// dwp.cc -- DWARF packaging utility // Copyright 2012 Free Software Foundation, Inc. // Written by Cary Coutant . // This file is part of dwp, the DWARF packaging utility. // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, // MA 02110-1301, USA. #include "dwp.h" #include #include #include #include #include #include #include #include #include "getopt.h" #include "libiberty.h" #include "elfcpp.h" #include "elfcpp_file.h" #include "dirsearch.h" #include "fileread.h" #include "object.h" #include "compressed_output.h" #include "stringpool.h" #include "dwarf_reader.h" static void usage() ATTRIBUTE_NORETURN; namespace gold { class Dwp_output_file; // An input file. // This class may represent either a .dwo file or a .dwp file // produced by an earlier run. template class Sized_relobj_dwo; class Dwo_file { public: Dwo_file(const char* name) : name_(name), obj_(NULL), input_file_(NULL), is_compressed_(), str_offset_map_() { } ~Dwo_file(); // Read the input file and send its contents to OUTPUT_FILE. void read(Dwp_output_file* output_file); private: // Types for mapping input string offsets to output string offsets. typedef std::pair Str_offset_map_entry; typedef std::vector Str_offset_map; // A less-than comparison routine for Str_offset_map. struct Offset_compare { bool operator()(const Str_offset_map_entry& i1, const Str_offset_map_entry& i2) const { return i1.first < i2.first; } }; // Create a Sized_relobj_dwo of the given size and endianness, // and record the target info. P is a pointer to the ELF header // in memory. Relobj* make_object(int size, bool big_endian, const unsigned char* p, Input_file* input_file, Dwp_output_file* output_file); template Relobj* sized_make_object(const unsigned char* p, Input_file* input_file, Dwp_output_file* output_file); // Return the number of sections in the input object file. unsigned int shnum() const { return this->obj_->shnum(); } // Return section type. unsigned int section_type(unsigned int shndx) { return this->obj_->section_type(shndx); } // Get the name of a section. std::string section_name(unsigned int shndx) { return this->obj_->section_name(shndx); } // Return a view of the contents of a section, decompressed if necessary. // Set *PLEN to the size. Set *IS_NEW to true if the contents need to be // deleted by the caller. const unsigned char* section_contents(unsigned int shndx, section_size_type* plen, bool* is_new) { return this->obj_->decompressed_section_contents(shndx, plen, is_new); } // Read the .debug_cu_index section of a .dwp file, // and process the CU sets. void read_compunit_index(unsigned int, Dwp_output_file*); template void sized_read_compunit_index(unsigned int, Dwp_output_file*); // Read the .debug_tu_index section of a .dwp file, // and process the TU sets. void read_typeunit_index(unsigned int, Dwp_output_file*); template void sized_read_typeunit_index(unsigned int, Dwp_output_file*); // Merge the input string table section into the output file. void add_strings(Dwp_output_file*, unsigned int); // Copy a section from the input file to the output file. unsigned int copy_section(Dwp_output_file* output_file, unsigned int shndx, const char* section_name, bool is_str_offsets); // Remap the string offsets in the .debug_str_offsets.dwo section. const unsigned char* remap_str_offsets(const unsigned char* contents, section_size_type len); template const unsigned char* sized_remap_str_offsets(const unsigned char* contents, section_size_type len); // Remap a single string offsets from an offset in the input string table // to an offset in the output string table. unsigned int remap_str_offset(section_offset_type val); // Add a set of .debug_info and related sections to OUTPUT_FILE. void add_cu_set(Dwp_output_file* output_file, uint64_t dwo_id, unsigned int debug_info, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_loc, unsigned int debug_str_offsets, unsigned int debug_macinfo, unsigned int debug_macro); // Add a set of .debug_types and related sections to OUTPUT_FILE. void add_tu_set(Dwp_output_file* output_file, uint64_t type_sig, unsigned int debug_types, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_str_offsets); // The filename. const char* name_; // The ELF file, represented as a gold Relobj instance. Relobj* obj_; // The Input_file object. Input_file* input_file_; // Flags indicating which sections are compressed. std::vector is_compressed_; // Map input section index onto output section index. std::vector shndx_map_; // Map input string offsets to output string offsets. Str_offset_map str_offset_map_; }; // An ELF input file. // We derive from Sized_relobj so that we can use interfaces // in libgold to access the file. template class Sized_relobj_dwo : public Sized_relobj { public: typedef typename elfcpp::Elf_types::Elf_Addr Address; typedef typename Sized_relobj::Symbols Symbols; Sized_relobj_dwo(const char* name, Input_file* input_file, const elfcpp::Ehdr& ehdr) : Sized_relobj(name, input_file), elf_file_(this, ehdr) { } ~Sized_relobj_dwo() { } // Setup the section information. void setup(); protected: // Return section type. unsigned int do_section_type(unsigned int shndx) { return this->elf_file_.section_type(shndx); } // Get the name of a section. std::string do_section_name(unsigned int shndx) { return this->elf_file_.section_name(shndx); } // Get the size of a section. uint64_t do_section_size(unsigned int shndx) { return this->elf_file_.section_size(shndx); } // Return a view of the contents of a section. const unsigned char* do_section_contents(unsigned int, section_size_type*, bool); // Return a view of the uncompressed contents of a section. Set *PLEN // to the size. Set *IS_NEW to true if the contents need to be deleted // by the caller. const unsigned char* do_decompressed_section_contents(unsigned int shndx, section_size_type* plen, bool* is_new); // The following virtual functions are abstract in the base classes, // but are not used here. // Read the symbols. void do_read_symbols(Read_symbols_data*) { gold_unreachable(); } // Lay out the input sections. void do_layout(Symbol_table*, Layout*, Read_symbols_data*) { gold_unreachable(); } // Layout sections whose layout was deferred while waiting for // input files from a plugin. void do_layout_deferred_sections(Layout*) { gold_unreachable(); } // Add the symbols to the symbol table. void do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*) { gold_unreachable(); } Archive::Should_include do_should_include_member(Symbol_table*, Layout*, Read_symbols_data*, std::string*) { gold_unreachable(); } // Iterate over global symbols, calling a visitor class V for each. void do_for_all_global_symbols(Read_symbols_data*, Library_base::Symbol_visitor_base*) { gold_unreachable(); } // Return section flags. uint64_t do_section_flags(unsigned int) { gold_unreachable(); } // Return section entsize. uint64_t do_section_entsize(unsigned int) { gold_unreachable(); } // Return section address. uint64_t do_section_address(unsigned int) { gold_unreachable(); } // Return the section link field. unsigned int do_section_link(unsigned int) { gold_unreachable(); } // Return the section link field. unsigned int do_section_info(unsigned int) { gold_unreachable(); } // Return the section alignment. uint64_t do_section_addralign(unsigned int) { gold_unreachable(); } // Return the Xindex structure to use. Xindex* do_initialize_xindex() { gold_unreachable(); } // Get symbol counts. void do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const { gold_unreachable(); } // Get global symbols. const Symbols* do_get_global_symbols() const { return NULL; } // Return the value of a local symbol. uint64_t do_local_symbol_value(unsigned int, uint64_t) const { gold_unreachable(); } unsigned int do_local_plt_offset(unsigned int) const { gold_unreachable(); } // Return whether local symbol SYMNDX is a TLS symbol. bool do_local_is_tls(unsigned int) const { gold_unreachable(); } // Return the number of local symbols. unsigned int do_local_symbol_count() const { gold_unreachable(); } // Return the number of local symbols in the output symbol table. unsigned int do_output_local_symbol_count() const { gold_unreachable(); } // Return the file offset for local symbols in the output symbol table. off_t do_local_symbol_offset() const { gold_unreachable(); } // Read the relocs. void do_read_relocs(Read_relocs_data*) { gold_unreachable(); } // Process the relocs to find list of referenced sections. Used only // during garbage collection. void do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*) { gold_unreachable(); } // Scan the relocs and adjust the symbol table. void do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*) { gold_unreachable(); } // Count the local symbols. void do_count_local_symbols(Stringpool_template*, Stringpool_template*) { gold_unreachable(); } // Finalize the local symbols. unsigned int do_finalize_local_symbols(unsigned int, off_t, Symbol_table*) { gold_unreachable(); } // Set the offset where local dynamic symbol information will be stored. unsigned int do_set_local_dynsym_indexes(unsigned int) { gold_unreachable(); } // Set the offset where local dynamic symbol information will be stored. unsigned int do_set_local_dynsym_offset(off_t) { gold_unreachable(); } // Relocate the input sections and write out the local symbols. void do_relocate(const Symbol_table*, const Layout*, Output_file*) { gold_unreachable(); } private: // General access to the ELF file. elfcpp::Elf_file elf_file_; }; // The output file. // This class is responsible for collecting the debug index information // and writing the .dwp file in ELF format. class Dwp_output_file { public: Dwp_output_file(const char* name) : name_(name), machine_(0), size_(0), big_endian_(false), osabi_(0), abiversion_(0), fd_(NULL), next_file_offset_(0), shnum_(1), sections_(), shoff_(0), shstrndx_(0), have_strings_(false), stringpool_(), shstrtab_(), cu_index_(), tu_index_(), last_type_sig_(0), last_tu_slot_(0) { this->stringpool_.set_no_zero_null(); } // Record the target info from an input file. void record_target_info(const char* name, int machine, int size, bool big_endian, int osabi, int abiversion); // Add a string to the debug strings section. section_offset_type add_string(const char* str, size_t len); // Add a section to the output file, and return the new section index. unsigned int add_section(const char* section_name, const unsigned char* contents, section_size_type len, int align); // Add a set of .debug_info and related sections to the output file. void add_cu_set(uint64_t dwo_id, unsigned int debug_info, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_loc, unsigned int debug_str_offsets, unsigned int debug_macinfo, unsigned int debug_macro); // Lookup a type signature and return TRUE if we have already seen it. bool lookup_tu(uint64_t type_sig); // Add a set of .debug_types and related sections to the output file. void add_tu_set(uint64_t type_sig, unsigned int debug_types, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_str_offsets); // Finalize the file, write the string tables and index sections, // and close the file. void finalize(); private: // Sections in the output file. struct Section { const char* name; off_t offset; section_size_type size; int align; }; // A set of sections for a compilation unit or type unit. struct Cu_or_tu_set { uint64_t signature; unsigned int debug_info_or_types; unsigned int debug_abbrev; unsigned int debug_line; unsigned int debug_loc; unsigned int debug_str_offsets; unsigned int debug_macinfo; unsigned int debug_macro; }; // The index sections defined by the DWARF Package File Format spec. class Dwp_index { public: // Vector for the section index pool. typedef std::vector Shndx_pool; Dwp_index() : capacity_(0), used_(0), hash_table_(NULL), shndx_pool_() { } ~Dwp_index() { } // Find a slot in the hash table for SIGNATURE. Return TRUE // if the entry already exists. bool find_or_add(uint64_t signature, unsigned int* slotp); // Enter a CU or TU set at the given SLOT in the hash table. void enter_set(unsigned int slot, const Cu_or_tu_set& set); // Return the contents of the given SLOT in the hash table of signatures. uint64_t hash_table(unsigned int slot) const { return this->hash_table_[slot]; } // Return the contents of the given SLOT in the parallel table of // shndx pool indexes. uint32_t index_table(unsigned int slot) const { return this->index_table_[slot]; } // Return the total number of slots in the hash table. unsigned int hash_table_total_slots() const { return this->capacity_; } // Return the number of used slots in the hash table. unsigned int hash_table_used_slots() const { return this->used_; } // Return an iterator into the shndx pool. Shndx_pool::const_iterator shndx_pool() const { return this->shndx_pool_.begin(); } Shndx_pool::const_iterator shndx_pool_end() const { return this->shndx_pool_.end(); } // Return the number of entries in the shndx pool. unsigned int shndx_pool_size() const { return this->shndx_pool_.size(); } private: // Initialize the hash table. void initialize(); // Grow the hash table when we reach 2/3 capacity. void grow(); // The number of slots in the table, a power of 2 such that // capacity > 3 * size / 2. unsigned int capacity_; // The current number of used slots in the hash table. unsigned int used_; // The storage for the hash table of signatures. uint64_t* hash_table_; // The storage for the parallel table of shndx pool indexes. uint32_t* index_table_; // The pool of section indexes. Shndx_pool shndx_pool_; }; // End class Dwp_output_file::Dwp_index. // Initialize the output file. void initialize(); // Write the ELF header. void write_ehdr(); template void sized_write_ehdr(); // Write a section header. void write_shdr(const char* name, unsigned int type, unsigned int flags, uint64_t addr, off_t offset, section_size_type sect_size, unsigned int link, unsigned int info, unsigned int align, unsigned int ent_size); template void sized_write_shdr(const char* name, unsigned int type, unsigned int flags, uint64_t addr, off_t offset, section_size_type sect_size, unsigned int link, unsigned int info, unsigned int align, unsigned int ent_size); // Write a CU or TU index section. template void write_index(const char* sect_name, const Dwp_index& index); // The output filename. const char* name_; // ELF header parameters. int machine_; int size_; int big_endian_; int osabi_; int abiversion_; // The output file descriptor. FILE* fd_; // Next available file offset. off_t next_file_offset_; // The number of sections. unsigned int shnum_; // Section table. The first entry is shndx 1. std::vector
sections_; // File offset of the section header table. off_t shoff_; // Section index of the section string table. unsigned int shstrndx_; // TRUE if we have added any strings to the string pool. bool have_strings_; // String pool for the output .debug_str.dwo section. Stringpool stringpool_; // String pool for the .shstrtab section. Stringpool shstrtab_; // The compilation unit index. Dwp_index cu_index_; // The type unit index. Dwp_index tu_index_; // Cache of the last type signature looked up. uint64_t last_type_sig_; // Cache of the slot index for the last type signature. unsigned int last_tu_slot_; }; // A specialization of Dwarf_info_reader, for reading dwo_ids and // type signatures from DWARF CUs and TUs. class Dwo_id_info_reader : public Dwarf_info_reader { public: Dwo_id_info_reader(bool is_type_unit, Relobj* object, const unsigned char* symbols, off_t symbols_size, unsigned int shndx, unsigned int reloc_shndx, unsigned int reloc_type) : Dwarf_info_reader(is_type_unit, object, symbols, symbols_size, shndx, reloc_shndx, reloc_type), dwo_id_found_(false), dwo_id_(0), type_sig_found_(false), type_sig_(0) { } ~Dwo_id_info_reader() { } // Return the dwo_id from a DWARF compilation unit DIE in *DWO_ID. bool get_dwo_id(uint64_t* dwo_id) { this->parse(); if (!this->dwo_id_found_) return false; *dwo_id = this->dwo_id_; return true; } // Return the type signature from a DWARF type unit DIE in *TYPE_SIG. bool get_type_sig(uint64_t* type_sig) { this->parse(); if (!this->type_sig_found_) return false; *type_sig = this->type_sig_; return true; } protected: // Visit a compilation unit. virtual void visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die*); // Visit a type unit. virtual void visit_type_unit(off_t tu_offset, off_t type_offset, uint64_t signature, Dwarf_die*); private: // Visit a top-level DIE. void visit_top_die(Dwarf_die* die); // TRUE if we found a dwo_id. bool dwo_id_found_; // The dwo_id. uint64_t dwo_id_; // TRUE if we found a type signature. bool type_sig_found_; // The type signature. uint64_t type_sig_; }; // Class Sized_relobj_dwo. // Setup the section information. template void Sized_relobj_dwo::setup() { const unsigned int shnum = this->elf_file_.shnum(); this->set_shnum(shnum); this->section_offsets().resize(shnum); } // Return a view of the contents of a section. template const unsigned char* Sized_relobj_dwo::do_section_contents( unsigned int shndx, section_size_type* plen, bool cache) { Object::Location loc(this->elf_file_.section_contents(shndx)); *plen = convert_to_section_size_type(loc.data_size); if (*plen == 0) { static const unsigned char empty[1] = { '\0' }; return empty; } return this->get_view(loc.file_offset, *plen, true, cache); } // Return a view of the uncompressed contents of a section. Set *PLEN // to the size. Set *IS_NEW to true if the contents need to be deleted // by the caller. template const unsigned char* Sized_relobj_dwo::do_decompressed_section_contents( unsigned int shndx, section_size_type* plen, bool* is_new) { section_size_type buffer_size; const unsigned char* buffer = this->do_section_contents(shndx, &buffer_size, false); std::string sect_name = this->do_section_name(shndx); if (!is_prefix_of(".zdebug_", sect_name.c_str())) { *plen = buffer_size; *is_new = false; return buffer; } section_size_type uncompressed_size = get_uncompressed_size(buffer, buffer_size); unsigned char* uncompressed_data = new unsigned char[uncompressed_size]; if (!decompress_input_section(buffer, buffer_size, uncompressed_data, uncompressed_size)) this->error(_("could not decompress section %s"), this->section_name(shndx).c_str()); *plen = uncompressed_size; *is_new = true; return uncompressed_data; } // Class Dwo_file. Dwo_file::~Dwo_file() { if (this->input_file_ != NULL) delete this->input_file_; if (this->obj_ != NULL) delete this->obj_; } // Read the input file and send its contents to OUTPUT_FILE. void Dwo_file::read(Dwp_output_file* output_file) { // Open the input file. this->input_file_ = new Input_file(this->name_); Dirsearch dirpath; int index; if (!this->input_file_->open(dirpath, NULL, &index)) gold_fatal(_("%s: can't open"), this->name_); // Check that it's an ELF file. off_t filesize = this->input_file_->file().filesize(); int hdrsize = elfcpp::Elf_recognizer::max_header_size; if (filesize < hdrsize) hdrsize = filesize; const unsigned char* p = this->input_file_->file().get_view(0, 0, hdrsize, true, false); if (!elfcpp::Elf_recognizer::is_elf_file(p, hdrsize)) gold_fatal(_("%s: not an ELF object file"), this->name_); // Get the size, endianness, machine, etc. info from the header, // make an appropriately-sized Relobj, and pass the target info // to the output object. int size; bool big_endian; std::string error; if (!elfcpp::Elf_recognizer::is_valid_header(p, hdrsize, &size, &big_endian, &error)) gold_fatal(_("%s: %s"), this->name_, error.c_str()); this->obj_ = this->make_object(size, big_endian, p, this->input_file_, output_file); unsigned int shnum = this->shnum(); this->is_compressed_.resize(shnum); this->shndx_map_.resize(shnum); typedef std::vector Types_list; Types_list debug_types; unsigned int debug_info = 0; unsigned int debug_abbrev = 0; unsigned int debug_line = 0; unsigned int debug_loc = 0; unsigned int debug_str = 0; unsigned int debug_str_offsets = 0; unsigned int debug_macinfo = 0; unsigned int debug_macro = 0; unsigned int debug_cu_index = 0; unsigned int debug_tu_index = 0; // Scan the section table and look for .dwp index sections. // (Section index 0 is a dummy section; skip it.) for (unsigned int i = 1; i < shnum; i++) { if (this->section_type(i) != elfcpp::SHT_PROGBITS) continue; std::string sect_name = this->section_name(i); const char* suffix = sect_name.c_str(); if (is_prefix_of(".debug_", suffix)) suffix += 7; else if (is_prefix_of(".zdebug_", suffix)) { this->is_compressed_[i] = true; suffix += 8; } else continue; if (strcmp(suffix, "cu_index") == 0) debug_cu_index = i; else if (strcmp(suffix, "tu_index") == 0) debug_tu_index = i; else if (strcmp(suffix, "str.dwo") == 0) debug_str = i; } // Merge the input string table into the output string table. this->add_strings(output_file, debug_str); // If we found any .dwp index sections, read those and add the section // sets to the output file. if (debug_cu_index > 0 || debug_tu_index > 0) { if (debug_cu_index > 0) this->read_compunit_index(debug_cu_index, output_file); if (debug_tu_index > 0) this->read_typeunit_index(debug_tu_index, output_file); return; } // If we found no index sections, this is a .dwo file. // Scan the section table and collect the debug sections. for (unsigned int i = 1; i < shnum; i++) { if (this->section_type(i) != elfcpp::SHT_PROGBITS) continue; std::string sect_name = this->section_name(i); const char* suffix = sect_name.c_str(); if (is_prefix_of(".debug_", suffix)) suffix += 7; else if (is_prefix_of(".zdebug_", suffix)) suffix += 8; else continue; // TODO: Check for one of each section (except .debug_types). if (strcmp(suffix, "info.dwo") == 0) debug_info = i; else if (strcmp(suffix, "types.dwo") == 0) debug_types.push_back(i); else if (strcmp(suffix, "abbrev.dwo") == 0) debug_abbrev = i; else if (strcmp(suffix, "line.dwo") == 0) debug_line = i; else if (strcmp(suffix, "loc.dwo") == 0) debug_loc = i; else if (strcmp(suffix, "str_offsets.dwo") == 0) debug_str_offsets = i; else if (strcmp(suffix, "macinfo.dwo") == 0) debug_macinfo = i; else if (strcmp(suffix, "macro.dwo") == 0) debug_macro = i; } if (debug_info > 0) { // Extract the dwo_id from .debug_info.dwo section. uint64_t dwo_id; Dwo_id_info_reader dwarf_reader(false, this->obj_, NULL, 0, debug_info, 0, 0); dwarf_reader.set_abbrev_shndx(debug_abbrev); if (!dwarf_reader.get_dwo_id(&dwo_id)) gold_fatal(_("%s: .debug_info.dwo section does not have DW_AT_GNU_dwo_id " "attribute"), this->name_); this->add_cu_set(output_file, dwo_id, debug_info, debug_abbrev, debug_line, debug_loc, debug_str_offsets, debug_macinfo, debug_macro); } for (Types_list::const_iterator tp = debug_types.begin(); tp != debug_types.end(); ++tp) { // Extract the type signature from .debug_types.dwo section. uint64_t type_sig; gold_assert(*tp > 0); Dwo_id_info_reader dwarf_reader(true, this->obj_, NULL, 0, *tp, 0, 0); dwarf_reader.set_abbrev_shndx(debug_abbrev); if (!dwarf_reader.get_type_sig(&type_sig)) gold_fatal(_("%s: .debug_types.dwo section does not have type signature"), this->name_); this->add_tu_set(output_file, type_sig, *tp, debug_abbrev, debug_line, debug_str_offsets); } } // Create a Sized_relobj_dwo of the given size and endianness, // and record the target info. P is a pointer to the ELF header // in memory. Relobj* Dwo_file::make_object(int size, bool big_endian, const unsigned char* p, Input_file* input_file, Dwp_output_file* output_file) { if (size == 32) { if (big_endian) #ifdef HAVE_TARGET_32_BIG return this->sized_make_object<32, true>(p, input_file, output_file); #else gold_unreachable(); #endif else #ifdef HAVE_TARGET_32_LITTLE return this->sized_make_object<32, false>(p, input_file, output_file); #else gold_unreachable(); #endif } else if (size == 64) { if (big_endian) #ifdef HAVE_TARGET_64_BIG return this->sized_make_object<64, true>(p, input_file, output_file); #else gold_unreachable(); #endif else #ifdef HAVE_TARGET_64_LITTLE return this->sized_make_object<64, false>(p, input_file, output_file); #else gold_unreachable(); #endif } else gold_unreachable(); } // Function template to create a Sized_relobj_dwo and record the target info. // P is a pointer to the ELF header in memory. template Relobj* Dwo_file::sized_make_object(const unsigned char* p, Input_file* input_file, Dwp_output_file* output_file) { elfcpp::Ehdr ehdr(p); Sized_relobj_dwo* obj = new Sized_relobj_dwo(this->name_, input_file, ehdr); obj->setup(); output_file->record_target_info( this->name_, ehdr.get_e_machine(), size, big_endian, ehdr.get_e_ident()[elfcpp::EI_OSABI], ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]); return obj; } // Read the .debug_cu_index section of a .dwp file, // and process the CU sets. void Dwo_file::read_compunit_index(unsigned int shndx, Dwp_output_file* output_file) { if (this->obj_->is_big_endian()) this->sized_read_compunit_index(shndx, output_file); else this->sized_read_compunit_index(shndx, output_file); } template void Dwo_file::sized_read_compunit_index(unsigned int shndx, Dwp_output_file* output_file) { section_size_type len; bool is_new; const unsigned char* contents = this->section_contents(shndx, &len, &is_new); unsigned int version = elfcpp::Swap_unaligned<32, big_endian>::readval(contents); if (version != 1) gold_fatal(_("%s: .debug_cu_index has unsupported version number %d"), this->name_, version); unsigned int nused = elfcpp::Swap_unaligned<32, big_endian>::readval(contents + 2 * sizeof(uint32_t)); if (nused == 0) return; unsigned int nslots = elfcpp::Swap_unaligned<32, big_endian>::readval(contents + 3 * sizeof(uint32_t)); const unsigned char* phash = contents + 4 * sizeof(uint32_t); const unsigned char* pindex = phash + nslots * sizeof(uint64_t); const unsigned char* shndx_pool = pindex + nslots * sizeof(uint32_t); const unsigned char* limit = contents + len; if (shndx_pool >= limit) gold_fatal(_("%s: .debug_cu_index is corrupt"), this->name_); // Loop over the slots of the hash table. for (unsigned int i = 0; i < nslots; ++i) { uint64_t dwo_id = elfcpp::Swap_unaligned<64, big_endian>::readval(phash); if (dwo_id != 0) { unsigned int index = elfcpp::Swap_unaligned<32, big_endian>::readval(pindex); const unsigned char* shndx_list = shndx_pool + index * sizeof(uint32_t); // Collect the debug sections for this compilation unit set. unsigned int debug_info = 0; unsigned int debug_abbrev = 0; unsigned int debug_line = 0; unsigned int debug_loc = 0; unsigned int debug_str_offsets = 0; unsigned int debug_macinfo = 0; unsigned int debug_macro = 0; for (;;) { if (shndx_list >= limit) gold_fatal(_("%s: .debug_cu_index is corrupt"), this->name_); unsigned int shndx = elfcpp::Swap_unaligned<32, big_endian>::readval(shndx_list); if (shndx == 0) break; if (shndx > this->shnum()) gold_fatal(_("%s: .debug_cu_index has bad shndx"), this->name_); std::string sect_name = this->section_name(shndx); const char* suffix = sect_name.c_str(); if (is_prefix_of(".debug_", suffix)) suffix += 7; else if (is_prefix_of(".zdebug_", suffix)) suffix += 8; else gold_fatal(_("%s: .debug_cu_index refers to " "non-debug section"), this->name_); if (strcmp(suffix, "info.dwo") == 0) debug_info = shndx; else if (strcmp(suffix, "abbrev.dwo") == 0) debug_abbrev = shndx; else if (strcmp(suffix, "line.dwo") == 0) debug_line = shndx; else if (strcmp(suffix, "loc.dwo") == 0) debug_loc = shndx; else if (strcmp(suffix, "str_offsets.dwo") == 0) debug_str_offsets = shndx; else if (strcmp(suffix, "macinfo.dwo") == 0) debug_macinfo = shndx; else if (strcmp(suffix, "macro.dwo") == 0) debug_macro = shndx; shndx_list += sizeof(uint32_t); } this->add_cu_set(output_file, dwo_id, debug_info, debug_abbrev, debug_line, debug_loc, debug_str_offsets, debug_macinfo, debug_macro); } phash += sizeof(uint64_t); pindex += sizeof(uint32_t); } if (is_new) delete[] contents; } // Read the .debug_tu_index section of a .dwp file, // and process the TU sets. void Dwo_file::read_typeunit_index(unsigned int shndx, Dwp_output_file* output_file) { if (this->obj_->is_big_endian()) this->sized_read_typeunit_index(shndx, output_file); else this->sized_read_typeunit_index(shndx, output_file); } template void Dwo_file::sized_read_typeunit_index(unsigned int shndx, Dwp_output_file* output_file) { section_size_type len; bool is_new; const unsigned char* contents = this->section_contents(shndx, &len, &is_new); unsigned int version = elfcpp::Swap_unaligned<32, big_endian>::readval(contents); if (version != 1) gold_fatal(_("%s: .debug_tu_index has unsupported version number %d"), this->name_, version); unsigned int nused = elfcpp::Swap_unaligned<32, big_endian>::readval(contents + 2 * sizeof(uint32_t)); if (nused == 0) return; unsigned int nslots = elfcpp::Swap_unaligned<32, big_endian>::readval(contents + 3 * sizeof(uint32_t)); const unsigned char* phash = contents + 4 * sizeof(uint32_t); const unsigned char* pindex = phash + nslots * sizeof(uint64_t); const unsigned char* shndx_pool = pindex + nslots * sizeof(uint32_t); const unsigned char* limit = contents + len; if (shndx_pool >= limit) gold_fatal(_("%s: .debug_tu_index is corrupt"), this->name_); // Loop over the slots of the hash table. for (unsigned int i = 0; i < nslots; ++i) { uint64_t type_sig = elfcpp::Swap_unaligned<64, big_endian>::readval(phash); if (type_sig != 0) { unsigned int index = elfcpp::Swap_unaligned<32, big_endian>::readval(pindex); const unsigned char* shndx_list = shndx_pool + index * sizeof(uint32_t); // Collect the debug sections for this type unit set. unsigned int debug_types = 0; unsigned int debug_abbrev = 0; unsigned int debug_line = 0; unsigned int debug_str_offsets = 0; for (;;) { if (shndx_list >= limit) gold_fatal(_("%s: .debug_tu_index is corrupt"), this->name_); unsigned int shndx = elfcpp::Swap_unaligned<32, big_endian>::readval(shndx_list); if (shndx == 0) break; if (shndx > this->shnum()) gold_fatal(_("%s: .debug_tu_index has bad shndx"), this->name_); std::string sect_name = this->section_name(shndx); const char* suffix = sect_name.c_str(); if (is_prefix_of(".debug_", suffix)) suffix += 7; else if (is_prefix_of(".zdebug_", suffix)) suffix += 8; else gold_fatal(_("%s: .debug_tu_index refers to " "non-debug section"), this->name_); if (strcmp(suffix, "types.dwo") == 0) debug_types = shndx; else if (strcmp(suffix, "abbrev.dwo") == 0) debug_abbrev = shndx; else if (strcmp(suffix, "line.dwo") == 0) debug_line = shndx; else if (strcmp(suffix, "str_offsets.dwo") == 0) debug_str_offsets = shndx; shndx_list += sizeof(uint32_t); } this->add_tu_set(output_file, type_sig, debug_types, debug_abbrev, debug_line, debug_str_offsets); } phash += sizeof(uint64_t); pindex += sizeof(uint32_t); } if (is_new) delete[] contents; } // Merge the input string table section into the output file. void Dwo_file::add_strings(Dwp_output_file* output_file, unsigned int debug_str) { section_size_type len; bool is_new; const unsigned char* pdata = this->section_contents(debug_str, &len, &is_new); const char* p = reinterpret_cast(pdata); const char* pend = p + len; // Check that the last string is null terminated. if (pend[-1] != '\0') gold_fatal(_("%s: last entry in string section '%s' " "is not null terminated"), this->name_, this->section_name(debug_str).c_str()); // Count the number of strings in the section, and size the map. size_t count = 0; for (const char* pt = p; pt < pend; pt += strlen(pt) + 1) ++count; this->str_offset_map_.reserve(count + 1); // Add the strings to the output string table, and record the new offsets // in the map. section_offset_type i = 0; section_offset_type new_offset; while (p < pend) { size_t len = strlen(p); new_offset = output_file->add_string(p, len); this->str_offset_map_.push_back(std::make_pair(i, new_offset)); p += len + 1; i += len + 1; } new_offset = 0; this->str_offset_map_.push_back(std::make_pair(i, new_offset)); if (is_new) delete[] pdata; } // Copy a section from the input file to the output file. // If IS_STR_OFFSETS is true, remap the string offsets for the // output string table. unsigned int Dwo_file::copy_section(Dwp_output_file* output_file, unsigned int shndx, const char* section_name, bool is_str_offsets) { // Some sections may be referenced from more than one set. // Don't copy a section more than once. if (this->shndx_map_[shndx] > 0) return this->shndx_map_[shndx]; section_size_type len; bool is_new; const unsigned char* contents = this->section_contents(shndx, &len, &is_new); if (is_str_offsets) { const unsigned char* remapped = this->remap_str_offsets(contents, len); if (is_new) delete[] contents; contents = remapped; is_new = true; } this->shndx_map_[shndx] = output_file->add_section(section_name, contents, len, 1); if (is_new) delete[] contents; return this->shndx_map_[shndx]; } // Remap the const unsigned char* Dwo_file::remap_str_offsets(const unsigned char* contents, section_size_type len) { if ((len & 3) != 0) gold_fatal(_("%s: .debug_str_offsets.dwo section size not a multiple of 4"), this->name_); if (this->obj_->is_big_endian()) return this->sized_remap_str_offsets(contents, len); else return this->sized_remap_str_offsets(contents, len); } template const unsigned char* Dwo_file::sized_remap_str_offsets(const unsigned char* contents, section_size_type len) { unsigned char* remapped = new unsigned char[len]; const unsigned char* p = contents; unsigned char* q = remapped; while (len > 0) { unsigned int val = elfcpp::Swap_unaligned<32, big_endian>::readval(p); val = this->remap_str_offset(val); elfcpp::Swap_unaligned<32, big_endian>::writeval(q, val); len -= 4; p += 4; q += 4; } return remapped; } unsigned int Dwo_file::remap_str_offset(section_offset_type val) { Str_offset_map_entry entry; entry.first = val; Str_offset_map::const_iterator p = std::lower_bound(this->str_offset_map_.begin(), this->str_offset_map_.end(), entry, Offset_compare()); if (p == this->str_offset_map_.end() || p->first > val) { if (p == this->str_offset_map_.begin()) return 0; --p; gold_assert(p->first <= val); } return p->second + (val - p->first); } // Add a set of .debug_info and related sections to OUTPUT_FILE. void Dwo_file::add_cu_set(Dwp_output_file* output_file, uint64_t dwo_id, unsigned int debug_info, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_loc, unsigned int debug_str_offsets, unsigned int debug_macinfo, unsigned int debug_macro) { if (debug_info == 0) gold_fatal(_("%s: no .debug_info.dwo section found"), this->name_); if (debug_abbrev == 0) gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_); debug_abbrev = this->copy_section(output_file, debug_abbrev, ".debug_abbrev.dwo", false); if (debug_line > 0) debug_line = this->copy_section(output_file, debug_line, ".debug_line.dwo", false); if (debug_loc > 0) debug_loc = this->copy_section(output_file, debug_loc, ".debug_loc.dwo", false); if (debug_macinfo > 0) debug_macinfo = this->copy_section(output_file, debug_macinfo, ".debug_macinfo.dwo", false); if (debug_macro > 0) debug_macro = this->copy_section(output_file, debug_macro, ".debug_macro.dwo", false); if (debug_str_offsets > 0) debug_str_offsets = this->copy_section(output_file, debug_str_offsets, ".debug_str_offsets.dwo", true); debug_info = this->copy_section(output_file, debug_info, ".debug_info.dwo", false); output_file->add_cu_set(dwo_id, debug_info, debug_abbrev, debug_line, debug_loc, debug_str_offsets, debug_macinfo, debug_macro); } // Add a set of .debug_types and related sections to OUTPUT_FILE. void Dwo_file::add_tu_set(Dwp_output_file* output_file, uint64_t type_sig, unsigned int debug_types, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_str_offsets) { if (debug_types == 0) gold_fatal(_("%s: no .debug_types.dwo section found"), this->name_); if (debug_abbrev == 0) gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_); // Ignore duplicate type signatures. if (output_file->lookup_tu(type_sig)) return; debug_abbrev = this->copy_section(output_file, debug_abbrev, ".debug_abbrev.dwo", false); if (debug_line > 0) debug_line = this->copy_section(output_file, debug_line, ".debug_line.dwo", false); if (debug_str_offsets > 0) debug_str_offsets = this->copy_section(output_file, debug_str_offsets, ".debug_str_offsets.dwo", true); debug_types = this->copy_section(output_file, debug_types, ".debug_types.dwo", false); output_file->add_tu_set(type_sig, debug_types, debug_abbrev, debug_line, debug_str_offsets); } // Class Dwp_output_file. // Record the target info from an input file. On first call, we // set the ELF header values for the output file. On subsequent // calls, we just verify that the values match. void Dwp_output_file::record_target_info(const char*, int machine, int size, bool big_endian, int osabi, int abiversion) { // TODO: Check the values on subsequent calls. if (this->size_ > 0) return; this->machine_ = machine; this->size_ = size; this->big_endian_ = big_endian; this->osabi_ = osabi; this->abiversion_ = abiversion; if (size == 32) this->next_file_offset_ = elfcpp::Elf_sizes<32>::ehdr_size; else if (size == 64) this->next_file_offset_ = elfcpp::Elf_sizes<64>::ehdr_size; else gold_unreachable(); this->fd_ = ::fopen(this->name_, "wb"); if (this->fd_ == NULL) gold_fatal(_("%s: %s"), this->name_, strerror(errno)); // Write zeroes for the ELF header initially. We'll write // the actual header during finalize(). static const char buf[elfcpp::Elf_sizes<64>::ehdr_size] = { 0 }; if (::fwrite(buf, 1, this->next_file_offset_, this->fd_) < (size_t) this->next_file_offset_) gold_fatal(_("%s: %s"), this->name_, strerror(errno)); } // Add a string to the debug strings section. section_offset_type Dwp_output_file::add_string(const char* str, size_t len) { Stringpool::Key key; this->stringpool_.add_with_length(str, len, true, &key); this->have_strings_ = true; // We aren't supposed to call get_offset() until after // calling set_string_offsets(), but the offsets will // not change unless optimizing the string pool. return this->stringpool_.get_offset_from_key(key); } // Align the file offset to the given boundary. static inline off_t align_offset(off_t off, int align) { return (off + align - 1) & ~(align - 1); } // Add a section to the output file, and return the new section index. unsigned int Dwp_output_file::add_section(const char* section_name, const unsigned char* contents, section_size_type len, int align) { off_t file_offset = this->next_file_offset_; gold_assert(this->size_ > 0 && file_offset > 0); file_offset = align_offset(file_offset, align); ::fseek(this->fd_, file_offset, SEEK_SET); if (::fwrite(contents, 1, len, this->fd_) < len) gold_fatal(_("%s: error writing section '%s'"), this->name_, section_name); section_name = this->shstrtab_.add_with_length(section_name, strlen(section_name), false, NULL); Section sect = { section_name, file_offset, len, align }; this->sections_.push_back(sect); this->next_file_offset_ = file_offset + len; return this->shnum_++; } // Add a set of .debug_info and related sections to the output file. void Dwp_output_file::add_cu_set(uint64_t dwo_id, unsigned int debug_info, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_loc, unsigned int debug_str_offsets, unsigned int debug_macinfo, unsigned int debug_macro) { Cu_or_tu_set cu_set = { dwo_id, debug_info, debug_abbrev, debug_line, debug_loc, debug_str_offsets, debug_macinfo, debug_macro }; unsigned int slot; this->cu_index_.find_or_add(dwo_id, &slot); this->cu_index_.enter_set(slot, cu_set); } // Lookup a type signature and return TRUE if we have already seen it. bool Dwp_output_file::lookup_tu(uint64_t type_sig) { this->last_type_sig_ = type_sig; return this->tu_index_.find_or_add(type_sig, &this->last_tu_slot_); } // Add a set of .debug_types and related sections to the output file. void Dwp_output_file::add_tu_set(uint64_t type_sig, unsigned int debug_types, unsigned int debug_abbrev, unsigned int debug_line, unsigned int debug_str_offsets) { Cu_or_tu_set tu_set = { type_sig, debug_types, debug_abbrev, debug_line, 0, debug_str_offsets, 0, 0 }; unsigned int slot; if (type_sig == this->last_type_sig_) slot = this->last_tu_slot_; else this->tu_index_.find_or_add(type_sig, &slot); this->tu_index_.enter_set(slot, tu_set); } // Find a slot in the hash table for SIGNATURE. Return TRUE // if the entry already exists. bool Dwp_output_file::Dwp_index::find_or_add(uint64_t signature, unsigned int* slotp) { if (this->capacity_ == 0) this->initialize(); unsigned int slot = static_cast(signature) & (this->capacity_ - 1); unsigned int secondary_hash; uint64_t probe = this->hash_table_[slot]; if (probe != 0 && probe != signature) { secondary_hash = (static_cast(signature >> 32) & (this->capacity_ - 1)) | 1; do { slot = (slot + secondary_hash) & (this->capacity_ - 1); probe = this->hash_table_[slot]; } while (probe != 0 && probe != signature); } *slotp = slot; return (probe != 0); } // Enter a CU or TU set at the given SLOT in the hash table. void Dwp_output_file::Dwp_index::enter_set(unsigned int slot, const Cu_or_tu_set& set) { gold_assert(slot < this->capacity_); gold_assert(set.debug_info_or_types > 0); gold_assert(set.debug_abbrev > 0); // Add the section indexes to the pool. uint32_t pool_index = this->shndx_pool_.size(); this->shndx_pool_.push_back(set.debug_info_or_types); this->shndx_pool_.push_back(set.debug_abbrev); if (set.debug_line > 0) this->shndx_pool_.push_back(set.debug_line); if (set.debug_loc > 0) this->shndx_pool_.push_back(set.debug_loc); if (set.debug_str_offsets > 0) this->shndx_pool_.push_back(set.debug_str_offsets); if (set.debug_macinfo > 0) this->shndx_pool_.push_back(set.debug_macinfo); if (set.debug_macro > 0) this->shndx_pool_.push_back(set.debug_macro); this->shndx_pool_.push_back(0); // Enter the signature and pool index into the hash table. this->hash_table_[slot] = set.signature; this->index_table_[slot] = pool_index; ++this->used_; // Grow the hash table when we exceed 2/3 capacity. if (this->used_ * 3 > this->capacity_ * 2) this->grow(); } // Initialize the hash table. void Dwp_output_file::Dwp_index::initialize() { this->capacity_ = 16; this->hash_table_ = new uint64_t[this->capacity_]; memset(this->hash_table_, 0, this->capacity_ * sizeof(uint64_t)); this->index_table_ = new uint32_t[this->capacity_]; memset(this->index_table_, 0, this->capacity_ * sizeof(uint32_t)); } // Grow the hash table when we reach 2/3 capacity. void Dwp_output_file::Dwp_index::grow() { unsigned int old_capacity = this->capacity_; uint64_t* old_hash_table = this->hash_table_; uint32_t* old_index_table = this->index_table_; unsigned int old_used = this->used_; this->capacity_ = old_capacity * 2; this->hash_table_ = new uint64_t[this->capacity_]; memset(this->hash_table_, 0, this->capacity_ * sizeof(uint64_t)); this->index_table_ = new uint32_t[this->capacity_]; memset(this->index_table_, 0, this->capacity_ * sizeof(uint32_t)); this->used_ = 0; for (unsigned int i = 0; i < old_capacity; ++i) { uint64_t signature = old_hash_table[i]; if (signature != 0) { unsigned int slot; bool found = this->find_or_add(signature, &slot); gold_assert(!found); this->hash_table_[slot] = signature; this->index_table_[slot] = old_index_table[i]; ++this->used_; } } gold_assert(this->used_ == old_used); delete[] old_hash_table; delete[] old_index_table; } // Initialize the output file. void Dwp_output_file::initialize() { // We can't initialize the output file until we've recorded the // target info from the first input file. gold_assert(this->size_ > 0); } // Finalize the file, write the string tables and index sections, // and close the file. void Dwp_output_file::finalize() { unsigned char* buf; // Write the debug string table. if (this->have_strings_) { this->stringpool_.set_string_offsets(); section_size_type len = this->stringpool_.get_strtab_size(); buf = new unsigned char[len]; this->stringpool_.write_to_buffer(buf, len); this->add_section(".debug_str.dwo", buf, len, 1); delete[] buf; } // Write the CU and TU indexes. if (this->big_endian_) { this->write_index(".debug_cu_index", this->cu_index_); this->write_index(".debug_tu_index", this->tu_index_); } else { this->write_index(".debug_cu_index", this->cu_index_); this->write_index(".debug_tu_index", this->tu_index_); } off_t file_offset = this->next_file_offset_; // Write the section string table. this->shstrndx_ = this->shnum_++; const char* shstrtab_name = this->shstrtab_.add_with_length(".shstrtab", sizeof(".shstrtab") - 1, false, NULL); this->shstrtab_.set_string_offsets(); section_size_type shstrtab_len = this->shstrtab_.get_strtab_size(); buf = new unsigned char[shstrtab_len]; this->shstrtab_.write_to_buffer(buf, shstrtab_len); off_t shstrtab_off = file_offset; ::fseek(this->fd_, file_offset, 0); if (::fwrite(buf, 1, shstrtab_len, this->fd_) < shstrtab_len) gold_fatal(_("%s: error writing section '.shstrtab'"), this->name_); delete[] buf; file_offset += shstrtab_len; // Write the section header table. The first entry is a NULL entry. // This is followed by the debug sections, and finally we write the // .shstrtab section header. file_offset = align_offset(file_offset, this->size_ == 32 ? 4 : 8); this->shoff_ = file_offset; ::fseek(this->fd_, file_offset, 0); section_size_type sh0_size = 0; unsigned int sh0_link = 0; if (this->shnum_ >= elfcpp::SHN_LORESERVE) sh0_size = this->shnum_; if (this->shstrndx_ >= elfcpp::SHN_LORESERVE) sh0_link = this->shstrndx_; this->write_shdr(NULL, 0, 0, 0, 0, sh0_size, sh0_link, 0, 0, 0); for (unsigned int i = 0; i < this->sections_.size(); ++i) { Section& sect = this->sections_[i]; this->write_shdr(sect.name, elfcpp::SHT_PROGBITS, 0, 0, sect.offset, sect.size, 0, 0, sect.align, 0); } this->write_shdr(shstrtab_name, elfcpp::SHT_STRTAB, 0, 0, shstrtab_off, shstrtab_len, 0, 0, 1, 0); // Write the ELF header. this->write_ehdr(); // Close the file. if (this->fd_ != NULL) { if (::fclose(this->fd_) != 0) gold_fatal(_("%s: %s"), this->name_, strerror(errno)); } this->fd_ = NULL; } // Write a CU or TU index section. template void Dwp_output_file::write_index(const char* sect_name, const Dwp_index& index) { const unsigned int nslots = index.hash_table_total_slots(); const unsigned int nused = index.hash_table_used_slots(); const unsigned int npool = index.shndx_pool_size(); const section_size_type index_size = (4 * sizeof(uint32_t) + nslots * sizeof(uint64_t) + nslots * sizeof(uint32_t) + npool * sizeof(uint32_t)); // Allocate a buffer for the section contents. unsigned char* buf = new unsigned char[index_size]; unsigned char* p = buf; // Write the section header: version number, padding, // number of used slots and total number of slots. elfcpp::Swap_unaligned<32, big_endian>::writeval(p, 1); p += sizeof(uint32_t); elfcpp::Swap_unaligned<32, big_endian>::writeval(p, 0); p += sizeof(uint32_t); elfcpp::Swap_unaligned<32, big_endian>::writeval(p, nused); p += sizeof(uint32_t); elfcpp::Swap_unaligned<32, big_endian>::writeval(p, nslots); p += sizeof(uint32_t); // Write the hash table. for (unsigned int i = 0; i < nslots; ++i) { elfcpp::Swap_unaligned<64, big_endian>::writeval(p, index.hash_table(i)); p += sizeof(uint64_t); } // Write the parallel index table. for (unsigned int i = 0; i < nslots; ++i) { elfcpp::Swap_unaligned<32, big_endian>::writeval(p, index.index_table(i)); p += sizeof(uint32_t); } // Write the section index pool. Dwp_index::Shndx_pool::const_iterator pool = index.shndx_pool(); for (unsigned int i = 0; i < npool; ++i) { gold_assert(pool != index.shndx_pool_end()); elfcpp::Swap_unaligned<32, big_endian>::writeval(p, *pool); p += sizeof(uint32_t); ++pool; } gold_assert(p == buf + index_size); this->add_section(sect_name, buf, index_size, sizeof(uint64_t)); delete[] buf; } // Write the ELF header. void Dwp_output_file::write_ehdr() { if (this->size_ == 32) { if (this->big_endian_) return this->sized_write_ehdr<32, true>(); else return this->sized_write_ehdr<32, false>(); } else if (this->size_ == 64) { if (this->big_endian_) return this->sized_write_ehdr<64, true>(); else return this->sized_write_ehdr<64, false>(); } else gold_unreachable(); } template void Dwp_output_file::sized_write_ehdr() { const unsigned int ehdr_size = elfcpp::Elf_sizes::ehdr_size; unsigned char buf[ehdr_size]; elfcpp::Ehdr_write ehdr(buf); unsigned char e_ident[elfcpp::EI_NIDENT]; memset(e_ident, 0, elfcpp::EI_NIDENT); e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; if (size == 32) e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; else if (size == 64) e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; else gold_unreachable(); e_ident[elfcpp::EI_DATA] = (big_endian ? elfcpp::ELFDATA2MSB : elfcpp::ELFDATA2LSB); e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; ehdr.put_e_ident(e_ident); ehdr.put_e_type(elfcpp::ET_REL); ehdr.put_e_machine(this->machine_); ehdr.put_e_version(elfcpp::EV_CURRENT); ehdr.put_e_entry(0); ehdr.put_e_phoff(0); ehdr.put_e_shoff(this->shoff_); ehdr.put_e_flags(0); ehdr.put_e_ehsize(elfcpp::Elf_sizes::ehdr_size); ehdr.put_e_phentsize(0); ehdr.put_e_phnum(0); ehdr.put_e_shentsize(elfcpp::Elf_sizes::shdr_size); ehdr.put_e_shnum(this->shnum_ < elfcpp::SHN_LORESERVE ? this->shnum_ : 0); ehdr.put_e_shstrndx(this->shstrndx_ < elfcpp::SHN_LORESERVE ? this->shstrndx_ : static_cast(elfcpp::SHN_XINDEX)); ::fseek(this->fd_, 0, 0); if (::fwrite(buf, 1, ehdr_size, this->fd_) < ehdr_size) gold_fatal(_("%s: error writing ELF header"), this->name_); } // Write a section header. void Dwp_output_file::write_shdr(const char* name, unsigned int type, unsigned int flags, uint64_t addr, off_t offset, section_size_type sect_size, unsigned int link, unsigned int info, unsigned int align, unsigned int ent_size) { if (this->size_ == 32) { if (this->big_endian_) return this->sized_write_shdr<32, true>(name, type, flags, addr, offset, sect_size, link, info, align, ent_size); else return this->sized_write_shdr<32, false>(name, type, flags, addr, offset, sect_size, link, info, align, ent_size); } else if (this->size_ == 64) { if (this->big_endian_) return this->sized_write_shdr<64, true>(name, type, flags, addr, offset, sect_size, link, info, align, ent_size); else return this->sized_write_shdr<64, false>(name, type, flags, addr, offset, sect_size, link, info, align, ent_size); } else gold_unreachable(); } template void Dwp_output_file::sized_write_shdr(const char* name, unsigned int type, unsigned int flags, uint64_t addr, off_t offset, section_size_type sect_size, unsigned int link, unsigned int info, unsigned int align, unsigned int ent_size) { const unsigned int shdr_size = elfcpp::Elf_sizes::shdr_size; unsigned char buf[shdr_size]; elfcpp::Shdr_write shdr(buf); shdr.put_sh_name(name == NULL ? 0 : this->shstrtab_.get_offset(name)); shdr.put_sh_type(type); shdr.put_sh_flags(flags); shdr.put_sh_addr(addr); shdr.put_sh_offset(offset); shdr.put_sh_size(sect_size); shdr.put_sh_link(link); shdr.put_sh_info(info); shdr.put_sh_addralign(align); shdr.put_sh_entsize(ent_size); if (::fwrite(buf, 1, shdr_size, this->fd_) < shdr_size) gold_fatal(_("%s: error writing section header table"), this->name_); } // Class Dwo_id_info_reader. // Visit a compilation unit. void Dwo_id_info_reader::visit_compilation_unit(off_t, off_t, Dwarf_die* die) { this->dwo_id_ = die->uint_attribute(elfcpp::DW_AT_GNU_dwo_id); if (this->dwo_id_ != 0) this->dwo_id_found_ = true; } // Visit a type unit. void Dwo_id_info_reader::visit_type_unit(off_t, off_t, uint64_t signature, Dwarf_die*) { this->type_sig_ = signature; this->type_sig_found_ = true; } }; // End namespace gold using namespace gold; // Options. struct option dwp_options[] = { { "verbose", no_argument, NULL, 'v' }, { "output", required_argument, NULL, 'o' }, { NULL, 0, NULL, 0 } }; // Print usage message and exit. static void usage() { fprintf(stderr, _("Usage: %s [options] file...\n"), program_name); fprintf(stderr, _(" -v, --verbose Verbose output\n")); fprintf(stderr, _(" -o FILE, --output FILE Set output dwp file name" " (required)\n")); exit(1); } // Main program. int main(int argc, char** argv) { #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale(LC_MESSAGES, ""); #endif #if defined (HAVE_SETLOCALE) setlocale(LC_CTYPE, ""); #endif bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); program_name = argv[0]; // Initialize the global parameters, to let random code get to the // errors object. Errors errors(program_name); set_parameters_errors(&errors); // Initialize gold's global options. We don't use these in // this program, but they need to be initialized so that // functions we call from libgold work properly. General_options options; set_parameters_options(&options); // In libiberty; expands @filename to the args in "filename". expandargv(&argc, &argv); // Collect file names and options. typedef std::vector File_list; File_list files; const char* output_filename = NULL; bool verbose = false; int c; while ((c = getopt_long(argc, argv, "vo:", dwp_options, NULL)) != -1) { switch (c) { case 'v': verbose = true; break; case 'o': output_filename = optarg; break; case '?': default: usage(); } } for (int i = optind; i < argc; ++i) files.push_back(argv[i]); if (files.empty()) gold_fatal(_("no input files")); if (output_filename == NULL) gold_fatal(_("no output file specified")); Dwp_output_file output_file(output_filename); // Process each file, adding its contents to the output file. for (File_list::const_iterator f = files.begin(); f != files.end(); ++f) { if (verbose) fprintf(stderr, "%s\n", *f); Dwo_file dwo_file(*f); dwo_file.read(&output_file); } output_file.finalize(); return EXIT_SUCCESS; }