD_INCREMENTAL_H)