1 // inremental.cc -- incremental linking support for gold
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.
27 #include "libiberty.h"
33 #include "incremental.h"
37 #include "target-select.h"
44 // Version information. Will change frequently during the development, later
45 // we could think about backward (and forward?) compatibility.
46 const unsigned int INCREMENTAL_LINK_VERSION
= 1;
48 // This class manages the .gnu_incremental_inputs section, which holds
49 // the header information, a directory of input files, and separate
50 // entries for each input file.
52 template<int size
, bool big_endian
>
53 class Output_section_incremental_inputs
: public Output_section_data
56 Output_section_incremental_inputs(const Incremental_inputs
* inputs
,
57 const Symbol_table
* symtab
)
58 : Output_section_data(size
/ 8), inputs_(inputs
), symtab_(symtab
)
62 // This is called to update the section size prior to assigning
63 // the address and file offset.
66 { this->set_final_data_size(); }
68 // Set the final data size.
70 set_final_data_size();
72 // Write the data to the file.
74 do_write(Output_file
*);
76 // Write to a map file.
78 do_print_to_mapfile(Mapfile
* mapfile
) const
79 { mapfile
->print_output_data(this, _("** incremental_inputs")); }
82 // Write the section header.
84 write_header(unsigned char* pov
, unsigned int input_file_count
,
85 section_offset_type command_line_offset
);
87 // Write the input file entries.
89 write_input_files(unsigned char* oview
, unsigned char* pov
,
92 // Write the supplemental information blocks.
94 write_info_blocks(unsigned char* oview
, unsigned char* pov
,
95 Stringpool
* strtab
, unsigned int* global_syms
,
96 unsigned int global_sym_count
);
98 // Write the contents of the .gnu_incremental_symtab section.
100 write_symtab(unsigned char* pov
, unsigned int* global_syms
,
101 unsigned int global_sym_count
);
103 // Write the contents of the .gnu_incremental_got_plt section.
105 write_got_plt(unsigned char* pov
, off_t view_size
);
107 // Typedefs for writing the data to the output sections.
108 typedef elfcpp::Swap
<size
, big_endian
> Swap
;
109 typedef elfcpp::Swap
<16, big_endian
> Swap16
;
110 typedef elfcpp::Swap
<32, big_endian
> Swap32
;
111 typedef elfcpp::Swap
<64, big_endian
> Swap64
;
113 // Sizes of various structures.
114 static const int sizeof_addr
= size
/ 8;
115 static const int header_size
= 16;
116 static const int input_entry_size
= 24;
118 // The Incremental_inputs object.
119 const Incremental_inputs
* inputs_
;
122 const Symbol_table
* symtab_
;
125 // Inform the user why we don't do an incremental link. Not called in
126 // the obvious case of missing output file. TODO: Is this helpful?
129 vexplain_no_incremental(const char* format
, va_list args
)
132 if (vasprintf(&buf
, format
, args
) < 0)
134 gold_info(_("the link might take longer: "
135 "cannot perform incremental link: %s"), buf
);
140 explain_no_incremental(const char* format
, ...)
143 va_start(args
, format
);
144 vexplain_no_incremental(format
, args
);
151 Incremental_binary::error(const char* format
, ...) const
154 va_start(args
, format
);
155 // Current code only checks if the file can be used for incremental linking,
156 // so errors shouldn't fail the build, but only result in a fallback to a
158 // TODO: when we implement incremental editing of the file, we may need a
159 // flag that will cause errors to be treated seriously.
160 vexplain_no_incremental(format
, args
);
164 // Find the .gnu_incremental_inputs section and related sections.
166 template<int size
, bool big_endian
>
168 Sized_incremental_binary
<size
, big_endian
>::find_incremental_inputs_sections(
169 unsigned int* p_inputs_shndx
,
170 unsigned int* p_symtab_shndx
,
171 unsigned int* p_relocs_shndx
,
172 unsigned int* p_got_plt_shndx
,
173 unsigned int* p_strtab_shndx
)
175 unsigned int inputs_shndx
=
176 this->elf_file_
.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_INPUTS
);
177 if (inputs_shndx
== elfcpp::SHN_UNDEF
) // Not found.
180 unsigned int symtab_shndx
=
181 this->elf_file_
.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_SYMTAB
);
182 if (symtab_shndx
== elfcpp::SHN_UNDEF
) // Not found.
184 if (this->elf_file_
.section_link(symtab_shndx
) != inputs_shndx
)
187 unsigned int relocs_shndx
=
188 this->elf_file_
.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_RELOCS
);
189 if (relocs_shndx
== elfcpp::SHN_UNDEF
) // Not found.
191 if (this->elf_file_
.section_link(relocs_shndx
) != inputs_shndx
)
194 unsigned int got_plt_shndx
=
195 this->elf_file_
.find_section_by_type(elfcpp::SHT_GNU_INCREMENTAL_GOT_PLT
);
196 if (got_plt_shndx
== elfcpp::SHN_UNDEF
) // Not found.
198 if (this->elf_file_
.section_link(got_plt_shndx
) != inputs_shndx
)
201 unsigned int strtab_shndx
= this->elf_file_
.section_link(inputs_shndx
);
202 if (strtab_shndx
== elfcpp::SHN_UNDEF
203 || strtab_shndx
> this->elf_file_
.shnum()
204 || this->elf_file_
.section_type(strtab_shndx
) != elfcpp::SHT_STRTAB
)
207 if (p_inputs_shndx
!= NULL
)
208 *p_inputs_shndx
= inputs_shndx
;
209 if (p_symtab_shndx
!= NULL
)
210 *p_symtab_shndx
= symtab_shndx
;
211 if (p_relocs_shndx
!= NULL
)
212 *p_relocs_shndx
= relocs_shndx
;
213 if (p_got_plt_shndx
!= NULL
)
214 *p_got_plt_shndx
= got_plt_shndx
;
215 if (p_strtab_shndx
!= NULL
)
216 *p_strtab_shndx
= strtab_shndx
;
220 // Set up the readers into the incremental info sections.
222 template<int size
, bool big_endian
>
224 Sized_incremental_binary
<size
, big_endian
>::setup_readers()
226 unsigned int inputs_shndx
;
227 unsigned int symtab_shndx
;
228 unsigned int relocs_shndx
;
229 unsigned int got_plt_shndx
;
230 unsigned int strtab_shndx
;
232 if (!this->find_incremental_inputs_sections(&inputs_shndx
, &symtab_shndx
,
233 &relocs_shndx
, &got_plt_shndx
,
237 Location
inputs_location(this->elf_file_
.section_contents(inputs_shndx
));
238 Location
symtab_location(this->elf_file_
.section_contents(symtab_shndx
));
239 Location
relocs_location(this->elf_file_
.section_contents(relocs_shndx
));
240 Location
got_plt_location(this->elf_file_
.section_contents(got_plt_shndx
));
241 Location
strtab_location(this->elf_file_
.section_contents(strtab_shndx
));
243 View inputs_view
= this->view(inputs_location
);
244 View symtab_view
= this->view(symtab_location
);
245 View relocs_view
= this->view(relocs_location
);
246 View got_plt_view
= this->view(got_plt_location
);
247 View strtab_view
= this->view(strtab_location
);
249 elfcpp::Elf_strtab
strtab(strtab_view
.data(), strtab_location
.data_size
);
251 this->inputs_reader_
=
252 Incremental_inputs_reader
<size
, big_endian
>(inputs_view
.data(), strtab
);
253 this->symtab_reader_
=
254 Incremental_symtab_reader
<big_endian
>(symtab_view
.data(),
255 symtab_location
.data_size
);
256 this->relocs_reader_
=
257 Incremental_relocs_reader
<size
, big_endian
>(relocs_view
.data(),
258 relocs_location
.data_size
);
259 this->got_plt_reader_
=
260 Incremental_got_plt_reader
<big_endian
>(got_plt_view
.data());
262 // Find the main symbol table.
263 unsigned int main_symtab_shndx
=
264 this->elf_file_
.find_section_by_type(elfcpp::SHT_SYMTAB
);
265 gold_assert(main_symtab_shndx
!= elfcpp::SHN_UNDEF
);
266 this->main_symtab_loc_
= this->elf_file_
.section_contents(main_symtab_shndx
);
268 // Find the main symbol string table.
269 unsigned int main_strtab_shndx
=
270 this->elf_file_
.section_link(main_symtab_shndx
);
271 gold_assert(main_strtab_shndx
!= elfcpp::SHN_UNDEF
272 && main_strtab_shndx
< this->elf_file_
.shnum());
273 this->main_strtab_loc_
= this->elf_file_
.section_contents(main_strtab_shndx
);
275 // Walk the list of input files (a) to setup an Input_reader for each
276 // input file, and (b) to record maps of files added from archive
277 // libraries and scripts.
278 Incremental_inputs_reader
<size
, big_endian
>& inputs
= this->inputs_reader_
;
279 unsigned int count
= inputs
.input_file_count();
280 this->input_objects_
.resize(count
);
281 this->input_entry_readers_
.reserve(count
);
282 this->library_map_
.resize(count
);
283 this->script_map_
.resize(count
);
284 for (unsigned int i
= 0; i
< count
; i
++)
286 Input_entry_reader input_file
= inputs
.input_file(i
);
287 this->input_entry_readers_
.push_back(Sized_input_reader(input_file
));
288 switch (input_file
.type())
290 case INCREMENTAL_INPUT_OBJECT
:
291 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
292 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
293 // No special treatment necessary.
295 case INCREMENTAL_INPUT_ARCHIVE
:
297 Incremental_library
* lib
=
298 new Incremental_library(input_file
.filename(), i
,
299 &this->input_entry_readers_
[i
]);
300 this->library_map_
[i
] = lib
;
301 unsigned int member_count
= input_file
.get_member_count();
302 for (unsigned int j
= 0; j
< member_count
; j
++)
304 int member_offset
= input_file
.get_member_offset(j
);
305 int member_index
= inputs
.input_file_index(member_offset
);
306 this->library_map_
[member_index
] = lib
;
310 case INCREMENTAL_INPUT_SCRIPT
:
312 Script_info
* script
= new Script_info(input_file
.filename());
313 this->script_map_
[i
] = script
;
314 unsigned int object_count
= input_file
.get_object_count();
315 for (unsigned int j
= 0; j
< object_count
; j
++)
317 int object_offset
= input_file
.get_object_offset(j
);
318 int object_index
= inputs
.input_file_index(object_offset
);
319 this->script_map_
[object_index
] = script
;
328 // Initialize the map of global symbols.
329 unsigned int nglobals
= this->symtab_reader_
.symbol_count();
330 this->symbol_map_
.resize(nglobals
);
332 this->has_incremental_info_
= true;
335 // Walk the list of input files given on the command line, and build
336 // a direct map of file index to the corresponding input argument.
339 check_input_args(std::vector
<const Input_argument
*>& input_args_map
,
340 Input_arguments::const_iterator begin
,
341 Input_arguments::const_iterator end
)
343 for (Input_arguments::const_iterator p
= begin
;
349 const Input_file_group
* group
= p
->group();
350 check_input_args(input_args_map
, group
->begin(), group
->end());
352 else if (p
->is_lib())
354 const Input_file_lib
* lib
= p
->lib();
355 check_input_args(input_args_map
, lib
->begin(), lib
->end());
359 gold_assert(p
->is_file());
360 unsigned int arg_serial
= p
->file().arg_serial();
363 gold_assert(arg_serial
<= input_args_map
.size());
364 gold_assert(input_args_map
[arg_serial
- 1] == 0);
365 input_args_map
[arg_serial
- 1] = &*p
;
371 // Determine whether an incremental link based on the existing output file
374 template<int size
, bool big_endian
>
376 Sized_incremental_binary
<size
, big_endian
>::do_check_inputs(
377 const Command_line
& cmdline
,
378 Incremental_inputs
* incremental_inputs
)
380 Incremental_inputs_reader
<size
, big_endian
>& inputs
= this->inputs_reader_
;
382 if (!this->has_incremental_info_
)
384 explain_no_incremental(_("no incremental data from previous build"));
388 if (inputs
.version() != INCREMENTAL_LINK_VERSION
)
390 explain_no_incremental(_("different version of incremental build data"));
394 if (incremental_inputs
->command_line() != inputs
.command_line())
396 explain_no_incremental(_("command line changed"));
400 // Walk the list of input files given on the command line, and build
401 // a direct map of argument serial numbers to the corresponding input
403 this->input_args_map_
.resize(cmdline
.number_of_input_files());
404 check_input_args(this->input_args_map_
, cmdline
.begin(), cmdline
.end());
406 // Walk the list of input files to check for conditions that prevent
407 // an incremental update link.
408 unsigned int count
= inputs
.input_file_count();
409 for (unsigned int i
= 0; i
< count
; i
++)
411 Input_entry_reader input_file
= inputs
.input_file(i
);
412 switch (input_file
.type())
414 case INCREMENTAL_INPUT_OBJECT
:
415 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
416 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
417 case INCREMENTAL_INPUT_ARCHIVE
:
418 // No special treatment necessary.
420 case INCREMENTAL_INPUT_SCRIPT
:
421 if (this->do_file_has_changed(i
))
423 explain_no_incremental(_("%s: script file changed"),
424 input_file
.filename());
436 // Return TRUE if input file N has changed since the last incremental link.
438 template<int size
, bool big_endian
>
440 Sized_incremental_binary
<size
, big_endian
>::do_file_has_changed(
441 unsigned int n
) const
443 Input_entry_reader input_file
= this->inputs_reader_
.input_file(n
);
444 Incremental_disposition disp
= INCREMENTAL_CHECK
;
445 const Input_argument
* input_argument
= this->get_input_argument(n
);
446 if (input_argument
!= NULL
)
447 disp
= input_argument
->file().options().incremental_disposition();
449 if (disp
!= INCREMENTAL_CHECK
)
450 return disp
== INCREMENTAL_CHANGED
;
452 const char* filename
= input_file
.filename();
453 Timespec old_mtime
= input_file
.get_mtime();
455 if (!get_mtime(filename
, &new_mtime
))
457 // If we can't open get the current modification time, assume it has
458 // changed. If the file doesn't exist, we'll issue an error when we
459 // try to open it later.
463 if (new_mtime
.seconds
> old_mtime
.seconds
)
465 if (new_mtime
.seconds
== old_mtime
.seconds
466 && new_mtime
.nanoseconds
> old_mtime
.nanoseconds
)
471 // Initialize the layout of the output file based on the existing
474 template<int size
, bool big_endian
>
476 Sized_incremental_binary
<size
, big_endian
>::do_init_layout(Layout
* layout
)
478 typedef elfcpp::Shdr
<size
, big_endian
> Shdr
;
479 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
481 // Get views of the section headers and the section string table.
482 const off_t shoff
= this->elf_file_
.shoff();
483 const unsigned int shnum
= this->elf_file_
.shnum();
484 const unsigned int shstrndx
= this->elf_file_
.shstrndx();
485 Location
shdrs_location(shoff
, shnum
* shdr_size
);
486 Location
shstrndx_location(this->elf_file_
.section_contents(shstrndx
));
487 View shdrs_view
= this->view(shdrs_location
);
488 View shstrndx_view
= this->view(shstrndx_location
);
489 elfcpp::Elf_strtab
shstrtab(shstrndx_view
.data(),
490 shstrndx_location
.data_size
);
492 layout
->set_incremental_base(this);
494 // Initialize the layout.
495 this->section_map_
.resize(shnum
);
496 const unsigned char* pshdr
= shdrs_view
.data() + shdr_size
;
497 for (unsigned int i
= 1; i
< shnum
; i
++)
501 if (!shstrtab
.get_c_string(shdr
.get_sh_name(), &name
))
503 gold_debug(DEBUG_INCREMENTAL
,
504 "Output section: %2d %08lx %08lx %08lx %3d %s",
506 static_cast<long>(shdr
.get_sh_addr()),
507 static_cast<long>(shdr
.get_sh_offset()),
508 static_cast<long>(shdr
.get_sh_size()),
509 shdr
.get_sh_type(), name
? name
: "<null>");
510 this->section_map_
[i
] = layout
->init_fixed_output_section(name
, shdr
);
515 // Mark regions of the input file that must be kept unchanged.
517 template<int size
, bool big_endian
>
519 Sized_incremental_binary
<size
, big_endian
>::do_reserve_layout(
520 unsigned int input_file_index
)
522 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
524 Input_entry_reader input_file
=
525 this->inputs_reader_
.input_file(input_file_index
);
527 if (input_file
.type() == INCREMENTAL_INPUT_SHARED_LIBRARY
)
529 // Reserve the BSS space used for COPY relocations.
530 unsigned int nsyms
= input_file
.get_global_symbol_count();
531 Incremental_binary::View
symtab_view(NULL
);
532 unsigned int symtab_count
;
533 elfcpp::Elf_strtab
strtab(NULL
, 0);
534 this->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
535 for (unsigned int i
= 0; i
< nsyms
; ++i
)
539 unsigned int output_symndx
=
540 input_file
.get_output_symbol_index(i
, &is_def
, &is_copy
);
543 const unsigned char* sym_p
= (symtab_view
.data()
544 + output_symndx
* sym_size
);
545 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
546 unsigned int shndx
= gsym
.get_st_shndx();
547 if (shndx
< 1 || shndx
>= this->section_map_
.size())
549 Output_section
* os
= this->section_map_
[shndx
];
550 off_t offset
= gsym
.get_st_value() - os
->address();
551 os
->reserve(offset
, gsym
.get_st_size());
552 gold_debug(DEBUG_INCREMENTAL
,
553 "Reserve for COPY reloc: %s, off %d, size %d",
555 static_cast<int>(offset
),
556 static_cast<int>(gsym
.get_st_size()));
562 unsigned int shnum
= input_file
.get_input_section_count();
563 for (unsigned int i
= 0; i
< shnum
; i
++)
565 typename
Input_entry_reader::Input_section_info sect
=
566 input_file
.get_input_section(i
);
567 if (sect
.output_shndx
== 0 || sect
.sh_offset
== -1)
569 Output_section
* os
= this->section_map_
[sect
.output_shndx
];
570 gold_assert(os
!= NULL
);
571 os
->reserve(sect
.sh_offset
, sect
.sh_size
);
575 // Process the GOT and PLT entries from the existing output file.
577 template<int size
, bool big_endian
>
579 Sized_incremental_binary
<size
, big_endian
>::do_process_got_plt(
580 Symbol_table
* symtab
,
583 Incremental_got_plt_reader
<big_endian
> got_plt_reader(this->got_plt_reader());
584 Sized_target
<size
, big_endian
>* target
=
585 parameters
->sized_target
<size
, big_endian
>();
587 // Get the number of symbols in the main symbol table and in the
588 // incremental symbol table. The difference between the two counts
589 // is the index of the first forced-local or global symbol in the
590 // main symbol table.
591 unsigned int symtab_count
=
592 this->main_symtab_loc_
.data_size
/ elfcpp::Elf_sizes
<size
>::sym_size
;
593 unsigned int isym_count
= this->symtab_reader_
.symbol_count();
594 unsigned int first_global
= symtab_count
- isym_count
;
596 // Tell the target how big the GOT and PLT sections are.
597 unsigned int got_count
= got_plt_reader
.get_got_entry_count();
598 unsigned int plt_count
= got_plt_reader
.get_plt_entry_count();
599 Output_data_got
<size
, big_endian
>* got
=
600 target
->init_got_plt_for_update(symtab
, layout
, got_count
, plt_count
);
602 // Read the GOT entries from the base file and build the outgoing GOT.
603 for (unsigned int i
= 0; i
< got_count
; ++i
)
605 unsigned int got_type
= got_plt_reader
.get_got_type(i
);
606 if ((got_type
& 0x7f) == 0x7f)
608 // This is the second entry of a pair.
609 got
->reserve_slot(i
);
612 unsigned int symndx
= got_plt_reader
.get_got_symndx(i
);
615 // This is an entry for a local symbol. Ignore this entry if
616 // the object file was replaced.
617 unsigned int input_index
= got_plt_reader
.get_got_input_index(i
);
618 gold_debug(DEBUG_INCREMENTAL
,
619 "GOT entry %d, type %02x: (local symbol)",
621 Sized_relobj_incr
<size
, big_endian
>* obj
=
622 this->input_object(input_index
);
624 target
->reserve_local_got_entry(i
, obj
, symndx
, got_type
& 0x7f);
628 // This is an entry for a global symbol. GOT_DESC is the symbol
630 // FIXME: This should really be a fatal error (corrupt input).
631 gold_assert(symndx
>= first_global
&& symndx
< symtab_count
);
632 Symbol
* sym
= this->global_symbol(symndx
- first_global
);
633 // Add the GOT entry only if the symbol is still referenced.
634 if (sym
!= NULL
&& sym
->in_reg())
636 gold_debug(DEBUG_INCREMENTAL
,
637 "GOT entry %d, type %02x: %s",
638 i
, got_type
, sym
->name());
639 target
->reserve_global_got_entry(i
, sym
, got_type
);
644 // Read the PLT entries from the base file and pass each to the target.
645 for (unsigned int i
= 0; i
< plt_count
; ++i
)
647 unsigned int plt_desc
= got_plt_reader
.get_plt_desc(i
);
648 // FIXME: This should really be a fatal error (corrupt input).
649 gold_assert(plt_desc
>= first_global
&& plt_desc
< symtab_count
);
650 Symbol
* sym
= this->global_symbol(plt_desc
- first_global
);
651 // Add the PLT entry only if the symbol is still referenced.
654 gold_debug(DEBUG_INCREMENTAL
,
657 target
->register_global_plt_entry(i
, sym
);
662 // Emit COPY relocations from the existing output file.
664 template<int size
, bool big_endian
>
666 Sized_incremental_binary
<size
, big_endian
>::do_emit_copy_relocs(
667 Symbol_table
* symtab
)
669 Sized_target
<size
, big_endian
>* target
=
670 parameters
->sized_target
<size
, big_endian
>();
672 for (typename
Copy_relocs::iterator p
= this->copy_relocs_
.begin();
673 p
!= this->copy_relocs_
.end();
676 if (!(*p
).symbol
->is_copied_from_dynobj())
677 target
->emit_copy_reloc(symtab
, (*p
).symbol
, (*p
).output_section
,
682 // Apply incremental relocations for symbols whose values have changed.
684 template<int size
, bool big_endian
>
686 Sized_incremental_binary
<size
, big_endian
>::do_apply_incremental_relocs(
687 const Symbol_table
* symtab
,
691 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
692 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Addend
;
693 Incremental_symtab_reader
<big_endian
> isymtab(this->symtab_reader());
694 Incremental_relocs_reader
<size
, big_endian
> irelocs(this->relocs_reader());
695 unsigned int nglobals
= isymtab
.symbol_count();
696 const unsigned int incr_reloc_size
= irelocs
.reloc_size
;
698 Relocate_info
<size
, big_endian
> relinfo
;
699 relinfo
.symtab
= symtab
;
700 relinfo
.layout
= layout
;
701 relinfo
.object
= NULL
;
702 relinfo
.reloc_shndx
= 0;
703 relinfo
.reloc_shdr
= NULL
;
704 relinfo
.data_shndx
= 0;
705 relinfo
.data_shdr
= NULL
;
707 Sized_target
<size
, big_endian
>* target
=
708 parameters
->sized_target
<size
, big_endian
>();
710 for (unsigned int i
= 0; i
< nglobals
; i
++)
712 const Symbol
* gsym
= this->global_symbol(i
);
714 // If the symbol is not referenced from any unchanged input files,
715 // we do not need to reapply any of its relocations.
719 // If the symbol is defined in an unchanged file, we do not need to
720 // reapply any of its relocations.
721 if (gsym
->source() == Symbol::FROM_OBJECT
722 && gsym
->object()->is_incremental())
725 gold_debug(DEBUG_INCREMENTAL
,
726 "Applying incremental relocations for global symbol %s [%d]",
729 // Follow the linked list of input symbol table entries for this symbol.
730 // We don't bother to figure out whether the symbol table entry belongs
731 // to a changed or unchanged file because it's easier just to apply all
732 // the relocations -- although we might scribble over an area that has
733 // been reallocated, we do this before copying any new data into the
735 unsigned int offset
= isymtab
.get_list_head(i
);
738 Incremental_global_symbol_reader
<big_endian
> sym_info
=
739 this->inputs_reader().global_symbol_reader_at_offset(offset
);
740 unsigned int r_base
= sym_info
.reloc_offset();
741 unsigned int r_count
= sym_info
.reloc_count();
743 // Apply each relocation for this symbol table entry.
744 for (unsigned int j
= 0; j
< r_count
;
745 ++j
, r_base
+= incr_reloc_size
)
747 unsigned int r_type
= irelocs
.get_r_type(r_base
);
748 unsigned int r_shndx
= irelocs
.get_r_shndx(r_base
);
749 Address r_offset
= irelocs
.get_r_offset(r_base
);
750 Addend r_addend
= irelocs
.get_r_addend(r_base
);
751 Output_section
* os
= this->output_section(r_shndx
);
752 Address address
= os
->address();
753 off_t section_offset
= os
->offset();
754 size_t view_size
= os
->data_size();
755 unsigned char* const view
= of
->get_output_view(section_offset
,
758 gold_debug(DEBUG_INCREMENTAL
,
759 " %08lx: %s + %d: type %d addend %ld",
760 (long)(section_offset
+ r_offset
),
766 target
->apply_relocation(&relinfo
, r_offset
, r_type
, r_addend
,
767 gsym
, view
, address
, view_size
);
769 // FIXME: Do something more efficient if write_output_view
770 // ever becomes more than a no-op.
771 of
->write_output_view(section_offset
, view_size
, view
);
773 offset
= sym_info
.next_offset();
778 // Get a view of the main symbol table and the symbol string table.
780 template<int size
, bool big_endian
>
782 Sized_incremental_binary
<size
, big_endian
>::get_symtab_view(
785 elfcpp::Elf_strtab
* strtab
)
787 *symtab_view
= this->view(this->main_symtab_loc_
);
788 *nsyms
= this->main_symtab_loc_
.data_size
/ elfcpp::Elf_sizes
<size
>::sym_size
;
790 View
strtab_view(this->view(this->main_strtab_loc_
));
791 *strtab
= elfcpp::Elf_strtab(strtab_view
.data(),
792 this->main_strtab_loc_
.data_size
);
798 // Create a Sized_incremental_binary object of the specified size and
799 // endianness. Fails if the target architecture is not supported.
801 template<int size
, bool big_endian
>
803 make_sized_incremental_binary(Output_file
* file
,
804 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
806 Target
* target
= select_target(ehdr
.get_e_machine(), size
, big_endian
,
807 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
808 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
811 explain_no_incremental(_("unsupported ELF machine number %d"),
812 ehdr
.get_e_machine());
816 if (!parameters
->target_valid())
817 set_parameters_target(target
);
818 else if (target
!= ¶meters
->target())
819 gold_error(_("%s: incompatible target"), file
->filename());
821 return new Sized_incremental_binary
<size
, big_endian
>(file
, ehdr
, target
);
824 } // End of anonymous namespace.
826 // Create an Incremental_binary object for FILE. Returns NULL is this is not
827 // possible, e.g. FILE is not an ELF file or has an unsupported target. FILE
831 open_incremental_binary(Output_file
* file
)
833 off_t filesize
= file
->filesize();
834 int want
= elfcpp::Elf_recognizer::max_header_size
;
838 const unsigned char* p
= file
->get_input_view(0, want
);
839 if (!elfcpp::Elf_recognizer::is_elf_file(p
, want
))
841 explain_no_incremental(_("output is not an ELF file."));
846 bool big_endian
= false;
848 if (!elfcpp::Elf_recognizer::is_valid_header(p
, want
, &size
, &big_endian
,
851 explain_no_incremental(error
.c_str());
855 Incremental_binary
* result
= NULL
;
860 #ifdef HAVE_TARGET_32_BIG
861 result
= make_sized_incremental_binary
<32, true>(
862 file
, elfcpp::Ehdr
<32, true>(p
));
864 explain_no_incremental(_("unsupported file: 32-bit, big-endian"));
869 #ifdef HAVE_TARGET_32_LITTLE
870 result
= make_sized_incremental_binary
<32, false>(
871 file
, elfcpp::Ehdr
<32, false>(p
));
873 explain_no_incremental(_("unsupported file: 32-bit, little-endian"));
881 #ifdef HAVE_TARGET_64_BIG
882 result
= make_sized_incremental_binary
<64, true>(
883 file
, elfcpp::Ehdr
<64, true>(p
));
885 explain_no_incremental(_("unsupported file: 64-bit, big-endian"));
890 #ifdef HAVE_TARGET_64_LITTLE
891 result
= make_sized_incremental_binary
<64, false>(
892 file
, elfcpp::Ehdr
<64, false>(p
));
894 explain_no_incremental(_("unsupported file: 64-bit, little-endian"));
904 // Class Incremental_inputs.
906 // Add the command line to the string table, setting
907 // command_line_key_. In incremental builds, the command line is
908 // stored in .gnu_incremental_inputs so that the next linker run can
909 // check if the command line options didn't change.
912 Incremental_inputs::report_command_line(int argc
, const char* const* argv
)
914 // Always store 'gold' as argv[0] to avoid a full relink if the user used a
915 // different path to the linker.
916 std::string
args("gold");
917 // Copied from collect_argv in main.cc.
918 for (int i
= 1; i
< argc
; ++i
)
920 // Adding/removing these options should not result in a full relink.
921 if (strcmp(argv
[i
], "--incremental") == 0
922 || strcmp(argv
[i
], "--incremental-full") == 0
923 || strcmp(argv
[i
], "--incremental-update") == 0
924 || strcmp(argv
[i
], "--incremental-changed") == 0
925 || strcmp(argv
[i
], "--incremental-unchanged") == 0
926 || strcmp(argv
[i
], "--incremental-unknown") == 0
927 || is_prefix_of("--incremental-base=", argv
[i
])
928 || is_prefix_of("--incremental-patch=", argv
[i
])
929 || is_prefix_of("--debug=", argv
[i
]))
931 if (strcmp(argv
[i
], "--incremental-base") == 0
932 || strcmp(argv
[i
], "--incremental-patch") == 0
933 || strcmp(argv
[i
], "--debug") == 0)
935 // When these options are used without the '=', skip the
936 // following parameter as well.
942 // Now append argv[i], but with all single-quotes escaped
943 const char* argpos
= argv
[i
];
946 const int len
= strcspn(argpos
, "'");
947 args
.append(argpos
, len
);
948 if (argpos
[len
] == '\0')
950 args
.append("'\"'\"'");
956 this->command_line_
= args
;
957 this->strtab_
->add(this->command_line_
.c_str(), false,
958 &this->command_line_key_
);
961 // Record the input archive file ARCHIVE. This is called by the
962 // Add_archive_symbols task before determining which archive members
963 // to include. We create the Incremental_archive_entry here and
964 // attach it to the Archive, but we do not add it to the list of
965 // input objects until report_archive_end is called.
968 Incremental_inputs::report_archive_begin(Library_base
* arch
,
969 unsigned int arg_serial
,
970 Script_info
* script_info
)
972 Stringpool::Key filename_key
;
973 Timespec mtime
= arch
->get_mtime();
975 // For a file loaded from a script, don't record its argument serial number.
976 if (script_info
!= NULL
)
979 this->strtab_
->add(arch
->filename().c_str(), false, &filename_key
);
980 Incremental_archive_entry
* entry
=
981 new Incremental_archive_entry(filename_key
, arg_serial
, mtime
);
982 arch
->set_incremental_info(entry
);
984 if (script_info
!= NULL
)
986 Incremental_script_entry
* script_entry
= script_info
->incremental_info();
987 gold_assert(script_entry
!= NULL
);
988 script_entry
->add_object(entry
);
992 // Visitor class for processing the unused global symbols in a library.
993 // An instance of this class is passed to the library's
994 // for_all_unused_symbols() iterator, which will call the visit()
995 // function for each global symbol defined in each unused library
996 // member. We add those symbol names to the incremental info for the
999 class Unused_symbol_visitor
: public Library_base::Symbol_visitor_base
1002 Unused_symbol_visitor(Incremental_archive_entry
* entry
, Stringpool
* strtab
)
1003 : entry_(entry
), strtab_(strtab
)
1007 visit(const char* sym
)
1009 Stringpool::Key symbol_key
;
1010 this->strtab_
->add(sym
, true, &symbol_key
);
1011 this->entry_
->add_unused_global_symbol(symbol_key
);
1015 Incremental_archive_entry
* entry_
;
1016 Stringpool
* strtab_
;
1019 // Finish recording the input archive file ARCHIVE. This is called by the
1020 // Add_archive_symbols task after determining which archive members
1024 Incremental_inputs::report_archive_end(Library_base
* arch
)
1026 Incremental_archive_entry
* entry
= arch
->incremental_info();
1028 gold_assert(entry
!= NULL
);
1029 this->inputs_
.push_back(entry
);
1031 // Collect unused global symbols.
1032 Unused_symbol_visitor
v(entry
, this->strtab_
);
1033 arch
->for_all_unused_symbols(&v
);
1036 // Record the input object file OBJ. If ARCH is not NULL, attach
1037 // the object file to the archive. This is called by the
1038 // Add_symbols task after finding out the type of the file.
1041 Incremental_inputs::report_object(Object
* obj
, unsigned int arg_serial
,
1042 Library_base
* arch
, Script_info
* script_info
)
1044 Stringpool::Key filename_key
;
1045 Timespec mtime
= obj
->get_mtime();
1047 // For a file loaded from a script, don't record its argument serial number.
1048 if (script_info
!= NULL
)
1051 this->strtab_
->add(obj
->name().c_str(), false, &filename_key
);
1053 Incremental_input_entry
* input_entry
;
1055 this->current_object_
= obj
;
1057 if (!obj
->is_dynamic())
1059 this->current_object_entry_
=
1060 new Incremental_object_entry(filename_key
, obj
, arg_serial
, mtime
);
1061 input_entry
= this->current_object_entry_
;
1064 Incremental_archive_entry
* arch_entry
= arch
->incremental_info();
1065 gold_assert(arch_entry
!= NULL
);
1066 arch_entry
->add_object(this->current_object_entry_
);
1071 this->current_object_entry_
= NULL
;
1072 Stringpool::Key soname_key
;
1073 Dynobj
* dynobj
= obj
->dynobj();
1074 gold_assert(dynobj
!= NULL
);
1075 this->strtab_
->add(dynobj
->soname(), false, &soname_key
);
1076 input_entry
= new Incremental_dynobj_entry(filename_key
, soname_key
, obj
,
1080 if (obj
->is_in_system_directory())
1081 input_entry
->set_is_in_system_directory();
1083 if (obj
->as_needed())
1084 input_entry
->set_as_needed();
1086 this->inputs_
.push_back(input_entry
);
1088 if (script_info
!= NULL
)
1090 Incremental_script_entry
* script_entry
= script_info
->incremental_info();
1091 gold_assert(script_entry
!= NULL
);
1092 script_entry
->add_object(input_entry
);
1096 // Record an input section SHNDX from object file OBJ.
1099 Incremental_inputs::report_input_section(Object
* obj
, unsigned int shndx
,
1100 const char* name
, off_t sh_size
)
1102 Stringpool::Key key
= 0;
1105 this->strtab_
->add(name
, true, &key
);
1107 gold_assert(obj
== this->current_object_
);
1108 gold_assert(this->current_object_entry_
!= NULL
);
1109 this->current_object_entry_
->add_input_section(shndx
, key
, sh_size
);
1112 // Record a kept COMDAT group belonging to object file OBJ.
1115 Incremental_inputs::report_comdat_group(Object
* obj
, const char* name
)
1117 Stringpool::Key key
= 0;
1120 this->strtab_
->add(name
, true, &key
);
1121 gold_assert(obj
== this->current_object_
);
1122 gold_assert(this->current_object_entry_
!= NULL
);
1123 this->current_object_entry_
->add_comdat_group(key
);
1126 // Record that the input argument INPUT is a script SCRIPT. This is
1127 // called by read_script after parsing the script and reading the list
1128 // of inputs added by this script.
1131 Incremental_inputs::report_script(Script_info
* script
,
1132 unsigned int arg_serial
,
1135 Stringpool::Key filename_key
;
1137 this->strtab_
->add(script
->filename().c_str(), false, &filename_key
);
1138 Incremental_script_entry
* entry
=
1139 new Incremental_script_entry(filename_key
, arg_serial
, script
, mtime
);
1140 this->inputs_
.push_back(entry
);
1141 script
->set_incremental_info(entry
);
1144 // Finalize the incremental link information. Called from
1145 // Layout::finalize.
1148 Incremental_inputs::finalize()
1150 // Finalize the string table.
1151 this->strtab_
->set_string_offsets();
1154 // Create the .gnu_incremental_inputs, _symtab, and _relocs input sections.
1157 Incremental_inputs::create_data_sections(Symbol_table
* symtab
)
1159 switch (parameters
->size_and_endianness())
1161 #ifdef HAVE_TARGET_32_LITTLE
1162 case Parameters::TARGET_32_LITTLE
:
1163 this->inputs_section_
=
1164 new Output_section_incremental_inputs
<32, false>(this, symtab
);
1167 #ifdef HAVE_TARGET_32_BIG
1168 case Parameters::TARGET_32_BIG
:
1169 this->inputs_section_
=
1170 new Output_section_incremental_inputs
<32, true>(this, symtab
);
1173 #ifdef HAVE_TARGET_64_LITTLE
1174 case Parameters::TARGET_64_LITTLE
:
1175 this->inputs_section_
=
1176 new Output_section_incremental_inputs
<64, false>(this, symtab
);
1179 #ifdef HAVE_TARGET_64_BIG
1180 case Parameters::TARGET_64_BIG
:
1181 this->inputs_section_
=
1182 new Output_section_incremental_inputs
<64, true>(this, symtab
);
1188 this->symtab_section_
= new Output_data_space(4, "** incremental_symtab");
1189 this->relocs_section_
= new Output_data_space(4, "** incremental_relocs");
1190 this->got_plt_section_
= new Output_data_space(4, "** incremental_got_plt");
1193 // Return the sh_entsize value for the .gnu_incremental_relocs section.
1195 Incremental_inputs::relocs_entsize() const
1197 return 8 + 2 * parameters
->target().get_size() / 8;
1200 // Class Output_section_incremental_inputs.
1202 // Finalize the offsets for each input section and supplemental info block,
1203 // and set the final data size of the incremental output sections.
1205 template<int size
, bool big_endian
>
1207 Output_section_incremental_inputs
<size
, big_endian
>::set_final_data_size()
1209 const Incremental_inputs
* inputs
= this->inputs_
;
1210 const unsigned int sizeof_addr
= size
/ 8;
1211 const unsigned int rel_size
= 8 + 2 * sizeof_addr
;
1213 // Offset of each input entry.
1214 unsigned int input_offset
= this->header_size
;
1216 // Offset of each supplemental info block.
1217 unsigned int file_index
= 0;
1218 unsigned int info_offset
= this->header_size
;
1219 info_offset
+= this->input_entry_size
* inputs
->input_file_count();
1221 // Count each input file and its supplemental information block.
1222 for (Incremental_inputs::Input_list::const_iterator p
=
1223 inputs
->input_files().begin();
1224 p
!= inputs
->input_files().end();
1227 // Set the index and offset of the input file entry.
1228 (*p
)->set_offset(file_index
, input_offset
);
1230 input_offset
+= this->input_entry_size
;
1232 // Set the offset of the supplemental info block.
1233 switch ((*p
)->type())
1235 case INCREMENTAL_INPUT_SCRIPT
:
1237 Incremental_script_entry
*entry
= (*p
)->script_entry();
1238 gold_assert(entry
!= NULL
);
1239 (*p
)->set_info_offset(info_offset
);
1243 info_offset
+= (entry
->get_object_count() * 4);
1246 case INCREMENTAL_INPUT_OBJECT
:
1247 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
1249 Incremental_object_entry
* entry
= (*p
)->object_entry();
1250 gold_assert(entry
!= NULL
);
1251 (*p
)->set_info_offset(info_offset
);
1252 // Input section count, global symbol count, local symbol offset,
1253 // local symbol count, first dynamic reloc, dynamic reloc count,
1254 // comdat group count.
1256 // Each input section.
1257 info_offset
+= (entry
->get_input_section_count()
1258 * (8 + 2 * sizeof_addr
));
1259 // Each global symbol.
1260 const Object::Symbols
* syms
= entry
->object()->get_global_symbols();
1261 info_offset
+= syms
->size() * 20;
1262 // Each comdat group.
1263 info_offset
+= entry
->get_comdat_group_count() * 4;
1266 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
1268 Incremental_dynobj_entry
* entry
= (*p
)->dynobj_entry();
1269 gold_assert(entry
!= NULL
);
1270 (*p
)->set_info_offset(info_offset
);
1271 // Global symbol count, soname index.
1273 // Each global symbol.
1274 const Object::Symbols
* syms
= entry
->object()->get_global_symbols();
1275 gold_assert(syms
!= NULL
);
1276 unsigned int nsyms
= syms
->size();
1277 unsigned int nsyms_out
= 0;
1278 for (unsigned int i
= 0; i
< nsyms
; ++i
)
1280 const Symbol
* sym
= (*syms
)[i
];
1283 if (sym
->is_forwarder())
1284 sym
= this->symtab_
->resolve_forwards(sym
);
1285 if (sym
->symtab_index() != -1U)
1288 info_offset
+= nsyms_out
* 4;
1291 case INCREMENTAL_INPUT_ARCHIVE
:
1293 Incremental_archive_entry
* entry
= (*p
)->archive_entry();
1294 gold_assert(entry
!= NULL
);
1295 (*p
)->set_info_offset(info_offset
);
1296 // Member count + unused global symbol count.
1299 info_offset
+= (entry
->get_member_count() * 4);
1300 // Each global symbol.
1301 info_offset
+= (entry
->get_unused_global_symbol_count() * 4);
1309 this->set_data_size(info_offset
);
1311 // Set the size of the .gnu_incremental_symtab section.
1312 inputs
->symtab_section()->set_current_data_size(this->symtab_
->output_count()
1313 * sizeof(unsigned int));
1315 // Set the size of the .gnu_incremental_relocs section.
1316 inputs
->relocs_section()->set_current_data_size(inputs
->get_reloc_count()
1319 // Set the size of the .gnu_incremental_got_plt section.
1320 Sized_target
<size
, big_endian
>* target
=
1321 parameters
->sized_target
<size
, big_endian
>();
1322 unsigned int got_count
= target
->got_entry_count();
1323 unsigned int plt_count
= target
->plt_entry_count();
1324 unsigned int got_plt_size
= 8; // GOT entry count, PLT entry count.
1325 got_plt_size
= (got_plt_size
+ got_count
+ 3) & ~3; // GOT type array.
1326 got_plt_size
+= got_count
* 8 + plt_count
* 4; // GOT array, PLT array.
1327 inputs
->got_plt_section()->set_current_data_size(got_plt_size
);
1330 // Write the contents of the .gnu_incremental_inputs and
1331 // .gnu_incremental_symtab sections.
1333 template<int size
, bool big_endian
>
1335 Output_section_incremental_inputs
<size
, big_endian
>::do_write(Output_file
* of
)
1337 const Incremental_inputs
* inputs
= this->inputs_
;
1338 Stringpool
* strtab
= inputs
->get_stringpool();
1340 // Get a view into the .gnu_incremental_inputs section.
1341 const off_t off
= this->offset();
1342 const off_t oview_size
= this->data_size();
1343 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1344 unsigned char* pov
= oview
;
1346 // Get a view into the .gnu_incremental_symtab section.
1347 const off_t symtab_off
= inputs
->symtab_section()->offset();
1348 const off_t symtab_size
= inputs
->symtab_section()->data_size();
1349 unsigned char* const symtab_view
= of
->get_output_view(symtab_off
,
1352 // Allocate an array of linked list heads for the .gnu_incremental_symtab
1353 // section. Each element corresponds to a global symbol in the output
1354 // symbol table, and points to the head of the linked list that threads
1355 // through the object file input entries. The value of each element
1356 // is the section-relative offset to a global symbol entry in a
1357 // supplemental information block.
1358 unsigned int global_sym_count
= this->symtab_
->output_count();
1359 unsigned int* global_syms
= new unsigned int[global_sym_count
];
1360 memset(global_syms
, 0, global_sym_count
* sizeof(unsigned int));
1362 // Write the section header.
1363 Stringpool::Key command_line_key
= inputs
->command_line_key();
1364 pov
= this->write_header(pov
, inputs
->input_file_count(),
1365 strtab
->get_offset_from_key(command_line_key
));
1367 // Write the list of input files.
1368 pov
= this->write_input_files(oview
, pov
, strtab
);
1370 // Write the supplemental information blocks for each input file.
1371 pov
= this->write_info_blocks(oview
, pov
, strtab
, global_syms
,
1374 gold_assert(pov
- oview
== oview_size
);
1376 // Write the .gnu_incremental_symtab section.
1377 gold_assert(global_sym_count
* 4 == symtab_size
);
1378 this->write_symtab(symtab_view
, global_syms
, global_sym_count
);
1380 delete[] global_syms
;
1382 // Write the .gnu_incremental_got_plt section.
1383 const off_t got_plt_off
= inputs
->got_plt_section()->offset();
1384 const off_t got_plt_size
= inputs
->got_plt_section()->data_size();
1385 unsigned char* const got_plt_view
= of
->get_output_view(got_plt_off
,
1387 this->write_got_plt(got_plt_view
, got_plt_size
);
1389 of
->write_output_view(off
, oview_size
, oview
);
1390 of
->write_output_view(symtab_off
, symtab_size
, symtab_view
);
1391 of
->write_output_view(got_plt_off
, got_plt_size
, got_plt_view
);
1394 // Write the section header: version, input file count, offset of command line
1395 // in the string table, and 4 bytes of padding.
1397 template<int size
, bool big_endian
>
1399 Output_section_incremental_inputs
<size
, big_endian
>::write_header(
1401 unsigned int input_file_count
,
1402 section_offset_type command_line_offset
)
1404 Swap32::writeval(pov
, INCREMENTAL_LINK_VERSION
);
1405 Swap32::writeval(pov
+ 4, input_file_count
);
1406 Swap32::writeval(pov
+ 8, command_line_offset
);
1407 Swap32::writeval(pov
+ 12, 0);
1408 return pov
+ this->header_size
;
1411 // Write the input file entries.
1413 template<int size
, bool big_endian
>
1415 Output_section_incremental_inputs
<size
, big_endian
>::write_input_files(
1416 unsigned char* oview
,
1420 const Incremental_inputs
* inputs
= this->inputs_
;
1422 for (Incremental_inputs::Input_list::const_iterator p
=
1423 inputs
->input_files().begin();
1424 p
!= inputs
->input_files().end();
1427 gold_assert(static_cast<unsigned int>(pov
- oview
) == (*p
)->get_offset());
1428 section_offset_type filename_offset
=
1429 strtab
->get_offset_from_key((*p
)->get_filename_key());
1430 const Timespec
& mtime
= (*p
)->get_mtime();
1431 unsigned int flags
= (*p
)->type();
1432 if ((*p
)->is_in_system_directory())
1433 flags
|= INCREMENTAL_INPUT_IN_SYSTEM_DIR
;
1434 if ((*p
)->as_needed())
1435 flags
|= INCREMENTAL_INPUT_AS_NEEDED
;
1436 Swap32::writeval(pov
, filename_offset
);
1437 Swap32::writeval(pov
+ 4, (*p
)->get_info_offset());
1438 Swap64::writeval(pov
+ 8, mtime
.seconds
);
1439 Swap32::writeval(pov
+ 16, mtime
.nanoseconds
);
1440 Swap16::writeval(pov
+ 20, flags
);
1441 Swap16::writeval(pov
+ 22, (*p
)->arg_serial());
1442 pov
+= this->input_entry_size
;
1447 // Write the supplemental information blocks.
1449 template<int size
, bool big_endian
>
1451 Output_section_incremental_inputs
<size
, big_endian
>::write_info_blocks(
1452 unsigned char* oview
,
1455 unsigned int* global_syms
,
1456 unsigned int global_sym_count
)
1458 const Incremental_inputs
* inputs
= this->inputs_
;
1459 unsigned int first_global_index
= this->symtab_
->first_global_index();
1461 for (Incremental_inputs::Input_list::const_iterator p
=
1462 inputs
->input_files().begin();
1463 p
!= inputs
->input_files().end();
1466 switch ((*p
)->type())
1468 case INCREMENTAL_INPUT_SCRIPT
:
1470 gold_assert(static_cast<unsigned int>(pov
- oview
)
1471 == (*p
)->get_info_offset());
1472 Incremental_script_entry
* entry
= (*p
)->script_entry();
1473 gold_assert(entry
!= NULL
);
1475 // Write the object count.
1476 unsigned int nobjects
= entry
->get_object_count();
1477 Swap32::writeval(pov
, nobjects
);
1480 // For each object, write the offset to its input file entry.
1481 for (unsigned int i
= 0; i
< nobjects
; ++i
)
1483 Incremental_input_entry
* obj
= entry
->get_object(i
);
1484 Swap32::writeval(pov
, obj
->get_offset());
1490 case INCREMENTAL_INPUT_OBJECT
:
1491 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
1493 gold_assert(static_cast<unsigned int>(pov
- oview
)
1494 == (*p
)->get_info_offset());
1495 Incremental_object_entry
* entry
= (*p
)->object_entry();
1496 gold_assert(entry
!= NULL
);
1497 const Object
* obj
= entry
->object();
1498 const Relobj
* relobj
= static_cast<const Relobj
*>(obj
);
1499 const Object::Symbols
* syms
= obj
->get_global_symbols();
1500 // Write the input section count and global symbol count.
1501 unsigned int nsections
= entry
->get_input_section_count();
1502 unsigned int nsyms
= syms
->size();
1503 off_t locals_offset
= relobj
->local_symbol_offset();
1504 unsigned int nlocals
= relobj
->output_local_symbol_count();
1505 unsigned int first_dynrel
= relobj
->first_dyn_reloc();
1506 unsigned int ndynrel
= relobj
->dyn_reloc_count();
1507 unsigned int ncomdat
= entry
->get_comdat_group_count();
1508 Swap32::writeval(pov
, nsections
);
1509 Swap32::writeval(pov
+ 4, nsyms
);
1510 Swap32::writeval(pov
+ 8, static_cast<unsigned int>(locals_offset
));
1511 Swap32::writeval(pov
+ 12, nlocals
);
1512 Swap32::writeval(pov
+ 16, first_dynrel
);
1513 Swap32::writeval(pov
+ 20, ndynrel
);
1514 Swap32::writeval(pov
+ 24, ncomdat
);
1517 // Build a temporary array to map input section indexes
1518 // from the original object file index to the index in the
1519 // incremental info table.
1520 unsigned int* index_map
= new unsigned int[obj
->shnum()];
1521 memset(index_map
, 0, obj
->shnum() * sizeof(unsigned int));
1523 // For each input section, write the name, output section index,
1524 // offset within output section, and input section size.
1525 for (unsigned int i
= 0; i
< nsections
; i
++)
1527 unsigned int shndx
= entry
->get_input_section_index(i
);
1528 index_map
[shndx
] = i
+ 1;
1529 Stringpool::Key key
= entry
->get_input_section_name_key(i
);
1530 off_t name_offset
= 0;
1532 name_offset
= strtab
->get_offset_from_key(key
);
1534 off_t out_offset
= 0;
1536 Output_section
* os
= obj
->output_section(shndx
);
1539 out_shndx
= os
->out_shndx();
1540 out_offset
= obj
->output_section_offset(shndx
);
1541 sh_size
= entry
->get_input_section_size(i
);
1543 Swap32::writeval(pov
, name_offset
);
1544 Swap32::writeval(pov
+ 4, out_shndx
);
1545 Swap::writeval(pov
+ 8, out_offset
);
1546 Swap::writeval(pov
+ 8 + sizeof_addr
, sh_size
);
1547 pov
+= 8 + 2 * sizeof_addr
;
1550 // For each global symbol, write its associated relocations,
1551 // add it to the linked list of globals, then write the
1552 // supplemental information: global symbol table index,
1553 // input section index, linked list chain pointer, relocation
1554 // count, and offset to the relocations.
1555 for (unsigned int i
= 0; i
< nsyms
; i
++)
1557 const Symbol
* sym
= (*syms
)[i
];
1558 if (sym
->is_forwarder())
1559 sym
= this->symtab_
->resolve_forwards(sym
);
1560 unsigned int shndx
= 0;
1561 if (sym
->source() != Symbol::FROM_OBJECT
)
1563 // The symbol was defined by the linker (e.g., common).
1564 // We mark these symbols with a special SHNDX of -1,
1565 // but exclude linker-predefined symbols and symbols
1566 // copied from shared objects.
1567 if (!sym
->is_predefined()
1568 && !sym
->is_copied_from_dynobj())
1571 else if (sym
->object() == obj
&& sym
->is_defined())
1574 unsigned int orig_shndx
= sym
->shndx(&is_ordinary
);
1576 shndx
= index_map
[orig_shndx
];
1580 unsigned int symtab_index
= sym
->symtab_index();
1581 unsigned int chain
= 0;
1582 unsigned int first_reloc
= 0;
1583 unsigned int nrelocs
= obj
->get_incremental_reloc_count(i
);
1586 gold_assert(symtab_index
!= -1U
1587 && (symtab_index
- first_global_index
1588 < global_sym_count
));
1589 first_reloc
= obj
->get_incremental_reloc_base(i
);
1590 chain
= global_syms
[symtab_index
- first_global_index
];
1591 global_syms
[symtab_index
- first_global_index
] =
1594 Swap32::writeval(pov
, symtab_index
);
1595 Swap32::writeval(pov
+ 4, shndx
);
1596 Swap32::writeval(pov
+ 8, chain
);
1597 Swap32::writeval(pov
+ 12, nrelocs
);
1598 Swap32::writeval(pov
+ 16, first_reloc
* 3 * sizeof_addr
);
1602 // For each kept COMDAT group, write the group signature.
1603 for (unsigned int i
= 0; i
< ncomdat
; i
++)
1605 Stringpool::Key key
= entry
->get_comdat_signature_key(i
);
1606 off_t name_offset
= 0;
1608 name_offset
= strtab
->get_offset_from_key(key
);
1609 Swap32::writeval(pov
, name_offset
);
1617 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
1619 gold_assert(static_cast<unsigned int>(pov
- oview
)
1620 == (*p
)->get_info_offset());
1621 Incremental_dynobj_entry
* entry
= (*p
)->dynobj_entry();
1622 gold_assert(entry
!= NULL
);
1623 Object
* obj
= entry
->object();
1624 Dynobj
* dynobj
= obj
->dynobj();
1625 gold_assert(dynobj
!= NULL
);
1626 const Object::Symbols
* syms
= obj
->get_global_symbols();
1628 // Write the soname string table index.
1629 section_offset_type soname_offset
=
1630 strtab
->get_offset_from_key(entry
->get_soname_key());
1631 Swap32::writeval(pov
, soname_offset
);
1634 // Skip the global symbol count for now.
1635 unsigned char* orig_pov
= pov
;
1638 // For each global symbol, write the global symbol table index.
1639 unsigned int nsyms
= syms
->size();
1640 unsigned int nsyms_out
= 0;
1641 for (unsigned int i
= 0; i
< nsyms
; i
++)
1643 const Symbol
* sym
= (*syms
)[i
];
1646 if (sym
->is_forwarder())
1647 sym
= this->symtab_
->resolve_forwards(sym
);
1648 if (sym
->symtab_index() == -1U)
1650 unsigned int flags
= 0;
1651 if (sym
->source() == Symbol::FROM_OBJECT
1652 && sym
->object() == obj
1653 && sym
->is_defined())
1654 flags
= INCREMENTAL_SHLIB_SYM_DEF
;
1655 else if (sym
->is_copied_from_dynobj()
1656 && this->symtab_
->get_copy_source(sym
) == dynobj
)
1657 flags
= INCREMENTAL_SHLIB_SYM_COPY
;
1658 flags
<<= INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT
;
1659 Swap32::writeval(pov
, sym
->symtab_index() | flags
);
1664 // Now write the global symbol count.
1665 Swap32::writeval(orig_pov
, nsyms_out
);
1669 case INCREMENTAL_INPUT_ARCHIVE
:
1671 gold_assert(static_cast<unsigned int>(pov
- oview
)
1672 == (*p
)->get_info_offset());
1673 Incremental_archive_entry
* entry
= (*p
)->archive_entry();
1674 gold_assert(entry
!= NULL
);
1676 // Write the member count and unused global symbol count.
1677 unsigned int nmembers
= entry
->get_member_count();
1678 unsigned int nsyms
= entry
->get_unused_global_symbol_count();
1679 Swap32::writeval(pov
, nmembers
);
1680 Swap32::writeval(pov
+ 4, nsyms
);
1683 // For each member, write the offset to its input file entry.
1684 for (unsigned int i
= 0; i
< nmembers
; ++i
)
1686 Incremental_object_entry
* member
= entry
->get_member(i
);
1687 Swap32::writeval(pov
, member
->get_offset());
1691 // For each global symbol, write the name offset.
1692 for (unsigned int i
= 0; i
< nsyms
; ++i
)
1694 Stringpool::Key key
= entry
->get_unused_global_symbol(i
);
1695 Swap32::writeval(pov
, strtab
->get_offset_from_key(key
));
1708 // Write the contents of the .gnu_incremental_symtab section.
1710 template<int size
, bool big_endian
>
1712 Output_section_incremental_inputs
<size
, big_endian
>::write_symtab(
1714 unsigned int* global_syms
,
1715 unsigned int global_sym_count
)
1717 for (unsigned int i
= 0; i
< global_sym_count
; ++i
)
1719 Swap32::writeval(pov
, global_syms
[i
]);
1724 // This struct holds the view information needed to write the
1725 // .gnu_incremental_got_plt section.
1727 struct Got_plt_view_info
1729 // Start of the GOT type array in the output view.
1730 unsigned char* got_type_p
;
1731 // Start of the GOT descriptor array in the output view.
1732 unsigned char* got_desc_p
;
1733 // Start of the PLT descriptor array in the output view.
1734 unsigned char* plt_desc_p
;
1735 // Number of GOT entries.
1736 unsigned int got_count
;
1737 // Number of PLT entries.
1738 unsigned int plt_count
;
1739 // Offset of the first non-reserved PLT entry (this is a target-dependent value).
1740 unsigned int first_plt_entry_offset
;
1741 // Size of a PLT entry (this is a target-dependent value).
1742 unsigned int plt_entry_size
;
1743 // Symbol index to write in the GOT descriptor array. For global symbols,
1744 // this is the global symbol table index; for local symbols, it is the
1745 // local symbol table index.
1746 unsigned int sym_index
;
1747 // Input file index to write in the GOT descriptor array. For global
1748 // symbols, this is 0; for local symbols, it is the index of the input
1749 // file entry in the .gnu_incremental_inputs section.
1750 unsigned int input_index
;
1753 // Functor class for processing a GOT offset list for local symbols.
1754 // Writes the GOT type and symbol index into the GOT type and descriptor
1755 // arrays in the output section.
1757 template<int size
, bool big_endian
>
1758 class Local_got_offset_visitor
: public Got_offset_list::Visitor
1761 Local_got_offset_visitor(struct Got_plt_view_info
& info
)
1766 visit(unsigned int got_type
, unsigned int got_offset
)
1768 unsigned int got_index
= got_offset
/ this->got_entry_size_
;
1769 gold_assert(got_index
< this->info_
.got_count
);
1770 // We can only handle GOT entry types in the range 0..0x7e
1771 // because we use a byte array to store them, and we use the
1772 // high bit to flag a local symbol.
1773 gold_assert(got_type
< 0x7f);
1774 this->info_
.got_type_p
[got_index
] = got_type
| 0x80;
1775 unsigned char* pov
= this->info_
.got_desc_p
+ got_index
* 8;
1776 elfcpp::Swap
<32, big_endian
>::writeval(pov
, this->info_
.sym_index
);
1777 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, this->info_
.input_index
);
1781 static const unsigned int got_entry_size_
= size
/ 8;
1782 struct Got_plt_view_info
& info_
;
1785 // Functor class for processing a GOT offset list. Writes the GOT type
1786 // and symbol index into the GOT type and descriptor arrays in the output
1789 template<int size
, bool big_endian
>
1790 class Global_got_offset_visitor
: public Got_offset_list::Visitor
1793 Global_got_offset_visitor(struct Got_plt_view_info
& info
)
1798 visit(unsigned int got_type
, unsigned int got_offset
)
1800 unsigned int got_index
= got_offset
/ this->got_entry_size_
;
1801 gold_assert(got_index
< this->info_
.got_count
);
1802 // We can only handle GOT entry types in the range 0..0x7e
1803 // because we use a byte array to store them, and we use the
1804 // high bit to flag a local symbol.
1805 gold_assert(got_type
< 0x7f);
1806 this->info_
.got_type_p
[got_index
] = got_type
;
1807 unsigned char* pov
= this->info_
.got_desc_p
+ got_index
* 8;
1808 elfcpp::Swap
<32, big_endian
>::writeval(pov
, this->info_
.sym_index
);
1809 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, 0);
1813 static const unsigned int got_entry_size_
= size
/ 8;
1814 struct Got_plt_view_info
& info_
;
1817 // Functor class for processing the global symbol table. Processes the
1818 // GOT offset list for the symbol, and writes the symbol table index
1819 // into the PLT descriptor array in the output section.
1821 template<int size
, bool big_endian
>
1822 class Global_symbol_visitor_got_plt
1825 Global_symbol_visitor_got_plt(struct Got_plt_view_info
& info
)
1830 operator()(const Sized_symbol
<size
>* sym
)
1832 typedef Global_got_offset_visitor
<size
, big_endian
> Got_visitor
;
1833 const Got_offset_list
* got_offsets
= sym
->got_offset_list();
1834 if (got_offsets
!= NULL
)
1836 this->info_
.sym_index
= sym
->symtab_index();
1837 this->info_
.input_index
= 0;
1838 Got_visitor
v(this->info_
);
1839 got_offsets
->for_all_got_offsets(&v
);
1841 if (sym
->has_plt_offset())
1843 unsigned int plt_index
=
1844 ((sym
->plt_offset() - this->info_
.first_plt_entry_offset
)
1845 / this->info_
.plt_entry_size
);
1846 gold_assert(plt_index
< this->info_
.plt_count
);
1847 unsigned char* pov
= this->info_
.plt_desc_p
+ plt_index
* 4;
1848 elfcpp::Swap
<32, big_endian
>::writeval(pov
, sym
->symtab_index());
1853 struct Got_plt_view_info
& info_
;
1856 // Write the contents of the .gnu_incremental_got_plt section.
1858 template<int size
, bool big_endian
>
1860 Output_section_incremental_inputs
<size
, big_endian
>::write_got_plt(
1864 Sized_target
<size
, big_endian
>* target
=
1865 parameters
->sized_target
<size
, big_endian
>();
1867 // Set up the view information for the functors.
1868 struct Got_plt_view_info view_info
;
1869 view_info
.got_count
= target
->got_entry_count();
1870 view_info
.plt_count
= target
->plt_entry_count();
1871 view_info
.first_plt_entry_offset
= target
->first_plt_entry_offset();
1872 view_info
.plt_entry_size
= target
->plt_entry_size();
1873 view_info
.got_type_p
= pov
+ 8;
1874 view_info
.got_desc_p
= (view_info
.got_type_p
1875 + ((view_info
.got_count
+ 3) & ~3));
1876 view_info
.plt_desc_p
= view_info
.got_desc_p
+ view_info
.got_count
* 8;
1878 gold_assert(pov
+ view_size
==
1879 view_info
.plt_desc_p
+ view_info
.plt_count
* 4);
1881 // Write the section header.
1882 Swap32::writeval(pov
, view_info
.got_count
);
1883 Swap32::writeval(pov
+ 4, view_info
.plt_count
);
1885 // Initialize the GOT type array to 0xff (reserved).
1886 memset(view_info
.got_type_p
, 0xff, view_info
.got_count
);
1888 // Write the incremental GOT descriptors for local symbols.
1889 typedef Local_got_offset_visitor
<size
, big_endian
> Got_visitor
;
1890 for (Incremental_inputs::Input_list::const_iterator p
=
1891 this->inputs_
->input_files().begin();
1892 p
!= this->inputs_
->input_files().end();
1895 if ((*p
)->type() != INCREMENTAL_INPUT_OBJECT
1896 && (*p
)->type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER
)
1898 Incremental_object_entry
* entry
= (*p
)->object_entry();
1899 gold_assert(entry
!= NULL
);
1900 const Object
* obj
= entry
->object();
1901 gold_assert(obj
!= NULL
);
1902 view_info
.input_index
= (*p
)->get_file_index();
1903 Got_visitor
v(view_info
);
1904 obj
->for_all_local_got_entries(&v
);
1907 // Write the incremental GOT and PLT descriptors for global symbols.
1908 typedef Global_symbol_visitor_got_plt
<size
, big_endian
> Symbol_visitor
;
1909 symtab_
->for_all_symbols
<size
, Symbol_visitor
>(Symbol_visitor(view_info
));
1912 // Class Sized_relobj_incr. Most of these methods are not used for
1913 // Incremental objects, but are required to be implemented by the
1914 // base class Object.
1916 template<int size
, bool big_endian
>
1917 Sized_relobj_incr
<size
, big_endian
>::Sized_relobj_incr(
1918 const std::string
& name
,
1919 Sized_incremental_binary
<size
, big_endian
>* ibase
,
1920 unsigned int input_file_index
)
1921 : Sized_relobj
<size
, big_endian
>(name
, NULL
), ibase_(ibase
),
1922 input_file_index_(input_file_index
),
1923 input_reader_(ibase
->inputs_reader().input_file(input_file_index
)),
1924 local_symbol_count_(0), output_local_dynsym_count_(0),
1925 local_symbol_index_(0), local_symbol_offset_(0), local_dynsym_offset_(0),
1926 symbols_(), incr_reloc_offset_(-1U), incr_reloc_count_(0),
1927 incr_reloc_output_index_(0), incr_relocs_(NULL
), local_symbols_()
1929 if (this->input_reader_
.is_in_system_directory())
1930 this->set_is_in_system_directory();
1931 const unsigned int shnum
= this->input_reader_
.get_input_section_count() + 1;
1932 this->set_shnum(shnum
);
1933 ibase
->set_input_object(input_file_index
, this);
1936 // Read the symbols.
1938 template<int size
, bool big_endian
>
1940 Sized_relobj_incr
<size
, big_endian
>::do_read_symbols(Read_symbols_data
*)
1945 // Lay out the input sections.
1947 template<int size
, bool big_endian
>
1949 Sized_relobj_incr
<size
, big_endian
>::do_layout(
1954 const unsigned int shnum
= this->shnum();
1955 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
1956 gold_assert(incremental_inputs
!= NULL
);
1957 Output_sections
& out_sections(this->output_sections());
1958 out_sections
.resize(shnum
);
1959 this->section_offsets().resize(shnum
);
1960 for (unsigned int i
= 1; i
< shnum
; i
++)
1962 typename
Input_entry_reader::Input_section_info sect
=
1963 this->input_reader_
.get_input_section(i
- 1);
1964 // Add the section to the incremental inputs layout.
1965 incremental_inputs
->report_input_section(this, i
, sect
.name
,
1967 if (sect
.output_shndx
== 0 || sect
.sh_offset
== -1)
1969 Output_section
* os
= this->ibase_
->output_section(sect
.output_shndx
);
1970 gold_assert(os
!= NULL
);
1971 out_sections
[i
] = os
;
1972 this->section_offsets()[i
] = static_cast<Address
>(sect
.sh_offset
);
1975 // Process the COMDAT groups.
1976 unsigned int ncomdat
= this->input_reader_
.get_comdat_group_count();
1977 for (unsigned int i
= 0; i
< ncomdat
; i
++)
1979 const char* signature
= this->input_reader_
.get_comdat_group_signature(i
);
1980 if (signature
== NULL
|| signature
[0] == '\0')
1981 this->error(_("COMDAT group has no signature"));
1982 bool keep
= layout
->find_or_add_kept_section(signature
, this, i
, true,
1985 this->error(_("COMDAT group %s included twice in incremental link"),
1990 // Layout sections whose layout was deferred while waiting for
1991 // input files from a plugin.
1992 template<int size
, bool big_endian
>
1994 Sized_relobj_incr
<size
, big_endian
>::do_layout_deferred_sections(Layout
*)
1998 // Add the symbols to the symbol table.
2000 template<int size
, bool big_endian
>
2002 Sized_relobj_incr
<size
, big_endian
>::do_add_symbols(
2003 Symbol_table
* symtab
,
2007 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2008 unsigned char symbuf
[sym_size
];
2009 elfcpp::Sym
<size
, big_endian
> sym(symbuf
);
2010 elfcpp::Sym_write
<size
, big_endian
> osym(symbuf
);
2012 typedef typename
elfcpp::Elf_types
<size
>::Elf_WXword Elf_size_type
;
2014 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2015 this->symbols_
.resize(nsyms
);
2017 Incremental_binary::View
symtab_view(NULL
);
2018 unsigned int symtab_count
;
2019 elfcpp::Elf_strtab
strtab(NULL
, 0);
2020 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2022 Incremental_symtab_reader
<big_endian
> isymtab(this->ibase_
->symtab_reader());
2023 unsigned int isym_count
= isymtab
.symbol_count();
2024 unsigned int first_global
= symtab_count
- isym_count
;
2026 const unsigned char* sym_p
;
2027 for (unsigned int i
= 0; i
< nsyms
; ++i
)
2029 Incremental_global_symbol_reader
<big_endian
> info
=
2030 this->input_reader_
.get_global_symbol_reader(i
);
2031 unsigned int output_symndx
= info
.output_symndx();
2032 sym_p
= symtab_view
.data() + output_symndx
* sym_size
;
2033 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
2035 if (!strtab
.get_c_string(gsym
.get_st_name(), &name
))
2038 typename
elfcpp::Elf_types
<size
>::Elf_Addr v
= gsym
.get_st_value();
2039 unsigned int shndx
= gsym
.get_st_shndx();
2040 elfcpp::STB st_bind
= gsym
.get_st_bind();
2041 elfcpp::STT st_type
= gsym
.get_st_type();
2043 // Local hidden symbols start out as globals, but get converted to
2044 // to local during output.
2045 if (st_bind
== elfcpp::STB_LOCAL
)
2046 st_bind
= elfcpp::STB_GLOBAL
;
2048 unsigned int input_shndx
= info
.shndx();
2049 if (input_shndx
== 0 || input_shndx
== -1U)
2051 shndx
= elfcpp::SHN_UNDEF
;
2054 else if (shndx
!= elfcpp::SHN_ABS
)
2056 // Find the input section and calculate the section-relative value.
2057 gold_assert(shndx
!= elfcpp::SHN_UNDEF
);
2058 Output_section
* os
= this->ibase_
->output_section(shndx
);
2059 gold_assert(os
!= NULL
&& os
->has_fixed_layout());
2060 typename
Input_entry_reader::Input_section_info sect
=
2061 this->input_reader_
.get_input_section(input_shndx
- 1);
2062 gold_assert(sect
.output_shndx
== shndx
);
2063 if (st_type
!= elfcpp::STT_TLS
)
2065 v
-= sect
.sh_offset
;
2066 shndx
= input_shndx
;
2069 osym
.put_st_name(0);
2070 osym
.put_st_value(v
);
2071 osym
.put_st_size(gsym
.get_st_size());
2072 osym
.put_st_info(st_bind
, st_type
);
2073 osym
.put_st_other(gsym
.get_st_other());
2074 osym
.put_st_shndx(shndx
);
2076 Symbol
* res
= symtab
->add_from_incrobj(this, name
, NULL
, &sym
);
2078 // If this is a linker-defined symbol that hasn't yet been defined,
2080 if (input_shndx
== -1U && !res
->is_defined())
2082 shndx
= gsym
.get_st_shndx();
2083 v
= gsym
.get_st_value();
2084 Elf_size_type symsize
= gsym
.get_st_size();
2085 if (shndx
== elfcpp::SHN_ABS
)
2087 symtab
->define_as_constant(name
, NULL
,
2088 Symbol_table::INCREMENTAL_BASE
,
2089 v
, symsize
, st_type
, st_bind
,
2090 gsym
.get_st_visibility(), 0,
2095 Output_section
* os
= this->ibase_
->output_section(shndx
);
2096 gold_assert(os
!= NULL
&& os
->has_fixed_layout());
2099 os
->reserve(v
, symsize
);
2100 symtab
->define_in_output_data(name
, NULL
,
2101 Symbol_table::INCREMENTAL_BASE
,
2102 os
, v
, symsize
, st_type
, st_bind
,
2103 gsym
.get_st_visibility(), 0,
2108 this->symbols_
[i
] = res
;
2109 this->ibase_
->add_global_symbol(output_symndx
- first_global
, res
);
2113 // Return TRUE if we should include this object from an archive library.
2115 template<int size
, bool big_endian
>
2116 Archive::Should_include
2117 Sized_relobj_incr
<size
, big_endian
>::do_should_include_member(
2126 // Iterate over global symbols, calling a visitor class V for each.
2128 template<int size
, bool big_endian
>
2130 Sized_relobj_incr
<size
, big_endian
>::do_for_all_global_symbols(
2132 Library_base::Symbol_visitor_base
*)
2134 // This routine is not used for incremental objects.
2137 // Get the size of a section.
2139 template<int size
, bool big_endian
>
2141 Sized_relobj_incr
<size
, big_endian
>::do_section_size(unsigned int)
2146 // Get the name of a section.
2148 template<int size
, bool big_endian
>
2150 Sized_relobj_incr
<size
, big_endian
>::do_section_name(unsigned int)
2155 // Return a view of the contents of a section.
2157 template<int size
, bool big_endian
>
2159 Sized_relobj_incr
<size
, big_endian
>::do_section_contents(unsigned int)
2164 // Return section flags.
2166 template<int size
, bool big_endian
>
2168 Sized_relobj_incr
<size
, big_endian
>::do_section_flags(unsigned int)
2173 // Return section entsize.
2175 template<int size
, bool big_endian
>
2177 Sized_relobj_incr
<size
, big_endian
>::do_section_entsize(unsigned int)
2182 // Return section address.
2184 template<int size
, bool big_endian
>
2186 Sized_relobj_incr
<size
, big_endian
>::do_section_address(unsigned int)
2191 // Return section type.
2193 template<int size
, bool big_endian
>
2195 Sized_relobj_incr
<size
, big_endian
>::do_section_type(unsigned int)
2200 // Return the section link field.
2202 template<int size
, bool big_endian
>
2204 Sized_relobj_incr
<size
, big_endian
>::do_section_link(unsigned int)
2209 // Return the section link field.
2211 template<int size
, bool big_endian
>
2213 Sized_relobj_incr
<size
, big_endian
>::do_section_info(unsigned int)
2218 // Return the section alignment.
2220 template<int size
, bool big_endian
>
2222 Sized_relobj_incr
<size
, big_endian
>::do_section_addralign(unsigned int)
2227 // Return the Xindex structure to use.
2229 template<int size
, bool big_endian
>
2231 Sized_relobj_incr
<size
, big_endian
>::do_initialize_xindex()
2236 // Get symbol counts.
2238 template<int size
, bool big_endian
>
2240 Sized_relobj_incr
<size
, big_endian
>::do_get_global_symbol_counts(
2241 const Symbol_table
*, size_t*, size_t*) const
2248 template<int size
, bool big_endian
>
2250 Sized_relobj_incr
<size
, big_endian
>::do_read_relocs(Read_relocs_data
*)
2254 // Process the relocs to find list of referenced sections. Used only
2255 // during garbage collection.
2257 template<int size
, bool big_endian
>
2259 Sized_relobj_incr
<size
, big_endian
>::do_gc_process_relocs(Symbol_table
*,
2266 // Scan the relocs and adjust the symbol table.
2268 template<int size
, bool big_endian
>
2270 Sized_relobj_incr
<size
, big_endian
>::do_scan_relocs(Symbol_table
*,
2274 // Count the incremental relocations for this object.
2275 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2276 this->allocate_incremental_reloc_counts();
2277 for (unsigned int i
= 0; i
< nsyms
; i
++)
2279 Incremental_global_symbol_reader
<big_endian
> sym
=
2280 this->input_reader_
.get_global_symbol_reader(i
);
2281 unsigned int reloc_count
= sym
.reloc_count();
2282 if (reloc_count
> 0 && this->incr_reloc_offset_
== -1U)
2283 this->incr_reloc_offset_
= sym
.reloc_offset();
2284 this->incr_reloc_count_
+= reloc_count
;
2285 for (unsigned int j
= 0; j
< reloc_count
; j
++)
2286 this->count_incremental_reloc(i
);
2288 this->incr_reloc_output_index_
=
2289 layout
->incremental_inputs()->get_reloc_count();
2290 this->finalize_incremental_relocs(layout
, false);
2292 // The incoming incremental relocations may not end up in the same
2293 // location after the incremental update, because the incremental info
2294 // is regenerated in each link. Because the new location may overlap
2295 // with other data in the updated output file, we need to copy the
2296 // relocations into a buffer so that we can still read them safely
2297 // after we start writing updates to the output file.
2298 if (this->incr_reloc_count_
> 0)
2300 const Incremental_relocs_reader
<size
, big_endian
>& relocs_reader
=
2301 this->ibase_
->relocs_reader();
2302 const unsigned int incr_reloc_size
= relocs_reader
.reloc_size
;
2303 unsigned int len
= this->incr_reloc_count_
* incr_reloc_size
;
2304 this->incr_relocs_
= new unsigned char[len
];
2305 memcpy(this->incr_relocs_
,
2306 relocs_reader
.data(this->incr_reloc_offset_
),
2311 // Count the local symbols.
2313 template<int size
, bool big_endian
>
2315 Sized_relobj_incr
<size
, big_endian
>::do_count_local_symbols(
2316 Stringpool_template
<char>* pool
,
2317 Stringpool_template
<char>*)
2319 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2321 // Set the count of local symbols based on the incremental info.
2322 unsigned int nlocals
= this->input_reader_
.get_local_symbol_count();
2323 this->local_symbol_count_
= nlocals
;
2324 this->local_symbols_
.reserve(nlocals
);
2326 // Get views of the base file's symbol table and string table.
2327 Incremental_binary::View
symtab_view(NULL
);
2328 unsigned int symtab_count
;
2329 elfcpp::Elf_strtab
strtab(NULL
, 0);
2330 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2332 // Read the local symbols from the base file's symbol table.
2333 off_t off
= this->input_reader_
.get_local_symbol_offset();
2334 const unsigned char* symp
= symtab_view
.data() + off
;
2335 for (unsigned int i
= 0; i
< nlocals
; ++i
, symp
+= sym_size
)
2337 elfcpp::Sym
<size
, big_endian
> sym(symp
);
2339 if (!strtab
.get_c_string(sym
.get_st_name(), &name
))
2341 gold_debug(DEBUG_INCREMENTAL
, "Local symbol %d: %s", i
, name
);
2342 name
= pool
->add(name
, true, NULL
);
2343 this->local_symbols_
.push_back(Local_symbol(name
,
2352 // Finalize the local symbols.
2354 template<int size
, bool big_endian
>
2356 Sized_relobj_incr
<size
, big_endian
>::do_finalize_local_symbols(
2361 this->local_symbol_index_
= index
;
2362 this->local_symbol_offset_
= off
;
2363 return index
+ this->local_symbol_count_
;
2366 // Set the offset where local dynamic symbol information will be stored.
2368 template<int size
, bool big_endian
>
2370 Sized_relobj_incr
<size
, big_endian
>::do_set_local_dynsym_indexes(
2373 // FIXME: set local dynsym indexes.
2377 // Set the offset where local dynamic symbol information will be stored.
2379 template<int size
, bool big_endian
>
2381 Sized_relobj_incr
<size
, big_endian
>::do_set_local_dynsym_offset(off_t
)
2386 // Relocate the input sections and write out the local symbols.
2387 // We don't actually do any relocation here. For unchanged input files,
2388 // we reapply relocations only for symbols that have changed; that happens
2389 // in queue_final_tasks. We do need to rewrite the incremental relocations
2392 template<int size
, bool big_endian
>
2394 Sized_relobj_incr
<size
, big_endian
>::do_relocate(const Symbol_table
*,
2395 const Layout
* layout
,
2398 if (this->incr_reloc_count_
== 0)
2401 const unsigned int incr_reloc_size
=
2402 Incremental_relocs_reader
<size
, big_endian
>::reloc_size
;
2404 // Get a view for the .gnu_incremental_relocs section.
2405 Incremental_inputs
* inputs
= layout
->incremental_inputs();
2406 gold_assert(inputs
!= NULL
);
2407 const off_t relocs_off
= inputs
->relocs_section()->offset();
2408 const off_t relocs_size
= inputs
->relocs_section()->data_size();
2409 unsigned char* const view
= of
->get_output_view(relocs_off
, relocs_size
);
2411 // Copy the relocations from the buffer.
2412 off_t off
= this->incr_reloc_output_index_
* incr_reloc_size
;
2413 unsigned int len
= this->incr_reloc_count_
* incr_reloc_size
;
2414 memcpy(view
+ off
, this->incr_relocs_
, len
);
2416 // The output section table may have changed, so we need to map
2417 // the old section index to the new section index for each relocation.
2418 for (unsigned int i
= 0; i
< this->incr_reloc_count_
; ++i
)
2420 unsigned char* pov
= view
+ off
+ i
* incr_reloc_size
;
2421 unsigned int shndx
= elfcpp::Swap
<32, big_endian
>::readval(pov
+ 4);
2422 Output_section
* os
= this->ibase_
->output_section(shndx
);
2423 gold_assert(os
!= NULL
);
2424 shndx
= os
->out_shndx();
2425 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, shndx
);
2428 of
->write_output_view(off
, len
, view
);
2430 // Get views into the output file for the portions of the symbol table
2431 // and the dynamic symbol table that we will be writing.
2432 off_t symtab_off
= layout
->symtab_section()->offset();
2433 off_t output_size
= this->local_symbol_count_
* This::sym_size
;
2434 unsigned char* oview
= NULL
;
2435 if (output_size
> 0)
2436 oview
= of
->get_output_view(symtab_off
+ this->local_symbol_offset_
,
2439 off_t dyn_output_size
= this->output_local_dynsym_count_
* sym_size
;
2440 unsigned char* dyn_oview
= NULL
;
2441 if (dyn_output_size
> 0)
2442 dyn_oview
= of
->get_output_view(this->local_dynsym_offset_
,
2445 // Write the local symbols.
2446 unsigned char* ov
= oview
;
2447 unsigned char* dyn_ov
= dyn_oview
;
2448 const Stringpool
* sympool
= layout
->sympool();
2449 const Stringpool
* dynpool
= layout
->dynpool();
2450 Output_symtab_xindex
* symtab_xindex
= layout
->symtab_xindex();
2451 Output_symtab_xindex
* dynsym_xindex
= layout
->dynsym_xindex();
2452 for (unsigned int i
= 0; i
< this->local_symbol_count_
; ++i
)
2454 Local_symbol
& lsym(this->local_symbols_
[i
]);
2457 unsigned int st_shndx
= this->adjust_sym_shndx(i
, lsym
.st_shndx
,
2461 Output_section
* os
= this->ibase_
->output_section(st_shndx
);
2462 st_shndx
= os
->out_shndx();
2463 if (st_shndx
>= elfcpp::SHN_LORESERVE
)
2465 symtab_xindex
->add(this->local_symbol_index_
+ i
, st_shndx
);
2466 if (lsym
.needs_dynsym_entry
)
2467 dynsym_xindex
->add(lsym
.output_dynsym_index
, st_shndx
);
2468 st_shndx
= elfcpp::SHN_XINDEX
;
2472 // Write the symbol to the output symbol table.
2474 elfcpp::Sym_write
<size
, big_endian
> osym(ov
);
2475 osym
.put_st_name(sympool
->get_offset(lsym
.name
));
2476 osym
.put_st_value(lsym
.st_value
);
2477 osym
.put_st_size(lsym
.st_size
);
2478 osym
.put_st_info(elfcpp::STB_LOCAL
,
2479 static_cast<elfcpp::STT
>(lsym
.st_type
));
2480 osym
.put_st_other(0);
2481 osym
.put_st_shndx(st_shndx
);
2485 // Write the symbol to the output dynamic symbol table.
2486 if (lsym
.needs_dynsym_entry
)
2488 gold_assert(dyn_ov
< dyn_oview
+ dyn_output_size
);
2489 elfcpp::Sym_write
<size
, big_endian
> osym(dyn_ov
);
2490 osym
.put_st_name(dynpool
->get_offset(lsym
.name
));
2491 osym
.put_st_value(lsym
.st_value
);
2492 osym
.put_st_size(lsym
.st_size
);
2493 osym
.put_st_info(elfcpp::STB_LOCAL
,
2494 static_cast<elfcpp::STT
>(lsym
.st_type
));
2495 osym
.put_st_other(0);
2496 osym
.put_st_shndx(st_shndx
);
2501 if (output_size
> 0)
2503 gold_assert(ov
- oview
== output_size
);
2504 of
->write_output_view(symtab_off
+ this->local_symbol_offset_
,
2505 output_size
, oview
);
2508 if (dyn_output_size
> 0)
2510 gold_assert(dyn_ov
- dyn_oview
== dyn_output_size
);
2511 of
->write_output_view(this->local_dynsym_offset_
, dyn_output_size
,
2516 // Set the offset of a section.
2518 template<int size
, bool big_endian
>
2520 Sized_relobj_incr
<size
, big_endian
>::do_set_section_offset(unsigned int,
2525 // Class Sized_incr_dynobj. Most of these methods are not used for
2526 // Incremental objects, but are required to be implemented by the
2527 // base class Object.
2529 template<int size
, bool big_endian
>
2530 Sized_incr_dynobj
<size
, big_endian
>::Sized_incr_dynobj(
2531 const std::string
& name
,
2532 Sized_incremental_binary
<size
, big_endian
>* ibase
,
2533 unsigned int input_file_index
)
2534 : Dynobj(name
, NULL
), ibase_(ibase
),
2535 input_file_index_(input_file_index
),
2536 input_reader_(ibase
->inputs_reader().input_file(input_file_index
)),
2539 if (this->input_reader_
.is_in_system_directory())
2540 this->set_is_in_system_directory();
2541 if (this->input_reader_
.as_needed())
2542 this->set_as_needed();
2543 this->set_soname_string(this->input_reader_
.get_soname());
2547 // Read the symbols.
2549 template<int size
, bool big_endian
>
2551 Sized_incr_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
*)
2556 // Lay out the input sections.
2558 template<int size
, bool big_endian
>
2560 Sized_incr_dynobj
<size
, big_endian
>::do_layout(
2567 // Add the symbols to the symbol table.
2569 template<int size
, bool big_endian
>
2571 Sized_incr_dynobj
<size
, big_endian
>::do_add_symbols(
2572 Symbol_table
* symtab
,
2576 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2577 unsigned char symbuf
[sym_size
];
2578 elfcpp::Sym
<size
, big_endian
> sym(symbuf
);
2579 elfcpp::Sym_write
<size
, big_endian
> osym(symbuf
);
2581 typedef typename
elfcpp::Elf_types
<size
>::Elf_WXword Elf_size_type
;
2583 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2584 this->symbols_
.resize(nsyms
);
2586 Incremental_binary::View
symtab_view(NULL
);
2587 unsigned int symtab_count
;
2588 elfcpp::Elf_strtab
strtab(NULL
, 0);
2589 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2591 Incremental_symtab_reader
<big_endian
> isymtab(this->ibase_
->symtab_reader());
2592 unsigned int isym_count
= isymtab
.symbol_count();
2593 unsigned int first_global
= symtab_count
- isym_count
;
2595 // We keep a set of symbols that we have generated COPY relocations
2596 // for, indexed by the symbol value. We do not need more than one
2597 // COPY relocation per address.
2598 typedef typename
std::set
<Address
> Copied_symbols
;
2599 Copied_symbols copied_symbols
;
2601 const unsigned char* sym_p
;
2602 for (unsigned int i
= 0; i
< nsyms
; ++i
)
2606 unsigned int output_symndx
=
2607 this->input_reader_
.get_output_symbol_index(i
, &is_def
, &is_copy
);
2608 sym_p
= symtab_view
.data() + output_symndx
* sym_size
;
2609 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
2611 if (!strtab
.get_c_string(gsym
.get_st_name(), &name
))
2616 elfcpp::STB st_bind
= gsym
.get_st_bind();
2617 elfcpp::STT st_type
= gsym
.get_st_type();
2619 // Local hidden symbols start out as globals, but get converted to
2620 // to local during output.
2621 if (st_bind
== elfcpp::STB_LOCAL
)
2622 st_bind
= elfcpp::STB_GLOBAL
;
2626 shndx
= elfcpp::SHN_UNDEF
;
2631 // For a symbol defined in a shared object, the section index
2632 // is meaningless, as long as it's not SHN_UNDEF.
2634 v
= gsym
.get_st_value();
2637 osym
.put_st_name(0);
2638 osym
.put_st_value(v
);
2639 osym
.put_st_size(gsym
.get_st_size());
2640 osym
.put_st_info(st_bind
, st_type
);
2641 osym
.put_st_other(gsym
.get_st_other());
2642 osym
.put_st_shndx(shndx
);
2644 Sized_symbol
<size
>* res
=
2645 symtab
->add_from_incrobj
<size
, big_endian
>(this, name
, NULL
, &sym
);
2646 this->symbols_
[i
] = res
;
2647 this->ibase_
->add_global_symbol(output_symndx
- first_global
,
2652 std::pair
<typename
Copied_symbols::iterator
, bool> ins
=
2653 copied_symbols
.insert(v
);
2656 unsigned int shndx
= gsym
.get_st_shndx();
2657 Output_section
* os
= this->ibase_
->output_section(shndx
);
2658 off_t offset
= v
- os
->address();
2659 this->ibase_
->add_copy_reloc(this->symbols_
[i
], os
, offset
);
2665 // Return TRUE if we should include this object from an archive library.
2667 template<int size
, bool big_endian
>
2668 Archive::Should_include
2669 Sized_incr_dynobj
<size
, big_endian
>::do_should_include_member(
2678 // Iterate over global symbols, calling a visitor class V for each.
2680 template<int size
, bool big_endian
>
2682 Sized_incr_dynobj
<size
, big_endian
>::do_for_all_global_symbols(
2684 Library_base::Symbol_visitor_base
*)
2686 // This routine is not used for dynamic libraries.
2689 // Iterate over local symbols, calling a visitor class V for each GOT offset
2690 // associated with a local symbol.
2692 template<int size
, bool big_endian
>
2694 Sized_incr_dynobj
<size
, big_endian
>::do_for_all_local_got_entries(
2695 Got_offset_list::Visitor
*) const
2699 // Get the size of a section.
2701 template<int size
, bool big_endian
>
2703 Sized_incr_dynobj
<size
, big_endian
>::do_section_size(unsigned int)
2708 // Get the name of a section.
2710 template<int size
, bool big_endian
>
2712 Sized_incr_dynobj
<size
, big_endian
>::do_section_name(unsigned int)
2717 // Return a view of the contents of a section.
2719 template<int size
, bool big_endian
>
2721 Sized_incr_dynobj
<size
, big_endian
>::do_section_contents(unsigned int)
2726 // Return section flags.
2728 template<int size
, bool big_endian
>
2730 Sized_incr_dynobj
<size
, big_endian
>::do_section_flags(unsigned int)
2735 // Return section entsize.
2737 template<int size
, bool big_endian
>
2739 Sized_incr_dynobj
<size
, big_endian
>::do_section_entsize(unsigned int)
2744 // Return section address.
2746 template<int size
, bool big_endian
>
2748 Sized_incr_dynobj
<size
, big_endian
>::do_section_address(unsigned int)
2753 // Return section type.
2755 template<int size
, bool big_endian
>
2757 Sized_incr_dynobj
<size
, big_endian
>::do_section_type(unsigned int)
2762 // Return the section link field.
2764 template<int size
, bool big_endian
>
2766 Sized_incr_dynobj
<size
, big_endian
>::do_section_link(unsigned int)
2771 // Return the section link field.
2773 template<int size
, bool big_endian
>
2775 Sized_incr_dynobj
<size
, big_endian
>::do_section_info(unsigned int)
2780 // Return the section alignment.
2782 template<int size
, bool big_endian
>
2784 Sized_incr_dynobj
<size
, big_endian
>::do_section_addralign(unsigned int)
2789 // Return the Xindex structure to use.
2791 template<int size
, bool big_endian
>
2793 Sized_incr_dynobj
<size
, big_endian
>::do_initialize_xindex()
2798 // Get symbol counts.
2800 template<int size
, bool big_endian
>
2802 Sized_incr_dynobj
<size
, big_endian
>::do_get_global_symbol_counts(
2803 const Symbol_table
*, size_t*, size_t*) const
2808 // Allocate an incremental object of the appropriate size and endianness.
2811 make_sized_incremental_object(
2812 Incremental_binary
* ibase
,
2813 unsigned int input_file_index
,
2814 Incremental_input_type input_type
,
2815 const Incremental_binary::Input_reader
* input_reader
)
2818 std::string
name(input_reader
->filename());
2820 switch (parameters
->size_and_endianness())
2822 #ifdef HAVE_TARGET_32_LITTLE
2823 case Parameters::TARGET_32_LITTLE
:
2825 Sized_incremental_binary
<32, false>* sized_ibase
=
2826 static_cast<Sized_incremental_binary
<32, false>*>(ibase
);
2827 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2828 obj
= new Sized_incr_dynobj
<32, false>(name
, sized_ibase
,
2831 obj
= new Sized_relobj_incr
<32, false>(name
, sized_ibase
,
2836 #ifdef HAVE_TARGET_32_BIG
2837 case Parameters::TARGET_32_BIG
:
2839 Sized_incremental_binary
<32, true>* sized_ibase
=
2840 static_cast<Sized_incremental_binary
<32, true>*>(ibase
);
2841 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2842 obj
= new Sized_incr_dynobj
<32, true>(name
, sized_ibase
,
2845 obj
= new Sized_relobj_incr
<32, true>(name
, sized_ibase
,
2850 #ifdef HAVE_TARGET_64_LITTLE
2851 case Parameters::TARGET_64_LITTLE
:
2853 Sized_incremental_binary
<64, false>* sized_ibase
=
2854 static_cast<Sized_incremental_binary
<64, false>*>(ibase
);
2855 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2856 obj
= new Sized_incr_dynobj
<64, false>(name
, sized_ibase
,
2859 obj
= new Sized_relobj_incr
<64, false>(name
, sized_ibase
,
2864 #ifdef HAVE_TARGET_64_BIG
2865 case Parameters::TARGET_64_BIG
:
2867 Sized_incremental_binary
<64, true>* sized_ibase
=
2868 static_cast<Sized_incremental_binary
<64, true>*>(ibase
);
2869 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2870 obj
= new Sized_incr_dynobj
<64, true>(name
, sized_ibase
,
2873 obj
= new Sized_relobj_incr
<64, true>(name
, sized_ibase
,
2882 gold_assert(obj
!= NULL
);
2886 // Copy the unused symbols from the incremental input info.
2887 // We need to do this because we may be overwriting the incremental
2888 // input info in the base file before we write the new incremental
2891 Incremental_library::copy_unused_symbols()
2893 unsigned int symcount
= this->input_reader_
->get_unused_symbol_count();
2894 this->unused_symbols_
.reserve(symcount
);
2895 for (unsigned int i
= 0; i
< symcount
; ++i
)
2897 std::string
name(this->input_reader_
->get_unused_symbol(i
));
2898 this->unused_symbols_
.push_back(name
);
2902 // Iterator for unused global symbols in the library.
2904 Incremental_library::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
2906 for (Symbol_list::const_iterator p
= this->unused_symbols_
.begin();
2907 p
!= this->unused_symbols_
.end();
2909 v
->visit(p
->c_str());
2912 // Instantiate the templates we need.
2914 #ifdef HAVE_TARGET_32_LITTLE
2916 class Sized_incremental_binary
<32, false>;
2919 class Sized_relobj_incr
<32, false>;
2922 class Sized_incr_dynobj
<32, false>;
2925 #ifdef HAVE_TARGET_32_BIG
2927 class Sized_incremental_binary
<32, true>;
2930 class Sized_relobj_incr
<32, true>;
2933 class Sized_incr_dynobj
<32, true>;
2936 #ifdef HAVE_TARGET_64_LITTLE
2938 class Sized_incremental_binary
<64, false>;
2941 class Sized_relobj_incr
<64, false>;
2944 class Sized_incr_dynobj
<64, false>;
2947 #ifdef HAVE_TARGET_64_BIG
2949 class Sized_incremental_binary
<64, true>;
2952 class Sized_relobj_incr
<64, true>;
2955 class Sized_incr_dynobj
<64, true>;
2958 } // End namespace gold.