| // dwp.cc -- DWARF packaging utility |
| |
| // Copyright (C) 2012-2024 Free Software Foundation, Inc. |
| // Written by Cary Coutant <ccoutant@google.com>. |
| |
| // 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 <cstdarg> |
| #include <cstddef> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <cstring> |
| #include <cerrno> |
| |
| #include <vector> |
| #include <algorithm> |
| |
| #include "getopt.h" |
| #include "libiberty.h" |
| #include "../bfd/bfdver.h" |
| |
| #include "elfcpp.h" |
| #include "elfcpp_file.h" |
| #include "dwarf.h" |
| #include "dirsearch.h" |
| #include "fileread.h" |
| #include "object.h" |
| #include "compressed_output.h" |
| #include "stringpool.h" |
| #include "dwarf_reader.h" |
| |
| static void |
| usage(FILE* fd, int) ATTRIBUTE_NORETURN; |
| |
| static void |
| print_version() ATTRIBUTE_NORETURN; |
| |
| namespace gold { |
| |
| class Dwp_output_file; |
| |
| template <int size, bool big_endian> |
| class Sized_relobj_dwo; |
| |
| // List of .dwo files to process. |
| struct Dwo_file_entry |
| { |
| Dwo_file_entry(uint64_t id, std::string name) |
| : dwo_id(id), dwo_name(name) |
| { } |
| uint64_t dwo_id; |
| std::string dwo_name; |
| }; |
| typedef std::vector<Dwo_file_entry> File_list; |
| |
| // Type to hold the offset and length of an input section |
| // within an output section. |
| |
| struct Section_bounds |
| { |
| section_offset_type offset; |
| section_size_type size; |
| |
| Section_bounds() |
| : offset(0), size(0) |
| { } |
| |
| Section_bounds(section_offset_type o, section_size_type s) |
| : offset(o), size(s) |
| { } |
| }; |
| |
| // A set of sections for a compilation unit or type unit. |
| |
| struct Unit_set |
| { |
| uint64_t signature; |
| Section_bounds sections[elfcpp::DW_SECT_MAX + 1]; |
| |
| Unit_set() |
| : signature(0), sections() |
| { } |
| }; |
| |
| // An input file. |
| // This class may represent a .dwo file, a .dwp file |
| // produced by an earlier run, or an executable file whose |
| // debug section identifies a set of .dwo files to read. |
| |
| class Dwo_file |
| { |
| public: |
| Dwo_file(const char* name) |
| : name_(name), obj_(NULL), input_file_(NULL), is_compressed_(), |
| sect_offsets_(), str_offset_map_() |
| { } |
| |
| ~Dwo_file(); |
| |
| // Read the input executable file and extract the list of .dwo files |
| // that it references. |
| void |
| read_executable(File_list* files); |
| |
| // Read the input file and send its contents to OUTPUT_FILE. |
| void |
| read(Dwp_output_file* output_file); |
| |
| // Verify a .dwp file given a list of .dwo files referenced by the |
| // corresponding executable file. Returns true if no problems |
| // were found. |
| bool |
| verify(const File_list& files); |
| |
| private: |
| // Types for mapping input string offsets to output string offsets. |
| typedef std::pair<section_offset_type, section_offset_type> |
| Str_offset_map_entry; |
| typedef std::vector<Str_offset_map_entry> 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(Dwp_output_file* output_file); |
| |
| template <int size, bool big_endian> |
| 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 or .debug_tu_index section of a .dwp file, |
| // and process the CU or TU sets. |
| void |
| read_unit_index(unsigned int, unsigned int *, Dwp_output_file*, |
| bool is_tu_index); |
| |
| template <bool big_endian> |
| void |
| sized_read_unit_index(unsigned int, unsigned int *, Dwp_output_file*, |
| bool is_tu_index); |
| |
| // Verify the .debug_cu_index section of a .dwp file, comparing it |
| // against the list of .dwo files referenced by the corresponding |
| // executable file. |
| bool |
| verify_dwo_list(unsigned int, const File_list& files); |
| |
| template <bool big_endian> |
| bool |
| sized_verify_dwo_list(unsigned int, const File_list& files); |
| |
| // 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. |
| Section_bounds |
| copy_section(Dwp_output_file* output_file, unsigned int shndx, |
| elfcpp::DW_SECT section_id); |
| |
| // 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 <bool big_endian> |
| 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.dwo or .debug_types.dwo and related sections |
| // to OUTPUT_FILE. |
| void |
| add_unit_set(Dwp_output_file* output_file, unsigned int *debug_shndx, |
| bool is_debug_types); |
| |
| // 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<bool> is_compressed_; |
| // Map input section index onto output section offset and size. |
| std::vector<Section_bounds> sect_offsets_; |
| // 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 <int size, bool big_endian> |
| class Sized_relobj_dwo : public Sized_relobj<size, big_endian> |
| { |
| public: |
| typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
| typedef typename Sized_relobj<size, big_endian>::Symbols Symbols; |
| |
| Sized_relobj_dwo(const char* name, Input_file* input_file, |
| const elfcpp::Ehdr<size, big_endian>& ehdr) |
| : Sized_relobj<size, big_endian>(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) const |
| { 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); |
| |
| // 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<char>*, |
| Stringpool_template<char>*) |
| { 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<size, big_endian, Object> 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_(), |
| section_id_map_(), shoff_(0), shstrndx_(0), have_strings_(false), |
| stringpool_(), shstrtab_(), cu_index_(), tu_index_(), last_type_sig_(0), |
| last_tu_slot_(0) |
| { |
| this->section_id_map_.resize(elfcpp::DW_SECT_MAX + 1); |
| 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 offset. |
| section_offset_type |
| add_contribution(elfcpp::DW_SECT section_id, 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(Unit_set* cu_set); |
| |
| // 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(Unit_set* tu_set); |
| |
| // Finalize the file, write the string tables and index sections, |
| // and close the file. |
| void |
| finalize(); |
| |
| private: |
| // Contributions to output sections. |
| struct Contribution |
| { |
| section_offset_type output_offset; |
| section_size_type size; |
| const unsigned char* contents; |
| }; |
| |
| // Sections in the output file. |
| struct Section |
| { |
| const char* name; |
| off_t offset; |
| section_size_type size; |
| int align; |
| std::vector<Contribution> contributions; |
| |
| Section(const char* n, int a) |
| : name(n), offset(0), size(0), align(a), contributions() |
| { } |
| }; |
| |
| // The index sections defined by the DWARF Package File Format spec. |
| class Dwp_index |
| { |
| public: |
| // Vector for the section table. |
| typedef std::vector<const Unit_set*> Section_table; |
| |
| Dwp_index() |
| : capacity_(0), used_(0), hash_table_(NULL), section_table_(), |
| section_mask_(0) |
| { } |
| |
| ~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 Unit_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. |
| Section_table::const_iterator |
| section_table() const |
| { return this->section_table_.begin(); } |
| |
| Section_table::const_iterator |
| section_table_end() const |
| { return this->section_table_.end(); } |
| |
| // Return the number of rows in the section table. |
| unsigned int |
| section_table_rows() const |
| { return this->section_table_.size(); } |
| |
| // Return the mask indicating which columns will be used |
| // in the section table. |
| int |
| section_table_cols() const |
| { return this->section_mask_; } |
| |
| 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 table of section offsets and sizes. |
| Section_table section_table_; |
| // Bit mask to indicate which debug sections are present in the file. |
| int section_mask_; |
| }; // End class Dwp_output_file::Dwp_index. |
| |
| // Add a new output section and return the section index. |
| unsigned int |
| add_output_section(const char* section_name, int align); |
| |
| // Write a new section to the output file. |
| void |
| write_new_section(const char* section_name, const unsigned char* contents, |
| section_size_type len, int align); |
| |
| // Write the ELF header. |
| void |
| write_ehdr(); |
| |
| template<unsigned int size, bool big_endian> |
| 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<unsigned int size, bool big_endian> |
| 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 the contributions to an output section. |
| void |
| write_contributions(const Section& sect); |
| |
| // Write a CU or TU index section. |
| template<bool big_endian> |
| 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<Section> sections_; |
| // Section id map. This maps a DW_SECT enum to an shndx. |
| std::vector<unsigned int> section_id_map_; |
| // 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_names from |
| // DWARF CUs. |
| |
| class Dwo_name_info_reader : public Dwarf_info_reader |
| { |
| public: |
| Dwo_name_info_reader(Relobj* object, unsigned int shndx) |
| : Dwarf_info_reader(false, object, NULL, 0, shndx, 0, 0), |
| files_(NULL) |
| { } |
| |
| ~Dwo_name_info_reader() |
| { } |
| |
| // Get the dwo_names from the DWARF compilation unit DIEs. |
| void |
| get_dwo_names(File_list* files) |
| { |
| this->files_ = files; |
| this->parse(); |
| } |
| |
| protected: |
| // Visit a compilation unit. |
| virtual void |
| visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die*); |
| |
| private: |
| // The list of files to populate. |
| File_list* files_; |
| }; |
| |
| // A specialization of Dwarf_info_reader, for reading DWARF CUs and TUs |
| // and adding them to the output file. |
| |
| class Unit_reader : public Dwarf_info_reader |
| { |
| public: |
| Unit_reader(bool is_type_unit, Relobj* object, unsigned int shndx) |
| : Dwarf_info_reader(is_type_unit, object, NULL, 0, shndx, 0, 0), |
| output_file_(NULL), sections_(NULL) |
| { } |
| |
| ~Unit_reader() |
| { } |
| |
| // Read the CUs or TUs and add them to the output file. |
| void |
| add_units(Dwp_output_file*, unsigned int debug_abbrev, Section_bounds*); |
| |
| 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 tu_length, off_t type_offset, |
| uint64_t signature, Dwarf_die*); |
| |
| private: |
| Dwp_output_file* output_file_; |
| Section_bounds* sections_; |
| }; |
| |
| // Return the name of a DWARF .dwo section. |
| |
| static const char* |
| get_dwarf_section_name(elfcpp::DW_SECT section_id) |
| { |
| static const char* dwarf_section_names[] = { |
| NULL, // unused |
| ".debug_info.dwo", // DW_SECT_INFO = 1 |
| ".debug_types.dwo", // DW_SECT_TYPES = 2 |
| ".debug_abbrev.dwo", // DW_SECT_ABBREV = 3 |
| ".debug_line.dwo", // DW_SECT_LINE = 4 |
| ".debug_loc.dwo", // DW_SECT_LOC = 5 |
| ".debug_str_offsets.dwo", // DW_SECT_STR_OFFSETS = 6 |
| ".debug_macinfo.dwo", // DW_SECT_MACINFO = 7 |
| ".debug_macro.dwo", // DW_SECT_MACRO = 8 |
| }; |
| |
| gold_assert(section_id > 0 && section_id <= elfcpp::DW_SECT_MAX); |
| return dwarf_section_names[section_id]; |
| } |
| |
| // Class Sized_relobj_dwo. |
| |
| // Setup the section information. |
| |
| template <int size, bool big_endian> |
| void |
| Sized_relobj_dwo<size, big_endian>::setup() |
| { |
| const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; |
| const off_t shoff = this->elf_file_.shoff(); |
| const unsigned int shnum = this->elf_file_.shnum(); |
| |
| this->set_shnum(shnum); |
| this->section_offsets().resize(shnum); |
| |
| // Read the section headers. |
| const unsigned char* const pshdrs = this->get_view(shoff, shnum * shdr_size, |
| true, false); |
| |
| // Read the section names. |
| const unsigned char* pshdrnames = |
| pshdrs + this->elf_file_.shstrndx() * shdr_size; |
| typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames); |
| if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB) |
| this->error(_("section name section has wrong type: %u"), |
| static_cast<unsigned int>(shdrnames.get_sh_type())); |
| section_size_type section_names_size = |
| convert_to_section_size_type(shdrnames.get_sh_size()); |
| const unsigned char* namesu = this->get_view(shdrnames.get_sh_offset(), |
| section_names_size, false, |
| false); |
| const char* names = reinterpret_cast<const char*>(namesu); |
| |
| Compressed_section_map* compressed_sections = |
| build_compressed_section_map<size, big_endian>( |
| pshdrs, this->shnum(), names, section_names_size, this, true); |
| if (compressed_sections != NULL && !compressed_sections->empty()) |
| this->set_compressed_sections(compressed_sections); |
| } |
| |
| // Return a view of the contents of a section. |
| |
| template <int size, bool big_endian> |
| const unsigned char* |
| Sized_relobj_dwo<size, big_endian>::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); |
| } |
| |
| // Class Dwo_file. |
| |
| Dwo_file::~Dwo_file() |
| { |
| if (this->obj_ != NULL) |
| delete this->obj_; |
| if (this->input_file_ != NULL) |
| delete this->input_file_; |
| } |
| |
| // Read the input executable file and extract the list of .dwo files |
| // that it references. |
| |
| void |
| Dwo_file::read_executable(File_list* files) |
| { |
| this->obj_ = this->make_object(NULL); |
| |
| unsigned int shnum = this->shnum(); |
| this->is_compressed_.resize(shnum); |
| this->sect_offsets_.resize(shnum); |
| |
| unsigned int debug_info = 0; |
| unsigned int debug_abbrev = 0; |
| |
| // Scan the section table and collect the debug sections we need. |
| // (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, "info") == 0) |
| debug_info = i; |
| else if (strcmp(suffix, "abbrev") == 0) |
| debug_abbrev = i; |
| } |
| |
| if (debug_info > 0) |
| { |
| Dwo_name_info_reader dwarf_reader(this->obj_, debug_info); |
| dwarf_reader.set_abbrev_shndx(debug_abbrev); |
| dwarf_reader.get_dwo_names(files); |
| } |
| } |
| |
| // Read the input file and send its contents to OUTPUT_FILE. |
| |
| void |
| Dwo_file::read(Dwp_output_file* output_file) |
| { |
| this->obj_ = this->make_object(output_file); |
| |
| unsigned int shnum = this->shnum(); |
| this->is_compressed_.resize(shnum); |
| this->sect_offsets_.resize(shnum); |
| |
| typedef std::vector<unsigned int> Types_list; |
| Types_list debug_types; |
| unsigned int debug_shndx[elfcpp::DW_SECT_MAX + 1]; |
| for (unsigned int i = 0; i <= elfcpp::DW_SECT_MAX; i++) |
| debug_shndx[i] = 0; |
| unsigned int debug_str = 0; |
| unsigned int debug_cu_index = 0; |
| unsigned int debug_tu_index = 0; |
| |
| // Scan the section table and collect debug 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, "info.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_INFO] = i; |
| else if (strcmp(suffix, "types.dwo") == 0) |
| debug_types.push_back(i); |
| else if (strcmp(suffix, "abbrev.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_ABBREV] = i; |
| else if (strcmp(suffix, "line.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_LINE] = i; |
| else if (strcmp(suffix, "loc.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_LOC] = i; |
| else if (strcmp(suffix, "str.dwo") == 0) |
| debug_str = i; |
| else if (strcmp(suffix, "str_offsets.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_STR_OFFSETS] = i; |
| else if (strcmp(suffix, "macinfo.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_MACINFO] = i; |
| else if (strcmp(suffix, "macro.dwo") == 0) |
| debug_shndx[elfcpp::DW_SECT_MACRO] = i; |
| else if (strcmp(suffix, "cu_index") == 0) |
| debug_cu_index = i; |
| else if (strcmp(suffix, "tu_index") == 0) |
| debug_tu_index = 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_unit_index(debug_cu_index, debug_shndx, output_file, false); |
| if (debug_tu_index > 0) |
| { |
| if (debug_types.size() > 1) |
| gold_fatal(_("%s: .dwp file must have no more than one " |
| ".debug_types.dwo section"), this->name_); |
| if (debug_types.size() == 1) |
| debug_shndx[elfcpp::DW_SECT_TYPES] = debug_types[0]; |
| else |
| debug_shndx[elfcpp::DW_SECT_TYPES] = 0; |
| this->read_unit_index(debug_tu_index, debug_shndx, output_file, true); |
| } |
| return; |
| } |
| |
| // If we found no index sections, this is a .dwo file. |
| if (debug_shndx[elfcpp::DW_SECT_INFO] > 0) |
| this->add_unit_set(output_file, debug_shndx, false); |
| |
| debug_shndx[elfcpp::DW_SECT_INFO] = 0; |
| for (Types_list::const_iterator tp = debug_types.begin(); |
| tp != debug_types.end(); |
| ++tp) |
| { |
| debug_shndx[elfcpp::DW_SECT_TYPES] = *tp; |
| this->add_unit_set(output_file, debug_shndx, true); |
| } |
| } |
| |
| // Verify a .dwp file given a list of .dwo files referenced by the |
| // corresponding executable file. Returns true if no problems |
| // were found. |
| |
| bool |
| Dwo_file::verify(const File_list& files) |
| { |
| this->obj_ = this->make_object(NULL); |
| |
| unsigned int shnum = this->shnum(); |
| this->is_compressed_.resize(shnum); |
| this->sect_offsets_.resize(shnum); |
| |
| unsigned int debug_cu_index = 0; |
| |
| // Scan the section table and collect debug 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; |
| } |
| |
| if (debug_cu_index == 0) |
| gold_fatal(_("%s: no .debug_cu_index section found"), this->name_); |
| |
| return this->verify_dwo_list(debug_cu_index, files); |
| } |
| |
| // Create a Sized_relobj_dwo of the given size and endianness, |
| // and record the target info. |
| |
| Relobj* |
| Dwo_file::make_object(Dwp_output_file* output_file) |
| { |
| // Open the input file. |
| Input_file* input_file = new Input_file(this->name_); |
| this->input_file_ = input_file; |
| Dirsearch dirpath; |
| int index; |
| if (!input_file->open(dirpath, NULL, &index)) |
| gold_fatal(_("%s: can't open"), this->name_); |
| |
| // Check that it's an ELF file. |
| off_t filesize = input_file->file().filesize(); |
| int hdrsize = elfcpp::Elf_recognizer::max_header_size; |
| if (filesize < hdrsize) |
| hdrsize = filesize; |
| const unsigned char* elf_header = |
| input_file->file().get_view(0, 0, hdrsize, true, false); |
| if (!elfcpp::Elf_recognizer::is_elf_file(elf_header, 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(elf_header, hdrsize, &size, |
| &big_endian, &error)) |
| gold_fatal(_("%s: %s"), this->name_, error.c_str()); |
| |
| if (size == 32) |
| { |
| if (big_endian) |
| #ifdef HAVE_TARGET_32_BIG |
| return this->sized_make_object<32, true>(elf_header, input_file, |
| output_file); |
| #else |
| gold_unreachable(); |
| #endif |
| else |
| #ifdef HAVE_TARGET_32_LITTLE |
| return this->sized_make_object<32, false>(elf_header, 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>(elf_header, input_file, |
| output_file); |
| #else |
| gold_unreachable(); |
| #endif |
| else |
| #ifdef HAVE_TARGET_64_LITTLE |
| return this->sized_make_object<64, false>(elf_header, 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 <int size, bool big_endian> |
| Relobj* |
| Dwo_file::sized_make_object(const unsigned char* p, Input_file* input_file, |
| Dwp_output_file* output_file) |
| { |
| elfcpp::Ehdr<size, big_endian> ehdr(p); |
| Sized_relobj_dwo<size, big_endian>* obj = |
| new Sized_relobj_dwo<size, big_endian>(this->name_, input_file, ehdr); |
| obj->setup(); |
| if (output_file != NULL) |
| output_file->record_target_info( |
| this->name_, ehdr.get_e_machine(), size, big_endian, |
| ehdr.get_ei_osabi(), |
| ehdr.get_ei_abiversion()); |
| return obj; |
| } |
| |
| // Read the .debug_cu_index or .debug_tu_index section of a .dwp file, |
| // and process the CU or TU sets. |
| |
| void |
| Dwo_file::read_unit_index(unsigned int shndx, unsigned int *debug_shndx, |
| Dwp_output_file* output_file, bool is_tu_index) |
| { |
| if (this->obj_->is_big_endian()) |
| this->sized_read_unit_index<true>(shndx, debug_shndx, output_file, |
| is_tu_index); |
| else |
| this->sized_read_unit_index<false>(shndx, debug_shndx, output_file, |
| is_tu_index); |
| } |
| |
| template <bool big_endian> |
| void |
| Dwo_file::sized_read_unit_index(unsigned int shndx, |
| unsigned int *debug_shndx, |
| Dwp_output_file* output_file, |
| bool is_tu_index) |
| { |
| elfcpp::DW_SECT info_sect = (is_tu_index |
| ? elfcpp::DW_SECT_TYPES |
| : elfcpp::DW_SECT_INFO); |
| unsigned int info_shndx = debug_shndx[info_sect]; |
| |
| gold_assert(shndx > 0); |
| |
| section_size_type index_len; |
| bool index_is_new; |
| const unsigned char* contents = |
| this->section_contents(shndx, &index_len, &index_is_new); |
| |
| unsigned int version = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents); |
| |
| // We don't support version 1 anymore because it was experimental |
| // and because in normal use, dwp is not expected to read .dwp files |
| // produced by an earlier version of the tool. |
| if (version != 2) |
| gold_fatal(_("%s: section %s has unsupported version number %d"), |
| this->name_, this->section_name(shndx).c_str(), version); |
| |
| unsigned int ncols = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents |
| + sizeof(uint32_t)); |
| unsigned int nused = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents |
| + 2 * sizeof(uint32_t)); |
| if (ncols == 0 || nused == 0) |
| return; |
| |
| gold_assert(info_shndx > 0); |
| |
| 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* pcolhdrs = pindex + nslots * sizeof(uint32_t); |
| const unsigned char* poffsets = pcolhdrs + ncols * sizeof(uint32_t); |
| const unsigned char* psizes = poffsets + nused * ncols * sizeof(uint32_t); |
| const unsigned char* pend = psizes + nused * ncols * sizeof(uint32_t); |
| |
| if (pend > contents + index_len) |
| gold_fatal(_("%s: section %s is corrupt"), this->name_, |
| this->section_name(shndx).c_str()); |
| |
| // Copy the related sections and track the section offsets and sizes. |
| Section_bounds sections[elfcpp::DW_SECT_MAX + 1]; |
| for (int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i) |
| { |
| if (debug_shndx[i] > 0) |
| sections[i] = this->copy_section(output_file, debug_shndx[i], |
| static_cast<elfcpp::DW_SECT>(i)); |
| } |
| |
| // Get the contents of the .debug_info.dwo or .debug_types.dwo section. |
| section_size_type info_len; |
| bool info_is_new; |
| const unsigned char* info_contents = |
| this->section_contents(info_shndx, &info_len, &info_is_new); |
| |
| // Loop over the slots of the hash table. |
| for (unsigned int i = 0; i < nslots; ++i) |
| { |
| uint64_t signature = |
| elfcpp::Swap_unaligned<64, big_endian>::readval(phash); |
| unsigned int index = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(pindex); |
| if (index != 0 && (!is_tu_index || !output_file->lookup_tu(signature))) |
| { |
| Unit_set* unit_set = new Unit_set(); |
| unit_set->signature = signature; |
| const unsigned char* pch = pcolhdrs; |
| const unsigned char* porow = |
| poffsets + (index - 1) * ncols * sizeof(uint32_t); |
| const unsigned char* psrow = |
| psizes + (index - 1) * ncols * sizeof(uint32_t); |
| |
| // Adjust the offset of each contribution within the input section |
| // by the offset of the input section within the output section. |
| for (unsigned int j = 0; j <= ncols; j++) |
| { |
| unsigned int dw_sect = |
| elfcpp::Swap_unaligned<64, big_endian>::readval(pch); |
| unsigned int offset = |
| elfcpp::Swap_unaligned<64, big_endian>::readval(porow); |
| unsigned int size = |
| elfcpp::Swap_unaligned<64, big_endian>::readval(psrow); |
| unit_set->sections[dw_sect].offset = (sections[dw_sect].offset |
| + offset); |
| unit_set->sections[dw_sect].size = size; |
| pch += sizeof(uint32_t); |
| porow += sizeof(uint32_t); |
| psrow += sizeof(uint32_t); |
| } |
| |
| const unsigned char* unit_start = |
| info_contents + unit_set->sections[info_sect].offset; |
| section_size_type unit_length = unit_set->sections[info_sect].size; |
| |
| // Dwp_output_file::add_contribution writes the .debug_info.dwo |
| // section directly to the output file, so we only need to |
| // duplicate contributions for .debug_types.dwo section. |
| if (is_tu_index) |
| { |
| unsigned char *copy = new unsigned char[unit_length]; |
| memcpy(copy, unit_start, unit_length); |
| unit_start = copy; |
| } |
| section_offset_type off = |
| output_file->add_contribution(info_sect, unit_start, |
| unit_length, 1); |
| unit_set->sections[info_sect].offset = off; |
| if (is_tu_index) |
| output_file->add_tu_set(unit_set); |
| else |
| output_file->add_cu_set(unit_set); |
| } |
| phash += sizeof(uint64_t); |
| pindex += sizeof(uint32_t); |
| } |
| |
| if (index_is_new) |
| delete[] contents; |
| if (info_is_new) |
| delete[] info_contents; |
| } |
| |
| // Verify the .debug_cu_index section of a .dwp file, comparing it |
| // against the list of .dwo files referenced by the corresponding |
| // executable file. |
| |
| bool |
| Dwo_file::verify_dwo_list(unsigned int shndx, const File_list& files) |
| { |
| if (this->obj_->is_big_endian()) |
| return this->sized_verify_dwo_list<true>(shndx, files); |
| else |
| return this->sized_verify_dwo_list<false>(shndx, files); |
| } |
| |
| template <bool big_endian> |
| bool |
| Dwo_file::sized_verify_dwo_list(unsigned int shndx, const File_list& files) |
| { |
| gold_assert(shndx > 0); |
| |
| section_size_type index_len; |
| bool index_is_new; |
| const unsigned char* contents = |
| this->section_contents(shndx, &index_len, &index_is_new); |
| |
| unsigned int version = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents); |
| |
| // We don't support version 1 anymore because it was experimental |
| // and because in normal use, dwp is not expected to read .dwp files |
| // produced by an earlier version of the tool. |
| if (version != 2) |
| gold_fatal(_("%s: section %s has unsupported version number %d"), |
| this->name_, this->section_name(shndx).c_str(), version); |
| |
| unsigned int ncols = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents |
| + sizeof(uint32_t)); |
| unsigned int nused = |
| elfcpp::Swap_unaligned<32, big_endian>::readval(contents |
| + 2 * sizeof(uint32_t)); |
| if (ncols == 0 || nused == 0) |
| return true; |
| |
| 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* pcolhdrs = pindex + nslots * sizeof(uint32_t); |
| const unsigned char* poffsets = pcolhdrs + ncols * sizeof(uint32_t); |
| const unsigned char* psizes = poffsets + nused * ncols * sizeof(uint32_t); |
| const unsigned char* pend = psizes + nused * ncols * sizeof(uint32_t); |
| |
| if (pend > contents + index_len) |
| gold_fatal(_("%s: section %s is corrupt"), this->name_, |
| this->section_name(shndx).c_str()); |
| |
| int nmissing = 0; |
| for (File_list::const_iterator f = files.begin(); f != files.end(); ++f) |
| { |
| uint64_t dwo_id = f->dwo_id; |
| unsigned int slot = static_cast<unsigned int>(dwo_id) & (nslots - 1); |
| const unsigned char* ph = phash + slot * sizeof(uint64_t); |
| const unsigned char* pi = pindex + slot * sizeof(uint32_t); |
| uint64_t probe = elfcpp::Swap_unaligned<64, big_endian>::readval(ph); |
| uint32_t row_index = elfcpp::Swap_unaligned<32, big_endian>::readval(pi); |
| if (row_index != 0 && probe != dwo_id) |
| { |
| unsigned int h2 = ((static_cast<unsigned int>(dwo_id >> 32) |
| & (nslots - 1)) | 1); |
| do |
| { |
| slot = (slot + h2) & (nslots - 1); |
| ph = phash + slot * sizeof(uint64_t); |
| pi = pindex + slot * sizeof(uint32_t); |
| probe = elfcpp::Swap_unaligned<64, big_endian>::readval(ph); |
| row_index = elfcpp::Swap_unaligned<32, big_endian>::readval(pi); |
| } while (row_index != 0 && probe != dwo_id); |
| } |
| if (row_index == 0) |
| { |
| printf(_("missing .dwo file: %016llx %s\n"), |
| static_cast<long long>(dwo_id), f->dwo_name.c_str()); |
| ++nmissing; |
| } |
| } |
| |
| gold_info(_("Found %d missing .dwo files"), nmissing); |
| |
| if (index_is_new) |
| delete[] contents; |
| |
| return nmissing == 0; |
| } |
| |
| // 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<const char*>(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. |
| // Return the offset and length of this input section's contribution |
| // in the output section. If copying .debug_str_offsets.dwo, remap |
| // the string offsets for the output string table. |
| |
| Section_bounds |
| Dwo_file::copy_section(Dwp_output_file* output_file, unsigned int shndx, |
| elfcpp::DW_SECT section_id) |
| { |
| // Some sections may be referenced from more than one set. |
| // Don't copy a section more than once. |
| if (this->sect_offsets_[shndx].size > 0) |
| return this->sect_offsets_[shndx]; |
| |
| // Get the section contents. Upon return, if IS_NEW is true, the memory |
| // has been allocated via new; if false, the memory is part of the mapped |
| // input file, and we will need to duplicate it so that it will persist |
| // after we close the input file. |
| section_size_type len; |
| bool is_new; |
| const unsigned char* contents = this->section_contents(shndx, &len, &is_new); |
| |
| if (section_id == elfcpp::DW_SECT_STR_OFFSETS) |
| { |
| const unsigned char* remapped = this->remap_str_offsets(contents, len); |
| if (is_new) |
| delete[] contents; |
| contents = remapped; |
| } |
| else if (!is_new) |
| { |
| unsigned char* copy = new unsigned char[len]; |
| memcpy(copy, contents, len); |
| contents = copy; |
| } |
| |
| // Add the contents of the input section to the output section. |
| // The output file takes ownership of the memory pointed to by CONTENTS. |
| section_offset_type off = output_file->add_contribution(section_id, contents, |
| len, 1); |
| |
| // Store the output section bounds. |
| Section_bounds bounds(off, len); |
| this->sect_offsets_[shndx] = bounds; |
| |
| return bounds; |
| } |
| |
| // 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<true>(contents, len); |
| else |
| return this->sized_remap_str_offsets<false>(contents, len); |
| } |
| |
| template <bool big_endian> |
| 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.dwo or .debug_types.dwo and related sections |
| // to OUTPUT_FILE. |
| |
| void |
| Dwo_file::add_unit_set(Dwp_output_file* output_file, unsigned int *debug_shndx, |
| bool is_debug_types) |
| { |
| unsigned int shndx = (is_debug_types |
| ? debug_shndx[elfcpp::DW_SECT_TYPES] |
| : debug_shndx[elfcpp::DW_SECT_INFO]); |
| |
| gold_assert(shndx != 0); |
| |
| if (debug_shndx[elfcpp::DW_SECT_ABBREV] == 0) |
| gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_); |
| |
| // Copy the related sections and track the section offsets and sizes. |
| Section_bounds sections[elfcpp::DW_SECT_MAX + 1]; |
| for (int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i) |
| { |
| if (debug_shndx[i] > 0) |
| sections[i] = this->copy_section(output_file, debug_shndx[i], |
| static_cast<elfcpp::DW_SECT>(i)); |
| } |
| |
| // Parse the .debug_info or .debug_types section and add each compilation |
| // or type unit to the output file, along with the contributions to the |
| // related sections. |
| Unit_reader reader(is_debug_types, this->obj_, shndx); |
| reader.add_units(output_file, debug_shndx[elfcpp::DW_SECT_ABBREV], sections); |
| } |
| |
| // 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 new output section and return the section index. |
| |
| unsigned int |
| Dwp_output_file::add_output_section(const char* section_name, int align) |
| { |
| Section sect(section_name, align); |
| this->sections_.push_back(sect); |
| return this->shnum_++; |
| } |
| |
| // Add a contribution to a section in the output file, and return the offset |
| // of the contribution within the output section. The .debug_info.dwo section |
| // is expected to be the largest one, so we will write the contents of this |
| // section directly to the output file as we receive contributions, allowing |
| // us to free that memory as soon as possible. We will save the remaining |
| // contributions until we finalize the layout of the output file. |
| |
| section_offset_type |
| Dwp_output_file::add_contribution(elfcpp::DW_SECT section_id, |
| const unsigned char* contents, |
| section_size_type len, |
| int align) |
| { |
| const char* section_name = get_dwarf_section_name(section_id); |
| gold_assert(static_cast<size_t>(section_id) < this->section_id_map_.size()); |
| unsigned int shndx = this->section_id_map_[section_id]; |
| |
| // Create the section if necessary. |
| if (shndx == 0) |
| { |
| section_name = this->shstrtab_.add_with_length(section_name, |
| strlen(section_name), |
| false, NULL); |
| shndx = this->add_output_section(section_name, align); |
| this->section_id_map_[section_id] = shndx; |
| } |
| |
| Section& section = this->sections_[shndx - 1]; |
| |
| section_offset_type section_offset; |
| |
| if (section_id == elfcpp::DW_SECT_INFO) |
| { |
| // Write the .debug_info.dwo section directly. |
| // We do not need to free the memory in this case. |
| off_t file_offset = this->next_file_offset_; |
| gold_assert(this->size_ > 0 && file_offset > 0); |
| |
| file_offset = align_offset(file_offset, align); |
| if (section.offset == 0) |
| section.offset = file_offset; |
| |
| if (align > section.align) |
| { |
| // Since we've already committed to the layout for this |
| // section, an unexpected large alignment boundary may |
| // be impossible to honor. |
| if (align_offset(section.offset, align) != section.offset) |
| gold_fatal(_("%s: alignment (%d) for section '%s' " |
| "cannot be honored"), |
| this->name_, align, section_name); |
| section.align = align; |
| } |
| |
| section_offset = file_offset - section.offset; |
| section.size = file_offset + len - section.offset; |
| |
| ::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); |
| this->next_file_offset_ = file_offset + len; |
| } |
| else |
| { |
| // Collect the contributions and keep track of the total size. |
| if (align > section.align) |
| section.align = align; |
| section_offset = align_offset(section.size, align); |
| section.size = section_offset + len; |
| Contribution contrib = { section_offset, len, contents }; |
| section.contributions.push_back(contrib); |
| } |
| |
| return section_offset; |
| } |
| |
| // Add a set of .debug_info and related sections to the output file. |
| |
| void |
| Dwp_output_file::add_cu_set(Unit_set* cu_set) |
| { |
| uint64_t dwo_id = cu_set->signature; |
| unsigned int slot; |
| if (!this->cu_index_.find_or_add(dwo_id, &slot)) |
| this->cu_index_.enter_set(slot, cu_set); |
| else |
| gold_warning(_("%s: duplicate entry for CU (dwo_id 0x%llx)"), |
| this->name_, (unsigned long long)dwo_id); |
| } |
| |
| // 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(Unit_set* tu_set) |
| { |
| uint64_t type_sig = tu_set->signature; |
| 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<unsigned int>(signature) & (this->capacity_ - 1); |
| unsigned int secondary_hash; |
| uint64_t probe = this->hash_table_[slot]; |
| uint32_t row_index = this->index_table_[slot]; |
| if (row_index != 0 && probe != signature) |
| { |
| secondary_hash = (static_cast<unsigned int>(signature >> 32) |
| & (this->capacity_ - 1)) | 1; |
| do |
| { |
| slot = (slot + secondary_hash) & (this->capacity_ - 1); |
| probe = this->hash_table_[slot]; |
| row_index = this->index_table_[slot]; |
| } while (row_index != 0 && probe != signature); |
| } |
| *slotp = slot; |
| return (row_index != 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 Unit_set* set) |
| { |
| gold_assert(slot < this->capacity_); |
| |
| // Add a row to the offsets and sizes tables. |
| this->section_table_.push_back(set); |
| uint32_t row_index = this->section_table_rows(); |
| |
| // Mark the sections used in this set. |
| for (unsigned int i = 1; i <= elfcpp::DW_SECT_MAX; i++) |
| if (set->sections[i].size > 0) |
| this->section_mask_ |= 1 << i; |
| |
| // Enter the signature and pool index into the hash table. |
| gold_assert(this->hash_table_[slot] == 0); |
| this->hash_table_[slot] = set->signature; |
| this->index_table_[slot] = row_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]; |
| uint32_t row_index = old_index_table[i]; |
| if (row_index != 0) |
| { |
| unsigned int slot; |
| bool found = this->find_or_add(signature, &slot); |
| gold_assert(!found); |
| this->hash_table_[slot] = signature; |
| this->index_table_[slot] = row_index; |
| ++this->used_; |
| } |
| } |
| gold_assert(this->used_ == old_used); |
| |
| delete[] old_hash_table; |
| delete[] old_index_table; |
| } |
| |
| // Finalize the file, write the string tables and index sections, |
| // and close the file. |
| |
| void |
| Dwp_output_file::finalize() |
| { |
| unsigned char* buf; |
| |
| if (this->fd_ == NULL) |
| return; |
| |
| // Write the accumulated output sections. |
| for (unsigned int i = 0; i < this->sections_.size(); i++) |
| { |
| Section& sect = this->sections_[i]; |
| // If the offset has already been assigned, the section has been written. |
| if (sect.offset > 0 || sect.size == 0) |
| continue; |
| off_t file_offset = this->next_file_offset_; |
| file_offset = align_offset(file_offset, sect.align); |
| sect.offset = file_offset; |
| this->write_contributions(sect); |
| this->next_file_offset_ = file_offset + sect.size; |
| } |
| |
| // 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->write_new_section(".debug_str.dwo", buf, len, 1); |
| delete[] buf; |
| } |
| |
| // Write the CU and TU indexes. |
| if (this->big_endian_) |
| { |
| this->write_index<true>(".debug_cu_index", this->cu_index_); |
| this->write_index<true>(".debug_tu_index", this->tu_index_); |
| } |
| else |
| { |
| this->write_index<false>(".debug_cu_index", this->cu_index_); |
| this->write_index<false>(".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 (::fclose(this->fd_) != 0) |
| gold_fatal(_("%s: %s"), this->name_, strerror(errno)); |
| this->fd_ = NULL; |
| } |
| |
| // Write the contributions to an output section. |
| |
| void |
| Dwp_output_file::write_contributions(const Section& sect) |
| { |
| for (unsigned int i = 0; i < sect.contributions.size(); ++i) |
| { |
| const Contribution& c = sect.contributions[i]; |
| ::fseek(this->fd_, sect.offset + c.output_offset, SEEK_SET); |
| if (::fwrite(c.contents, 1, c.size, this->fd_) < c.size) |
| gold_fatal(_("%s: error writing section '%s'"), this->name_, sect.name); |
| delete[] c.contents; |
| } |
| } |
| |
| // Write a new section to the output file. |
| |
| void |
| Dwp_output_file::write_new_section(const char* section_name, |
| const unsigned char* contents, |
| section_size_type len, int align) |
| { |
| section_name = this->shstrtab_.add_with_length(section_name, |
| strlen(section_name), |
| false, NULL); |
| unsigned int shndx = this->add_output_section(section_name, align); |
| Section& section = this->sections_[shndx - 1]; |
| off_t file_offset = this->next_file_offset_; |
| file_offset = align_offset(file_offset, align); |
| section.offset = file_offset; |
| section.size = len; |
| ::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); |
| this->next_file_offset_ = file_offset + len; |
| } |
| |
| // Write a CU or TU index section. |
| |
| template<bool big_endian> |
| 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 nrows = index.section_table_rows(); |
| |
| int column_mask = index.section_table_cols(); |
| unsigned int ncols = 0; |
| for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c) |
| if (column_mask & (1 << c)) |
| ncols++; |
| const unsigned int ntable = (nrows * 2 + 1) * ncols; |
| |
| const section_size_type index_size = (4 * sizeof(uint32_t) |
| + nslots * sizeof(uint64_t) |
| + nslots * sizeof(uint32_t) |
| + ntable * 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, 2); |
| p += sizeof(uint32_t); |
| elfcpp::Swap_unaligned<32, big_endian>::writeval(p, ncols); |
| 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 first row of the table of section offsets. |
| for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c) |
| { |
| if (column_mask & (1 << c)) |
| { |
| elfcpp::Swap_unaligned<32, big_endian>::writeval(p, c); |
| p += sizeof(uint32_t); |
| } |
| } |
| |
| // Write the table of section offsets. |
| Dwp_index::Section_table::const_iterator tbl = index.section_table(); |
| for (unsigned int r = 0; r < nrows; ++r) |
| { |
| gold_assert(tbl != index.section_table_end()); |
| const Section_bounds* sects = (*tbl)->sections; |
| for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c) |
| { |
| if (column_mask & (1 << c)) |
| { |
| section_offset_type offset = sects[c].offset; |
| elfcpp::Swap_unaligned<32, big_endian>::writeval(p, offset); |
| p += sizeof(uint32_t); |
| } |
| else |
| gold_assert(sects[c].size == 0); |
| } |
| ++tbl; |
| } |
| |
| // Write the table of section sizes. |
| tbl = index.section_table(); |
| for (unsigned int r = 0; r < nrows; ++r) |
| { |
| gold_assert(tbl != index.section_table_end()); |
| const Section_bounds* sects = (*tbl)->sections; |
| for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c) |
| { |
| if (column_mask & (1 << c)) |
| { |
| section_size_type size = sects[c].size; |
| elfcpp::Swap_unaligned<32, big_endian>::writeval(p, size); |
| p += sizeof(uint32_t); |
| } |
| else |
| gold_assert(sects[c].size == 0); |
| } |
| ++tbl; |
| } |
| |
| gold_assert(p == buf + index_size); |
| |
| this->write_new_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<unsigned int size, bool big_endian> |
| void |
| Dwp_output_file::sized_write_ehdr() |
| { |
| const unsigned int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; |
| unsigned char buf[ehdr_size]; |
| elfcpp::Ehdr_write<size, big_endian> 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<size>::ehdr_size); |
| ehdr.put_e_phentsize(0); |
| ehdr.put_e_phnum(0); |
| ehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::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<unsigned int>(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<unsigned int size, bool big_endian> |
| 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<size>::shdr_size; |
| unsigned char buf[shdr_size]; |
| elfcpp::Shdr_write<size, big_endian> 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_name_info_reader. |
| |
| // Visit a compilation unit. |
| |
| void |
| Dwo_name_info_reader::visit_compilation_unit(off_t, off_t, Dwarf_die* die) |
| { |
| const char* dwo_name = die->string_attribute(elfcpp::DW_AT_GNU_dwo_name); |
| if (dwo_name != NULL) |
| { |
| uint64_t dwo_id = die->uint_attribute(elfcpp::DW_AT_GNU_dwo_id); |
| this->files_->push_back(Dwo_file_entry(dwo_id, dwo_name)); |
| } |
| } |
| |
| // Class Unit_reader. |
| |
| // Read the CUs or TUs and add them to the output file. |
| |
| void |
| Unit_reader::add_units(Dwp_output_file* output_file, |
| unsigned int debug_abbrev, |
| Section_bounds* sections) |
| { |
| this->output_file_ = output_file; |
| this->sections_ = sections; |
| this->set_abbrev_shndx(debug_abbrev); |
| this->parse(); |
| } |
| |
| // Visit a compilation unit. |
| |
| void |
| Unit_reader::visit_compilation_unit(off_t, off_t cu_length, Dwarf_die* die) |
| { |
| if (cu_length == 0) |
| return; |
| |
| Unit_set* unit_set = new Unit_set(); |
| unit_set->signature = die->uint_attribute(elfcpp::DW_AT_GNU_dwo_id); |
| for (unsigned int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i) |
| unit_set->sections[i] = this->sections_[i]; |
| |
| // Dwp_output_file::add_contribution writes the .debug_info.dwo section |
| // directly to the output file, so we do not need to duplicate the |
| // section contents, and add_contribution does not need to free the memory. |
| section_offset_type off = |
| this->output_file_->add_contribution(elfcpp::DW_SECT_INFO, |
| this->buffer_at_offset(0), |
| cu_length, 1); |
| Section_bounds bounds(off, cu_length); |
| unit_set->sections[elfcpp::DW_SECT_INFO] = bounds; |
| this->output_file_->add_cu_set(unit_set); |
| } |
| |
| // Visit a type unit. |
| |
| void |
| Unit_reader::visit_type_unit(off_t, off_t tu_length, off_t, |
| uint64_t signature, Dwarf_die*) |
| { |
| if (tu_length == 0) |
| return; |
| if (this->output_file_->lookup_tu(signature)) |
| return; |
| |
| Unit_set* unit_set = new Unit_set(); |
| unit_set->signature = signature; |
| for (unsigned int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i) |
| unit_set->sections[i] = this->sections_[i]; |
| |
| unsigned char* contents = new unsigned char[tu_length]; |
| memcpy(contents, this->buffer_at_offset(0), tu_length); |
| section_offset_type off = |
| this->output_file_->add_contribution(elfcpp::DW_SECT_TYPES, contents, |
| tu_length, 1); |
| Section_bounds bounds(off, tu_length); |
| unit_set->sections[elfcpp::DW_SECT_TYPES] = bounds; |
| this->output_file_->add_tu_set(unit_set); |
| } |
| |
| }; // End namespace gold |
| |
| using namespace gold; |
| |
| // Options. |
| |
| enum Dwp_options { |
| VERIFY_ONLY = 0x101, |
| }; |
| |
| struct option dwp_options[] = |
| { |
| { "exec", required_argument, NULL, 'e' }, |
| { "help", no_argument, NULL, 'h' }, |
| { "output", required_argument, NULL, 'o' }, |
| { "verbose", no_argument, NULL, 'v' }, |
| { "verify-only", no_argument, NULL, VERIFY_ONLY }, |
| { "version", no_argument, NULL, 'V' }, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| // Print usage message and exit. |
| |
| static void |
| usage(FILE* fd, int exit_status) |
| { |
| fprintf(fd, _("Usage: %s [options] [file...]\n"), program_name); |
| fprintf(fd, _(" -h, --help Print this help message\n")); |
| fprintf(fd, _(" -e EXE, --exec EXE Get list of dwo files from EXE" |
| " (defaults output to EXE.dwp)\n")); |
| fprintf(fd, _(" -o FILE, --output FILE Set output dwp file name\n")); |
| fprintf(fd, _(" -v, --verbose Verbose output\n")); |
| fprintf(fd, _(" --verify-only Verify output file against" |
| " exec file\n")); |
| fprintf(fd, _(" -V, --version Print version number\n")); |
| |
| // REPORT_BUGS_TO is defined in bfd/bfdver.h. |
| const char* report = REPORT_BUGS_TO; |
| if (*report != '\0') |
| fprintf(fd, _("\nReport bugs to %s\n"), report); |
| exit(exit_status); |
| } |
| |
| // Report version information. |
| |
| static void |
| print_version() |
| { |
| // This output is intended to follow the GNU standards. |
| printf("GNU dwp %s\n", BFD_VERSION_STRING); |
| printf(_("Copyright (C) 2024 Free Software Foundation, Inc.\n")); |
| printf(_("\ |
| This program is free software; you may redistribute it under the terms of\n\ |
| the GNU General Public License version 3 or (at your option) any later version.\n\ |
| This program has absolutely no warranty.\n")); |
| exit(EXIT_SUCCESS); |
| } |
| |
| // 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. |
| File_list files; |
| std::string output_filename; |
| const char* exe_filename = NULL; |
| bool verbose = false; |
| bool verify_only = false; |
| int c; |
| while ((c = getopt_long(argc, argv, "e:ho:vV", dwp_options, NULL)) != -1) |
| { |
| switch (c) |
| { |
| case 'h': |
| usage(stdout, EXIT_SUCCESS); |
| case 'e': |
| exe_filename = optarg; |
| break; |
| case 'o': |
| output_filename.assign(optarg); |
| break; |
| case 'v': |
| verbose = true; |
| break; |
| case VERIFY_ONLY: |
| verify_only = true; |
| break; |
| case 'V': |
| print_version(); |
| case '?': |
| default: |
| usage(stderr, EXIT_FAILURE); |
| } |
| } |
| |
| if (output_filename.empty()) |
| { |
| if (exe_filename == NULL) |
| gold_fatal(_("no output file specified")); |
| output_filename.assign(exe_filename); |
| output_filename.append(".dwp"); |
| } |
| |
| // Get list of .dwo files from the executable. |
| if (exe_filename != NULL) |
| { |
| Dwo_file exe_file(exe_filename); |
| exe_file.read_executable(&files); |
| } |
| |
| // Add any additional files listed on command line. |
| for (int i = optind; i < argc; ++i) |
| files.push_back(Dwo_file_entry(0, argv[i])); |
| |
| if (exe_filename == NULL && files.empty()) |
| gold_fatal(_("no input files and no executable specified")); |
| |
| if (verify_only) |
| { |
| // Get list of DWO files in the DWP file and compare with |
| // references found in the EXE file. |
| Dwo_file dwp_file(output_filename.c_str()); |
| bool ok = dwp_file.verify(files); |
| return ok ? EXIT_SUCCESS : EXIT_FAILURE; |
| } |
| |
| // Process each file, adding its contents to the output file. |
| Dwp_output_file output_file(output_filename.c_str()); |
| for (File_list::const_iterator f = files.begin(); f != files.end(); ++f) |
| { |
| if (verbose) |
| fprintf(stderr, "%s\n", f->dwo_name.c_str()); |
| Dwo_file dwo_file(f->dwo_name.c_str()); |
| dwo_file.read(&output_file); |
| } |
| output_file.finalize(); |
| |
| return EXIT_SUCCESS; |
| } |