riscv-gnu-toolchain/gdb.git - Unnamed repository; edit this file 'description' to name the repository.

diff options

author	Alan Modra <amodra@gmail.com>	2020-02-01 13:08:43 +1030
committer	Alan Modra <amodra@gmail.com>	2020-02-01 23:23:18 +1030
commit	b2b1453ad4305f1a000a514e4dfcc09af49fb3dc (patch)
tree	80574bc2d6544fdf014eea83e54e7c34b062de3c /gas/ehopt.c
parent	aa66aac47b4dd38f9524ddb5546c08cc09930d37 (diff)
download	gdb-b2b1453ad4305f1a000a514e4dfcc09af49fb3dc.zip gdb-b2b1453ad4305f1a000a514e4dfcc09af49fb3dc.tar.gz gdb-b2b1453ad4305f1a000a514e4dfcc09af49fb3dc.tar.bz2

ubsan: frv: left shift of negative value

More non-bugs flagged by ubsan, unless you happen to be compiling for a 1's complement host. cpu/ * frv.cpu (f-u12): Multiply rather than left shift signed values. (f-label16, f-label24): Likewise. opcodes/ * frv-ibld.c: Regenerate.

Diffstat (limited to 'gas/ehopt.c')

0 files changed, 0 insertions, 0 deletions

// inremental.h -- incremental linking support for gold -*- C++ -*- // Copyright (C) 2009-2015 Free Software Foundation, Inc. // Written by Mikolaj Zalewski <mikolajz@google.com>. // This file is part of gold. // 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. #ifndef GOLD_INCREMENTAL_H #define GOLD_INCREMENTAL_H #include <map> #include <vector> #include "elfcpp_file.h" #include "stringpool.h" #include "workqueue.h" #include "fileread.h" #include "output.h" #include "archive.h" namespace gold { class Input_argument; class Incremental_inputs_checker; class Incremental_script_entry; class Incremental_object_entry; class Incremental_dynobj_entry; class Incremental_archive_entry; class Incremental_inputs; class Incremental_binary; class Incremental_library; class Object; // Incremental input type as stored in .gnu_incremental_inputs. enum Incremental_input_type { INCREMENTAL_INPUT_OBJECT = 1, INCREMENTAL_INPUT_ARCHIVE_MEMBER = 2, INCREMENTAL_INPUT_ARCHIVE = 3, INCREMENTAL_INPUT_SHARED_LIBRARY = 4, INCREMENTAL_INPUT_SCRIPT = 5 }; // Incremental input file flags. // The input file type is stored in the lower eight bits. enum Incremental_input_flags { INCREMENTAL_INPUT_IN_SYSTEM_DIR = 0x8000, INCREMENTAL_INPUT_AS_NEEDED = 0x4000 }; // Symbol flags for the incremental symbol table. // These flags are stored in the top two bits of // the symbol index field. enum Incremental_shlib_symbol_flags { // Symbol is defined in this library. INCREMENTAL_SHLIB_SYM_DEF = 2, // Symbol is defined in this library, with a COPY relocation. INCREMENTAL_SHLIB_SYM_COPY = 3 }; static const int INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT = 30; // Return TRUE if a section of type SH_TYPE can be updated in place // during an incremental update. bool can_incremental_update(unsigned int sh_type); // Create an Incremental_binary object for FILE. Returns NULL is this is not // possible, e.g. FILE is not an ELF file or has an unsupported target. Incremental_binary* open_incremental_binary(Output_file* file); // Base class for recording each input file. class Incremental_input_entry { public: Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial, Timespec mtime) : filename_key_(filename_key), file_index_(0), offset_(0), info_offset_(0), arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false), as_needed_(false) { } virtual ~Incremental_input_entry() { } // Return the type of input file. Incremental_input_type type() const { return this->do_type(); } // Set the index and section offset of this input file entry. void set_offset(unsigned int file_index, unsigned int offset) { this->file_index_ = file_index; this->offset_ = offset; } // Set the section offset of the supplemental information for this entry. void set_info_offset(unsigned int info_offset) { this->info_offset_ = info_offset; } // Get the index of this input file entry. unsigned int get_file_index() const { return this->file_index_; } // Get the section offset of this input file entry. unsigned int get_offset() const { return this->offset_; } // Get the section offset of the supplemental information for this entry. unsigned int get_info_offset() const { return this->info_offset_; } // Get the stringpool key for the input filename. Stringpool::Key get_filename_key() const { return this->filename_key_; } // Get the serial number of the input file. unsigned int arg_serial() const { return this->arg_serial_; } // Get the modification time of the input file. const Timespec& get_mtime() const { return this->mtime_; } // Record that the file was found in a system directory. void set_is_in_system_directory() { this->is_in_system_directory_ = true; } // Return TRUE if the file was found in a system directory. bool is_in_system_directory() const { return this->is_in_system_directory_; } // Record that the file was linked with --as-needed. void set_as_needed() { this->as_needed_ = true; } // Return TRUE if the file was linked with --as-needed. bool as_needed() const { return this->as_needed_; } // Return a pointer to the derived Incremental_script_entry object. // Return NULL for input entries that are not script files. Incremental_script_entry* script_entry() { return this->do_script_entry(); } // Return a pointer to the derived Incremental_object_entry object. // Return NULL for input entries that are not object files. Incremental_object_entry* object_entry() { return this->do_object_entry(); } // Return a pointer to the derived Incremental_dynobj_entry object. // Return NULL for input entries that are not shared object files. Incremental_dynobj_entry* dynobj_entry() { return this->do_dynobj_entry(); } // Return a pointer to the derived Incremental_archive_entry object. // Return NULL for input entries that are not archive files. Incremental_archive_entry* archive_entry() { return this->do_archive_entry(); } protected: // Return the type of input file. virtual Incremental_input_type do_type() const = 0; // Return a pointer to the derived Incremental_script_entry object. // Return NULL for input entries that are not script files. virtual Incremental_script_entry* do_script_entry() { return NULL; } // Return a pointer to the derived Incremental_object_entry object. // Return NULL for input entries that are not object files. virtual Incremental_object_entry* do_object_entry() { return NULL; } // Return a pointer to the derived Incremental_dynobj_entry object. // Return NULL for input entries that are not shared object files. virtual Incremental_dynobj_entry* do_dynobj_entry() { return NULL; } // Return a pointer to the derived Incremental_archive_entry object. // Return NULL for input entries that are not archive files. virtual Incremental_archive_entry* do_archive_entry() { return NULL; } private: // Key of the filename string in the section stringtable. Stringpool::Key filename_key_; // Index of the entry in the output section. unsigned int file_index_; // Offset of the entry in the output section. unsigned int offset_; // Offset of the extra information in the output section. unsigned int info_offset_; // Serial number of the file in the argument list. unsigned int arg_serial_; // Last modification time of the file. Timespec mtime_; // TRUE if the file was found in a system directory. bool is_in_system_directory_; // TRUE if the file was linked with --as-needed. bool as_needed_; }; // Information about a script input that will persist during the whole linker // run. Needed only during an incremental build to retrieve the input files // added by this script. class Script_info { public: Script_info(const std::string& filename) : filename_(filename), input_file_index_(0), incremental_script_entry_(NULL) { } Script_info(const std::string& filename, unsigned int input_file_index) : filename_(filename), input_file_index_(input_file_index), incremental_script_entry_(NULL) { } // Store a pointer to the incremental information for this script. void set_incremental_info(Incremental_script_entry* entry) { this->incremental_script_entry_ = entry; } // Return the filename. const std::string& filename() const { return this->filename_; } // Return the input file index. unsigned int input_file_index() const { return this->input_file_index_; } // Return the pointer to the incremental information for this script. Incremental_script_entry* incremental_info() const { return this->incremental_script_entry_; } private: const std::string filename_; unsigned int input_file_index_; Incremental_script_entry* incremental_script_entry_; }; // Class for recording input scripts. class Incremental_script_entry : public Incremental_input_entry { public: Incremental_script_entry(Stringpool::Key filename_key, unsigned int arg_serial, Script_info* /*script*/, Timespec mtime) : Incremental_input_entry(filename_key, arg_serial, mtime), objects_() { } // Add a member object to the archive. void add_object(Incremental_input_entry* obj_entry) { this->objects_.push_back(obj_entry); } // Return the number of objects included by this script. unsigned int get_object_count() { return this->objects_.size(); } // Return the Nth object. Incremental_input_entry* get_object(unsigned int n) { gold_assert(n < this->objects_.size()); return this->objects_[n]; } protected: virtual Incremental_input_type do_type() const { return INCREMENTAL_INPUT_SCRIPT; } // Return a pointer to the derived Incremental_script_entry object. virtual Incremental_script_entry* do_script_entry() { return this; } private: // Objects that have been included by this script. std::vector<Incremental_input_entry*> objects_; }; // Class for recording input object files. class Incremental_object_entry : public Incremental_input_entry { public: Incremental_object_entry(Stringpool::Key filename_key, Object* obj, unsigned int arg_serial, Timespec mtime) : Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj), is_member_(false), sections_(), groups_() { this->sections_.reserve(obj->shnum()); } // Get the object. Object* object() const { return this->obj_; } // Record that this object is an archive member. void set_is_member() { this->is_member_ = true; } // Return true if this object is an archive member. bool is_member() const { return this->is_member_; } // Add an input section. void add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) { this->sections_.push_back(Input_section(shndx, name_key, sh_size)); } // Return the number of input sections in this object. unsigned int get_input_section_count() const { return this->sections_.size(); } // Return the input section index for the Nth input section. Stringpool::Key get_input_section_index(unsigned int n) const { return this->sections_[n].shndx_; } // Return the stringpool key of the Nth input section. Stringpool::Key get_input_section_name_key(unsigned int n) const { return this->sections_[n].name_key_; } // Return the size of the Nth input section. off_t get_input_section_size(unsigned int n) const { return this->sections_[n].sh_size_; } // Add a kept COMDAT group. void add_comdat_group(Stringpool::Key signature_key) { this->groups_.push_back(signature_key); } // Return the number of COMDAT groups. unsigned int get_comdat_group_count() const { return this->groups_.size(); } // Return the stringpool key for the signature of the Nth comdat group. Stringpool::Key get_comdat_signature_key(unsigned int n) const { return this->groups_[n]; } protected: virtual Incremental_input_type do_type() const { return (this->is_member_ ? INCREMENTAL_INPUT_ARCHIVE_MEMBER : INCREMENTAL_INPUT_OBJECT); } // Return a pointer to the derived Incremental_object_entry object. virtual Incremental_object_entry* do_object_entry() { return this; } private: // The object file itself. Object* obj_; // Whether this object is an archive member. bool is_member_; // Input sections. struct Input_section { Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) : shndx_(shndx), name_key_(name_key), sh_size_(sh_size) { } unsigned int shndx_; Stringpool::Key name_key_; off_t sh_size_; }; std::vector<Input_section> sections_; // COMDAT groups. std::vector<Stringpool::Key> groups_; }; // Class for recording shared library input files. class Incremental_dynobj_entry : public Incremental_input_entry { public: Incremental_dynobj_entry(Stringpool::Key filename_key, Stringpool::Key soname_key, Object* obj, unsigned int arg_serial, Timespec mtime) : Incremental_input_entry(filename_key, arg_serial, mtime), soname_key_(soname_key), obj_(obj) { } // Get the object. Object* object() const { return this->obj_; } // Get the stringpool key for the soname. Stringpool::Key get_soname_key() const { return this->soname_key_; } protected: virtual Incremental_input_type do_type() const { return INCREMENTAL_INPUT_SHARED_LIBRARY; } // Return a pointer to the derived Incremental_dynobj_entry object. virtual Incremental_dynobj_entry* do_dynobj_entry() { return this; } private: // Key of the soname string in the section stringtable. Stringpool::Key soname_key_; // The object file itself. Object* obj_; }; // Class for recording archive library input files. class Incremental_archive_entry : public Incremental_input_entry { public: Incremental_archive_entry(Stringpool::Key filename_key, unsigned int arg_serial, Timespec mtime) : Incremental_input_entry(filename_key, arg_serial, mtime), members_(), unused_syms_() { } // Add a member object to the archive. void add_object(Incremental_object_entry* obj_entry) { this->members_.push_back(obj_entry); obj_entry->set_is_member(); } // Add an unused global symbol to the archive. void add_unused_global_symbol(Stringpool::Key symbol_key) { this->unused_syms_.push_back(symbol_key); } // Return the number of member objects included in the link. unsigned int get_member_count() { return this->members_.size(); } // Return the Nth member object. Incremental_object_entry* get_member(unsigned int n) { return this->members_[n]; } // Return the number of unused global symbols in this archive. unsigned int get_unused_global_symbol_count() { return this->unused_syms_.size(); } // Return the Nth unused global symbol. Stringpool::Key get_unused_global_symbol(unsigned int n) { return this->unused_syms_[n]; } protected: virtual Incremental_input_type do_type() const { return INCREMENTAL_INPUT_ARCHIVE; } // Return a pointer to the derived Incremental_archive_entry object. virtual Incremental_archive_entry* do_archive_entry() { return this; } private: // Members of the archive that have been included in the link. std::vector<Incremental_object_entry*> members_; // Unused global symbols from this archive. std::vector<Stringpool::Key> unused_syms_; }; // This class contains the information needed during an incremental // build about the inputs necessary to build the .gnu_incremental_inputs. class Incremental_inputs { public: typedef std::vector<Incremental_input_entry*> Input_list; Incremental_inputs() : inputs_(), command_line_(), command_line_key_(0), strtab_(new Stringpool()), current_object_(NULL), current_object_entry_(NULL), inputs_section_(NULL), symtab_section_(NULL), relocs_section_(NULL), reloc_count_(0) { } ~Incremental_inputs() { delete this->strtab_; } // Record the command line. void report_command_line(int argc, const char* const* argv); // Record the initial info for archive file ARCHIVE. void report_archive_begin(Library_base* arch, unsigned int arg_serial, Script_info* script_info); // Record the final info for archive file ARCHIVE. void report_archive_end(Library_base* arch); // Record the info for object file OBJ. If ARCH is not NULL, // attach the object file to the archive. void report_object(Object* obj, unsigned int arg_serial, Library_base* arch, Script_info* script_info); // Record an input section belonging to object file OBJ. void report_input_section(Object* obj, unsigned int shndx, const char* name, off_t sh_size); // Record a kept COMDAT group belonging to object file OBJ. void report_comdat_group(Object* obj, const char* name); // Record the info for input script SCRIPT. void report_script(Script_info* script, unsigned int arg_serial, Timespec mtime); // Return the running count of incremental relocations. unsigned int get_reloc_count() const { return this->reloc_count_; } // Update the running count of incremental relocations. void set_reloc_count(unsigned int count) { this->reloc_count_ = count; } // Prepare for layout. Called from Layout::finalize. void finalize(); // Create the .gnu_incremental_inputs and related sections. void create_data_sections(Symbol_table* symtab); // Return the .gnu_incremental_inputs section. Output_section_data* inputs_section() const { return this->inputs_section_; } // Return the .gnu_incremental_symtab section. Output_data_space* symtab_section() const { return this->symtab_section_; } // Return the .gnu_incremental_relocs section. Output_data_space* relocs_section() const { return this->relocs_section_; } // Return the .gnu_incremental_got_plt section. Output_data_space* got_plt_section() const { return this->got_plt_section_; } // Return the .gnu_incremental_strtab stringpool. Stringpool* get_stringpool() const { return this->strtab_; } // Return the canonical form of the command line, as will be stored in // .gnu_incremental_strtab. const std::string& command_line() const { return this->command_line_; } // Return the stringpool key of the command line. Stringpool::Key command_line_key() const { return this->command_line_key_; } // Return the number of input files. int input_file_count() const { return this->inputs_.size(); } // Return the input files. const Input_list& input_files() const { return this->inputs_; } // Return the sh_entsize value for the .gnu_incremental_relocs section. unsigned int relocs_entsize() const; private: // The list of input files. Input_list inputs_; // Canonical form of the command line, as will be stored in // .gnu_incremental_strtab. std::string command_line_; // The key of the command line string in the string pool. Stringpool::Key command_line_key_; // The .gnu_incremental_strtab string pool associated with the // .gnu_incremental_inputs. Stringpool* strtab_; // Keep track of the object currently being processed. Object* current_object_; Incremental_object_entry* current_object_entry_; // The .gnu_incremental_inputs section. Output_section_data* inputs_section_; // The .gnu_incremental_symtab section. Output_data_space* symtab_section_; // The .gnu_incremental_relocs section. Output_data_space* relocs_section_; // The .gnu_incremental_got_plt section. Output_data_space* got_plt_section_; // Total count of incremental relocations. Updated during Scan_relocs // phase at the completion of each object file. unsigned int reloc_count_; }; // Reader class for global symbol info from an object file entry in // the .gnu_incremental_inputs section. template<bool big_endian> class Incremental_global_symbol_reader { private: typedef elfcpp::Swap<32, big_endian> Swap32; public: Incremental_global_symbol_reader(const unsigned char* p) : p_(p) { } unsigned int output_symndx() const { return Swap32::readval(this->p_); } unsigned int shndx() const { return Swap32::readval(this->p_ + 4); } unsigned int next_offset() const { return Swap32::readval(this->p_ + 8); } unsigned int reloc_count() const { return Swap32::readval(this->p_ + 12); } unsigned int reloc_offset() const { return Swap32::readval(this->p_ + 16); } private: // Base address of the symbol entry. const unsigned char* p_; }; // Reader class for .gnu_incremental_inputs section. template<int size, bool big_endian> class Incremental_inputs_reader { private: typedef elfcpp::Swap<size, big_endian> Swap; typedef elfcpp::Swap<16, big_endian> Swap16; typedef elfcpp::Swap<32, big_endian> Swap32; typedef elfcpp::Swap<64, big_endian> Swap64; public: // Size of the .gnu_incremental_inputs header. // (3 x 4-byte fields, plus 4 bytes padding.) static const unsigned int header_size = 16; // Size of an input file entry. // (2 x 4-byte fields, 1 x 12-byte field, 2 x 2-byte fields.) static const unsigned int input_entry_size = 24; // Size of the first part of the supplemental info block for // relocatable objects and archive members. // (7 x 4-byte fields, plus 4 bytes padding.) static const unsigned int object_info_size = 32; // Size of an input section entry. // (2 x 4-byte fields, 2 x address-sized fields.) static const unsigned int input_section_entry_size = 8 + 2 * size / 8; // Size of a global symbol entry in the supplemental info block. // (5 x 4-byte fields.) static const unsigned int global_sym_entry_size = 20; Incremental_inputs_reader() : p_(NULL), strtab_(NULL, 0), input_file_count_(0) { } Incremental_inputs_reader(const unsigned char* p, const elfcpp::Elf_strtab& strtab) : p_(p), strtab_(strtab) { this->input_file_count_ = Swap32::readval(this->p_ + 4); } // Return the version number. unsigned int version() const { return Swap32::readval(this->p_); } // Return the count of input file entries. unsigned int input_file_count() const { return this->input_file_count_; } // Return the command line. const char* command_line() const { unsigned int offset = Swap32::readval(this->p_ + 8); return this->get_string(offset); } // Reader class for an input file entry and its supplemental info. class Incremental_input_entry_reader { private: static const unsigned int object_info_size = Incremental_inputs_reader<size, big_endian>::object_info_size; static const unsigned int input_section_entry_size = Incremental_inputs_reader<size, big_endian>::input_section_entry_size; static const unsigned int global_sym_entry_size = Incremental_inputs_reader<size, big_endian>::global_sym_entry_size; public: Incremental_input_entry_reader(const Incremental_inputs_reader* inputs, unsigned int offset) : inputs_(inputs), offset_(offset) { this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4); this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20); } // Return the filename. const char* filename() const { unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_); return this->inputs_->get_string(offset); } // Return the argument serial number. unsigned int arg_serial() const { return Swap16::readval(this->inputs_->p_ + this->offset_ + 22); } // Return the timestamp. Timespec get_mtime() const { Timespec t; const unsigned char* p = this->inputs_->p_ + this->offset_ + 8; t.seconds = Swap64::readval(p); t.nanoseconds = Swap32::readval(p+8); return t; } // Return the type of input file. Incremental_input_type type() const { return static_cast<Incremental_input_type>(this->flags_ & 0xff); } // Return TRUE if the file was found in a system directory. bool is_in_system_directory() const { return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; } // Return TRUE if the file was linked with --as-needed. bool as_needed() const { return (this->flags_ & INCREMENTAL_INPUT_AS_NEEDED) != 0; } // Return the input section count -- for objects only. unsigned int get_input_section_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_); } // Return the soname -- for shared libraries only. const char* get_soname() const { gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); unsigned int offset = Swap32::readval(this->inputs_->p_ + this->info_offset_); return this->inputs_->get_string(offset); } // Return the offset of the supplemental info for symbol SYMNDX -- // for objects only. unsigned int get_symbol_offset(unsigned int symndx) const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); unsigned int section_count = this->get_input_section_count(); return (this->info_offset_ + this->object_info_size + section_count * this->input_section_entry_size + symndx * this->global_sym_entry_size); } // Return the global symbol count -- for objects & shared libraries only. unsigned int get_global_symbol_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER || this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); } // Return the offset of the first local symbol -- for objects only. unsigned int get_local_symbol_offset() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8); } // Return the local symbol count -- for objects only. unsigned int get_local_symbol_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 12); } // Return the index of the first dynamic relocation -- for objects only. unsigned int get_first_dyn_reloc() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 16); } // Return the dynamic relocation count -- for objects only. unsigned int get_dyn_reloc_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 20); } // Return the COMDAT group count -- for objects only. unsigned int get_comdat_group_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 24); } // Return the object count -- for scripts only. unsigned int get_object_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); return Swap32::readval(this->inputs_->p_ + this->info_offset_); } // Return the input file offset for object N -- for scripts only. unsigned int get_object_offset(unsigned int n) const { gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4 + n * 4); } // Return the member count -- for archives only. unsigned int get_member_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); return Swap32::readval(this->inputs_->p_ + this->info_offset_); } // Return the unused symbol count -- for archives only. unsigned int get_unused_symbol_count() const { gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); } // Return the input file offset for archive member N -- for archives only. unsigned int get_member_offset(unsigned int n) const { gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8 + n * 4); } // Return the Nth unused global symbol -- for archives only. const char* get_unused_symbol(unsigned int n) const { gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); unsigned int member_count = this->get_member_count(); unsigned int offset = Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8 + member_count * 4 + n * 4); return this->inputs_->get_string(offset); } // Information about an input section. struct Input_section_info { const char* name; unsigned int output_shndx; off_t sh_offset; off_t sh_size; }; // Return info about the Nth input section -- for objects only. Input_section_info get_input_section(unsigned int n) const { Input_section_info info; const unsigned char* p = (this->inputs_->p_ + this->info_offset_ + this->object_info_size + n * this->input_section_entry_size); unsigned int name_offset = Swap32::readval(p); info.name = this->inputs_->get_string(name_offset); info.output_shndx = Swap32::readval(p + 4); info.sh_offset = Swap::readval(p + 8); info.sh_size = Swap::readval(p + 8 + size / 8); return info; } // Return info about the Nth global symbol -- for objects only. Incremental_global_symbol_reader<big_endian> get_global_symbol_reader(unsigned int n) const { gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); unsigned int section_count = this->get_input_section_count(); const unsigned char* p = (this->inputs_->p_ + this->info_offset_ + this->object_info_size + section_count * this->input_section_entry_size + n * this->global_sym_entry_size); return Incremental_global_symbol_reader<big_endian>(p); } // Return the signature of the Nth comdat group -- for objects only. const char* get_comdat_group_signature(unsigned int n) const { unsigned int section_count = this->get_input_section_count(); unsigned int symbol_count = this->get_global_symbol_count(); const unsigned char* p = (this->inputs_->p_ + this->info_offset_ + this->object_info_size + section_count * this->input_section_entry_size + symbol_count * this->global_sym_entry_size + n * 4); unsigned int name_offset = Swap32::readval(p); return this->inputs_->get_string(name_offset); } // Return the output symbol index for the Nth global symbol -- for shared // libraries only. Sets *IS_DEF to TRUE if the symbol is defined in this // input file. Sets *IS_COPY to TRUE if the symbol was copied from this // input file with a COPY relocation. unsigned int get_output_symbol_index(unsigned int n, bool* is_def, bool* is_copy) { gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); const unsigned char* p = (this->inputs_->p_ + this->info_offset_ + 8 + n * 4); unsigned int output_symndx = Swap32::readval(p); unsigned int flags = output_symndx >> INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT; output_symndx &= ((1U << INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT) - 1); switch (flags) { case INCREMENTAL_SHLIB_SYM_DEF: *is_def = true; *is_copy = false; break; case INCREMENTAL_SHLIB_SYM_COPY: *is_def = true; *is_copy = true; break; default: *is_def = false; *is_copy = false; } return output_symndx; } private: // The reader instance for the containing section. const Incremental_inputs_reader* inputs_; // The flags, including the type of input file. unsigned int flags_; // Section offset to the input file entry. unsigned int offset_; // Section offset to the supplemental info for the input file. unsigned int info_offset_; }; // Return the offset of an input file entry given its index N. unsigned int input_file_offset(unsigned int n) const { gold_assert(n < this->input_file_count_); return this->header_size + n * this->input_entry_size; } // Return the index of an input file entry given its OFFSET. unsigned int input_file_index(unsigned int offset) const { int n = ((offset - this->header_size) / this->input_entry_size); gold_assert(input_file_offset(n) == offset); return n; } // Return a reader for the Nth input file entry. Incremental_input_entry_reader input_file(unsigned int n) const { return Incremental_input_entry_reader(this, this->input_file_offset(n)); } // Return a reader for the input file entry at OFFSET. Incremental_input_entry_reader input_file_at_offset(unsigned int offset) const { gold_assert(offset < (this->header_size + this->input_file_count_ * this->input_entry_size)); return Incremental_input_entry_reader(this, offset); } // Return a reader for the global symbol info at OFFSET. Incremental_global_symbol_reader<big_endian> global_symbol_reader_at_offset(unsigned int offset) const { const unsigned char* p = this->p_ + offset; return Incremental_global_symbol_reader<big_endian>(p); } private: // Lookup a string in the ELF string table. const char* get_string(unsigned int offset) const { const char* s; if (this->strtab_.get_c_string(offset, &s)) return s; return NULL; } // Base address of the .gnu_incremental_inputs section. const unsigned char* p_; // The associated ELF string table. elfcpp::Elf_strtab strtab_; // The number of input file entries in this section. unsigned int input_file_count_; }; // Reader class for the .gnu_incremental_symtab section. template<bool big_endian> class Incremental_symtab_reader { public: Incremental_symtab_reader() : p_(NULL), len_(0) { } Incremental_symtab_reader(const unsigned char* p, off_t len) : p_(p), len_(len) { } // Return the count of symbols in this section. unsigned int symbol_count() const { return static_cast<unsigned int>(this->len_ / 4); } // Return the list head for symbol table entry N. unsigned int get_list_head(unsigned int n) const { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4 * n); } private: // Base address of the .gnu_incremental_relocs section. const unsigned char* p_; // Size of the section. off_t len_; }; // Reader class for the .gnu_incremental_relocs section. template<int size, bool big_endian> class Incremental_relocs_reader { private: // Size of each field. static const unsigned int field_size = size / 8; public: typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; // Size of each entry. static const unsigned int reloc_size = 8 + 2 * field_size; Incremental_relocs_reader() : p_(NULL), len_(0) { } Incremental_relocs_reader(const unsigned char* p, off_t len) : p_(p), len_(len) { } // Return the count of relocations in this section. unsigned int reloc_count() const { return static_cast<unsigned int>(this->len_ / reloc_size); } // Return the relocation type for relocation entry at offset OFF. unsigned int get_r_type(unsigned int off) const { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); } // Return the output section index for relocation entry at offset OFF. unsigned int get_r_shndx(unsigned int off) const { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); } // Return the output section offset for relocation entry at offset OFF. Address get_r_offset(unsigned int off) const { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); } // Return the addend for relocation entry at offset OFF. Addend get_r_addend(unsigned int off) const { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8 + this->field_size); } // Return a pointer to the relocation entry at offset OFF. const unsigned char* data(unsigned int off) const { return this->p_ + off; } private: // Base address of the .gnu_incremental_relocs section. const unsigned char* p_; // Size of the section. off_t len_; }; // Reader class for the .gnu_incremental_got_plt section. template<bool big_endian> class Incremental_got_plt_reader { public: Incremental_got_plt_reader() : p_(NULL), got_count_(0), got_desc_p_(NULL), plt_desc_p_(NULL) { } Incremental_got_plt_reader(const unsigned char* p) : p_(p) { this->got_count_ = elfcpp::Swap<32, big_endian>::readval(p); this->got_desc_p_ = p + 8 + ((this->got_count_ + 3) & ~3); this->plt_desc_p_ = this->got_desc_p_ + this->got_count_ * 8; } // Return the GOT entry count. unsigned int get_got_entry_count() const { return this->got_count_; } // Return the PLT entry count. unsigned int get_plt_entry_count() const { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4); } // Return the GOT type for GOT entry N. unsigned int get_got_type(unsigned int n) { return this->p_[8 + n]; } // Return the symbol index for GOT entry N. unsigned int get_got_symndx(unsigned int n) { return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8); } // Return the input file index for GOT entry N. unsigned int get_got_input_index(unsigned int n) { return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8 + 4); } // Return the PLT descriptor for PLT entry N. unsigned int get_plt_desc(unsigned int n) { return elfcpp::Swap<32, big_endian>::readval(this->plt_desc_p_ + n * 4); } private: // Base address of the .gnu_incremental_got_plt section. const unsigned char* p_; // GOT entry count. unsigned int got_count_; // Base address of the GOT descriptor array. const unsigned char* got_desc_p_; // Base address of the PLT descriptor array. const unsigned char* plt_desc_p_; }; // An object representing the ELF file we edit during an incremental build. // Similar to Object or Dynobj, but operates on Output_file and contains // methods to support incremental updating. This is the abstract parent class // implemented in Sized_incremental_binary<size, big_endian> for a specific // endianness and size. class Incremental_binary { public: Incremental_binary(Output_file* output, Target* /*target*/) : input_args_map_(), library_map_(), script_map_(), output_(output) { } virtual ~Incremental_binary() { } // Check the .gnu_incremental_inputs section to see whether an incremental // build is possible. bool check_inputs(const Command_line& cmdline, Incremental_inputs* incremental_inputs) { return this->do_check_inputs(cmdline, incremental_inputs); } // Report an error. void error(const char* format, ...) const ATTRIBUTE_PRINTF_2; // Proxy class for a sized Incremental_input_entry_reader. class Input_reader { public: Input_reader() { } virtual ~Input_reader() { } const char* filename() const { return this->do_filename(); } Timespec get_mtime() const { return this->do_get_mtime(); } Incremental_input_type type() const { return this->do_type(); } unsigned int arg_serial() const { return this->do_arg_serial(); } unsigned int get_unused_symbol_count() const { return this->do_get_unused_symbol_count(); } const char* get_unused_symbol(unsigned int n) const { return this->do_get_unused_symbol(n); } protected: virtual const char* do_filename() const = 0; virtual Timespec do_get_mtime() const = 0; virtual Incremental_input_type do_type() const = 0; virtual unsigned int do_arg_serial() const = 0; virtual unsigned int do_get_unused_symbol_count() const = 0; virtual const char* do_get_unused_symbol(unsigned int n) const = 0; }; // Return the number of input files. unsigned int input_file_count() const { return this->do_input_file_count(); } // Return an Input_reader for input file N. const Input_reader* get_input_reader(unsigned int n) const { return this->do_get_input_reader(n); } // Return TRUE if the input file N has changed since the last link. bool file_has_changed(unsigned int n) const { return this->do_file_has_changed(n); } // Return the Input_argument for input file N. Returns NULL if // the Input_argument is not available. const Input_argument* get_input_argument(unsigned int n) const { const Input_reader* input_file = this->do_get_input_reader(n); unsigned int arg_serial = input_file->arg_serial(); if (arg_serial == 0 || arg_serial > this->input_args_map_.size()) return NULL; return this->input_args_map_[arg_serial - 1]; } // Return an Incremental_library for the given input file. Incremental_library* get_library(unsigned int n) const { return this->library_map_[n]; } // Return a Script_info for the given input file. Script_info* get_script_info(unsigned int n) const { return this->script_map_[n]; } // Initialize the layout of the output file based on the existing // output file. void init_layout(Layout* layout) { this->do_init_layout(layout); } // Mark regions of the input file that must be kept unchanged. void reserve_layout(unsigned int input_file_index) { this->do_reserve_layout(input_file_index); } // Process the GOT and PLT entries from the existing output file. void process_got_plt(Symbol_table* symtab, Layout* layout) { this->do_process_got_plt(symtab, layout); } // Emit COPY relocations from the existing output file. void emit_copy_relocs(Symbol_table* symtab) { this->do_emit_copy_relocs(symtab); } // Apply incremental relocations for symbols whose values have changed. void apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, Output_file* of) { this->do_apply_incremental_relocs(symtab, layout, of); } // Functions and types for the elfcpp::Elf_file interface. This // permit us to use Incremental_binary as the File template parameter for // elfcpp::Elf_file. // The View class is returned by view. It must support a single // method, data(). This is trivial, because Output_file::get_output_view // does what we need. class View { public: View(const unsigned char* p) : p_(p) { } const unsigned char* data() const { return this->p_; } private: const unsigned char* p_; }; // Return a View. View view(off_t file_offset, section_size_type data_size) { return View(this->output_->get_input_view(file_offset, data_size)); } // A location in the file. struct Location { off_t file_offset; off_t data_size; Location(off_t fo, section_size_type ds) : file_offset(fo), data_size(ds) { } Location() : file_offset(0), data_size(0) { } }; // Get a View given a Location. View view(Location loc) { return View(this->view(loc.file_offset, loc.data_size)); } // Return the Output_file. Output_file* output_file() { return this->output_; } protected: // Check the .gnu_incremental_inputs section to see whether an incremental // build is possible. virtual bool do_check_inputs(const Command_line& cmdline, Incremental_inputs* incremental_inputs) = 0; // Return TRUE if input file N has changed since the last incremental link. virtual bool do_file_has_changed(unsigned int n) const = 0; // Initialize the layout of the output file based on the existing // output file. virtual void do_init_layout(Layout* layout) = 0; // Mark regions of the input file that must be kept unchanged. virtual void do_reserve_layout(unsigned int input_file_index) = 0; // Process the GOT and PLT entries from the existing output file. virtual void do_process_got_plt(Symbol_table* symtab, Layout* layout) = 0; // Emit COPY relocations from the existing output file. virtual void do_emit_copy_relocs(Symbol_table* symtab) = 0; // Apply incremental relocations for symbols whose values have changed. virtual void do_apply_incremental_relocs(const Symbol_table*, Layout*, Output_file*) = 0; virtual unsigned int do_input_file_count() const = 0; virtual const Input_reader* do_get_input_reader(unsigned int) const = 0; // Map from input file index to Input_argument. std::vector<const Input_argument*> input_args_map_; // Map from an input file index to an Incremental_library. std::vector<Incremental_library*> library_map_; // Map from an input file index to a Script_info. std::vector<Script_info*> script_map_; private: // Edited output file object. Output_file* output_; }; template<int size, bool big_endian> class Sized_relobj_incr; template<int size, bool big_endian> class Sized_incremental_binary : public Incremental_binary { public: Sized_incremental_binary(Output_file* output, const elfcpp::Ehdr<size, big_endian>& ehdr, Target* target) : Incremental_binary(output, target), elf_file_(this, ehdr), input_objects_(), section_map_(), symbol_map_(), copy_relocs_(), main_symtab_loc_(), main_strtab_loc_(), has_incremental_info_(false), inputs_reader_(), symtab_reader_(), relocs_reader_(), got_plt_reader_(), input_entry_readers_() { this->setup_readers(); } // Returns TRUE if the file contains incremental info. bool has_incremental_info() const { return this->has_incremental_info_; } // Record a pointer to the object for input file N. void set_input_object(unsigned int n, Sized_relobj_incr<size, big_endian>* obj) { this->input_objects_[n] = obj; } // Return a pointer to the object for input file N. Sized_relobj_incr<size, big_endian>* input_object(unsigned int n) const { gold_assert(n < this->input_objects_.size()); return this->input_objects_[n]; } // Return the Output_section for section index SHNDX. Output_section* output_section(unsigned int shndx) { return this->section_map_[shndx]; } // Map a symbol table entry from the base file to the output symbol table. // SYMNDX is relative to the first forced-local or global symbol in the // input file symbol table. void add_global_symbol(unsigned int symndx, Symbol* gsym) { this->symbol_map_[symndx] = gsym; } // Map a symbol table entry from the base file to the output symbol table. // SYMNDX is relative to the first forced-local or global symbol in the // input file symbol table. Symbol* global_symbol(unsigned int symndx) const { return this->symbol_map_[symndx]; } // Add a COPY relocation for a global symbol. void add_copy_reloc(Symbol* gsym, Output_section* os, off_t offset) { this->copy_relocs_.push_back(Copy_reloc(gsym, os, offset)); } // Readers for the incremental info sections. const Incremental_inputs_reader<size, big_endian>& inputs_reader() const { return this->inputs_reader_; } const Incremental_symtab_reader<big_endian>& symtab_reader() const { return this->symtab_reader_; } const Incremental_relocs_reader<size, big_endian>& relocs_reader() const { return this->relocs_reader_; } const Incremental_got_plt_reader<big_endian>& got_plt_reader() const { return this->got_plt_reader_; } void get_symtab_view(View* symtab_view, unsigned int* sym_count, elfcpp::Elf_strtab* strtab); protected: typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; typedef typename Inputs_reader::Incremental_input_entry_reader Input_entry_reader; virtual bool do_check_inputs(const Command_line& cmdline, Incremental_inputs* incremental_inputs); // Return TRUE if input file N has changed since the last incremental link. virtual bool do_file_has_changed(unsigned int n) const; // Initialize the layout of the output file based on the existing // output file. virtual void do_init_layout(Layout* layout); // Mark regions of the input file that must be kept unchanged. virtual void do_reserve_layout(unsigned int input_file_index); // Process the GOT and PLT entries from the existing output file. virtual void do_process_got_plt(Symbol_table* symtab, Layout* layout); // Emit COPY relocations from the existing output file. virtual void do_emit_copy_relocs(Symbol_table* symtab); // Apply incremental relocations for symbols whose values have changed. virtual void do_apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, Output_file* of); // Proxy class for a sized Incremental_input_entry_reader. class Sized_input_reader : public Input_reader { public: Sized_input_reader(Input_entry_reader r) : Input_reader(), reader_(r) { } virtual ~Sized_input_reader() { } private: const char* do_filename() const { return this->reader_.filename(); } Timespec do_get_mtime() const { return this->reader_.get_mtime(); } Incremental_input_type do_type() const { return this->reader_.type(); } unsigned int do_arg_serial() const { return this->reader_.arg_serial(); } unsigned int do_get_unused_symbol_count() const { return this->reader_.get_unused_symbol_count(); } const char* do_get_unused_symbol(unsigned int n) const { return this->reader_.get_unused_symbol(n); } Input_entry_reader reader_; }; virtual unsigned int do_input_file_count() const { return this->inputs_reader_.input_file_count(); } virtual const Input_reader* do_get_input_reader(unsigned int n) const { gold_assert(n < this->input_entry_readers_.size()); return &this->input_entry_readers_[n]; } private: // List of symbols that need COPY relocations. struct Copy_reloc { Copy_reloc(Symbol* sym, Output_section* os, off_t off) : symbol(sym), output_section(os), offset(off) { } // The global symbol to copy. Symbol* symbol; // The output section into which the symbol was copied. Output_section* output_section; // The offset within that output section. off_t offset; }; typedef std::vector<Copy_reloc> Copy_relocs; bool find_incremental_inputs_sections(unsigned int* p_inputs_shndx, unsigned int* p_symtab_shndx, unsigned int* p_relocs_shndx, unsigned int* p_got_plt_shndx, unsigned int* p_strtab_shndx); void setup_readers(); // Output as an ELF file. elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_; // Vector of pointers to the input objects for the unchanged files. // For replaced files, the corresponding pointer is NULL. std::vector<Sized_relobj_incr<size, big_endian>*> input_objects_; // Map section index to an Output_section in the updated layout. std::vector<Output_section*> section_map_; // Map global symbols from the input file to the symbol table. std::vector<Symbol*> symbol_map_; // List of symbols that need COPY relocations. Copy_relocs copy_relocs_; // Locations of the main symbol table and symbol string table. Location main_symtab_loc_; Location main_strtab_loc_; // Readers for the incremental info sections. bool has_incremental_info_; Incremental_inputs_reader<size, big_endian> inputs_reader_; Incremental_symtab_reader<big_endian> symtab_reader_; Incremental_relocs_reader<size, big_endian> relocs_reader_; Incremental_got_plt_reader<big_endian> got_plt_reader_; std::vector<Sized_input_reader> input_entry_readers_; }; // An incremental Relobj. This class represents a relocatable object // that has not changed since the last incremental link, and whose contents // can be used directly from the base file. template<int size, bool big_endian> class Sized_relobj_incr : 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_incr(const std::string& name, Sized_incremental_binary<size, big_endian>* ibase, unsigned int input_file_index); private: // For convenience. typedef Sized_relobj_incr<size, big_endian> This; static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; typedef typename Sized_relobj<size, big_endian>::Output_sections Output_sections; typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; typedef typename Inputs_reader::Incremental_input_entry_reader Input_entry_reader; // A local symbol. struct Local_symbol { Local_symbol(const char* name_, Address value_, unsigned int size_, unsigned int shndx_, unsigned int type_, bool needs_dynsym_entry_) : st_value(value_), name(name_), st_size(size_), st_shndx(shndx_), st_type(type_), output_dynsym_index(0), needs_dynsym_entry(needs_dynsym_entry_) { } // The symbol value. Address st_value; // The symbol name. This points to the stringpool entry. const char* name; // The symbol size. unsigned int st_size; // The output section index. unsigned int st_shndx : 28; // The symbol type. unsigned int st_type : 4; // The index of the symbol in the output dynamic symbol table. unsigned int output_dynsym_index : 31; // TRUE if the symbol needs to appear in the dynamic symbol table. unsigned int needs_dynsym_entry : 1; }; // Return TRUE if this is an incremental (unchanged) input file. bool do_is_incremental() const { return true; } // Return the last modified time of the file. Timespec do_get_mtime() { return this->input_reader_.get_mtime(); } // Read the symbols. void do_read_symbols(Read_symbols_data*); // Lay out the input sections. void do_layout(Symbol_table*, Layout*, Read_symbols_data*); // Layout sections whose layout was deferred while waiting for // input files from a plugin. void do_layout_deferred_sections(Layout*); // Add the symbols to the symbol table. void do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); Archive::Should_include do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, std::string* why); // Iterate over global symbols, calling a visitor class V for each. void do_for_all_global_symbols(Read_symbols_data* sd, Library_base::Symbol_visitor_base* v); // Get the size of a section. uint64_t do_section_size(unsigned int shndx); // Get the name of a section. std::string do_section_name(unsigned int shndx) const; // Return a view of the contents of a section. const unsigned char* do_section_contents(unsigned int shndx, section_size_type* plen, bool cache); // Return section flags. uint64_t do_section_flags(unsigned int shndx); // Return section entsize. uint64_t do_section_entsize(unsigned int shndx); // Return section address. uint64_t do_section_address(unsigned int shndx); // Return section type. unsigned int do_section_type(unsigned int shndx); // Return the section link field. unsigned int do_section_link(unsigned int shndx); // Return the section link field. unsigned int do_section_info(unsigned int shndx); // Return the section alignment. uint64_t do_section_addralign(unsigned int shndx); // Return the Xindex structure to use. Xindex* do_initialize_xindex(); // Get symbol counts. void do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; // Get global symbols. const Symbols* do_get_global_symbols() const { return &this->symbols_; } // 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(); } bool do_local_is_tls(unsigned int) const { gold_unreachable(); } // Return the number of local symbols. unsigned int do_local_symbol_count() const { return this->local_symbol_count_; } // Return the number of local symbols in the output symbol table. unsigned int do_output_local_symbol_count() const { return this->local_symbol_count_; } // Return the file offset for local symbols in the output symbol table. off_t do_local_symbol_offset() const { return this->local_symbol_offset_; } // Read the relocs. void do_read_relocs(Read_relocs_data*); // 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*); // Scan the relocs and adjust the symbol table. void do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*); // Count the local symbols. void do_count_local_symbols(Stringpool_template<char>*, Stringpool_template<char>*); // Finalize the local symbols. unsigned int do_finalize_local_symbols(unsigned int, off_t, Symbol_table*); // Set the offset where local dynamic symbol information will be stored. unsigned int do_set_local_dynsym_indexes(unsigned int); // Set the offset where local dynamic symbol information will be stored. unsigned int do_set_local_dynsym_offset(off_t); // Relocate the input sections and write out the local symbols. void do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of); // Set the offset of a section. void do_set_section_offset(unsigned int shndx, uint64_t off); // The Incremental_binary base file. Sized_incremental_binary<size, big_endian>* ibase_; // The index of the object in the input file list. unsigned int input_file_index_; // The reader for the input file. Input_entry_reader input_reader_; // The number of local symbols. unsigned int local_symbol_count_; // The number of local symbols which go into the output file's dynamic // symbol table. unsigned int output_local_dynsym_count_; // This starting symbol index in the output symbol table. unsigned int local_symbol_index_; // The file offset for local symbols in the output symbol table. unsigned int local_symbol_offset_; // The file offset for local symbols in the output symbol table. unsigned int local_dynsym_offset_; // The entries in the symbol table for the external symbols. Symbols symbols_; // Number of symbols defined in object file itself. size_t defined_count_; // The offset of the first incremental relocation for this object. unsigned int incr_reloc_offset_; // The number of incremental relocations for this object. unsigned int incr_reloc_count_; // The index of the first incremental relocation for this object in the // updated output file. unsigned int incr_reloc_output_index_; // A copy of the incremental relocations from this object. unsigned char* incr_relocs_; // The local symbols. std::vector<Local_symbol> local_symbols_; }; // An incremental Dynobj. This class represents a shared object that has // not changed since the last incremental link, and whose contents can be // used directly from the base file. template<int size, bool big_endian> class Sized_incr_dynobj : public Dynobj { public: typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; static const Address invalid_address = static_cast<Address>(0) - 1; Sized_incr_dynobj(const std::string& name, Sized_incremental_binary<size, big_endian>* ibase, unsigned int input_file_index); private: typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; typedef typename Inputs_reader::Incremental_input_entry_reader Input_entry_reader; // Return TRUE if this is an incremental (unchanged) input file. bool do_is_incremental() const { return true; } // Return the last modified time of the file. Timespec do_get_mtime() { return this->input_reader_.get_mtime(); } // Read the symbols. void do_read_symbols(Read_symbols_data*); // Lay out the input sections. void do_layout(Symbol_table*, Layout*, Read_symbols_data*); // Add the symbols to the symbol table. void do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); Archive::Should_include do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, std::string* why); // Iterate over global symbols, calling a visitor class V for each. void do_for_all_global_symbols(Read_symbols_data* sd, Library_base::Symbol_visitor_base* v); // Iterate over local symbols, calling a visitor class V for each GOT offset // associated with a local symbol. void do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; // Get the size of a section. uint64_t do_section_size(unsigned int shndx); // Get the name of a section. std::string do_section_name(unsigned int shndx) const; // Return a view of the contents of a section. const unsigned char* do_section_contents(unsigned int shndx, section_size_type* plen, bool cache); // Return section flags. uint64_t do_section_flags(unsigned int shndx); // Return section entsize. uint64_t do_section_entsize(unsigned int shndx); // Return section address. uint64_t do_section_address(unsigned int shndx); // Return section type. unsigned int do_section_type(unsigned int shndx); // Return the section link field. unsigned int do_section_link(unsigned int shndx); // Return the section link field. unsigned int do_section_info(unsigned int shndx); // Return the section alignment. uint64_t do_section_addralign(unsigned int shndx); // Return the Xindex structure to use. Xindex* do_initialize_xindex(); // Get symbol counts. void do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; // Get global symbols. const Symbols* do_get_global_symbols() const { return &this->symbols_; } // The Incremental_binary base file. Sized_incremental_binary<size, big_endian>* ibase_; // The index of the object in the input file list. unsigned int input_file_index_; // The reader for the input file. Input_entry_reader input_reader_; // The entries in the symbol table for the external symbols. Symbols symbols_; // Number of symbols defined in object file itself. size_t defined_count_; }; // Allocate an incremental object of the appropriate size and endianness. extern Object* make_sized_incremental_object( Incremental_binary* base, unsigned int input_file_index, Incremental_input_type input_type, const Incremental_binary::Input_reader* input_reader); // This class represents an Archive library (or --start-lib/--end-lib group) // that has not changed since the last incremental link. Its contents come // from the incremental inputs entry in the base file. class Incremental_library : public Library_base { public: Incremental_library(const char* filename, unsigned int input_file_index, const Incremental_binary::Input_reader* input_reader) : Library_base(NULL), filename_(filename), input_file_index_(input_file_index), input_reader_(input_reader), unused_symbols_(), is_reported_(false) { } // Return the input file index. unsigned int input_file_index() const { return this->input_file_index_; } // Return the serial number of the input file. unsigned int arg_serial() const { return this->input_reader_->arg_serial(); } // Copy the unused symbols from the incremental input info. // We need to do this because we may be overwriting the incremental // input info in the base file before we write the new incremental // info. void copy_unused_symbols(); // Return FALSE on the first call to indicate that the library needs // to be recorded; return TRUE subsequently. bool is_reported() { bool was_reported = this->is_reported_; is_reported_ = true; return was_reported; } private: typedef std::vector<std::string> Symbol_list; // The file name. const std::string& do_filename() const { return this->filename_; } // Return the modification time of the archive file. Timespec do_get_mtime() { return this->input_reader_->get_mtime(); } // Iterator for unused global symbols in the library. void do_for_all_unused_symbols(Symbol_visitor_base* v) const; // The name of the library. std::string filename_; // The input file index of this library. unsigned int input_file_index_; // A reader for the incremental input information. const Incremental_binary::Input_reader* input_reader_; // List of unused symbols defined in this library. Symbol_list unused_symbols_; // TRUE when this library has been reported to the new incremental info. bool is_reported_; }; } // End namespace gold. #endif // !defined(GOLD_INCREMENTAL_H)


context:
space:
mode: