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(), i
);
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 gold_debug(DEBUG_INCREMENTAL
,
397 "old command line: %s",
398 inputs
.command_line());
399 gold_debug(DEBUG_INCREMENTAL
,
400 "new command line: %s",
401 incremental_inputs
->command_line().c_str());
402 explain_no_incremental(_("command line changed"));
406 // Walk the list of input files given on the command line, and build
407 // a direct map of argument serial numbers to the corresponding input
409 this->input_args_map_
.resize(cmdline
.number_of_input_files());
410 check_input_args(this->input_args_map_
, cmdline
.begin(), cmdline
.end());
412 // Walk the list of input files to check for conditions that prevent
413 // an incremental update link.
414 unsigned int count
= inputs
.input_file_count();
415 for (unsigned int i
= 0; i
< count
; i
++)
417 Input_entry_reader input_file
= inputs
.input_file(i
);
418 switch (input_file
.type())
420 case INCREMENTAL_INPUT_OBJECT
:
421 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
422 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
423 case INCREMENTAL_INPUT_ARCHIVE
:
424 // No special treatment necessary.
426 case INCREMENTAL_INPUT_SCRIPT
:
427 if (this->do_file_has_changed(i
))
429 explain_no_incremental(_("%s: script file changed"),
430 input_file
.filename());
442 // Return TRUE if input file N has changed since the last incremental link.
444 template<int size
, bool big_endian
>
446 Sized_incremental_binary
<size
, big_endian
>::do_file_has_changed(
447 unsigned int n
) const
449 Input_entry_reader input_file
= this->inputs_reader_
.input_file(n
);
450 Incremental_disposition disp
= INCREMENTAL_CHECK
;
452 // For files named in scripts, find the file that was actually named
453 // on the command line, so that we can get the incremental disposition
455 Script_info
* script
= this->get_script_info(n
);
457 n
= script
->input_file_index();
459 const Input_argument
* input_argument
= this->get_input_argument(n
);
460 if (input_argument
!= NULL
)
461 disp
= input_argument
->file().options().incremental_disposition();
463 if (disp
!= INCREMENTAL_CHECK
)
464 return disp
== INCREMENTAL_CHANGED
;
466 const char* filename
= input_file
.filename();
467 Timespec old_mtime
= input_file
.get_mtime();
469 if (!get_mtime(filename
, &new_mtime
))
471 // If we can't open get the current modification time, assume it has
472 // changed. If the file doesn't exist, we'll issue an error when we
473 // try to open it later.
477 if (new_mtime
.seconds
> old_mtime
.seconds
)
479 if (new_mtime
.seconds
== old_mtime
.seconds
480 && new_mtime
.nanoseconds
> old_mtime
.nanoseconds
)
485 // Initialize the layout of the output file based on the existing
488 template<int size
, bool big_endian
>
490 Sized_incremental_binary
<size
, big_endian
>::do_init_layout(Layout
* layout
)
492 typedef elfcpp::Shdr
<size
, big_endian
> Shdr
;
493 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
495 // Get views of the section headers and the section string table.
496 const off_t shoff
= this->elf_file_
.shoff();
497 const unsigned int shnum
= this->elf_file_
.shnum();
498 const unsigned int shstrndx
= this->elf_file_
.shstrndx();
499 Location
shdrs_location(shoff
, shnum
* shdr_size
);
500 Location
shstrndx_location(this->elf_file_
.section_contents(shstrndx
));
501 View shdrs_view
= this->view(shdrs_location
);
502 View shstrndx_view
= this->view(shstrndx_location
);
503 elfcpp::Elf_strtab
shstrtab(shstrndx_view
.data(),
504 shstrndx_location
.data_size
);
506 layout
->set_incremental_base(this);
508 // Initialize the layout.
509 this->section_map_
.resize(shnum
);
510 const unsigned char* pshdr
= shdrs_view
.data() + shdr_size
;
511 for (unsigned int i
= 1; i
< shnum
; i
++)
515 if (!shstrtab
.get_c_string(shdr
.get_sh_name(), &name
))
517 gold_debug(DEBUG_INCREMENTAL
,
518 "Output section: %2d %08lx %08lx %08lx %3d %s",
520 static_cast<long>(shdr
.get_sh_addr()),
521 static_cast<long>(shdr
.get_sh_offset()),
522 static_cast<long>(shdr
.get_sh_size()),
523 shdr
.get_sh_type(), name
? name
: "<null>");
524 this->section_map_
[i
] = layout
->init_fixed_output_section(name
, shdr
);
529 // Mark regions of the input file that must be kept unchanged.
531 template<int size
, bool big_endian
>
533 Sized_incremental_binary
<size
, big_endian
>::do_reserve_layout(
534 unsigned int input_file_index
)
536 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
538 Input_entry_reader input_file
=
539 this->inputs_reader_
.input_file(input_file_index
);
541 if (input_file
.type() == INCREMENTAL_INPUT_SHARED_LIBRARY
)
543 // Reserve the BSS space used for COPY relocations.
544 unsigned int nsyms
= input_file
.get_global_symbol_count();
545 Incremental_binary::View
symtab_view(NULL
);
546 unsigned int symtab_count
;
547 elfcpp::Elf_strtab
strtab(NULL
, 0);
548 this->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
549 for (unsigned int i
= 0; i
< nsyms
; ++i
)
553 unsigned int output_symndx
=
554 input_file
.get_output_symbol_index(i
, &is_def
, &is_copy
);
557 const unsigned char* sym_p
= (symtab_view
.data()
558 + output_symndx
* sym_size
);
559 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
560 unsigned int shndx
= gsym
.get_st_shndx();
561 if (shndx
< 1 || shndx
>= this->section_map_
.size())
563 Output_section
* os
= this->section_map_
[shndx
];
564 off_t offset
= gsym
.get_st_value() - os
->address();
565 os
->reserve(offset
, gsym
.get_st_size());
566 gold_debug(DEBUG_INCREMENTAL
,
567 "Reserve for COPY reloc: %s, off %d, size %d",
569 static_cast<int>(offset
),
570 static_cast<int>(gsym
.get_st_size()));
576 unsigned int shnum
= input_file
.get_input_section_count();
577 for (unsigned int i
= 0; i
< shnum
; i
++)
579 typename
Input_entry_reader::Input_section_info sect
=
580 input_file
.get_input_section(i
);
581 if (sect
.output_shndx
== 0 || sect
.sh_offset
== -1)
583 Output_section
* os
= this->section_map_
[sect
.output_shndx
];
584 gold_assert(os
!= NULL
);
585 os
->reserve(sect
.sh_offset
, sect
.sh_size
);
589 // Process the GOT and PLT entries from the existing output file.
591 template<int size
, bool big_endian
>
593 Sized_incremental_binary
<size
, big_endian
>::do_process_got_plt(
594 Symbol_table
* symtab
,
597 Incremental_got_plt_reader
<big_endian
> got_plt_reader(this->got_plt_reader());
598 Sized_target
<size
, big_endian
>* target
=
599 parameters
->sized_target
<size
, big_endian
>();
601 // Get the number of symbols in the main symbol table and in the
602 // incremental symbol table. The difference between the two counts
603 // is the index of the first forced-local or global symbol in the
604 // main symbol table.
605 unsigned int symtab_count
=
606 this->main_symtab_loc_
.data_size
/ elfcpp::Elf_sizes
<size
>::sym_size
;
607 unsigned int isym_count
= this->symtab_reader_
.symbol_count();
608 unsigned int first_global
= symtab_count
- isym_count
;
610 // Tell the target how big the GOT and PLT sections are.
611 unsigned int got_count
= got_plt_reader
.get_got_entry_count();
612 unsigned int plt_count
= got_plt_reader
.get_plt_entry_count();
613 Output_data_got
<size
, big_endian
>* got
=
614 target
->init_got_plt_for_update(symtab
, layout
, got_count
, plt_count
);
616 // Read the GOT entries from the base file and build the outgoing GOT.
617 for (unsigned int i
= 0; i
< got_count
; ++i
)
619 unsigned int got_type
= got_plt_reader
.get_got_type(i
);
620 if ((got_type
& 0x7f) == 0x7f)
622 // This is the second entry of a pair.
623 got
->reserve_slot(i
);
626 unsigned int symndx
= got_plt_reader
.get_got_symndx(i
);
629 // This is an entry for a local symbol. Ignore this entry if
630 // the object file was replaced.
631 unsigned int input_index
= got_plt_reader
.get_got_input_index(i
);
632 gold_debug(DEBUG_INCREMENTAL
,
633 "GOT entry %d, type %02x: (local symbol)",
635 Sized_relobj_incr
<size
, big_endian
>* obj
=
636 this->input_object(input_index
);
638 target
->reserve_local_got_entry(i
, obj
, symndx
, got_type
& 0x7f);
642 // This is an entry for a global symbol. GOT_DESC is the symbol
644 // FIXME: This should really be a fatal error (corrupt input).
645 gold_assert(symndx
>= first_global
&& symndx
< symtab_count
);
646 Symbol
* sym
= this->global_symbol(symndx
- first_global
);
647 // Add the GOT entry only if the symbol is still referenced.
648 if (sym
!= NULL
&& sym
->in_reg())
650 gold_debug(DEBUG_INCREMENTAL
,
651 "GOT entry %d, type %02x: %s",
652 i
, got_type
, sym
->name());
653 target
->reserve_global_got_entry(i
, sym
, got_type
);
658 // Read the PLT entries from the base file and pass each to the target.
659 for (unsigned int i
= 0; i
< plt_count
; ++i
)
661 unsigned int plt_desc
= got_plt_reader
.get_plt_desc(i
);
662 // FIXME: This should really be a fatal error (corrupt input).
663 gold_assert(plt_desc
>= first_global
&& plt_desc
< symtab_count
);
664 Symbol
* sym
= this->global_symbol(plt_desc
- first_global
);
665 // Add the PLT entry only if the symbol is still referenced.
668 gold_debug(DEBUG_INCREMENTAL
,
671 target
->register_global_plt_entry(i
, sym
);
676 // Emit COPY relocations from the existing output file.
678 template<int size
, bool big_endian
>
680 Sized_incremental_binary
<size
, big_endian
>::do_emit_copy_relocs(
681 Symbol_table
* symtab
)
683 Sized_target
<size
, big_endian
>* target
=
684 parameters
->sized_target
<size
, big_endian
>();
686 for (typename
Copy_relocs::iterator p
= this->copy_relocs_
.begin();
687 p
!= this->copy_relocs_
.end();
690 if (!(*p
).symbol
->is_copied_from_dynobj())
691 target
->emit_copy_reloc(symtab
, (*p
).symbol
, (*p
).output_section
,
696 // Apply incremental relocations for symbols whose values have changed.
698 template<int size
, bool big_endian
>
700 Sized_incremental_binary
<size
, big_endian
>::do_apply_incremental_relocs(
701 const Symbol_table
* symtab
,
705 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
706 typedef typename
elfcpp::Elf_types
<size
>::Elf_Swxword Addend
;
707 Incremental_symtab_reader
<big_endian
> isymtab(this->symtab_reader());
708 Incremental_relocs_reader
<size
, big_endian
> irelocs(this->relocs_reader());
709 unsigned int nglobals
= isymtab
.symbol_count();
710 const unsigned int incr_reloc_size
= irelocs
.reloc_size
;
712 Relocate_info
<size
, big_endian
> relinfo
;
713 relinfo
.symtab
= symtab
;
714 relinfo
.layout
= layout
;
715 relinfo
.object
= NULL
;
716 relinfo
.reloc_shndx
= 0;
717 relinfo
.reloc_shdr
= NULL
;
718 relinfo
.data_shndx
= 0;
719 relinfo
.data_shdr
= NULL
;
721 Sized_target
<size
, big_endian
>* target
=
722 parameters
->sized_target
<size
, big_endian
>();
724 for (unsigned int i
= 0; i
< nglobals
; i
++)
726 const Symbol
* gsym
= this->global_symbol(i
);
728 // If the symbol is not referenced from any unchanged input files,
729 // we do not need to reapply any of its relocations.
733 // If the symbol is defined in an unchanged file, we do not need to
734 // reapply any of its relocations.
735 if (gsym
->source() == Symbol::FROM_OBJECT
736 && gsym
->object()->is_incremental())
739 gold_debug(DEBUG_INCREMENTAL
,
740 "Applying incremental relocations for global symbol %s [%d]",
743 // Follow the linked list of input symbol table entries for this symbol.
744 // We don't bother to figure out whether the symbol table entry belongs
745 // to a changed or unchanged file because it's easier just to apply all
746 // the relocations -- although we might scribble over an area that has
747 // been reallocated, we do this before copying any new data into the
749 unsigned int offset
= isymtab
.get_list_head(i
);
752 Incremental_global_symbol_reader
<big_endian
> sym_info
=
753 this->inputs_reader().global_symbol_reader_at_offset(offset
);
754 unsigned int r_base
= sym_info
.reloc_offset();
755 unsigned int r_count
= sym_info
.reloc_count();
757 // Apply each relocation for this symbol table entry.
758 for (unsigned int j
= 0; j
< r_count
;
759 ++j
, r_base
+= incr_reloc_size
)
761 unsigned int r_type
= irelocs
.get_r_type(r_base
);
762 unsigned int r_shndx
= irelocs
.get_r_shndx(r_base
);
763 Address r_offset
= irelocs
.get_r_offset(r_base
);
764 Addend r_addend
= irelocs
.get_r_addend(r_base
);
765 Output_section
* os
= this->output_section(r_shndx
);
766 Address address
= os
->address();
767 off_t section_offset
= os
->offset();
768 size_t view_size
= os
->data_size();
769 unsigned char* const view
= of
->get_output_view(section_offset
,
772 gold_debug(DEBUG_INCREMENTAL
,
773 " %08lx: %s + %d: type %d addend %ld",
774 (long)(section_offset
+ r_offset
),
780 target
->apply_relocation(&relinfo
, r_offset
, r_type
, r_addend
,
781 gsym
, view
, address
, view_size
);
783 // FIXME: Do something more efficient if write_output_view
784 // ever becomes more than a no-op.
785 of
->write_output_view(section_offset
, view_size
, view
);
787 offset
= sym_info
.next_offset();
792 // Get a view of the main symbol table and the symbol string table.
794 template<int size
, bool big_endian
>
796 Sized_incremental_binary
<size
, big_endian
>::get_symtab_view(
799 elfcpp::Elf_strtab
* strtab
)
801 *symtab_view
= this->view(this->main_symtab_loc_
);
802 *nsyms
= this->main_symtab_loc_
.data_size
/ elfcpp::Elf_sizes
<size
>::sym_size
;
804 View
strtab_view(this->view(this->main_strtab_loc_
));
805 *strtab
= elfcpp::Elf_strtab(strtab_view
.data(),
806 this->main_strtab_loc_
.data_size
);
812 // Create a Sized_incremental_binary object of the specified size and
813 // endianness. Fails if the target architecture is not supported.
815 template<int size
, bool big_endian
>
817 make_sized_incremental_binary(Output_file
* file
,
818 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
820 Target
* target
= select_target(ehdr
.get_e_machine(), size
, big_endian
,
821 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
822 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
825 explain_no_incremental(_("unsupported ELF machine number %d"),
826 ehdr
.get_e_machine());
830 if (!parameters
->target_valid())
831 set_parameters_target(target
);
832 else if (target
!= ¶meters
->target())
833 gold_error(_("%s: incompatible target"), file
->filename());
835 return new Sized_incremental_binary
<size
, big_endian
>(file
, ehdr
, target
);
838 } // End of anonymous namespace.
840 // Create an Incremental_binary object for FILE. Returns NULL is this is not
841 // possible, e.g. FILE is not an ELF file or has an unsupported target. FILE
845 open_incremental_binary(Output_file
* file
)
847 off_t filesize
= file
->filesize();
848 int want
= elfcpp::Elf_recognizer::max_header_size
;
852 const unsigned char* p
= file
->get_input_view(0, want
);
853 if (!elfcpp::Elf_recognizer::is_elf_file(p
, want
))
855 explain_no_incremental(_("output is not an ELF file."));
860 bool big_endian
= false;
862 if (!elfcpp::Elf_recognizer::is_valid_header(p
, want
, &size
, &big_endian
,
865 explain_no_incremental(error
.c_str());
869 Incremental_binary
* result
= NULL
;
874 #ifdef HAVE_TARGET_32_BIG
875 result
= make_sized_incremental_binary
<32, true>(
876 file
, elfcpp::Ehdr
<32, true>(p
));
878 explain_no_incremental(_("unsupported file: 32-bit, big-endian"));
883 #ifdef HAVE_TARGET_32_LITTLE
884 result
= make_sized_incremental_binary
<32, false>(
885 file
, elfcpp::Ehdr
<32, false>(p
));
887 explain_no_incremental(_("unsupported file: 32-bit, little-endian"));
895 #ifdef HAVE_TARGET_64_BIG
896 result
= make_sized_incremental_binary
<64, true>(
897 file
, elfcpp::Ehdr
<64, true>(p
));
899 explain_no_incremental(_("unsupported file: 64-bit, big-endian"));
904 #ifdef HAVE_TARGET_64_LITTLE
905 result
= make_sized_incremental_binary
<64, false>(
906 file
, elfcpp::Ehdr
<64, false>(p
));
908 explain_no_incremental(_("unsupported file: 64-bit, little-endian"));
918 // Class Incremental_inputs.
920 // Add the command line to the string table, setting
921 // command_line_key_. In incremental builds, the command line is
922 // stored in .gnu_incremental_inputs so that the next linker run can
923 // check if the command line options didn't change.
926 Incremental_inputs::report_command_line(int argc
, const char* const* argv
)
928 // Always store 'gold' as argv[0] to avoid a full relink if the user used a
929 // different path to the linker.
930 std::string
args("gold");
931 // Copied from collect_argv in main.cc.
932 for (int i
= 1; i
< argc
; ++i
)
934 // Adding/removing these options should not result in a full relink.
935 if (strcmp(argv
[i
], "--incremental") == 0
936 || strcmp(argv
[i
], "--incremental-full") == 0
937 || strcmp(argv
[i
], "--incremental-update") == 0
938 || strcmp(argv
[i
], "--incremental-changed") == 0
939 || strcmp(argv
[i
], "--incremental-unchanged") == 0
940 || strcmp(argv
[i
], "--incremental-unknown") == 0
941 || is_prefix_of("--incremental-base=", argv
[i
])
942 || is_prefix_of("--incremental-patch=", argv
[i
])
943 || is_prefix_of("--debug=", argv
[i
]))
945 if (strcmp(argv
[i
], "--incremental-base") == 0
946 || strcmp(argv
[i
], "--incremental-patch") == 0
947 || strcmp(argv
[i
], "--debug") == 0)
949 // When these options are used without the '=', skip the
950 // following parameter as well.
956 // Now append argv[i], but with all single-quotes escaped
957 const char* argpos
= argv
[i
];
960 const int len
= strcspn(argpos
, "'");
961 args
.append(argpos
, len
);
962 if (argpos
[len
] == '\0')
964 args
.append("'\"'\"'");
970 this->command_line_
= args
;
971 this->strtab_
->add(this->command_line_
.c_str(), false,
972 &this->command_line_key_
);
975 // Record the input archive file ARCHIVE. This is called by the
976 // Add_archive_symbols task before determining which archive members
977 // to include. We create the Incremental_archive_entry here and
978 // attach it to the Archive, but we do not add it to the list of
979 // input objects until report_archive_end is called.
982 Incremental_inputs::report_archive_begin(Library_base
* arch
,
983 unsigned int arg_serial
,
984 Script_info
* script_info
)
986 Stringpool::Key filename_key
;
987 Timespec mtime
= arch
->get_mtime();
989 // For a file loaded from a script, don't record its argument serial number.
990 if (script_info
!= NULL
)
993 this->strtab_
->add(arch
->filename().c_str(), false, &filename_key
);
994 Incremental_archive_entry
* entry
=
995 new Incremental_archive_entry(filename_key
, arg_serial
, mtime
);
996 arch
->set_incremental_info(entry
);
998 if (script_info
!= NULL
)
1000 Incremental_script_entry
* script_entry
= script_info
->incremental_info();
1001 gold_assert(script_entry
!= NULL
);
1002 script_entry
->add_object(entry
);
1006 // Visitor class for processing the unused global symbols in a library.
1007 // An instance of this class is passed to the library's
1008 // for_all_unused_symbols() iterator, which will call the visit()
1009 // function for each global symbol defined in each unused library
1010 // member. We add those symbol names to the incremental info for the
1013 class Unused_symbol_visitor
: public Library_base::Symbol_visitor_base
1016 Unused_symbol_visitor(Incremental_archive_entry
* entry
, Stringpool
* strtab
)
1017 : entry_(entry
), strtab_(strtab
)
1021 visit(const char* sym
)
1023 Stringpool::Key symbol_key
;
1024 this->strtab_
->add(sym
, true, &symbol_key
);
1025 this->entry_
->add_unused_global_symbol(symbol_key
);
1029 Incremental_archive_entry
* entry_
;
1030 Stringpool
* strtab_
;
1033 // Finish recording the input archive file ARCHIVE. This is called by the
1034 // Add_archive_symbols task after determining which archive members
1038 Incremental_inputs::report_archive_end(Library_base
* arch
)
1040 Incremental_archive_entry
* entry
= arch
->incremental_info();
1042 gold_assert(entry
!= NULL
);
1043 this->inputs_
.push_back(entry
);
1045 // Collect unused global symbols.
1046 Unused_symbol_visitor
v(entry
, this->strtab_
);
1047 arch
->for_all_unused_symbols(&v
);
1050 // Record the input object file OBJ. If ARCH is not NULL, attach
1051 // the object file to the archive. This is called by the
1052 // Add_symbols task after finding out the type of the file.
1055 Incremental_inputs::report_object(Object
* obj
, unsigned int arg_serial
,
1056 Library_base
* arch
, Script_info
* script_info
)
1058 Stringpool::Key filename_key
;
1059 Timespec mtime
= obj
->get_mtime();
1061 // For a file loaded from a script, don't record its argument serial number.
1062 if (script_info
!= NULL
)
1065 this->strtab_
->add(obj
->name().c_str(), false, &filename_key
);
1067 Incremental_input_entry
* input_entry
;
1069 this->current_object_
= obj
;
1071 if (!obj
->is_dynamic())
1073 this->current_object_entry_
=
1074 new Incremental_object_entry(filename_key
, obj
, arg_serial
, mtime
);
1075 input_entry
= this->current_object_entry_
;
1078 Incremental_archive_entry
* arch_entry
= arch
->incremental_info();
1079 gold_assert(arch_entry
!= NULL
);
1080 arch_entry
->add_object(this->current_object_entry_
);
1085 this->current_object_entry_
= NULL
;
1086 Stringpool::Key soname_key
;
1087 Dynobj
* dynobj
= obj
->dynobj();
1088 gold_assert(dynobj
!= NULL
);
1089 this->strtab_
->add(dynobj
->soname(), false, &soname_key
);
1090 input_entry
= new Incremental_dynobj_entry(filename_key
, soname_key
, obj
,
1094 if (obj
->is_in_system_directory())
1095 input_entry
->set_is_in_system_directory();
1097 if (obj
->as_needed())
1098 input_entry
->set_as_needed();
1100 this->inputs_
.push_back(input_entry
);
1102 if (script_info
!= NULL
)
1104 Incremental_script_entry
* script_entry
= script_info
->incremental_info();
1105 gold_assert(script_entry
!= NULL
);
1106 script_entry
->add_object(input_entry
);
1110 // Record an input section SHNDX from object file OBJ.
1113 Incremental_inputs::report_input_section(Object
* obj
, unsigned int shndx
,
1114 const char* name
, off_t sh_size
)
1116 Stringpool::Key key
= 0;
1119 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_input_section(shndx
, key
, sh_size
);
1126 // Record a kept COMDAT group belonging to object file OBJ.
1129 Incremental_inputs::report_comdat_group(Object
* obj
, const char* name
)
1131 Stringpool::Key key
= 0;
1134 this->strtab_
->add(name
, true, &key
);
1135 gold_assert(obj
== this->current_object_
);
1136 gold_assert(this->current_object_entry_
!= NULL
);
1137 this->current_object_entry_
->add_comdat_group(key
);
1140 // Record that the input argument INPUT is a script SCRIPT. This is
1141 // called by read_script after parsing the script and reading the list
1142 // of inputs added by this script.
1145 Incremental_inputs::report_script(Script_info
* script
,
1146 unsigned int arg_serial
,
1149 Stringpool::Key filename_key
;
1151 this->strtab_
->add(script
->filename().c_str(), false, &filename_key
);
1152 Incremental_script_entry
* entry
=
1153 new Incremental_script_entry(filename_key
, arg_serial
, script
, mtime
);
1154 this->inputs_
.push_back(entry
);
1155 script
->set_incremental_info(entry
);
1158 // Finalize the incremental link information. Called from
1159 // Layout::finalize.
1162 Incremental_inputs::finalize()
1164 // Finalize the string table.
1165 this->strtab_
->set_string_offsets();
1168 // Create the .gnu_incremental_inputs, _symtab, and _relocs input sections.
1171 Incremental_inputs::create_data_sections(Symbol_table
* symtab
)
1173 switch (parameters
->size_and_endianness())
1175 #ifdef HAVE_TARGET_32_LITTLE
1176 case Parameters::TARGET_32_LITTLE
:
1177 this->inputs_section_
=
1178 new Output_section_incremental_inputs
<32, false>(this, symtab
);
1181 #ifdef HAVE_TARGET_32_BIG
1182 case Parameters::TARGET_32_BIG
:
1183 this->inputs_section_
=
1184 new Output_section_incremental_inputs
<32, true>(this, symtab
);
1187 #ifdef HAVE_TARGET_64_LITTLE
1188 case Parameters::TARGET_64_LITTLE
:
1189 this->inputs_section_
=
1190 new Output_section_incremental_inputs
<64, false>(this, symtab
);
1193 #ifdef HAVE_TARGET_64_BIG
1194 case Parameters::TARGET_64_BIG
:
1195 this->inputs_section_
=
1196 new Output_section_incremental_inputs
<64, true>(this, symtab
);
1202 this->symtab_section_
= new Output_data_space(4, "** incremental_symtab");
1203 this->relocs_section_
= new Output_data_space(4, "** incremental_relocs");
1204 this->got_plt_section_
= new Output_data_space(4, "** incremental_got_plt");
1207 // Return the sh_entsize value for the .gnu_incremental_relocs section.
1209 Incremental_inputs::relocs_entsize() const
1211 return 8 + 2 * parameters
->target().get_size() / 8;
1214 // Class Output_section_incremental_inputs.
1216 // Finalize the offsets for each input section and supplemental info block,
1217 // and set the final data size of the incremental output sections.
1219 template<int size
, bool big_endian
>
1221 Output_section_incremental_inputs
<size
, big_endian
>::set_final_data_size()
1223 const Incremental_inputs
* inputs
= this->inputs_
;
1224 const unsigned int sizeof_addr
= size
/ 8;
1225 const unsigned int rel_size
= 8 + 2 * sizeof_addr
;
1227 // Offset of each input entry.
1228 unsigned int input_offset
= this->header_size
;
1230 // Offset of each supplemental info block.
1231 unsigned int file_index
= 0;
1232 unsigned int info_offset
= this->header_size
;
1233 info_offset
+= this->input_entry_size
* inputs
->input_file_count();
1235 // Count each input file and its supplemental information block.
1236 for (Incremental_inputs::Input_list::const_iterator p
=
1237 inputs
->input_files().begin();
1238 p
!= inputs
->input_files().end();
1241 // Set the index and offset of the input file entry.
1242 (*p
)->set_offset(file_index
, input_offset
);
1244 input_offset
+= this->input_entry_size
;
1246 // Set the offset of the supplemental info block.
1247 switch ((*p
)->type())
1249 case INCREMENTAL_INPUT_SCRIPT
:
1251 Incremental_script_entry
*entry
= (*p
)->script_entry();
1252 gold_assert(entry
!= NULL
);
1253 (*p
)->set_info_offset(info_offset
);
1257 info_offset
+= (entry
->get_object_count() * 4);
1260 case INCREMENTAL_INPUT_OBJECT
:
1261 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
1263 Incremental_object_entry
* entry
= (*p
)->object_entry();
1264 gold_assert(entry
!= NULL
);
1265 (*p
)->set_info_offset(info_offset
);
1266 // Input section count, global symbol count, local symbol offset,
1267 // local symbol count, first dynamic reloc, dynamic reloc count,
1268 // comdat group count.
1270 // Each input section.
1271 info_offset
+= (entry
->get_input_section_count()
1272 * (8 + 2 * sizeof_addr
));
1273 // Each global symbol.
1274 const Object::Symbols
* syms
= entry
->object()->get_global_symbols();
1275 info_offset
+= syms
->size() * 20;
1276 // Each comdat group.
1277 info_offset
+= entry
->get_comdat_group_count() * 4;
1280 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
1282 Incremental_dynobj_entry
* entry
= (*p
)->dynobj_entry();
1283 gold_assert(entry
!= NULL
);
1284 (*p
)->set_info_offset(info_offset
);
1285 // Global symbol count, soname index.
1287 // Each global symbol.
1288 const Object::Symbols
* syms
= entry
->object()->get_global_symbols();
1289 gold_assert(syms
!= NULL
);
1290 unsigned int nsyms
= syms
->size();
1291 unsigned int nsyms_out
= 0;
1292 for (unsigned int i
= 0; i
< nsyms
; ++i
)
1294 const Symbol
* sym
= (*syms
)[i
];
1297 if (sym
->is_forwarder())
1298 sym
= this->symtab_
->resolve_forwards(sym
);
1299 if (sym
->symtab_index() != -1U)
1302 info_offset
+= nsyms_out
* 4;
1305 case INCREMENTAL_INPUT_ARCHIVE
:
1307 Incremental_archive_entry
* entry
= (*p
)->archive_entry();
1308 gold_assert(entry
!= NULL
);
1309 (*p
)->set_info_offset(info_offset
);
1310 // Member count + unused global symbol count.
1313 info_offset
+= (entry
->get_member_count() * 4);
1314 // Each global symbol.
1315 info_offset
+= (entry
->get_unused_global_symbol_count() * 4);
1323 this->set_data_size(info_offset
);
1325 // Set the size of the .gnu_incremental_symtab section.
1326 inputs
->symtab_section()->set_current_data_size(this->symtab_
->output_count()
1327 * sizeof(unsigned int));
1329 // Set the size of the .gnu_incremental_relocs section.
1330 inputs
->relocs_section()->set_current_data_size(inputs
->get_reloc_count()
1333 // Set the size of the .gnu_incremental_got_plt section.
1334 Sized_target
<size
, big_endian
>* target
=
1335 parameters
->sized_target
<size
, big_endian
>();
1336 unsigned int got_count
= target
->got_entry_count();
1337 unsigned int plt_count
= target
->plt_entry_count();
1338 unsigned int got_plt_size
= 8; // GOT entry count, PLT entry count.
1339 got_plt_size
= (got_plt_size
+ got_count
+ 3) & ~3; // GOT type array.
1340 got_plt_size
+= got_count
* 8 + plt_count
* 4; // GOT array, PLT array.
1341 inputs
->got_plt_section()->set_current_data_size(got_plt_size
);
1344 // Write the contents of the .gnu_incremental_inputs and
1345 // .gnu_incremental_symtab sections.
1347 template<int size
, bool big_endian
>
1349 Output_section_incremental_inputs
<size
, big_endian
>::do_write(Output_file
* of
)
1351 const Incremental_inputs
* inputs
= this->inputs_
;
1352 Stringpool
* strtab
= inputs
->get_stringpool();
1354 // Get a view into the .gnu_incremental_inputs section.
1355 const off_t off
= this->offset();
1356 const off_t oview_size
= this->data_size();
1357 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1358 unsigned char* pov
= oview
;
1360 // Get a view into the .gnu_incremental_symtab section.
1361 const off_t symtab_off
= inputs
->symtab_section()->offset();
1362 const off_t symtab_size
= inputs
->symtab_section()->data_size();
1363 unsigned char* const symtab_view
= of
->get_output_view(symtab_off
,
1366 // Allocate an array of linked list heads for the .gnu_incremental_symtab
1367 // section. Each element corresponds to a global symbol in the output
1368 // symbol table, and points to the head of the linked list that threads
1369 // through the object file input entries. The value of each element
1370 // is the section-relative offset to a global symbol entry in a
1371 // supplemental information block.
1372 unsigned int global_sym_count
= this->symtab_
->output_count();
1373 unsigned int* global_syms
= new unsigned int[global_sym_count
];
1374 memset(global_syms
, 0, global_sym_count
* sizeof(unsigned int));
1376 // Write the section header.
1377 Stringpool::Key command_line_key
= inputs
->command_line_key();
1378 pov
= this->write_header(pov
, inputs
->input_file_count(),
1379 strtab
->get_offset_from_key(command_line_key
));
1381 // Write the list of input files.
1382 pov
= this->write_input_files(oview
, pov
, strtab
);
1384 // Write the supplemental information blocks for each input file.
1385 pov
= this->write_info_blocks(oview
, pov
, strtab
, global_syms
,
1388 gold_assert(pov
- oview
== oview_size
);
1390 // Write the .gnu_incremental_symtab section.
1391 gold_assert(global_sym_count
* 4 == symtab_size
);
1392 this->write_symtab(symtab_view
, global_syms
, global_sym_count
);
1394 delete[] global_syms
;
1396 // Write the .gnu_incremental_got_plt section.
1397 const off_t got_plt_off
= inputs
->got_plt_section()->offset();
1398 const off_t got_plt_size
= inputs
->got_plt_section()->data_size();
1399 unsigned char* const got_plt_view
= of
->get_output_view(got_plt_off
,
1401 this->write_got_plt(got_plt_view
, got_plt_size
);
1403 of
->write_output_view(off
, oview_size
, oview
);
1404 of
->write_output_view(symtab_off
, symtab_size
, symtab_view
);
1405 of
->write_output_view(got_plt_off
, got_plt_size
, got_plt_view
);
1408 // Write the section header: version, input file count, offset of command line
1409 // in the string table, and 4 bytes of padding.
1411 template<int size
, bool big_endian
>
1413 Output_section_incremental_inputs
<size
, big_endian
>::write_header(
1415 unsigned int input_file_count
,
1416 section_offset_type command_line_offset
)
1418 Swap32::writeval(pov
, INCREMENTAL_LINK_VERSION
);
1419 Swap32::writeval(pov
+ 4, input_file_count
);
1420 Swap32::writeval(pov
+ 8, command_line_offset
);
1421 Swap32::writeval(pov
+ 12, 0);
1422 return pov
+ this->header_size
;
1425 // Write the input file entries.
1427 template<int size
, bool big_endian
>
1429 Output_section_incremental_inputs
<size
, big_endian
>::write_input_files(
1430 unsigned char* oview
,
1434 const Incremental_inputs
* inputs
= this->inputs_
;
1436 for (Incremental_inputs::Input_list::const_iterator p
=
1437 inputs
->input_files().begin();
1438 p
!= inputs
->input_files().end();
1441 gold_assert(static_cast<unsigned int>(pov
- oview
) == (*p
)->get_offset());
1442 section_offset_type filename_offset
=
1443 strtab
->get_offset_from_key((*p
)->get_filename_key());
1444 const Timespec
& mtime
= (*p
)->get_mtime();
1445 unsigned int flags
= (*p
)->type();
1446 if ((*p
)->is_in_system_directory())
1447 flags
|= INCREMENTAL_INPUT_IN_SYSTEM_DIR
;
1448 if ((*p
)->as_needed())
1449 flags
|= INCREMENTAL_INPUT_AS_NEEDED
;
1450 Swap32::writeval(pov
, filename_offset
);
1451 Swap32::writeval(pov
+ 4, (*p
)->get_info_offset());
1452 Swap64::writeval(pov
+ 8, mtime
.seconds
);
1453 Swap32::writeval(pov
+ 16, mtime
.nanoseconds
);
1454 Swap16::writeval(pov
+ 20, flags
);
1455 Swap16::writeval(pov
+ 22, (*p
)->arg_serial());
1456 pov
+= this->input_entry_size
;
1461 // Write the supplemental information blocks.
1463 template<int size
, bool big_endian
>
1465 Output_section_incremental_inputs
<size
, big_endian
>::write_info_blocks(
1466 unsigned char* oview
,
1469 unsigned int* global_syms
,
1470 unsigned int global_sym_count
)
1472 const Incremental_inputs
* inputs
= this->inputs_
;
1473 unsigned int first_global_index
= this->symtab_
->first_global_index();
1475 for (Incremental_inputs::Input_list::const_iterator p
=
1476 inputs
->input_files().begin();
1477 p
!= inputs
->input_files().end();
1480 switch ((*p
)->type())
1482 case INCREMENTAL_INPUT_SCRIPT
:
1484 gold_assert(static_cast<unsigned int>(pov
- oview
)
1485 == (*p
)->get_info_offset());
1486 Incremental_script_entry
* entry
= (*p
)->script_entry();
1487 gold_assert(entry
!= NULL
);
1489 // Write the object count.
1490 unsigned int nobjects
= entry
->get_object_count();
1491 Swap32::writeval(pov
, nobjects
);
1494 // For each object, write the offset to its input file entry.
1495 for (unsigned int i
= 0; i
< nobjects
; ++i
)
1497 Incremental_input_entry
* obj
= entry
->get_object(i
);
1498 Swap32::writeval(pov
, obj
->get_offset());
1504 case INCREMENTAL_INPUT_OBJECT
:
1505 case INCREMENTAL_INPUT_ARCHIVE_MEMBER
:
1507 gold_assert(static_cast<unsigned int>(pov
- oview
)
1508 == (*p
)->get_info_offset());
1509 Incremental_object_entry
* entry
= (*p
)->object_entry();
1510 gold_assert(entry
!= NULL
);
1511 const Object
* obj
= entry
->object();
1512 const Relobj
* relobj
= static_cast<const Relobj
*>(obj
);
1513 const Object::Symbols
* syms
= obj
->get_global_symbols();
1514 // Write the input section count and global symbol count.
1515 unsigned int nsections
= entry
->get_input_section_count();
1516 unsigned int nsyms
= syms
->size();
1517 off_t locals_offset
= relobj
->local_symbol_offset();
1518 unsigned int nlocals
= relobj
->output_local_symbol_count();
1519 unsigned int first_dynrel
= relobj
->first_dyn_reloc();
1520 unsigned int ndynrel
= relobj
->dyn_reloc_count();
1521 unsigned int ncomdat
= entry
->get_comdat_group_count();
1522 Swap32::writeval(pov
, nsections
);
1523 Swap32::writeval(pov
+ 4, nsyms
);
1524 Swap32::writeval(pov
+ 8, static_cast<unsigned int>(locals_offset
));
1525 Swap32::writeval(pov
+ 12, nlocals
);
1526 Swap32::writeval(pov
+ 16, first_dynrel
);
1527 Swap32::writeval(pov
+ 20, ndynrel
);
1528 Swap32::writeval(pov
+ 24, ncomdat
);
1531 // Build a temporary array to map input section indexes
1532 // from the original object file index to the index in the
1533 // incremental info table.
1534 unsigned int* index_map
= new unsigned int[obj
->shnum()];
1535 memset(index_map
, 0, obj
->shnum() * sizeof(unsigned int));
1537 // For each input section, write the name, output section index,
1538 // offset within output section, and input section size.
1539 for (unsigned int i
= 0; i
< nsections
; i
++)
1541 unsigned int shndx
= entry
->get_input_section_index(i
);
1542 index_map
[shndx
] = i
+ 1;
1543 Stringpool::Key key
= entry
->get_input_section_name_key(i
);
1544 off_t name_offset
= 0;
1546 name_offset
= strtab
->get_offset_from_key(key
);
1548 off_t out_offset
= 0;
1550 Output_section
* os
= obj
->output_section(shndx
);
1553 out_shndx
= os
->out_shndx();
1554 out_offset
= obj
->output_section_offset(shndx
);
1555 sh_size
= entry
->get_input_section_size(i
);
1557 Swap32::writeval(pov
, name_offset
);
1558 Swap32::writeval(pov
+ 4, out_shndx
);
1559 Swap::writeval(pov
+ 8, out_offset
);
1560 Swap::writeval(pov
+ 8 + sizeof_addr
, sh_size
);
1561 pov
+= 8 + 2 * sizeof_addr
;
1564 // For each global symbol, write its associated relocations,
1565 // add it to the linked list of globals, then write the
1566 // supplemental information: global symbol table index,
1567 // input section index, linked list chain pointer, relocation
1568 // count, and offset to the relocations.
1569 for (unsigned int i
= 0; i
< nsyms
; i
++)
1571 const Symbol
* sym
= (*syms
)[i
];
1572 if (sym
->is_forwarder())
1573 sym
= this->symtab_
->resolve_forwards(sym
);
1574 unsigned int shndx
= 0;
1575 if (sym
->source() != Symbol::FROM_OBJECT
)
1577 // The symbol was defined by the linker (e.g., common).
1578 // We mark these symbols with a special SHNDX of -1,
1579 // but exclude linker-predefined symbols and symbols
1580 // copied from shared objects.
1581 if (!sym
->is_predefined()
1582 && !sym
->is_copied_from_dynobj())
1585 else if (sym
->object() == obj
&& sym
->is_defined())
1588 unsigned int orig_shndx
= sym
->shndx(&is_ordinary
);
1590 shndx
= index_map
[orig_shndx
];
1594 unsigned int symtab_index
= sym
->symtab_index();
1595 unsigned int chain
= 0;
1596 unsigned int first_reloc
= 0;
1597 unsigned int nrelocs
= obj
->get_incremental_reloc_count(i
);
1600 gold_assert(symtab_index
!= -1U
1601 && (symtab_index
- first_global_index
1602 < global_sym_count
));
1603 first_reloc
= obj
->get_incremental_reloc_base(i
);
1604 chain
= global_syms
[symtab_index
- first_global_index
];
1605 global_syms
[symtab_index
- first_global_index
] =
1608 Swap32::writeval(pov
, symtab_index
);
1609 Swap32::writeval(pov
+ 4, shndx
);
1610 Swap32::writeval(pov
+ 8, chain
);
1611 Swap32::writeval(pov
+ 12, nrelocs
);
1612 Swap32::writeval(pov
+ 16, first_reloc
* 3 * sizeof_addr
);
1616 // For each kept COMDAT group, write the group signature.
1617 for (unsigned int i
= 0; i
< ncomdat
; i
++)
1619 Stringpool::Key key
= entry
->get_comdat_signature_key(i
);
1620 off_t name_offset
= 0;
1622 name_offset
= strtab
->get_offset_from_key(key
);
1623 Swap32::writeval(pov
, name_offset
);
1631 case INCREMENTAL_INPUT_SHARED_LIBRARY
:
1633 gold_assert(static_cast<unsigned int>(pov
- oview
)
1634 == (*p
)->get_info_offset());
1635 Incremental_dynobj_entry
* entry
= (*p
)->dynobj_entry();
1636 gold_assert(entry
!= NULL
);
1637 Object
* obj
= entry
->object();
1638 Dynobj
* dynobj
= obj
->dynobj();
1639 gold_assert(dynobj
!= NULL
);
1640 const Object::Symbols
* syms
= obj
->get_global_symbols();
1642 // Write the soname string table index.
1643 section_offset_type soname_offset
=
1644 strtab
->get_offset_from_key(entry
->get_soname_key());
1645 Swap32::writeval(pov
, soname_offset
);
1648 // Skip the global symbol count for now.
1649 unsigned char* orig_pov
= pov
;
1652 // For each global symbol, write the global symbol table index.
1653 unsigned int nsyms
= syms
->size();
1654 unsigned int nsyms_out
= 0;
1655 for (unsigned int i
= 0; i
< nsyms
; i
++)
1657 const Symbol
* sym
= (*syms
)[i
];
1660 if (sym
->is_forwarder())
1661 sym
= this->symtab_
->resolve_forwards(sym
);
1662 if (sym
->symtab_index() == -1U)
1664 unsigned int flags
= 0;
1665 if (sym
->source() == Symbol::FROM_OBJECT
1666 && sym
->object() == obj
1667 && sym
->is_defined())
1668 flags
= INCREMENTAL_SHLIB_SYM_DEF
;
1669 else if (sym
->is_copied_from_dynobj()
1670 && this->symtab_
->get_copy_source(sym
) == dynobj
)
1671 flags
= INCREMENTAL_SHLIB_SYM_COPY
;
1672 flags
<<= INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT
;
1673 Swap32::writeval(pov
, sym
->symtab_index() | flags
);
1678 // Now write the global symbol count.
1679 Swap32::writeval(orig_pov
, nsyms_out
);
1683 case INCREMENTAL_INPUT_ARCHIVE
:
1685 gold_assert(static_cast<unsigned int>(pov
- oview
)
1686 == (*p
)->get_info_offset());
1687 Incremental_archive_entry
* entry
= (*p
)->archive_entry();
1688 gold_assert(entry
!= NULL
);
1690 // Write the member count and unused global symbol count.
1691 unsigned int nmembers
= entry
->get_member_count();
1692 unsigned int nsyms
= entry
->get_unused_global_symbol_count();
1693 Swap32::writeval(pov
, nmembers
);
1694 Swap32::writeval(pov
+ 4, nsyms
);
1697 // For each member, write the offset to its input file entry.
1698 for (unsigned int i
= 0; i
< nmembers
; ++i
)
1700 Incremental_object_entry
* member
= entry
->get_member(i
);
1701 Swap32::writeval(pov
, member
->get_offset());
1705 // For each global symbol, write the name offset.
1706 for (unsigned int i
= 0; i
< nsyms
; ++i
)
1708 Stringpool::Key key
= entry
->get_unused_global_symbol(i
);
1709 Swap32::writeval(pov
, strtab
->get_offset_from_key(key
));
1722 // Write the contents of the .gnu_incremental_symtab section.
1724 template<int size
, bool big_endian
>
1726 Output_section_incremental_inputs
<size
, big_endian
>::write_symtab(
1728 unsigned int* global_syms
,
1729 unsigned int global_sym_count
)
1731 for (unsigned int i
= 0; i
< global_sym_count
; ++i
)
1733 Swap32::writeval(pov
, global_syms
[i
]);
1738 // This struct holds the view information needed to write the
1739 // .gnu_incremental_got_plt section.
1741 struct Got_plt_view_info
1743 // Start of the GOT type array in the output view.
1744 unsigned char* got_type_p
;
1745 // Start of the GOT descriptor array in the output view.
1746 unsigned char* got_desc_p
;
1747 // Start of the PLT descriptor array in the output view.
1748 unsigned char* plt_desc_p
;
1749 // Number of GOT entries.
1750 unsigned int got_count
;
1751 // Number of PLT entries.
1752 unsigned int plt_count
;
1753 // Offset of the first non-reserved PLT entry (this is a target-dependent value).
1754 unsigned int first_plt_entry_offset
;
1755 // Size of a PLT entry (this is a target-dependent value).
1756 unsigned int plt_entry_size
;
1757 // Symbol index to write in the GOT descriptor array. For global symbols,
1758 // this is the global symbol table index; for local symbols, it is the
1759 // local symbol table index.
1760 unsigned int sym_index
;
1761 // Input file index to write in the GOT descriptor array. For global
1762 // symbols, this is 0; for local symbols, it is the index of the input
1763 // file entry in the .gnu_incremental_inputs section.
1764 unsigned int input_index
;
1767 // Functor class for processing a GOT offset list for local symbols.
1768 // Writes the GOT type and symbol index into the GOT type and descriptor
1769 // arrays in the output section.
1771 template<int size
, bool big_endian
>
1772 class Local_got_offset_visitor
: public Got_offset_list::Visitor
1775 Local_got_offset_visitor(struct Got_plt_view_info
& info
)
1780 visit(unsigned int got_type
, unsigned int got_offset
)
1782 unsigned int got_index
= got_offset
/ this->got_entry_size_
;
1783 gold_assert(got_index
< this->info_
.got_count
);
1784 // We can only handle GOT entry types in the range 0..0x7e
1785 // because we use a byte array to store them, and we use the
1786 // high bit to flag a local symbol.
1787 gold_assert(got_type
< 0x7f);
1788 this->info_
.got_type_p
[got_index
] = got_type
| 0x80;
1789 unsigned char* pov
= this->info_
.got_desc_p
+ got_index
* 8;
1790 elfcpp::Swap
<32, big_endian
>::writeval(pov
, this->info_
.sym_index
);
1791 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, this->info_
.input_index
);
1795 static const unsigned int got_entry_size_
= size
/ 8;
1796 struct Got_plt_view_info
& info_
;
1799 // Functor class for processing a GOT offset list. Writes the GOT type
1800 // and symbol index into the GOT type and descriptor arrays in the output
1803 template<int size
, bool big_endian
>
1804 class Global_got_offset_visitor
: public Got_offset_list::Visitor
1807 Global_got_offset_visitor(struct Got_plt_view_info
& info
)
1812 visit(unsigned int got_type
, unsigned int got_offset
)
1814 unsigned int got_index
= got_offset
/ this->got_entry_size_
;
1815 gold_assert(got_index
< this->info_
.got_count
);
1816 // We can only handle GOT entry types in the range 0..0x7e
1817 // because we use a byte array to store them, and we use the
1818 // high bit to flag a local symbol.
1819 gold_assert(got_type
< 0x7f);
1820 this->info_
.got_type_p
[got_index
] = got_type
;
1821 unsigned char* pov
= this->info_
.got_desc_p
+ got_index
* 8;
1822 elfcpp::Swap
<32, big_endian
>::writeval(pov
, this->info_
.sym_index
);
1823 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, 0);
1827 static const unsigned int got_entry_size_
= size
/ 8;
1828 struct Got_plt_view_info
& info_
;
1831 // Functor class for processing the global symbol table. Processes the
1832 // GOT offset list for the symbol, and writes the symbol table index
1833 // into the PLT descriptor array in the output section.
1835 template<int size
, bool big_endian
>
1836 class Global_symbol_visitor_got_plt
1839 Global_symbol_visitor_got_plt(struct Got_plt_view_info
& info
)
1844 operator()(const Sized_symbol
<size
>* sym
)
1846 typedef Global_got_offset_visitor
<size
, big_endian
> Got_visitor
;
1847 const Got_offset_list
* got_offsets
= sym
->got_offset_list();
1848 if (got_offsets
!= NULL
)
1850 this->info_
.sym_index
= sym
->symtab_index();
1851 this->info_
.input_index
= 0;
1852 Got_visitor
v(this->info_
);
1853 got_offsets
->for_all_got_offsets(&v
);
1855 if (sym
->has_plt_offset())
1857 unsigned int plt_index
=
1858 ((sym
->plt_offset() - this->info_
.first_plt_entry_offset
)
1859 / this->info_
.plt_entry_size
);
1860 gold_assert(plt_index
< this->info_
.plt_count
);
1861 unsigned char* pov
= this->info_
.plt_desc_p
+ plt_index
* 4;
1862 elfcpp::Swap
<32, big_endian
>::writeval(pov
, sym
->symtab_index());
1867 struct Got_plt_view_info
& info_
;
1870 // Write the contents of the .gnu_incremental_got_plt section.
1872 template<int size
, bool big_endian
>
1874 Output_section_incremental_inputs
<size
, big_endian
>::write_got_plt(
1878 Sized_target
<size
, big_endian
>* target
=
1879 parameters
->sized_target
<size
, big_endian
>();
1881 // Set up the view information for the functors.
1882 struct Got_plt_view_info view_info
;
1883 view_info
.got_count
= target
->got_entry_count();
1884 view_info
.plt_count
= target
->plt_entry_count();
1885 view_info
.first_plt_entry_offset
= target
->first_plt_entry_offset();
1886 view_info
.plt_entry_size
= target
->plt_entry_size();
1887 view_info
.got_type_p
= pov
+ 8;
1888 view_info
.got_desc_p
= (view_info
.got_type_p
1889 + ((view_info
.got_count
+ 3) & ~3));
1890 view_info
.plt_desc_p
= view_info
.got_desc_p
+ view_info
.got_count
* 8;
1892 gold_assert(pov
+ view_size
==
1893 view_info
.plt_desc_p
+ view_info
.plt_count
* 4);
1895 // Write the section header.
1896 Swap32::writeval(pov
, view_info
.got_count
);
1897 Swap32::writeval(pov
+ 4, view_info
.plt_count
);
1899 // Initialize the GOT type array to 0xff (reserved).
1900 memset(view_info
.got_type_p
, 0xff, view_info
.got_count
);
1902 // Write the incremental GOT descriptors for local symbols.
1903 typedef Local_got_offset_visitor
<size
, big_endian
> Got_visitor
;
1904 for (Incremental_inputs::Input_list::const_iterator p
=
1905 this->inputs_
->input_files().begin();
1906 p
!= this->inputs_
->input_files().end();
1909 if ((*p
)->type() != INCREMENTAL_INPUT_OBJECT
1910 && (*p
)->type() != INCREMENTAL_INPUT_ARCHIVE_MEMBER
)
1912 Incremental_object_entry
* entry
= (*p
)->object_entry();
1913 gold_assert(entry
!= NULL
);
1914 const Object
* obj
= entry
->object();
1915 gold_assert(obj
!= NULL
);
1916 view_info
.input_index
= (*p
)->get_file_index();
1917 Got_visitor
v(view_info
);
1918 obj
->for_all_local_got_entries(&v
);
1921 // Write the incremental GOT and PLT descriptors for global symbols.
1922 typedef Global_symbol_visitor_got_plt
<size
, big_endian
> Symbol_visitor
;
1923 symtab_
->for_all_symbols
<size
, Symbol_visitor
>(Symbol_visitor(view_info
));
1926 // Class Sized_relobj_incr. Most of these methods are not used for
1927 // Incremental objects, but are required to be implemented by the
1928 // base class Object.
1930 template<int size
, bool big_endian
>
1931 Sized_relobj_incr
<size
, big_endian
>::Sized_relobj_incr(
1932 const std::string
& name
,
1933 Sized_incremental_binary
<size
, big_endian
>* ibase
,
1934 unsigned int input_file_index
)
1935 : Sized_relobj
<size
, big_endian
>(name
, NULL
), ibase_(ibase
),
1936 input_file_index_(input_file_index
),
1937 input_reader_(ibase
->inputs_reader().input_file(input_file_index
)),
1938 local_symbol_count_(0), output_local_dynsym_count_(0),
1939 local_symbol_index_(0), local_symbol_offset_(0), local_dynsym_offset_(0),
1940 symbols_(), incr_reloc_offset_(-1U), incr_reloc_count_(0),
1941 incr_reloc_output_index_(0), incr_relocs_(NULL
), local_symbols_()
1943 if (this->input_reader_
.is_in_system_directory())
1944 this->set_is_in_system_directory();
1945 const unsigned int shnum
= this->input_reader_
.get_input_section_count() + 1;
1946 this->set_shnum(shnum
);
1947 ibase
->set_input_object(input_file_index
, this);
1950 // Read the symbols.
1952 template<int size
, bool big_endian
>
1954 Sized_relobj_incr
<size
, big_endian
>::do_read_symbols(Read_symbols_data
*)
1959 // Lay out the input sections.
1961 template<int size
, bool big_endian
>
1963 Sized_relobj_incr
<size
, big_endian
>::do_layout(
1968 const unsigned int shnum
= this->shnum();
1969 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
1970 gold_assert(incremental_inputs
!= NULL
);
1971 Output_sections
& out_sections(this->output_sections());
1972 out_sections
.resize(shnum
);
1973 this->section_offsets().resize(shnum
);
1974 for (unsigned int i
= 1; i
< shnum
; i
++)
1976 typename
Input_entry_reader::Input_section_info sect
=
1977 this->input_reader_
.get_input_section(i
- 1);
1978 // Add the section to the incremental inputs layout.
1979 incremental_inputs
->report_input_section(this, i
, sect
.name
,
1981 if (sect
.output_shndx
== 0 || sect
.sh_offset
== -1)
1983 Output_section
* os
= this->ibase_
->output_section(sect
.output_shndx
);
1984 gold_assert(os
!= NULL
);
1985 out_sections
[i
] = os
;
1986 this->section_offsets()[i
] = static_cast<Address
>(sect
.sh_offset
);
1989 // Process the COMDAT groups.
1990 unsigned int ncomdat
= this->input_reader_
.get_comdat_group_count();
1991 for (unsigned int i
= 0; i
< ncomdat
; i
++)
1993 const char* signature
= this->input_reader_
.get_comdat_group_signature(i
);
1994 if (signature
== NULL
|| signature
[0] == '\0')
1995 this->error(_("COMDAT group has no signature"));
1996 bool keep
= layout
->find_or_add_kept_section(signature
, this, i
, true,
1999 this->error(_("COMDAT group %s included twice in incremental link"),
2004 // Layout sections whose layout was deferred while waiting for
2005 // input files from a plugin.
2006 template<int size
, bool big_endian
>
2008 Sized_relobj_incr
<size
, big_endian
>::do_layout_deferred_sections(Layout
*)
2012 // Add the symbols to the symbol table.
2014 template<int size
, bool big_endian
>
2016 Sized_relobj_incr
<size
, big_endian
>::do_add_symbols(
2017 Symbol_table
* symtab
,
2021 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2022 unsigned char symbuf
[sym_size
];
2023 elfcpp::Sym
<size
, big_endian
> sym(symbuf
);
2024 elfcpp::Sym_write
<size
, big_endian
> osym(symbuf
);
2026 typedef typename
elfcpp::Elf_types
<size
>::Elf_WXword Elf_size_type
;
2028 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2029 this->symbols_
.resize(nsyms
);
2031 Incremental_binary::View
symtab_view(NULL
);
2032 unsigned int symtab_count
;
2033 elfcpp::Elf_strtab
strtab(NULL
, 0);
2034 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2036 Incremental_symtab_reader
<big_endian
> isymtab(this->ibase_
->symtab_reader());
2037 unsigned int isym_count
= isymtab
.symbol_count();
2038 unsigned int first_global
= symtab_count
- isym_count
;
2040 const unsigned char* sym_p
;
2041 for (unsigned int i
= 0; i
< nsyms
; ++i
)
2043 Incremental_global_symbol_reader
<big_endian
> info
=
2044 this->input_reader_
.get_global_symbol_reader(i
);
2045 unsigned int output_symndx
= info
.output_symndx();
2046 sym_p
= symtab_view
.data() + output_symndx
* sym_size
;
2047 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
2049 if (!strtab
.get_c_string(gsym
.get_st_name(), &name
))
2052 typename
elfcpp::Elf_types
<size
>::Elf_Addr v
= gsym
.get_st_value();
2053 unsigned int shndx
= gsym
.get_st_shndx();
2054 elfcpp::STB st_bind
= gsym
.get_st_bind();
2055 elfcpp::STT st_type
= gsym
.get_st_type();
2057 // Local hidden symbols start out as globals, but get converted to
2058 // to local during output.
2059 if (st_bind
== elfcpp::STB_LOCAL
)
2060 st_bind
= elfcpp::STB_GLOBAL
;
2062 unsigned int input_shndx
= info
.shndx();
2063 if (input_shndx
== 0 || input_shndx
== -1U)
2065 shndx
= elfcpp::SHN_UNDEF
;
2068 else if (shndx
!= elfcpp::SHN_ABS
)
2070 // Find the input section and calculate the section-relative value.
2071 gold_assert(shndx
!= elfcpp::SHN_UNDEF
);
2072 Output_section
* os
= this->ibase_
->output_section(shndx
);
2073 gold_assert(os
!= NULL
&& os
->has_fixed_layout());
2074 typename
Input_entry_reader::Input_section_info sect
=
2075 this->input_reader_
.get_input_section(input_shndx
- 1);
2076 gold_assert(sect
.output_shndx
== shndx
);
2077 if (st_type
!= elfcpp::STT_TLS
)
2079 v
-= sect
.sh_offset
;
2080 shndx
= input_shndx
;
2083 osym
.put_st_name(0);
2084 osym
.put_st_value(v
);
2085 osym
.put_st_size(gsym
.get_st_size());
2086 osym
.put_st_info(st_bind
, st_type
);
2087 osym
.put_st_other(gsym
.get_st_other());
2088 osym
.put_st_shndx(shndx
);
2090 Symbol
* res
= symtab
->add_from_incrobj(this, name
, NULL
, &sym
);
2092 // If this is a linker-defined symbol that hasn't yet been defined,
2094 if (input_shndx
== -1U && !res
->is_defined())
2096 shndx
= gsym
.get_st_shndx();
2097 v
= gsym
.get_st_value();
2098 Elf_size_type symsize
= gsym
.get_st_size();
2099 if (shndx
== elfcpp::SHN_ABS
)
2101 symtab
->define_as_constant(name
, NULL
,
2102 Symbol_table::INCREMENTAL_BASE
,
2103 v
, symsize
, st_type
, st_bind
,
2104 gsym
.get_st_visibility(), 0,
2109 Output_section
* os
= this->ibase_
->output_section(shndx
);
2110 gold_assert(os
!= NULL
&& os
->has_fixed_layout());
2113 os
->reserve(v
, symsize
);
2114 symtab
->define_in_output_data(name
, NULL
,
2115 Symbol_table::INCREMENTAL_BASE
,
2116 os
, v
, symsize
, st_type
, st_bind
,
2117 gsym
.get_st_visibility(), 0,
2122 this->symbols_
[i
] = res
;
2123 this->ibase_
->add_global_symbol(output_symndx
- first_global
, res
);
2127 // Return TRUE if we should include this object from an archive library.
2129 template<int size
, bool big_endian
>
2130 Archive::Should_include
2131 Sized_relobj_incr
<size
, big_endian
>::do_should_include_member(
2140 // Iterate over global symbols, calling a visitor class V for each.
2142 template<int size
, bool big_endian
>
2144 Sized_relobj_incr
<size
, big_endian
>::do_for_all_global_symbols(
2146 Library_base::Symbol_visitor_base
*)
2148 // This routine is not used for incremental objects.
2151 // Get the size of a section.
2153 template<int size
, bool big_endian
>
2155 Sized_relobj_incr
<size
, big_endian
>::do_section_size(unsigned int)
2160 // Get the name of a section.
2162 template<int size
, bool big_endian
>
2164 Sized_relobj_incr
<size
, big_endian
>::do_section_name(unsigned int)
2169 // Return a view of the contents of a section.
2171 template<int size
, bool big_endian
>
2173 Sized_relobj_incr
<size
, big_endian
>::do_section_contents(unsigned int)
2178 // Return section flags.
2180 template<int size
, bool big_endian
>
2182 Sized_relobj_incr
<size
, big_endian
>::do_section_flags(unsigned int)
2187 // Return section entsize.
2189 template<int size
, bool big_endian
>
2191 Sized_relobj_incr
<size
, big_endian
>::do_section_entsize(unsigned int)
2196 // Return section address.
2198 template<int size
, bool big_endian
>
2200 Sized_relobj_incr
<size
, big_endian
>::do_section_address(unsigned int)
2205 // Return section type.
2207 template<int size
, bool big_endian
>
2209 Sized_relobj_incr
<size
, big_endian
>::do_section_type(unsigned int)
2214 // Return the section link field.
2216 template<int size
, bool big_endian
>
2218 Sized_relobj_incr
<size
, big_endian
>::do_section_link(unsigned int)
2223 // Return the section link field.
2225 template<int size
, bool big_endian
>
2227 Sized_relobj_incr
<size
, big_endian
>::do_section_info(unsigned int)
2232 // Return the section alignment.
2234 template<int size
, bool big_endian
>
2236 Sized_relobj_incr
<size
, big_endian
>::do_section_addralign(unsigned int)
2241 // Return the Xindex structure to use.
2243 template<int size
, bool big_endian
>
2245 Sized_relobj_incr
<size
, big_endian
>::do_initialize_xindex()
2250 // Get symbol counts.
2252 template<int size
, bool big_endian
>
2254 Sized_relobj_incr
<size
, big_endian
>::do_get_global_symbol_counts(
2255 const Symbol_table
*, size_t*, size_t*) const
2262 template<int size
, bool big_endian
>
2264 Sized_relobj_incr
<size
, big_endian
>::do_read_relocs(Read_relocs_data
*)
2268 // Process the relocs to find list of referenced sections. Used only
2269 // during garbage collection.
2271 template<int size
, bool big_endian
>
2273 Sized_relobj_incr
<size
, big_endian
>::do_gc_process_relocs(Symbol_table
*,
2280 // Scan the relocs and adjust the symbol table.
2282 template<int size
, bool big_endian
>
2284 Sized_relobj_incr
<size
, big_endian
>::do_scan_relocs(Symbol_table
*,
2288 // Count the incremental relocations for this object.
2289 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2290 this->allocate_incremental_reloc_counts();
2291 for (unsigned int i
= 0; i
< nsyms
; i
++)
2293 Incremental_global_symbol_reader
<big_endian
> sym
=
2294 this->input_reader_
.get_global_symbol_reader(i
);
2295 unsigned int reloc_count
= sym
.reloc_count();
2296 if (reloc_count
> 0 && this->incr_reloc_offset_
== -1U)
2297 this->incr_reloc_offset_
= sym
.reloc_offset();
2298 this->incr_reloc_count_
+= reloc_count
;
2299 for (unsigned int j
= 0; j
< reloc_count
; j
++)
2300 this->count_incremental_reloc(i
);
2302 this->incr_reloc_output_index_
=
2303 layout
->incremental_inputs()->get_reloc_count();
2304 this->finalize_incremental_relocs(layout
, false);
2306 // The incoming incremental relocations may not end up in the same
2307 // location after the incremental update, because the incremental info
2308 // is regenerated in each link. Because the new location may overlap
2309 // with other data in the updated output file, we need to copy the
2310 // relocations into a buffer so that we can still read them safely
2311 // after we start writing updates to the output file.
2312 if (this->incr_reloc_count_
> 0)
2314 const Incremental_relocs_reader
<size
, big_endian
>& relocs_reader
=
2315 this->ibase_
->relocs_reader();
2316 const unsigned int incr_reloc_size
= relocs_reader
.reloc_size
;
2317 unsigned int len
= this->incr_reloc_count_
* incr_reloc_size
;
2318 this->incr_relocs_
= new unsigned char[len
];
2319 memcpy(this->incr_relocs_
,
2320 relocs_reader
.data(this->incr_reloc_offset_
),
2325 // Count the local symbols.
2327 template<int size
, bool big_endian
>
2329 Sized_relobj_incr
<size
, big_endian
>::do_count_local_symbols(
2330 Stringpool_template
<char>* pool
,
2331 Stringpool_template
<char>*)
2333 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2335 // Set the count of local symbols based on the incremental info.
2336 unsigned int nlocals
= this->input_reader_
.get_local_symbol_count();
2337 this->local_symbol_count_
= nlocals
;
2338 this->local_symbols_
.reserve(nlocals
);
2340 // Get views of the base file's symbol table and string table.
2341 Incremental_binary::View
symtab_view(NULL
);
2342 unsigned int symtab_count
;
2343 elfcpp::Elf_strtab
strtab(NULL
, 0);
2344 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2346 // Read the local symbols from the base file's symbol table.
2347 off_t off
= this->input_reader_
.get_local_symbol_offset();
2348 const unsigned char* symp
= symtab_view
.data() + off
;
2349 for (unsigned int i
= 0; i
< nlocals
; ++i
, symp
+= sym_size
)
2351 elfcpp::Sym
<size
, big_endian
> sym(symp
);
2353 if (!strtab
.get_c_string(sym
.get_st_name(), &name
))
2355 gold_debug(DEBUG_INCREMENTAL
, "Local symbol %d: %s", i
, name
);
2356 name
= pool
->add(name
, true, NULL
);
2357 this->local_symbols_
.push_back(Local_symbol(name
,
2366 // Finalize the local symbols.
2368 template<int size
, bool big_endian
>
2370 Sized_relobj_incr
<size
, big_endian
>::do_finalize_local_symbols(
2375 this->local_symbol_index_
= index
;
2376 this->local_symbol_offset_
= off
;
2377 return index
+ this->local_symbol_count_
;
2380 // Set the offset where local dynamic symbol information will be stored.
2382 template<int size
, bool big_endian
>
2384 Sized_relobj_incr
<size
, big_endian
>::do_set_local_dynsym_indexes(
2387 // FIXME: set local dynsym indexes.
2391 // Set the offset where local dynamic symbol information will be stored.
2393 template<int size
, bool big_endian
>
2395 Sized_relobj_incr
<size
, big_endian
>::do_set_local_dynsym_offset(off_t
)
2400 // Relocate the input sections and write out the local symbols.
2401 // We don't actually do any relocation here. For unchanged input files,
2402 // we reapply relocations only for symbols that have changed; that happens
2403 // in queue_final_tasks. We do need to rewrite the incremental relocations
2406 template<int size
, bool big_endian
>
2408 Sized_relobj_incr
<size
, big_endian
>::do_relocate(const Symbol_table
*,
2409 const Layout
* layout
,
2412 if (this->incr_reloc_count_
== 0)
2415 const unsigned int incr_reloc_size
=
2416 Incremental_relocs_reader
<size
, big_endian
>::reloc_size
;
2418 // Get a view for the .gnu_incremental_relocs section.
2419 Incremental_inputs
* inputs
= layout
->incremental_inputs();
2420 gold_assert(inputs
!= NULL
);
2421 const off_t relocs_off
= inputs
->relocs_section()->offset();
2422 const off_t relocs_size
= inputs
->relocs_section()->data_size();
2423 unsigned char* const view
= of
->get_output_view(relocs_off
, relocs_size
);
2425 // Copy the relocations from the buffer.
2426 off_t off
= this->incr_reloc_output_index_
* incr_reloc_size
;
2427 unsigned int len
= this->incr_reloc_count_
* incr_reloc_size
;
2428 memcpy(view
+ off
, this->incr_relocs_
, len
);
2430 // The output section table may have changed, so we need to map
2431 // the old section index to the new section index for each relocation.
2432 for (unsigned int i
= 0; i
< this->incr_reloc_count_
; ++i
)
2434 unsigned char* pov
= view
+ off
+ i
* incr_reloc_size
;
2435 unsigned int shndx
= elfcpp::Swap
<32, big_endian
>::readval(pov
+ 4);
2436 Output_section
* os
= this->ibase_
->output_section(shndx
);
2437 gold_assert(os
!= NULL
);
2438 shndx
= os
->out_shndx();
2439 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, shndx
);
2442 of
->write_output_view(off
, len
, view
);
2444 // Get views into the output file for the portions of the symbol table
2445 // and the dynamic symbol table that we will be writing.
2446 off_t symtab_off
= layout
->symtab_section()->offset();
2447 off_t output_size
= this->local_symbol_count_
* This::sym_size
;
2448 unsigned char* oview
= NULL
;
2449 if (output_size
> 0)
2450 oview
= of
->get_output_view(symtab_off
+ this->local_symbol_offset_
,
2453 off_t dyn_output_size
= this->output_local_dynsym_count_
* sym_size
;
2454 unsigned char* dyn_oview
= NULL
;
2455 if (dyn_output_size
> 0)
2456 dyn_oview
= of
->get_output_view(this->local_dynsym_offset_
,
2459 // Write the local symbols.
2460 unsigned char* ov
= oview
;
2461 unsigned char* dyn_ov
= dyn_oview
;
2462 const Stringpool
* sympool
= layout
->sympool();
2463 const Stringpool
* dynpool
= layout
->dynpool();
2464 Output_symtab_xindex
* symtab_xindex
= layout
->symtab_xindex();
2465 Output_symtab_xindex
* dynsym_xindex
= layout
->dynsym_xindex();
2466 for (unsigned int i
= 0; i
< this->local_symbol_count_
; ++i
)
2468 Local_symbol
& lsym(this->local_symbols_
[i
]);
2471 unsigned int st_shndx
= this->adjust_sym_shndx(i
, lsym
.st_shndx
,
2475 Output_section
* os
= this->ibase_
->output_section(st_shndx
);
2476 st_shndx
= os
->out_shndx();
2477 if (st_shndx
>= elfcpp::SHN_LORESERVE
)
2479 symtab_xindex
->add(this->local_symbol_index_
+ i
, st_shndx
);
2480 if (lsym
.needs_dynsym_entry
)
2481 dynsym_xindex
->add(lsym
.output_dynsym_index
, st_shndx
);
2482 st_shndx
= elfcpp::SHN_XINDEX
;
2486 // Write the symbol to the output symbol table.
2488 elfcpp::Sym_write
<size
, big_endian
> osym(ov
);
2489 osym
.put_st_name(sympool
->get_offset(lsym
.name
));
2490 osym
.put_st_value(lsym
.st_value
);
2491 osym
.put_st_size(lsym
.st_size
);
2492 osym
.put_st_info(elfcpp::STB_LOCAL
,
2493 static_cast<elfcpp::STT
>(lsym
.st_type
));
2494 osym
.put_st_other(0);
2495 osym
.put_st_shndx(st_shndx
);
2499 // Write the symbol to the output dynamic symbol table.
2500 if (lsym
.needs_dynsym_entry
)
2502 gold_assert(dyn_ov
< dyn_oview
+ dyn_output_size
);
2503 elfcpp::Sym_write
<size
, big_endian
> osym(dyn_ov
);
2504 osym
.put_st_name(dynpool
->get_offset(lsym
.name
));
2505 osym
.put_st_value(lsym
.st_value
);
2506 osym
.put_st_size(lsym
.st_size
);
2507 osym
.put_st_info(elfcpp::STB_LOCAL
,
2508 static_cast<elfcpp::STT
>(lsym
.st_type
));
2509 osym
.put_st_other(0);
2510 osym
.put_st_shndx(st_shndx
);
2515 if (output_size
> 0)
2517 gold_assert(ov
- oview
== output_size
);
2518 of
->write_output_view(symtab_off
+ this->local_symbol_offset_
,
2519 output_size
, oview
);
2522 if (dyn_output_size
> 0)
2524 gold_assert(dyn_ov
- dyn_oview
== dyn_output_size
);
2525 of
->write_output_view(this->local_dynsym_offset_
, dyn_output_size
,
2530 // Set the offset of a section.
2532 template<int size
, bool big_endian
>
2534 Sized_relobj_incr
<size
, big_endian
>::do_set_section_offset(unsigned int,
2539 // Class Sized_incr_dynobj. Most of these methods are not used for
2540 // Incremental objects, but are required to be implemented by the
2541 // base class Object.
2543 template<int size
, bool big_endian
>
2544 Sized_incr_dynobj
<size
, big_endian
>::Sized_incr_dynobj(
2545 const std::string
& name
,
2546 Sized_incremental_binary
<size
, big_endian
>* ibase
,
2547 unsigned int input_file_index
)
2548 : Dynobj(name
, NULL
), ibase_(ibase
),
2549 input_file_index_(input_file_index
),
2550 input_reader_(ibase
->inputs_reader().input_file(input_file_index
)),
2553 if (this->input_reader_
.is_in_system_directory())
2554 this->set_is_in_system_directory();
2555 if (this->input_reader_
.as_needed())
2556 this->set_as_needed();
2557 this->set_soname_string(this->input_reader_
.get_soname());
2561 // Read the symbols.
2563 template<int size
, bool big_endian
>
2565 Sized_incr_dynobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
*)
2570 // Lay out the input sections.
2572 template<int size
, bool big_endian
>
2574 Sized_incr_dynobj
<size
, big_endian
>::do_layout(
2581 // Add the symbols to the symbol table.
2583 template<int size
, bool big_endian
>
2585 Sized_incr_dynobj
<size
, big_endian
>::do_add_symbols(
2586 Symbol_table
* symtab
,
2590 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2591 unsigned char symbuf
[sym_size
];
2592 elfcpp::Sym
<size
, big_endian
> sym(symbuf
);
2593 elfcpp::Sym_write
<size
, big_endian
> osym(symbuf
);
2595 typedef typename
elfcpp::Elf_types
<size
>::Elf_WXword Elf_size_type
;
2597 unsigned int nsyms
= this->input_reader_
.get_global_symbol_count();
2598 this->symbols_
.resize(nsyms
);
2600 Incremental_binary::View
symtab_view(NULL
);
2601 unsigned int symtab_count
;
2602 elfcpp::Elf_strtab
strtab(NULL
, 0);
2603 this->ibase_
->get_symtab_view(&symtab_view
, &symtab_count
, &strtab
);
2605 Incremental_symtab_reader
<big_endian
> isymtab(this->ibase_
->symtab_reader());
2606 unsigned int isym_count
= isymtab
.symbol_count();
2607 unsigned int first_global
= symtab_count
- isym_count
;
2609 // We keep a set of symbols that we have generated COPY relocations
2610 // for, indexed by the symbol value. We do not need more than one
2611 // COPY relocation per address.
2612 typedef typename
std::set
<Address
> Copied_symbols
;
2613 Copied_symbols copied_symbols
;
2615 const unsigned char* sym_p
;
2616 for (unsigned int i
= 0; i
< nsyms
; ++i
)
2620 unsigned int output_symndx
=
2621 this->input_reader_
.get_output_symbol_index(i
, &is_def
, &is_copy
);
2622 sym_p
= symtab_view
.data() + output_symndx
* sym_size
;
2623 elfcpp::Sym
<size
, big_endian
> gsym(sym_p
);
2625 if (!strtab
.get_c_string(gsym
.get_st_name(), &name
))
2630 elfcpp::STB st_bind
= gsym
.get_st_bind();
2631 elfcpp::STT st_type
= gsym
.get_st_type();
2633 // Local hidden symbols start out as globals, but get converted to
2634 // to local during output.
2635 if (st_bind
== elfcpp::STB_LOCAL
)
2636 st_bind
= elfcpp::STB_GLOBAL
;
2640 shndx
= elfcpp::SHN_UNDEF
;
2645 // For a symbol defined in a shared object, the section index
2646 // is meaningless, as long as it's not SHN_UNDEF.
2648 v
= gsym
.get_st_value();
2651 osym
.put_st_name(0);
2652 osym
.put_st_value(v
);
2653 osym
.put_st_size(gsym
.get_st_size());
2654 osym
.put_st_info(st_bind
, st_type
);
2655 osym
.put_st_other(gsym
.get_st_other());
2656 osym
.put_st_shndx(shndx
);
2658 Sized_symbol
<size
>* res
=
2659 symtab
->add_from_incrobj
<size
, big_endian
>(this, name
, NULL
, &sym
);
2660 this->symbols_
[i
] = res
;
2661 this->ibase_
->add_global_symbol(output_symndx
- first_global
,
2666 std::pair
<typename
Copied_symbols::iterator
, bool> ins
=
2667 copied_symbols
.insert(v
);
2670 unsigned int shndx
= gsym
.get_st_shndx();
2671 Output_section
* os
= this->ibase_
->output_section(shndx
);
2672 off_t offset
= v
- os
->address();
2673 this->ibase_
->add_copy_reloc(this->symbols_
[i
], os
, offset
);
2679 // Return TRUE if we should include this object from an archive library.
2681 template<int size
, bool big_endian
>
2682 Archive::Should_include
2683 Sized_incr_dynobj
<size
, big_endian
>::do_should_include_member(
2692 // Iterate over global symbols, calling a visitor class V for each.
2694 template<int size
, bool big_endian
>
2696 Sized_incr_dynobj
<size
, big_endian
>::do_for_all_global_symbols(
2698 Library_base::Symbol_visitor_base
*)
2700 // This routine is not used for dynamic libraries.
2703 // Iterate over local symbols, calling a visitor class V for each GOT offset
2704 // associated with a local symbol.
2706 template<int size
, bool big_endian
>
2708 Sized_incr_dynobj
<size
, big_endian
>::do_for_all_local_got_entries(
2709 Got_offset_list::Visitor
*) const
2713 // Get the size of a section.
2715 template<int size
, bool big_endian
>
2717 Sized_incr_dynobj
<size
, big_endian
>::do_section_size(unsigned int)
2722 // Get the name of a section.
2724 template<int size
, bool big_endian
>
2726 Sized_incr_dynobj
<size
, big_endian
>::do_section_name(unsigned int)
2731 // Return a view of the contents of a section.
2733 template<int size
, bool big_endian
>
2735 Sized_incr_dynobj
<size
, big_endian
>::do_section_contents(unsigned int)
2740 // Return section flags.
2742 template<int size
, bool big_endian
>
2744 Sized_incr_dynobj
<size
, big_endian
>::do_section_flags(unsigned int)
2749 // Return section entsize.
2751 template<int size
, bool big_endian
>
2753 Sized_incr_dynobj
<size
, big_endian
>::do_section_entsize(unsigned int)
2758 // Return section address.
2760 template<int size
, bool big_endian
>
2762 Sized_incr_dynobj
<size
, big_endian
>::do_section_address(unsigned int)
2767 // Return section type.
2769 template<int size
, bool big_endian
>
2771 Sized_incr_dynobj
<size
, big_endian
>::do_section_type(unsigned int)
2776 // Return the section link field.
2778 template<int size
, bool big_endian
>
2780 Sized_incr_dynobj
<size
, big_endian
>::do_section_link(unsigned int)
2785 // Return the section link field.
2787 template<int size
, bool big_endian
>
2789 Sized_incr_dynobj
<size
, big_endian
>::do_section_info(unsigned int)
2794 // Return the section alignment.
2796 template<int size
, bool big_endian
>
2798 Sized_incr_dynobj
<size
, big_endian
>::do_section_addralign(unsigned int)
2803 // Return the Xindex structure to use.
2805 template<int size
, bool big_endian
>
2807 Sized_incr_dynobj
<size
, big_endian
>::do_initialize_xindex()
2812 // Get symbol counts.
2814 template<int size
, bool big_endian
>
2816 Sized_incr_dynobj
<size
, big_endian
>::do_get_global_symbol_counts(
2817 const Symbol_table
*, size_t*, size_t*) const
2822 // Allocate an incremental object of the appropriate size and endianness.
2825 make_sized_incremental_object(
2826 Incremental_binary
* ibase
,
2827 unsigned int input_file_index
,
2828 Incremental_input_type input_type
,
2829 const Incremental_binary::Input_reader
* input_reader
)
2832 std::string
name(input_reader
->filename());
2834 switch (parameters
->size_and_endianness())
2836 #ifdef HAVE_TARGET_32_LITTLE
2837 case Parameters::TARGET_32_LITTLE
:
2839 Sized_incremental_binary
<32, false>* sized_ibase
=
2840 static_cast<Sized_incremental_binary
<32, false>*>(ibase
);
2841 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2842 obj
= new Sized_incr_dynobj
<32, false>(name
, sized_ibase
,
2845 obj
= new Sized_relobj_incr
<32, false>(name
, sized_ibase
,
2850 #ifdef HAVE_TARGET_32_BIG
2851 case Parameters::TARGET_32_BIG
:
2853 Sized_incremental_binary
<32, true>* sized_ibase
=
2854 static_cast<Sized_incremental_binary
<32, true>*>(ibase
);
2855 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2856 obj
= new Sized_incr_dynobj
<32, true>(name
, sized_ibase
,
2859 obj
= new Sized_relobj_incr
<32, true>(name
, sized_ibase
,
2864 #ifdef HAVE_TARGET_64_LITTLE
2865 case Parameters::TARGET_64_LITTLE
:
2867 Sized_incremental_binary
<64, false>* sized_ibase
=
2868 static_cast<Sized_incremental_binary
<64, false>*>(ibase
);
2869 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2870 obj
= new Sized_incr_dynobj
<64, false>(name
, sized_ibase
,
2873 obj
= new Sized_relobj_incr
<64, false>(name
, sized_ibase
,
2878 #ifdef HAVE_TARGET_64_BIG
2879 case Parameters::TARGET_64_BIG
:
2881 Sized_incremental_binary
<64, true>* sized_ibase
=
2882 static_cast<Sized_incremental_binary
<64, true>*>(ibase
);
2883 if (input_type
== INCREMENTAL_INPUT_SHARED_LIBRARY
)
2884 obj
= new Sized_incr_dynobj
<64, true>(name
, sized_ibase
,
2887 obj
= new Sized_relobj_incr
<64, true>(name
, sized_ibase
,
2896 gold_assert(obj
!= NULL
);
2900 // Copy the unused symbols from the incremental input info.
2901 // We need to do this because we may be overwriting the incremental
2902 // input info in the base file before we write the new incremental
2905 Incremental_library::copy_unused_symbols()
2907 unsigned int symcount
= this->input_reader_
->get_unused_symbol_count();
2908 this->unused_symbols_
.reserve(symcount
);
2909 for (unsigned int i
= 0; i
< symcount
; ++i
)
2911 std::string
name(this->input_reader_
->get_unused_symbol(i
));
2912 this->unused_symbols_
.push_back(name
);
2916 // Iterator for unused global symbols in the library.
2918 Incremental_library::do_for_all_unused_symbols(Symbol_visitor_base
* v
) const
2920 for (Symbol_list::const_iterator p
= this->unused_symbols_
.begin();
2921 p
!= this->unused_symbols_
.end();
2923 v
->visit(p
->c_str());
2926 // Instantiate the templates we need.
2928 #ifdef HAVE_TARGET_32_LITTLE
2930 class Sized_incremental_binary
<32, false>;
2933 class Sized_relobj_incr
<32, false>;
2936 class Sized_incr_dynobj
<32, false>;
2939 #ifdef HAVE_TARGET_32_BIG
2941 class Sized_incremental_binary
<32, true>;
2944 class Sized_relobj_incr
<32, true>;
2947 class Sized_incr_dynobj
<32, true>;
2950 #ifdef HAVE_TARGET_64_LITTLE
2952 class Sized_incremental_binary
<64, false>;
2955 class Sized_relobj_incr
<64, false>;
2958 class Sized_incr_dynobj
<64, false>;
2961 #ifdef HAVE_TARGET_64_BIG
2963 class Sized_incremental_binary
<64, true>;
2966 class Sized_relobj_incr
<64, true>;
2969 class Sized_incr_dynobj
<64, true>;
2972 } // End namespace gold.