1 // dwp.cc -- DWARF packaging utility
3 // Copyright 2012 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of dwp, the DWARF packaging utility.
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.
36 #include "libiberty.h"
37 #include "../bfd/bfdver.h"
40 #include "elfcpp_file.h"
41 #include "dirsearch.h"
44 #include "compressed_output.h"
45 #include "stringpool.h"
46 #include "dwarf_reader.h"
49 usage(FILE* fd
, int) ATTRIBUTE_NORETURN
;
52 print_version() ATTRIBUTE_NORETURN
;
56 class Dwp_output_file
;
59 // This class may represent either a .dwo file or a .dwp file
60 // produced by an earlier run.
62 template <int size
, bool big_endian
>
63 class Sized_relobj_dwo
;
68 Dwo_file(const char* name
)
69 : name_(name
), obj_(NULL
), input_file_(NULL
), is_compressed_(),
75 // Read the input file and send its contents to OUTPUT_FILE.
77 read(Dwp_output_file
* output_file
);
80 // Types for mapping input string offsets to output string offsets.
81 typedef std::pair
<section_offset_type
, section_offset_type
>
83 typedef std::vector
<Str_offset_map_entry
> Str_offset_map
;
85 // A less-than comparison routine for Str_offset_map.
89 operator()(const Str_offset_map_entry
& i1
,
90 const Str_offset_map_entry
& i2
) const
91 { return i1
.first
< i2
.first
; }
94 // Create a Sized_relobj_dwo of the given size and endianness,
95 // and record the target info. P is a pointer to the ELF header
98 make_object(int size
, bool big_endian
, const unsigned char* p
,
99 Input_file
* input_file
, Dwp_output_file
* output_file
);
101 template <int size
, bool big_endian
>
103 sized_make_object(const unsigned char* p
, Input_file
* input_file
,
104 Dwp_output_file
* output_file
);
106 // Return the number of sections in the input object file.
109 { return this->obj_
->shnum(); }
111 // Return section type.
113 section_type(unsigned int shndx
)
114 { return this->obj_
->section_type(shndx
); }
116 // Get the name of a section.
118 section_name(unsigned int shndx
)
119 { return this->obj_
->section_name(shndx
); }
121 // Return a view of the contents of a section, decompressed if necessary.
122 // Set *PLEN to the size. Set *IS_NEW to true if the contents need to be
123 // deleted by the caller.
125 section_contents(unsigned int shndx
, section_size_type
* plen
, bool* is_new
)
126 { return this->obj_
->decompressed_section_contents(shndx
, plen
, is_new
); }
128 // Read the .debug_cu_index section of a .dwp file,
129 // and process the CU sets.
131 read_compunit_index(unsigned int, Dwp_output_file
*);
133 template <bool big_endian
>
135 sized_read_compunit_index(unsigned int, Dwp_output_file
*);
137 // Read the .debug_tu_index section of a .dwp file,
138 // and process the TU sets.
140 read_typeunit_index(unsigned int, Dwp_output_file
*);
142 template <bool big_endian
>
144 sized_read_typeunit_index(unsigned int, Dwp_output_file
*);
146 // Merge the input string table section into the output file.
148 add_strings(Dwp_output_file
*, unsigned int);
150 // Copy a section from the input file to the output file.
152 copy_section(Dwp_output_file
* output_file
, unsigned int shndx
,
153 const char* section_name
, bool is_str_offsets
);
155 // Remap the string offsets in the .debug_str_offsets.dwo section.
157 remap_str_offsets(const unsigned char* contents
, section_size_type len
);
159 template <bool big_endian
>
161 sized_remap_str_offsets(const unsigned char* contents
, section_size_type len
);
163 // Remap a single string offsets from an offset in the input string table
164 // to an offset in the output string table.
166 remap_str_offset(section_offset_type val
);
168 // Add a set of .debug_info and related sections to OUTPUT_FILE.
170 add_cu_set(Dwp_output_file
* output_file
,
172 unsigned int debug_info
,
173 unsigned int debug_abbrev
,
174 unsigned int debug_line
,
175 unsigned int debug_loc
,
176 unsigned int debug_str_offsets
,
177 unsigned int debug_macinfo
,
178 unsigned int debug_macro
);
180 // Add a set of .debug_types and related sections to OUTPUT_FILE.
182 add_tu_set(Dwp_output_file
* output_file
,
184 unsigned int debug_types
,
185 unsigned int debug_abbrev
,
186 unsigned int debug_line
,
187 unsigned int debug_str_offsets
);
191 // The ELF file, represented as a gold Relobj instance.
193 // The Input_file object.
194 Input_file
* input_file_
;
195 // Flags indicating which sections are compressed.
196 std::vector
<bool> is_compressed_
;
197 // Map input section index onto output section index.
198 std::vector
<unsigned int> shndx_map_
;
199 // Map input string offsets to output string offsets.
200 Str_offset_map str_offset_map_
;
203 // An ELF input file.
204 // We derive from Sized_relobj so that we can use interfaces
205 // in libgold to access the file.
207 template <int size
, bool big_endian
>
208 class Sized_relobj_dwo
: public Sized_relobj
<size
, big_endian
>
211 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
212 typedef typename Sized_relobj
<size
, big_endian
>::Symbols Symbols
;
214 Sized_relobj_dwo(const char* name
, Input_file
* input_file
,
215 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
216 : Sized_relobj
<size
, big_endian
>(name
, input_file
),
217 elf_file_(this, ehdr
)
223 // Setup the section information.
228 // Return section type.
230 do_section_type(unsigned int shndx
)
231 { return this->elf_file_
.section_type(shndx
); }
233 // Get the name of a section.
235 do_section_name(unsigned int shndx
)
236 { return this->elf_file_
.section_name(shndx
); }
238 // Get the size of a section.
240 do_section_size(unsigned int shndx
)
241 { return this->elf_file_
.section_size(shndx
); }
243 // Return a view of the contents of a section.
245 do_section_contents(unsigned int, section_size_type
*, bool);
247 // Return a view of the uncompressed contents of a section. Set *PLEN
248 // to the size. Set *IS_NEW to true if the contents need to be deleted
251 do_decompressed_section_contents(unsigned int shndx
,
252 section_size_type
* plen
,
255 // The following virtual functions are abstract in the base classes,
256 // but are not used here.
260 do_read_symbols(Read_symbols_data
*)
261 { gold_unreachable(); }
263 // Lay out the input sections.
265 do_layout(Symbol_table
*, Layout
*, Read_symbols_data
*)
266 { gold_unreachable(); }
268 // Layout sections whose layout was deferred while waiting for
269 // input files from a plugin.
271 do_layout_deferred_sections(Layout
*)
272 { gold_unreachable(); }
274 // Add the symbols to the symbol table.
276 do_add_symbols(Symbol_table
*, Read_symbols_data
*, Layout
*)
277 { gold_unreachable(); }
279 Archive::Should_include
280 do_should_include_member(Symbol_table
*, Layout
*, Read_symbols_data
*,
282 { gold_unreachable(); }
284 // Iterate over global symbols, calling a visitor class V for each.
286 do_for_all_global_symbols(Read_symbols_data
*,
287 Library_base::Symbol_visitor_base
*)
288 { gold_unreachable(); }
290 // Return section flags.
292 do_section_flags(unsigned int)
293 { gold_unreachable(); }
295 // Return section entsize.
297 do_section_entsize(unsigned int)
298 { gold_unreachable(); }
300 // Return section address.
302 do_section_address(unsigned int)
303 { gold_unreachable(); }
305 // Return the section link field.
307 do_section_link(unsigned int)
308 { gold_unreachable(); }
310 // Return the section link field.
312 do_section_info(unsigned int)
313 { gold_unreachable(); }
315 // Return the section alignment.
317 do_section_addralign(unsigned int)
318 { gold_unreachable(); }
320 // Return the Xindex structure to use.
322 do_initialize_xindex()
323 { gold_unreachable(); }
325 // Get symbol counts.
327 do_get_global_symbol_counts(const Symbol_table
*, size_t*, size_t*) const
328 { gold_unreachable(); }
330 // Get global symbols.
332 do_get_global_symbols() const
335 // Return the value of a local symbol.
337 do_local_symbol_value(unsigned int, uint64_t) const
338 { gold_unreachable(); }
341 do_local_plt_offset(unsigned int) const
342 { gold_unreachable(); }
344 // Return whether local symbol SYMNDX is a TLS symbol.
346 do_local_is_tls(unsigned int) const
347 { gold_unreachable(); }
349 // Return the number of local symbols.
351 do_local_symbol_count() const
352 { gold_unreachable(); }
354 // Return the number of local symbols in the output symbol table.
356 do_output_local_symbol_count() const
357 { gold_unreachable(); }
359 // Return the file offset for local symbols in the output symbol table.
361 do_local_symbol_offset() const
362 { gold_unreachable(); }
366 do_read_relocs(Read_relocs_data
*)
367 { gold_unreachable(); }
369 // Process the relocs to find list of referenced sections. Used only
370 // during garbage collection.
372 do_gc_process_relocs(Symbol_table
*, Layout
*, Read_relocs_data
*)
373 { gold_unreachable(); }
375 // Scan the relocs and adjust the symbol table.
377 do_scan_relocs(Symbol_table
*, Layout
*, Read_relocs_data
*)
378 { gold_unreachable(); }
380 // Count the local symbols.
382 do_count_local_symbols(Stringpool_template
<char>*,
383 Stringpool_template
<char>*)
384 { gold_unreachable(); }
386 // Finalize the local symbols.
388 do_finalize_local_symbols(unsigned int, off_t
, Symbol_table
*)
389 { gold_unreachable(); }
391 // Set the offset where local dynamic symbol information will be stored.
393 do_set_local_dynsym_indexes(unsigned int)
394 { gold_unreachable(); }
396 // Set the offset where local dynamic symbol information will be stored.
398 do_set_local_dynsym_offset(off_t
)
399 { gold_unreachable(); }
401 // Relocate the input sections and write out the local symbols.
403 do_relocate(const Symbol_table
*, const Layout
*, Output_file
*)
404 { gold_unreachable(); }
407 // General access to the ELF file.
408 elfcpp::Elf_file
<size
, big_endian
, Object
> elf_file_
;
412 // This class is responsible for collecting the debug index information
413 // and writing the .dwp file in ELF format.
415 class Dwp_output_file
418 Dwp_output_file(const char* name
)
419 : name_(name
), machine_(0), size_(0), big_endian_(false), osabi_(0),
420 abiversion_(0), fd_(NULL
), next_file_offset_(0), shnum_(1), sections_(),
421 shoff_(0), shstrndx_(0), have_strings_(false), stringpool_(),
422 shstrtab_(), cu_index_(), tu_index_(), last_type_sig_(0),
425 this->stringpool_
.set_no_zero_null();
428 // Record the target info from an input file.
430 record_target_info(const char* name
, int machine
, int size
, bool big_endian
,
431 int osabi
, int abiversion
);
433 // Add a string to the debug strings section.
435 add_string(const char* str
, size_t len
);
437 // Add a section to the output file, and return the new section index.
439 add_section(const char* section_name
, const unsigned char* contents
,
440 section_size_type len
, int align
);
442 // Add a set of .debug_info and related sections to the output file.
444 add_cu_set(uint64_t dwo_id
, unsigned int debug_info
,
445 unsigned int debug_abbrev
, unsigned int debug_line
,
446 unsigned int debug_loc
, unsigned int debug_str_offsets
,
447 unsigned int debug_macinfo
, unsigned int debug_macro
);
449 // Lookup a type signature and return TRUE if we have already seen it.
451 lookup_tu(uint64_t type_sig
);
453 // Add a set of .debug_types and related sections to the output file.
455 add_tu_set(uint64_t type_sig
, unsigned int debug_types
,
456 unsigned int debug_abbrev
, unsigned int debug_line
,
457 unsigned int debug_str_offsets
);
459 // Finalize the file, write the string tables and index sections,
460 // and close the file.
465 // Sections in the output file.
470 section_size_type size
;
474 // A set of sections for a compilation unit or type unit.
478 unsigned int debug_info_or_types
;
479 unsigned int debug_abbrev
;
480 unsigned int debug_line
;
481 unsigned int debug_loc
;
482 unsigned int debug_str_offsets
;
483 unsigned int debug_macinfo
;
484 unsigned int debug_macro
;
487 // The index sections defined by the DWARF Package File Format spec.
491 // Vector for the section index pool.
492 typedef std::vector
<unsigned int> Shndx_pool
;
495 : capacity_(0), used_(0), hash_table_(NULL
), shndx_pool_()
501 // Find a slot in the hash table for SIGNATURE. Return TRUE
502 // if the entry already exists.
504 find_or_add(uint64_t signature
, unsigned int* slotp
);
506 // Enter a CU or TU set at the given SLOT in the hash table.
508 enter_set(unsigned int slot
, const Cu_or_tu_set
& set
);
510 // Return the contents of the given SLOT in the hash table of signatures.
512 hash_table(unsigned int slot
) const
513 { return this->hash_table_
[slot
]; }
515 // Return the contents of the given SLOT in the parallel table of
516 // shndx pool indexes.
518 index_table(unsigned int slot
) const
519 { return this->index_table_
[slot
]; }
521 // Return the total number of slots in the hash table.
523 hash_table_total_slots() const
524 { return this->capacity_
; }
526 // Return the number of used slots in the hash table.
528 hash_table_used_slots() const
529 { return this->used_
; }
531 // Return an iterator into the shndx pool.
532 Shndx_pool::const_iterator
534 { return this->shndx_pool_
.begin(); }
536 Shndx_pool::const_iterator
537 shndx_pool_end() const
538 { return this->shndx_pool_
.end(); }
540 // Return the number of entries in the shndx pool.
542 shndx_pool_size() const
543 { return this->shndx_pool_
.size(); }
546 // Initialize the hash table.
550 // Grow the hash table when we reach 2/3 capacity.
554 // The number of slots in the table, a power of 2 such that
555 // capacity > 3 * size / 2.
556 unsigned int capacity_
;
557 // The current number of used slots in the hash table.
559 // The storage for the hash table of signatures.
560 uint64_t* hash_table_
;
561 // The storage for the parallel table of shndx pool indexes.
562 uint32_t* index_table_
;
563 // The pool of section indexes.
564 Shndx_pool shndx_pool_
;
565 }; // End class Dwp_output_file::Dwp_index.
567 // Initialize the output file.
571 // Write the ELF header.
575 template<unsigned int size
, bool big_endian
>
579 // Write a section header.
581 write_shdr(const char* name
, unsigned int type
, unsigned int flags
,
582 uint64_t addr
, off_t offset
, section_size_type sect_size
,
583 unsigned int link
, unsigned int info
,
584 unsigned int align
, unsigned int ent_size
);
586 template<unsigned int size
, bool big_endian
>
588 sized_write_shdr(const char* name
, unsigned int type
, unsigned int flags
,
589 uint64_t addr
, off_t offset
, section_size_type sect_size
,
590 unsigned int link
, unsigned int info
,
591 unsigned int align
, unsigned int ent_size
);
593 // Write a CU or TU index section.
594 template<bool big_endian
>
596 write_index(const char* sect_name
, const Dwp_index
& index
);
598 // The output filename.
600 // ELF header parameters.
606 // The output file descriptor.
608 // Next available file offset.
609 off_t next_file_offset_
;
610 // The number of sections.
612 // Section table. The first entry is shndx 1.
613 std::vector
<Section
> sections_
;
614 // File offset of the section header table.
616 // Section index of the section string table.
617 unsigned int shstrndx_
;
618 // TRUE if we have added any strings to the string pool.
620 // String pool for the output .debug_str.dwo section.
621 Stringpool stringpool_
;
622 // String pool for the .shstrtab section.
623 Stringpool shstrtab_
;
624 // The compilation unit index.
626 // The type unit index.
628 // Cache of the last type signature looked up.
629 uint64_t last_type_sig_
;
630 // Cache of the slot index for the last type signature.
631 unsigned int last_tu_slot_
;
634 // A specialization of Dwarf_info_reader, for reading dwo_ids and
635 // type signatures from DWARF CUs and TUs.
637 class Dwo_id_info_reader
: public Dwarf_info_reader
640 Dwo_id_info_reader(bool is_type_unit
,
642 const unsigned char* symbols
,
645 unsigned int reloc_shndx
,
646 unsigned int reloc_type
)
647 : Dwarf_info_reader(is_type_unit
, object
, symbols
, symbols_size
, shndx
,
648 reloc_shndx
, reloc_type
),
649 dwo_id_found_(false), dwo_id_(0), type_sig_found_(false), type_sig_(0)
652 ~Dwo_id_info_reader()
655 // Return the dwo_id from a DWARF compilation unit DIE in *DWO_ID.
657 get_dwo_id(uint64_t* dwo_id
)
660 if (!this->dwo_id_found_
)
662 *dwo_id
= this->dwo_id_
;
666 // Return the type signature from a DWARF type unit DIE in *TYPE_SIG.
668 get_type_sig(uint64_t* type_sig
)
671 if (!this->type_sig_found_
)
673 *type_sig
= this->type_sig_
;
678 // Visit a compilation unit.
680 visit_compilation_unit(off_t cu_offset
, off_t cu_length
, Dwarf_die
*);
682 // Visit a type unit.
684 visit_type_unit(off_t tu_offset
, off_t type_offset
, uint64_t signature
,
688 // Visit a top-level DIE.
690 visit_top_die(Dwarf_die
* die
);
692 // TRUE if we found a dwo_id.
696 // TRUE if we found a type signature.
697 bool type_sig_found_
;
698 // The type signature.
702 // Class Sized_relobj_dwo.
704 // Setup the section information.
706 template <int size
, bool big_endian
>
708 Sized_relobj_dwo
<size
, big_endian
>::setup()
710 const unsigned int shnum
= this->elf_file_
.shnum();
711 this->set_shnum(shnum
);
712 this->section_offsets().resize(shnum
);
715 // Return a view of the contents of a section.
717 template <int size
, bool big_endian
>
719 Sized_relobj_dwo
<size
, big_endian
>::do_section_contents(
721 section_size_type
* plen
,
724 Object::Location
loc(this->elf_file_
.section_contents(shndx
));
725 *plen
= convert_to_section_size_type(loc
.data_size
);
728 static const unsigned char empty
[1] = { '\0' };
731 return this->get_view(loc
.file_offset
, *plen
, true, cache
);
734 // Return a view of the uncompressed contents of a section. Set *PLEN
735 // to the size. Set *IS_NEW to true if the contents need to be deleted
738 template <int size
, bool big_endian
>
740 Sized_relobj_dwo
<size
, big_endian
>::do_decompressed_section_contents(
742 section_size_type
* plen
,
745 section_size_type buffer_size
;
746 const unsigned char* buffer
= this->do_section_contents(shndx
, &buffer_size
,
749 std::string sect_name
= this->do_section_name(shndx
);
750 if (!is_prefix_of(".zdebug_", sect_name
.c_str()))
757 section_size_type uncompressed_size
= get_uncompressed_size(buffer
,
759 unsigned char* uncompressed_data
= new unsigned char[uncompressed_size
];
760 if (!decompress_input_section(buffer
,
764 this->error(_("could not decompress section %s"),
765 this->section_name(shndx
).c_str());
766 *plen
= uncompressed_size
;
768 return uncompressed_data
;
773 Dwo_file::~Dwo_file()
775 if (this->input_file_
!= NULL
)
776 delete this->input_file_
;
777 if (this->obj_
!= NULL
)
781 // Read the input file and send its contents to OUTPUT_FILE.
784 Dwo_file::read(Dwp_output_file
* output_file
)
786 // Open the input file.
787 this->input_file_
= new Input_file(this->name_
);
790 if (!this->input_file_
->open(dirpath
, NULL
, &index
))
791 gold_fatal(_("%s: can't open"), this->name_
);
793 // Check that it's an ELF file.
794 off_t filesize
= this->input_file_
->file().filesize();
795 int hdrsize
= elfcpp::Elf_recognizer::max_header_size
;
796 if (filesize
< hdrsize
)
798 const unsigned char* p
=
799 this->input_file_
->file().get_view(0, 0, hdrsize
, true, false);
800 if (!elfcpp::Elf_recognizer::is_elf_file(p
, hdrsize
))
801 gold_fatal(_("%s: not an ELF object file"), this->name_
);
803 // Get the size, endianness, machine, etc. info from the header,
804 // make an appropriately-sized Relobj, and pass the target info
805 // to the output object.
809 if (!elfcpp::Elf_recognizer::is_valid_header(p
, hdrsize
, &size
,
810 &big_endian
, &error
))
811 gold_fatal(_("%s: %s"), this->name_
, error
.c_str());
813 this->obj_
= this->make_object(size
, big_endian
, p
, this->input_file_
,
816 unsigned int shnum
= this->shnum();
817 this->is_compressed_
.resize(shnum
);
818 this->shndx_map_
.resize(shnum
);
820 typedef std::vector
<unsigned int> Types_list
;
821 Types_list debug_types
;
822 unsigned int debug_info
= 0;
823 unsigned int debug_abbrev
= 0;
824 unsigned int debug_line
= 0;
825 unsigned int debug_loc
= 0;
826 unsigned int debug_str
= 0;
827 unsigned int debug_str_offsets
= 0;
828 unsigned int debug_macinfo
= 0;
829 unsigned int debug_macro
= 0;
830 unsigned int debug_cu_index
= 0;
831 unsigned int debug_tu_index
= 0;
833 // Scan the section table and look for .dwp index sections.
834 // (Section index 0 is a dummy section; skip it.)
835 for (unsigned int i
= 1; i
< shnum
; i
++)
837 if (this->section_type(i
) != elfcpp::SHT_PROGBITS
)
839 std::string sect_name
= this->section_name(i
);
840 const char* suffix
= sect_name
.c_str();
841 if (is_prefix_of(".debug_", suffix
))
843 else if (is_prefix_of(".zdebug_", suffix
))
845 this->is_compressed_
[i
] = true;
850 if (strcmp(suffix
, "cu_index") == 0)
852 else if (strcmp(suffix
, "tu_index") == 0)
854 else if (strcmp(suffix
, "str.dwo") == 0)
858 // Merge the input string table into the output string table.
859 this->add_strings(output_file
, debug_str
);
861 // If we found any .dwp index sections, read those and add the section
862 // sets to the output file.
863 if (debug_cu_index
> 0 || debug_tu_index
> 0)
865 if (debug_cu_index
> 0)
866 this->read_compunit_index(debug_cu_index
, output_file
);
867 if (debug_tu_index
> 0)
868 this->read_typeunit_index(debug_tu_index
, output_file
);
872 // If we found no index sections, this is a .dwo file.
873 // Scan the section table and collect the debug sections.
874 for (unsigned int i
= 1; i
< shnum
; i
++)
876 if (this->section_type(i
) != elfcpp::SHT_PROGBITS
)
878 std::string sect_name
= this->section_name(i
);
879 const char* suffix
= sect_name
.c_str();
880 if (is_prefix_of(".debug_", suffix
))
882 else if (is_prefix_of(".zdebug_", suffix
))
886 // TODO: Check for one of each section (except .debug_types).
887 if (strcmp(suffix
, "info.dwo") == 0)
889 else if (strcmp(suffix
, "types.dwo") == 0)
890 debug_types
.push_back(i
);
891 else if (strcmp(suffix
, "abbrev.dwo") == 0)
893 else if (strcmp(suffix
, "line.dwo") == 0)
895 else if (strcmp(suffix
, "loc.dwo") == 0)
897 else if (strcmp(suffix
, "str_offsets.dwo") == 0)
898 debug_str_offsets
= i
;
899 else if (strcmp(suffix
, "macinfo.dwo") == 0)
901 else if (strcmp(suffix
, "macro.dwo") == 0)
907 // Extract the dwo_id from .debug_info.dwo section.
909 Dwo_id_info_reader
dwarf_reader(false, this->obj_
, NULL
, 0, debug_info
,
911 dwarf_reader
.set_abbrev_shndx(debug_abbrev
);
912 if (!dwarf_reader
.get_dwo_id(&dwo_id
))
913 gold_fatal(_("%s: .debug_info.dwo section does not have DW_AT_GNU_dwo_id "
914 "attribute"), this->name_
);
915 this->add_cu_set(output_file
, dwo_id
, debug_info
, debug_abbrev
,
916 debug_line
, debug_loc
, debug_str_offsets
,
917 debug_macinfo
, debug_macro
);
920 for (Types_list::const_iterator tp
= debug_types
.begin();
921 tp
!= debug_types
.end();
924 // Extract the type signature from .debug_types.dwo section.
926 gold_assert(*tp
> 0);
927 Dwo_id_info_reader
dwarf_reader(true, this->obj_
, NULL
, 0, *tp
, 0, 0);
928 dwarf_reader
.set_abbrev_shndx(debug_abbrev
);
929 if (!dwarf_reader
.get_type_sig(&type_sig
))
930 gold_fatal(_("%s: .debug_types.dwo section does not have type signature"),
932 this->add_tu_set(output_file
, type_sig
, *tp
, debug_abbrev
, debug_line
,
937 // Create a Sized_relobj_dwo of the given size and endianness,
938 // and record the target info. P is a pointer to the ELF header
942 Dwo_file::make_object(int size
, bool big_endian
, const unsigned char* p
,
943 Input_file
* input_file
, Dwp_output_file
* output_file
)
948 #ifdef HAVE_TARGET_32_BIG
949 return this->sized_make_object
<32, true>(p
, input_file
, output_file
);
954 #ifdef HAVE_TARGET_32_LITTLE
955 return this->sized_make_object
<32, false>(p
, input_file
, output_file
);
963 #ifdef HAVE_TARGET_64_BIG
964 return this->sized_make_object
<64, true>(p
, input_file
, output_file
);
969 #ifdef HAVE_TARGET_64_LITTLE
970 return this->sized_make_object
<64, false>(p
, input_file
, output_file
);
979 // Function template to create a Sized_relobj_dwo and record the target info.
980 // P is a pointer to the ELF header in memory.
982 template <int size
, bool big_endian
>
984 Dwo_file::sized_make_object(const unsigned char* p
, Input_file
* input_file
,
985 Dwp_output_file
* output_file
)
987 elfcpp::Ehdr
<size
, big_endian
> ehdr(p
);
988 Sized_relobj_dwo
<size
, big_endian
>* obj
=
989 new Sized_relobj_dwo
<size
, big_endian
>(this->name_
, input_file
, ehdr
);
991 output_file
->record_target_info(
992 this->name_
, ehdr
.get_e_machine(), size
, big_endian
,
993 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
994 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
998 // Read the .debug_cu_index section of a .dwp file,
999 // and process the CU sets.
1002 Dwo_file::read_compunit_index(unsigned int shndx
, Dwp_output_file
* output_file
)
1004 if (this->obj_
->is_big_endian())
1005 this->sized_read_compunit_index
<true>(shndx
, output_file
);
1007 this->sized_read_compunit_index
<false>(shndx
, output_file
);
1010 template <bool big_endian
>
1012 Dwo_file::sized_read_compunit_index(unsigned int shndx
,
1013 Dwp_output_file
* output_file
)
1015 section_size_type len
;
1017 const unsigned char* contents
= this->section_contents(shndx
, &len
, &is_new
);
1019 unsigned int version
=
1020 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
);
1022 gold_fatal(_("%s: .debug_cu_index has unsupported version number %d"),
1023 this->name_
, version
);
1025 unsigned int nused
=
1026 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1027 + 2 * sizeof(uint32_t));
1031 unsigned int nslots
=
1032 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1033 + 3 * sizeof(uint32_t));
1035 const unsigned char* phash
= contents
+ 4 * sizeof(uint32_t);
1036 const unsigned char* pindex
= phash
+ nslots
* sizeof(uint64_t);
1037 const unsigned char* shndx_pool
= pindex
+ nslots
* sizeof(uint32_t);
1038 const unsigned char* limit
= contents
+ len
;
1040 if (shndx_pool
>= limit
)
1041 gold_fatal(_("%s: .debug_cu_index is corrupt"), this->name_
);
1043 // Loop over the slots of the hash table.
1044 for (unsigned int i
= 0; i
< nslots
; ++i
)
1047 elfcpp::Swap_unaligned
<64, big_endian
>::readval(phash
);
1050 unsigned int index
=
1051 elfcpp::Swap_unaligned
<32, big_endian
>::readval(pindex
);
1052 const unsigned char* shndx_list
=
1053 shndx_pool
+ index
* sizeof(uint32_t);
1055 // Collect the debug sections for this compilation unit set.
1056 unsigned int debug_info
= 0;
1057 unsigned int debug_abbrev
= 0;
1058 unsigned int debug_line
= 0;
1059 unsigned int debug_loc
= 0;
1060 unsigned int debug_str_offsets
= 0;
1061 unsigned int debug_macinfo
= 0;
1062 unsigned int debug_macro
= 0;
1065 if (shndx_list
>= limit
)
1066 gold_fatal(_("%s: .debug_cu_index is corrupt"),
1068 unsigned int shndx
=
1069 elfcpp::Swap_unaligned
<32, big_endian
>::readval(shndx_list
);
1072 if (shndx
> this->shnum())
1073 gold_fatal(_("%s: .debug_cu_index has bad shndx"),
1075 std::string sect_name
= this->section_name(shndx
);
1076 const char* suffix
= sect_name
.c_str();
1077 if (is_prefix_of(".debug_", suffix
))
1079 else if (is_prefix_of(".zdebug_", suffix
))
1082 gold_fatal(_("%s: .debug_cu_index refers to "
1083 "non-debug section"), this->name_
);
1084 if (strcmp(suffix
, "info.dwo") == 0)
1086 else if (strcmp(suffix
, "abbrev.dwo") == 0)
1087 debug_abbrev
= shndx
;
1088 else if (strcmp(suffix
, "line.dwo") == 0)
1090 else if (strcmp(suffix
, "loc.dwo") == 0)
1092 else if (strcmp(suffix
, "str_offsets.dwo") == 0)
1093 debug_str_offsets
= shndx
;
1094 else if (strcmp(suffix
, "macinfo.dwo") == 0)
1095 debug_macinfo
= shndx
;
1096 else if (strcmp(suffix
, "macro.dwo") == 0)
1097 debug_macro
= shndx
;
1098 shndx_list
+= sizeof(uint32_t);
1100 this->add_cu_set(output_file
, dwo_id
, debug_info
, debug_abbrev
,
1101 debug_line
, debug_loc
, debug_str_offsets
,
1102 debug_macinfo
, debug_macro
);
1104 phash
+= sizeof(uint64_t);
1105 pindex
+= sizeof(uint32_t);
1112 // Read the .debug_tu_index section of a .dwp file,
1113 // and process the TU sets.
1116 Dwo_file::read_typeunit_index(unsigned int shndx
, Dwp_output_file
* output_file
)
1118 if (this->obj_
->is_big_endian())
1119 this->sized_read_typeunit_index
<true>(shndx
, output_file
);
1121 this->sized_read_typeunit_index
<false>(shndx
, output_file
);
1124 template <bool big_endian
>
1126 Dwo_file::sized_read_typeunit_index(unsigned int shndx
,
1127 Dwp_output_file
* output_file
)
1129 section_size_type len
;
1131 const unsigned char* contents
= this->section_contents(shndx
, &len
, &is_new
);
1133 unsigned int version
=
1134 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
);
1136 gold_fatal(_("%s: .debug_tu_index has unsupported version number %d"),
1137 this->name_
, version
);
1139 unsigned int nused
=
1140 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1141 + 2 * sizeof(uint32_t));
1145 unsigned int nslots
=
1146 elfcpp::Swap_unaligned
<32, big_endian
>::readval(contents
1147 + 3 * sizeof(uint32_t));
1149 const unsigned char* phash
= contents
+ 4 * sizeof(uint32_t);
1150 const unsigned char* pindex
= phash
+ nslots
* sizeof(uint64_t);
1151 const unsigned char* shndx_pool
= pindex
+ nslots
* sizeof(uint32_t);
1152 const unsigned char* limit
= contents
+ len
;
1154 if (shndx_pool
>= limit
)
1155 gold_fatal(_("%s: .debug_tu_index is corrupt"), this->name_
);
1157 // Loop over the slots of the hash table.
1158 for (unsigned int i
= 0; i
< nslots
; ++i
)
1161 elfcpp::Swap_unaligned
<64, big_endian
>::readval(phash
);
1164 unsigned int index
=
1165 elfcpp::Swap_unaligned
<32, big_endian
>::readval(pindex
);
1166 const unsigned char* shndx_list
=
1167 shndx_pool
+ index
* sizeof(uint32_t);
1169 // Collect the debug sections for this type unit set.
1170 unsigned int debug_types
= 0;
1171 unsigned int debug_abbrev
= 0;
1172 unsigned int debug_line
= 0;
1173 unsigned int debug_str_offsets
= 0;
1176 if (shndx_list
>= limit
)
1177 gold_fatal(_("%s: .debug_tu_index is corrupt"),
1179 unsigned int shndx
=
1180 elfcpp::Swap_unaligned
<32, big_endian
>::readval(shndx_list
);
1183 if (shndx
> this->shnum())
1184 gold_fatal(_("%s: .debug_tu_index has bad shndx"),
1186 std::string sect_name
= this->section_name(shndx
);
1187 const char* suffix
= sect_name
.c_str();
1188 if (is_prefix_of(".debug_", suffix
))
1190 else if (is_prefix_of(".zdebug_", suffix
))
1193 gold_fatal(_("%s: .debug_tu_index refers to "
1194 "non-debug section"), this->name_
);
1195 if (strcmp(suffix
, "types.dwo") == 0)
1196 debug_types
= shndx
;
1197 else if (strcmp(suffix
, "abbrev.dwo") == 0)
1198 debug_abbrev
= shndx
;
1199 else if (strcmp(suffix
, "line.dwo") == 0)
1201 else if (strcmp(suffix
, "str_offsets.dwo") == 0)
1202 debug_str_offsets
= shndx
;
1203 shndx_list
+= sizeof(uint32_t);
1205 this->add_tu_set(output_file
, type_sig
, debug_types
, debug_abbrev
,
1206 debug_line
, debug_str_offsets
);
1208 phash
+= sizeof(uint64_t);
1209 pindex
+= sizeof(uint32_t);
1216 // Merge the input string table section into the output file.
1219 Dwo_file::add_strings(Dwp_output_file
* output_file
, unsigned int debug_str
)
1221 section_size_type len
;
1223 const unsigned char* pdata
= this->section_contents(debug_str
, &len
, &is_new
);
1224 const char* p
= reinterpret_cast<const char*>(pdata
);
1225 const char* pend
= p
+ len
;
1227 // Check that the last string is null terminated.
1228 if (pend
[-1] != '\0')
1229 gold_fatal(_("%s: last entry in string section '%s' "
1230 "is not null terminated"),
1232 this->section_name(debug_str
).c_str());
1234 // Count the number of strings in the section, and size the map.
1236 for (const char* pt
= p
; pt
< pend
; pt
+= strlen(pt
) + 1)
1238 this->str_offset_map_
.reserve(count
+ 1);
1240 // Add the strings to the output string table, and record the new offsets
1242 section_offset_type i
= 0;
1243 section_offset_type new_offset
;
1246 size_t len
= strlen(p
);
1247 new_offset
= output_file
->add_string(p
, len
);
1248 this->str_offset_map_
.push_back(std::make_pair(i
, new_offset
));
1253 this->str_offset_map_
.push_back(std::make_pair(i
, new_offset
));
1258 // Copy a section from the input file to the output file.
1259 // If IS_STR_OFFSETS is true, remap the string offsets for the
1260 // output string table.
1263 Dwo_file::copy_section(Dwp_output_file
* output_file
, unsigned int shndx
,
1264 const char* section_name
, bool is_str_offsets
)
1266 // Some sections may be referenced from more than one set.
1267 // Don't copy a section more than once.
1268 if (this->shndx_map_
[shndx
] > 0)
1269 return this->shndx_map_
[shndx
];
1271 section_size_type len
;
1273 const unsigned char* contents
= this->section_contents(shndx
, &len
, &is_new
);
1277 const unsigned char* remapped
= this->remap_str_offsets(contents
, len
);
1280 contents
= remapped
;
1284 this->shndx_map_
[shndx
] = output_file
->add_section(section_name
, contents
,
1289 return this->shndx_map_
[shndx
];
1293 const unsigned char*
1294 Dwo_file::remap_str_offsets(const unsigned char* contents
,
1295 section_size_type len
)
1298 gold_fatal(_("%s: .debug_str_offsets.dwo section size not a multiple of 4"),
1301 if (this->obj_
->is_big_endian())
1302 return this->sized_remap_str_offsets
<true>(contents
, len
);
1304 return this->sized_remap_str_offsets
<false>(contents
, len
);
1307 template <bool big_endian
>
1308 const unsigned char*
1309 Dwo_file::sized_remap_str_offsets(const unsigned char* contents
,
1310 section_size_type len
)
1312 unsigned char* remapped
= new unsigned char[len
];
1313 const unsigned char* p
= contents
;
1314 unsigned char* q
= remapped
;
1317 unsigned int val
= elfcpp::Swap_unaligned
<32, big_endian
>::readval(p
);
1318 val
= this->remap_str_offset(val
);
1319 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(q
, val
);
1328 Dwo_file::remap_str_offset(section_offset_type val
)
1330 Str_offset_map_entry entry
;
1333 Str_offset_map::const_iterator p
=
1334 std::lower_bound(this->str_offset_map_
.begin(),
1335 this->str_offset_map_
.end(),
1336 entry
, Offset_compare());
1338 if (p
== this->str_offset_map_
.end() || p
->first
> val
)
1340 if (p
== this->str_offset_map_
.begin())
1343 gold_assert(p
->first
<= val
);
1346 return p
->second
+ (val
- p
->first
);
1349 // Add a set of .debug_info and related sections to OUTPUT_FILE.
1352 Dwo_file::add_cu_set(Dwp_output_file
* output_file
,
1354 unsigned int debug_info
,
1355 unsigned int debug_abbrev
,
1356 unsigned int debug_line
,
1357 unsigned int debug_loc
,
1358 unsigned int debug_str_offsets
,
1359 unsigned int debug_macinfo
,
1360 unsigned int debug_macro
)
1362 if (debug_info
== 0)
1363 gold_fatal(_("%s: no .debug_info.dwo section found"), this->name_
);
1364 if (debug_abbrev
== 0)
1365 gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_
);
1367 debug_abbrev
= this->copy_section(output_file
, debug_abbrev
,
1368 ".debug_abbrev.dwo", false);
1370 debug_line
= this->copy_section(output_file
, debug_line
,
1371 ".debug_line.dwo", false);
1373 debug_loc
= this->copy_section(output_file
, debug_loc
, ".debug_loc.dwo",
1375 if (debug_macinfo
> 0)
1376 debug_macinfo
= this->copy_section(output_file
, debug_macinfo
,
1377 ".debug_macinfo.dwo", false);
1378 if (debug_macro
> 0)
1379 debug_macro
= this->copy_section(output_file
, debug_macro
,
1380 ".debug_macro.dwo", false);
1382 if (debug_str_offsets
> 0)
1383 debug_str_offsets
= this->copy_section(output_file
, debug_str_offsets
,
1384 ".debug_str_offsets.dwo", true);
1386 debug_info
= this->copy_section(output_file
, debug_info
, ".debug_info.dwo",
1389 output_file
->add_cu_set(dwo_id
, debug_info
, debug_abbrev
, debug_line
,
1390 debug_loc
, debug_str_offsets
, debug_macinfo
,
1394 // Add a set of .debug_types and related sections to OUTPUT_FILE.
1397 Dwo_file::add_tu_set(Dwp_output_file
* output_file
,
1399 unsigned int debug_types
,
1400 unsigned int debug_abbrev
,
1401 unsigned int debug_line
,
1402 unsigned int debug_str_offsets
)
1404 if (debug_types
== 0)
1405 gold_fatal(_("%s: no .debug_types.dwo section found"), this->name_
);
1406 if (debug_abbrev
== 0)
1407 gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_
);
1409 // Ignore duplicate type signatures.
1410 if (output_file
->lookup_tu(type_sig
))
1413 debug_abbrev
= this->copy_section(output_file
, debug_abbrev
,
1414 ".debug_abbrev.dwo", false);
1416 debug_line
= this->copy_section(output_file
, debug_line
,
1417 ".debug_line.dwo", false);
1419 if (debug_str_offsets
> 0)
1420 debug_str_offsets
= this->copy_section(output_file
, debug_str_offsets
,
1421 ".debug_str_offsets.dwo", true);
1423 debug_types
= this->copy_section(output_file
, debug_types
,
1424 ".debug_types.dwo", false);
1426 output_file
->add_tu_set(type_sig
, debug_types
, debug_abbrev
, debug_line
,
1430 // Class Dwp_output_file.
1432 // Record the target info from an input file. On first call, we
1433 // set the ELF header values for the output file. On subsequent
1434 // calls, we just verify that the values match.
1437 Dwp_output_file::record_target_info(const char*, int machine
,
1438 int size
, bool big_endian
,
1439 int osabi
, int abiversion
)
1441 // TODO: Check the values on subsequent calls.
1442 if (this->size_
> 0)
1445 this->machine_
= machine
;
1447 this->big_endian_
= big_endian
;
1448 this->osabi_
= osabi
;
1449 this->abiversion_
= abiversion
;
1452 this->next_file_offset_
= elfcpp::Elf_sizes
<32>::ehdr_size
;
1453 else if (size
== 64)
1454 this->next_file_offset_
= elfcpp::Elf_sizes
<64>::ehdr_size
;
1458 this->fd_
= ::fopen(this->name_
, "wb");
1459 if (this->fd_
== NULL
)
1460 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1462 // Write zeroes for the ELF header initially. We'll write
1463 // the actual header during finalize().
1464 static const char buf
[elfcpp::Elf_sizes
<64>::ehdr_size
] = { 0 };
1465 if (::fwrite(buf
, 1, this->next_file_offset_
, this->fd_
)
1466 < (size_t) this->next_file_offset_
)
1467 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1470 // Add a string to the debug strings section.
1473 Dwp_output_file::add_string(const char* str
, size_t len
)
1475 Stringpool::Key key
;
1476 this->stringpool_
.add_with_length(str
, len
, true, &key
);
1477 this->have_strings_
= true;
1478 // We aren't supposed to call get_offset() until after
1479 // calling set_string_offsets(), but the offsets will
1480 // not change unless optimizing the string pool.
1481 return this->stringpool_
.get_offset_from_key(key
);
1484 // Align the file offset to the given boundary.
1487 align_offset(off_t off
, int align
)
1489 return (off
+ align
- 1) & ~(align
- 1);
1492 // Add a section to the output file, and return the new section index.
1495 Dwp_output_file::add_section(const char* section_name
,
1496 const unsigned char* contents
,
1497 section_size_type len
,
1500 off_t file_offset
= this->next_file_offset_
;
1501 gold_assert(this->size_
> 0 && file_offset
> 0);
1503 file_offset
= align_offset(file_offset
, align
);
1505 ::fseek(this->fd_
, file_offset
, SEEK_SET
);
1506 if (::fwrite(contents
, 1, len
, this->fd_
) < len
)
1507 gold_fatal(_("%s: error writing section '%s'"), this->name_
, section_name
);
1509 section_name
= this->shstrtab_
.add_with_length(section_name
,
1510 strlen(section_name
),
1512 Section sect
= { section_name
, file_offset
, len
, align
};
1513 this->sections_
.push_back(sect
);
1515 this->next_file_offset_
= file_offset
+ len
;
1516 return this->shnum_
++;
1519 // Add a set of .debug_info and related sections to the output file.
1522 Dwp_output_file::add_cu_set(uint64_t dwo_id
,
1523 unsigned int debug_info
,
1524 unsigned int debug_abbrev
,
1525 unsigned int debug_line
,
1526 unsigned int debug_loc
,
1527 unsigned int debug_str_offsets
,
1528 unsigned int debug_macinfo
,
1529 unsigned int debug_macro
)
1531 Cu_or_tu_set cu_set
= { dwo_id
, debug_info
, debug_abbrev
, debug_line
,
1532 debug_loc
, debug_str_offsets
, debug_macinfo
,
1535 if (!this->cu_index_
.find_or_add(dwo_id
, &slot
))
1536 this->cu_index_
.enter_set(slot
, cu_set
);
1538 gold_warning(_("%s: duplicate entry for CU (dwo_id 0x%llx)"),
1539 this->name_
, (unsigned long long)dwo_id
);
1542 // Lookup a type signature and return TRUE if we have already seen it.
1544 Dwp_output_file::lookup_tu(uint64_t type_sig
)
1546 this->last_type_sig_
= type_sig
;
1547 return this->tu_index_
.find_or_add(type_sig
, &this->last_tu_slot_
);
1550 // Add a set of .debug_types and related sections to the output file.
1553 Dwp_output_file::add_tu_set(uint64_t type_sig
,
1554 unsigned int debug_types
,
1555 unsigned int debug_abbrev
,
1556 unsigned int debug_line
,
1557 unsigned int debug_str_offsets
)
1559 Cu_or_tu_set tu_set
= { type_sig
, debug_types
, debug_abbrev
, debug_line
,
1560 0, debug_str_offsets
, 0, 0 };
1562 if (type_sig
== this->last_type_sig_
)
1563 slot
= this->last_tu_slot_
;
1565 this->tu_index_
.find_or_add(type_sig
, &slot
);
1566 this->tu_index_
.enter_set(slot
, tu_set
);
1569 // Find a slot in the hash table for SIGNATURE. Return TRUE
1570 // if the entry already exists.
1573 Dwp_output_file::Dwp_index::find_or_add(uint64_t signature
,
1574 unsigned int* slotp
)
1576 if (this->capacity_
== 0)
1579 static_cast<unsigned int>(signature
) & (this->capacity_
- 1);
1580 unsigned int secondary_hash
;
1581 uint64_t probe
= this->hash_table_
[slot
];
1582 if (probe
!= 0 && probe
!= signature
)
1584 secondary_hash
= (static_cast<unsigned int>(signature
>> 32)
1585 & (this->capacity_
- 1)) | 1;
1588 slot
= (slot
+ secondary_hash
) & (this->capacity_
- 1);
1589 probe
= this->hash_table_
[slot
];
1590 } while (probe
!= 0 && probe
!= signature
);
1593 return (probe
!= 0);
1596 // Enter a CU or TU set at the given SLOT in the hash table.
1599 Dwp_output_file::Dwp_index::enter_set(unsigned int slot
,
1600 const Cu_or_tu_set
& set
)
1602 gold_assert(slot
< this->capacity_
);
1603 gold_assert(set
.debug_info_or_types
> 0);
1604 gold_assert(set
.debug_abbrev
> 0);
1606 // Add the section indexes to the pool.
1607 uint32_t pool_index
= this->shndx_pool_
.size();
1608 this->shndx_pool_
.push_back(set
.debug_info_or_types
);
1609 this->shndx_pool_
.push_back(set
.debug_abbrev
);
1610 if (set
.debug_line
> 0)
1611 this->shndx_pool_
.push_back(set
.debug_line
);
1612 if (set
.debug_loc
> 0)
1613 this->shndx_pool_
.push_back(set
.debug_loc
);
1614 if (set
.debug_str_offsets
> 0)
1615 this->shndx_pool_
.push_back(set
.debug_str_offsets
);
1616 if (set
.debug_macinfo
> 0)
1617 this->shndx_pool_
.push_back(set
.debug_macinfo
);
1618 if (set
.debug_macro
> 0)
1619 this->shndx_pool_
.push_back(set
.debug_macro
);
1620 this->shndx_pool_
.push_back(0);
1622 // Enter the signature and pool index into the hash table.
1623 gold_assert(this->hash_table_
[slot
] == 0);
1624 this->hash_table_
[slot
] = set
.signature
;
1625 this->index_table_
[slot
] = pool_index
;
1628 // Grow the hash table when we exceed 2/3 capacity.
1629 if (this->used_
* 3 > this->capacity_
* 2)
1633 // Initialize the hash table.
1636 Dwp_output_file::Dwp_index::initialize()
1638 this->capacity_
= 16;
1639 this->hash_table_
= new uint64_t[this->capacity_
];
1640 memset(this->hash_table_
, 0, this->capacity_
* sizeof(uint64_t));
1641 this->index_table_
= new uint32_t[this->capacity_
];
1642 memset(this->index_table_
, 0, this->capacity_
* sizeof(uint32_t));
1645 // Grow the hash table when we reach 2/3 capacity.
1648 Dwp_output_file::Dwp_index::grow()
1650 unsigned int old_capacity
= this->capacity_
;
1651 uint64_t* old_hash_table
= this->hash_table_
;
1652 uint32_t* old_index_table
= this->index_table_
;
1653 unsigned int old_used
= this->used_
;
1655 this->capacity_
= old_capacity
* 2;
1656 this->hash_table_
= new uint64_t[this->capacity_
];
1657 memset(this->hash_table_
, 0, this->capacity_
* sizeof(uint64_t));
1658 this->index_table_
= new uint32_t[this->capacity_
];
1659 memset(this->index_table_
, 0, this->capacity_
* sizeof(uint32_t));
1662 for (unsigned int i
= 0; i
< old_capacity
; ++i
)
1664 uint64_t signature
= old_hash_table
[i
];
1668 bool found
= this->find_or_add(signature
, &slot
);
1669 gold_assert(!found
);
1670 this->hash_table_
[slot
] = signature
;
1671 this->index_table_
[slot
] = old_index_table
[i
];
1675 gold_assert(this->used_
== old_used
);
1677 delete[] old_hash_table
;
1678 delete[] old_index_table
;
1681 // Initialize the output file.
1684 Dwp_output_file::initialize()
1686 // We can't initialize the output file until we've recorded the
1687 // target info from the first input file.
1688 gold_assert(this->size_
> 0);
1691 // Finalize the file, write the string tables and index sections,
1692 // and close the file.
1695 Dwp_output_file::finalize()
1699 // Write the debug string table.
1700 if (this->have_strings_
)
1702 this->stringpool_
.set_string_offsets();
1703 section_size_type len
= this->stringpool_
.get_strtab_size();
1704 buf
= new unsigned char[len
];
1705 this->stringpool_
.write_to_buffer(buf
, len
);
1706 this->add_section(".debug_str.dwo", buf
, len
, 1);
1710 // Write the CU and TU indexes.
1711 if (this->big_endian_
)
1713 this->write_index
<true>(".debug_cu_index", this->cu_index_
);
1714 this->write_index
<true>(".debug_tu_index", this->tu_index_
);
1718 this->write_index
<false>(".debug_cu_index", this->cu_index_
);
1719 this->write_index
<false>(".debug_tu_index", this->tu_index_
);
1722 off_t file_offset
= this->next_file_offset_
;
1724 // Write the section string table.
1725 this->shstrndx_
= this->shnum_
++;
1726 const char* shstrtab_name
=
1727 this->shstrtab_
.add_with_length(".shstrtab",
1728 sizeof(".shstrtab") - 1,
1730 this->shstrtab_
.set_string_offsets();
1731 section_size_type shstrtab_len
= this->shstrtab_
.get_strtab_size();
1732 buf
= new unsigned char[shstrtab_len
];
1733 this->shstrtab_
.write_to_buffer(buf
, shstrtab_len
);
1734 off_t shstrtab_off
= file_offset
;
1735 ::fseek(this->fd_
, file_offset
, 0);
1736 if (::fwrite(buf
, 1, shstrtab_len
, this->fd_
) < shstrtab_len
)
1737 gold_fatal(_("%s: error writing section '.shstrtab'"), this->name_
);
1739 file_offset
+= shstrtab_len
;
1741 // Write the section header table. The first entry is a NULL entry.
1742 // This is followed by the debug sections, and finally we write the
1743 // .shstrtab section header.
1744 file_offset
= align_offset(file_offset
, this->size_
== 32 ? 4 : 8);
1745 this->shoff_
= file_offset
;
1746 ::fseek(this->fd_
, file_offset
, 0);
1747 section_size_type sh0_size
= 0;
1748 unsigned int sh0_link
= 0;
1749 if (this->shnum_
>= elfcpp::SHN_LORESERVE
)
1750 sh0_size
= this->shnum_
;
1751 if (this->shstrndx_
>= elfcpp::SHN_LORESERVE
)
1752 sh0_link
= this->shstrndx_
;
1753 this->write_shdr(NULL
, 0, 0, 0, 0, sh0_size
, sh0_link
, 0, 0, 0);
1754 for (unsigned int i
= 0; i
< this->sections_
.size(); ++i
)
1756 Section
& sect
= this->sections_
[i
];
1757 this->write_shdr(sect
.name
, elfcpp::SHT_PROGBITS
, 0, 0, sect
.offset
,
1758 sect
.size
, 0, 0, sect
.align
, 0);
1760 this->write_shdr(shstrtab_name
, elfcpp::SHT_STRTAB
, 0, 0,
1761 shstrtab_off
, shstrtab_len
, 0, 0, 1, 0);
1763 // Write the ELF header.
1767 if (this->fd_
!= NULL
)
1769 if (::fclose(this->fd_
) != 0)
1770 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
1775 // Write a CU or TU index section.
1776 template<bool big_endian
>
1778 Dwp_output_file::write_index(const char* sect_name
, const Dwp_index
& index
)
1780 const unsigned int nslots
= index
.hash_table_total_slots();
1781 const unsigned int nused
= index
.hash_table_used_slots();
1782 const unsigned int npool
= index
.shndx_pool_size();
1783 const section_size_type index_size
= (4 * sizeof(uint32_t)
1784 + nslots
* sizeof(uint64_t)
1785 + nslots
* sizeof(uint32_t)
1786 + npool
* sizeof(uint32_t));
1788 // Allocate a buffer for the section contents.
1789 unsigned char* buf
= new unsigned char[index_size
];
1790 unsigned char* p
= buf
;
1792 // Write the section header: version number, padding,
1793 // number of used slots and total number of slots.
1794 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, 1);
1795 p
+= sizeof(uint32_t);
1796 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, 0);
1797 p
+= sizeof(uint32_t);
1798 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, nused
);
1799 p
+= sizeof(uint32_t);
1800 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, nslots
);
1801 p
+= sizeof(uint32_t);
1803 // Write the hash table.
1804 for (unsigned int i
= 0; i
< nslots
; ++i
)
1806 elfcpp::Swap_unaligned
<64, big_endian
>::writeval(p
, index
.hash_table(i
));
1807 p
+= sizeof(uint64_t);
1810 // Write the parallel index table.
1811 for (unsigned int i
= 0; i
< nslots
; ++i
)
1813 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, index
.index_table(i
));
1814 p
+= sizeof(uint32_t);
1817 // Write the section index pool.
1818 Dwp_index::Shndx_pool::const_iterator pool
= index
.shndx_pool();
1819 for (unsigned int i
= 0; i
< npool
; ++i
)
1821 gold_assert(pool
!= index
.shndx_pool_end());
1822 elfcpp::Swap_unaligned
<32, big_endian
>::writeval(p
, *pool
);
1823 p
+= sizeof(uint32_t);
1827 gold_assert(p
== buf
+ index_size
);
1829 this->add_section(sect_name
, buf
, index_size
, sizeof(uint64_t));
1834 // Write the ELF header.
1837 Dwp_output_file::write_ehdr()
1839 if (this->size_
== 32)
1841 if (this->big_endian_
)
1842 return this->sized_write_ehdr
<32, true>();
1844 return this->sized_write_ehdr
<32, false>();
1846 else if (this->size_
== 64)
1848 if (this->big_endian_
)
1849 return this->sized_write_ehdr
<64, true>();
1851 return this->sized_write_ehdr
<64, false>();
1857 template<unsigned int size
, bool big_endian
>
1859 Dwp_output_file::sized_write_ehdr()
1861 const unsigned int ehdr_size
= elfcpp::Elf_sizes
<size
>::ehdr_size
;
1862 unsigned char buf
[ehdr_size
];
1863 elfcpp::Ehdr_write
<size
, big_endian
> ehdr(buf
);
1865 unsigned char e_ident
[elfcpp::EI_NIDENT
];
1866 memset(e_ident
, 0, elfcpp::EI_NIDENT
);
1867 e_ident
[elfcpp::EI_MAG0
] = elfcpp::ELFMAG0
;
1868 e_ident
[elfcpp::EI_MAG1
] = elfcpp::ELFMAG1
;
1869 e_ident
[elfcpp::EI_MAG2
] = elfcpp::ELFMAG2
;
1870 e_ident
[elfcpp::EI_MAG3
] = elfcpp::ELFMAG3
;
1872 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS32
;
1873 else if (size
== 64)
1874 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS64
;
1877 e_ident
[elfcpp::EI_DATA
] = (big_endian
1878 ? elfcpp::ELFDATA2MSB
1879 : elfcpp::ELFDATA2LSB
);
1880 e_ident
[elfcpp::EI_VERSION
] = elfcpp::EV_CURRENT
;
1881 ehdr
.put_e_ident(e_ident
);
1883 ehdr
.put_e_type(elfcpp::ET_REL
);
1884 ehdr
.put_e_machine(this->machine_
);
1885 ehdr
.put_e_version(elfcpp::EV_CURRENT
);
1886 ehdr
.put_e_entry(0);
1887 ehdr
.put_e_phoff(0);
1888 ehdr
.put_e_shoff(this->shoff_
);
1889 ehdr
.put_e_flags(0);
1890 ehdr
.put_e_ehsize(elfcpp::Elf_sizes
<size
>::ehdr_size
);
1891 ehdr
.put_e_phentsize(0);
1892 ehdr
.put_e_phnum(0);
1893 ehdr
.put_e_shentsize(elfcpp::Elf_sizes
<size
>::shdr_size
);
1894 ehdr
.put_e_shnum(this->shnum_
< elfcpp::SHN_LORESERVE
? this->shnum_
: 0);
1895 ehdr
.put_e_shstrndx(this->shstrndx_
< elfcpp::SHN_LORESERVE
1897 : static_cast<unsigned int>(elfcpp::SHN_XINDEX
));
1899 ::fseek(this->fd_
, 0, 0);
1900 if (::fwrite(buf
, 1, ehdr_size
, this->fd_
) < ehdr_size
)
1901 gold_fatal(_("%s: error writing ELF header"), this->name_
);
1904 // Write a section header.
1907 Dwp_output_file::write_shdr(const char* name
, unsigned int type
,
1908 unsigned int flags
, uint64_t addr
, off_t offset
,
1909 section_size_type sect_size
, unsigned int link
,
1910 unsigned int info
, unsigned int align
,
1911 unsigned int ent_size
)
1913 if (this->size_
== 32)
1915 if (this->big_endian_
)
1916 return this->sized_write_shdr
<32, true>(name
, type
, flags
, addr
,
1917 offset
, sect_size
, link
, info
,
1920 return this->sized_write_shdr
<32, false>(name
, type
, flags
, addr
,
1921 offset
, sect_size
, link
, info
,
1924 else if (this->size_
== 64)
1926 if (this->big_endian_
)
1927 return this->sized_write_shdr
<64, true>(name
, type
, flags
, addr
,
1928 offset
, sect_size
, link
, info
,
1931 return this->sized_write_shdr
<64, false>(name
, type
, flags
, addr
,
1932 offset
, sect_size
, link
, info
,
1939 template<unsigned int size
, bool big_endian
>
1941 Dwp_output_file::sized_write_shdr(const char* name
, unsigned int type
,
1942 unsigned int flags
, uint64_t addr
,
1943 off_t offset
, section_size_type sect_size
,
1944 unsigned int link
, unsigned int info
,
1945 unsigned int align
, unsigned int ent_size
)
1947 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1948 unsigned char buf
[shdr_size
];
1949 elfcpp::Shdr_write
<size
, big_endian
> shdr(buf
);
1951 shdr
.put_sh_name(name
== NULL
? 0 : this->shstrtab_
.get_offset(name
));
1952 shdr
.put_sh_type(type
);
1953 shdr
.put_sh_flags(flags
);
1954 shdr
.put_sh_addr(addr
);
1955 shdr
.put_sh_offset(offset
);
1956 shdr
.put_sh_size(sect_size
);
1957 shdr
.put_sh_link(link
);
1958 shdr
.put_sh_info(info
);
1959 shdr
.put_sh_addralign(align
);
1960 shdr
.put_sh_entsize(ent_size
);
1961 if (::fwrite(buf
, 1, shdr_size
, this->fd_
) < shdr_size
)
1962 gold_fatal(_("%s: error writing section header table"), this->name_
);
1965 // Class Dwo_id_info_reader.
1967 // Visit a compilation unit.
1970 Dwo_id_info_reader::visit_compilation_unit(off_t
, off_t
, Dwarf_die
* die
)
1972 this->dwo_id_
= die
->uint_attribute(elfcpp::DW_AT_GNU_dwo_id
);
1973 if (this->dwo_id_
!= 0)
1974 this->dwo_id_found_
= true;
1977 // Visit a type unit.
1980 Dwo_id_info_reader::visit_type_unit(off_t
, off_t
, uint64_t signature
, Dwarf_die
*)
1982 this->type_sig_
= signature
;
1983 this->type_sig_found_
= true;
1986 }; // End namespace gold
1988 using namespace gold
;
1992 struct option dwp_options
[] =
1994 { "help", no_argument
, NULL
, 'h' },
1995 { "output", required_argument
, NULL
, 'o' },
1996 { "verbose", no_argument
, NULL
, 'v' },
1997 { "version", no_argument
, NULL
, 'V' },
1998 { NULL
, 0, NULL
, 0 }
2001 // Print usage message and exit.
2004 usage(FILE* fd
, int exit_status
)
2006 fprintf(fd
, _("Usage: %s [options] file...\n"), program_name
);
2007 fprintf(fd
, _(" -h, --help Print this help message\n"));
2008 fprintf(fd
, _(" -o FILE, --output FILE Set output dwp file name"
2010 fprintf(fd
, _(" -v, --verbose Verbose output\n"));
2011 fprintf(fd
, _(" -V, --version Print version number\n"));
2013 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
2014 const char* report
= REPORT_BUGS_TO
;
2015 if (*report
!= '\0')
2016 fprintf(fd
, _("\nReport bugs to %s\n"), report
);
2020 // Report version information.
2025 // This output is intended to follow the GNU standards.
2026 printf("GNU dwp %s\n", BFD_VERSION_STRING
);
2027 printf(_("Copyright 2012 Free Software Foundation, Inc.\n"));
2029 This program is free software; you may redistribute it under the terms of\n\
2030 the GNU General Public License version 3 or (at your option) any later version.\n\
2031 This program has absolutely no warranty.\n"));
2038 main(int argc
, char** argv
)
2040 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
2041 setlocale(LC_MESSAGES
, "");
2043 #if defined (HAVE_SETLOCALE)
2044 setlocale(LC_CTYPE
, "");
2046 bindtextdomain(PACKAGE
, LOCALEDIR
);
2047 textdomain(PACKAGE
);
2049 program_name
= argv
[0];
2051 // Initialize the global parameters, to let random code get to the
2053 Errors
errors(program_name
);
2054 set_parameters_errors(&errors
);
2056 // Initialize gold's global options. We don't use these in
2057 // this program, but they need to be initialized so that
2058 // functions we call from libgold work properly.
2059 General_options options
;
2060 set_parameters_options(&options
);
2062 // In libiberty; expands @filename to the args in "filename".
2063 expandargv(&argc
, &argv
);
2065 // Collect file names and options.
2066 typedef std::vector
<char*> File_list
;
2068 const char* output_filename
= NULL
;
2069 bool verbose
= false;
2071 while ((c
= getopt_long(argc
, argv
, "ho:vV", dwp_options
, NULL
)) != -1)
2076 usage(stdout
, EXIT_SUCCESS
);
2078 output_filename
= optarg
;
2087 usage(stderr
, EXIT_FAILURE
);
2090 for (int i
= optind
; i
< argc
; ++i
)
2091 files
.push_back(argv
[i
]);
2094 gold_fatal(_("no input files"));
2095 if (output_filename
== NULL
)
2096 gold_fatal(_("no output file specified"));
2098 Dwp_output_file
output_file(output_filename
);
2100 // Process each file, adding its contents to the output file.
2101 for (File_list::const_iterator f
= files
.begin(); f
!= files
.end(); ++f
)
2104 fprintf(stderr
, "%s\n", *f
);
2105 Dwo_file
dwo_file(*f
);
2106 dwo_file
.read(&output_file
);
2109 output_file
.finalize();
2111 return EXIT_SUCCESS
;