// symtab.h -- the gold symbol table -*- C++ -*- // Symbol_table // The symbol table. #include #include #include #include "elfcpp.h" #include "stringpool.h" #include "object.h" #ifndef GOLD_SYMTAB_H #define GOLD_SYMTAB_H namespace gold { class Object; class Relobj; template class Sized_relobj; class Dynobj; template class Sized_dynobj; class Versions; class Output_data; class Output_section; class Output_segment; class Output_file; class Target; // The base class of an entry in the symbol table. The symbol table // can have a lot of entries, so we don't want this class to big. // Size dependent fields can be found in the template class // Sized_symbol. Targets may support their own derived classes. class Symbol { public: // Because we want the class to be small, we don't use any virtual // functions. But because symbols can be defined in different // places, we need to classify them. This enum is the different // sources of symbols we support. enum Source { // Symbol defined in a relocatable or dynamic input file--this is // the most common case. FROM_OBJECT, // Symbol defined in an Output_data, a special section created by // the target. IN_OUTPUT_DATA, // Symbol defined in an Output_segment, with no associated // section. IN_OUTPUT_SEGMENT, // Symbol value is constant. CONSTANT }; // When the source is IN_OUTPUT_SEGMENT, we need to describe what // the offset means. enum Segment_offset_base { // From the start of the segment. SEGMENT_START, // From the end of the segment. SEGMENT_END, // From the filesz of the segment--i.e., after the loaded bytes // but before the bytes which are allocated but zeroed. SEGMENT_BSS }; // Return the symbol name. const char* name() const { return this->name_; } // Return the symbol version. This will return NULL for an // unversioned symbol. const char* version() const { return this->version_; } // Return the symbol source. Source source() const { return this->source_; } // Return the object with which this symbol is associated. Object* object() const { gold_assert(this->source_ == FROM_OBJECT); return this->u_.from_object.object; } // Return the index of the section in the input relocatable or // dynamic object file. unsigned int shndx() const { gold_assert(this->source_ == FROM_OBJECT); return this->u_.from_object.shndx; } // Return the output data section with which this symbol is // associated, if the symbol was specially defined with respect to // an output data section. Output_data* output_data() const { gold_assert(this->source_ == IN_OUTPUT_DATA); return this->u_.in_output_data.output_data; } // If this symbol was defined with respect to an output data // section, return whether the value is an offset from end. bool offset_is_from_end() const { gold_assert(this->source_ == IN_OUTPUT_DATA); return this->u_.in_output_data.offset_is_from_end; } // Return the output segment with which this symbol is associated, // if the symbol was specially defined with respect to an output // segment. Output_segment* output_segment() const { gold_assert(this->source_ == IN_OUTPUT_SEGMENT); return this->u_.in_output_segment.output_segment; } // If this symbol was defined with respect to an output segment, // return the offset base. Segment_offset_base offset_base() const { gold_assert(this->source_ == IN_OUTPUT_SEGMENT); return this->u_.in_output_segment.offset_base; } // Return the symbol binding. elfcpp::STB binding() const { return this->binding_; } // Return the symbol type. elfcpp::STT type() const { return this->type_; } // Return the symbol visibility. elfcpp::STV visibility() const { return this->visibility_; } // Return the non-visibility part of the st_other field. unsigned char nonvis() const { return this->nonvis_; } // Return whether this symbol is a forwarder. This will never be // true of a symbol found in the hash table, but may be true of // symbol pointers attached to object files. bool is_forwarder() const { return this->is_forwarder_; } // Mark this symbol as a forwarder. void set_forwarder() { this->is_forwarder_ = true; } // Return whether this symbol needs an entry in the dynamic symbol // table. bool needs_dynsym_entry() const { return this->needs_dynsym_entry_; } // Mark this symbol as needing an entry in the dynamic symbol table. void set_needs_dynsym_entry() { this->needs_dynsym_entry_ = true; } // Mark this symbol as having been seen in a dynamic object. void set_in_dyn() { this->in_dyn_ = true; } // Return the index of this symbol in the output file symbol table. // A value of -1U means that this symbol is not going into the // output file. This starts out as zero, and is set to a non-zero // value by Symbol_table::finalize. It is an error to ask for the // symbol table index before it has been set. unsigned int symtab_index() const { gold_assert(this->symtab_index_ != 0); return this->symtab_index_; } // Set the index of the symbol in the output file symbol table. void set_symtab_index(unsigned int index) { gold_assert(index != 0); this->symtab_index_ = index; } // Return whether this symbol already has an index in the output // file symbol table. bool has_symtab_index() const { return this->symtab_index_ != 0; } // Return the index of this symbol in the dynamic symbol table. A // value of -1U means that this symbol is not going into the dynamic // symbol table. This starts out as zero, and is set to a non-zero // during Layout::finalize. It is an error to ask for the dynamic // symbol table index before it has been set. unsigned int dynsym_index() const { gold_assert(this->dynsym_index_ != 0); return this->dynsym_index_; } // Set the index of the symbol in the dynamic symbol table. void set_dynsym_index(unsigned int index) { gold_assert(index != 0); this->dynsym_index_ = index; } // Return whether this symbol already has an index in the dynamic // symbol table. bool has_dynsym_index() const { return this->dynsym_index_ != 0; } // Return whether this symbol has an entry in the GOT section. bool has_got_offset() const { return this->has_got_offset_; } // Return the offset into the GOT section of this symbol. unsigned int got_offset() const { gold_assert(this->has_got_offset()); return this->got_offset_; } // Set the GOT offset of this symbol. void set_got_offset(unsigned int got_offset) { this->has_got_offset_ = true; this->got_offset_ = got_offset; } // Return whether this symbol has an entry in the PLT section. bool has_plt_offset() const { return this->has_plt_offset_; } // Return the offset into the PLT section of this symbol. unsigned int plt_offset() const { gold_assert(this->has_plt_offset()); return this->plt_offset_; } // Set the PLT offset of this symbol. void set_plt_offset(unsigned int plt_offset) { this->has_plt_offset_ = true; this->plt_offset_ = plt_offset; } // Return true if the final value of this symbol is known at link // time. bool final_value_is_known(const General_options* options) const { if (options->is_shared()) return false; return this->source_ != FROM_OBJECT || !this->object()->is_dynamic(); } // Return whether this is a defined symbol (not undefined or // common). bool is_defined() const { return (this->source_ != FROM_OBJECT || (this->shndx() != elfcpp::SHN_UNDEF && this->shndx() != elfcpp::SHN_COMMON)); } // Return true if this symbol is from a dynamic object. bool is_from_dynobj() const { return this->source_ == FROM_OBJECT && this->object()->is_dynamic(); } // Return whether this is an undefined symbol. bool is_undefined() const { return this->source_ == FROM_OBJECT && this->shndx() == elfcpp::SHN_UNDEF; } // Return whether this is a common symbol. bool is_common() const { return (this->source_ == FROM_OBJECT && (this->shndx() == elfcpp::SHN_COMMON || this->type_ == elfcpp::STT_COMMON)); } // Return whether there should be a warning for references to this // symbol. bool has_warning() const { return this->has_warning_; } // Mark this symbol as having a warning. void set_has_warning() { this->has_warning_ = true; } protected: // Instances of this class should always be created at a specific // size. Symbol() { memset(this, 0, sizeof *this); } // Initialize the general fields. void init_fields(const char* name, const char* version, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis); // Initialize fields from an ELF symbol in OBJECT. template void init_base(const char *name, const char* version, Object* object, const elfcpp::Sym&); // Initialize fields for an Output_data. void init_base(const char* name, Output_data*, elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis, bool offset_is_from_end); // Initialize fields for an Output_segment. void init_base(const char* name, Output_segment* os, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, Segment_offset_base offset_base); // Initialize fields for a constant. void init_base(const char* name, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis); // Override existing symbol. template void override_base(const elfcpp::Sym&, Object* object, const char* version); private: Symbol(const Symbol&); Symbol& operator=(const Symbol&); // Symbol name (expected to point into a Stringpool). const char* name_; // Symbol version (expected to point into a Stringpool). This may // be NULL. const char* version_; union { // This struct is used if SOURCE_ == FROM_OBJECT. struct { // Object in which symbol is defined, or in which it was first // seen. Object* object; // Section number in object_ in which symbol is defined. unsigned int shndx; } from_object; // This struct is used if SOURCE_ == IN_OUTPUT_DATA. struct { // Output_data in which symbol is defined. Before // Layout::finalize the symbol's value is an offset within the // Output_data. Output_data* output_data; // True if the offset is from the end, false if the offset is // from the beginning. bool offset_is_from_end; } in_output_data; // This struct is used if SOURCE_ == IN_OUTPUT_SEGMENT. struct { // Output_segment in which the symbol is defined. Before // Layout::finalize the symbol's value is an offset. Output_segment* output_segment; // The base to use for the offset before Layout::finalize. Segment_offset_base offset_base; } in_output_segment; } u_; // The index of this symbol in the output file. If the symbol is // not going into the output file, this value is -1U. This field // starts as always holding zero. It is set to a non-zero value by // Symbol_table::finalize. unsigned int symtab_index_; // The index of this symbol in the dynamic symbol table. If the // symbol is not going into the dynamic symbol table, this value is // -1U. This field starts as always holding zero. It is set to a // non-zero value during Layout::finalize. unsigned int dynsym_index_; // If this symbol has an entry in the GOT section (has_got_offset_ // is true), this is the offset from the start of the GOT section. unsigned int got_offset_; // If this symbol has an entry in the PLT section (has_plt_offset_ // is true), then this is the offset from the start of the PLT // section. unsigned int plt_offset_; // Symbol type. elfcpp::STT type_ : 4; // Symbol binding. elfcpp::STB binding_ : 4; // Symbol visibility. elfcpp::STV visibility_ : 2; // Rest of symbol st_other field. unsigned int nonvis_ : 6; // The type of symbol. Source source_ : 3; // True if this symbol always requires special target-specific // handling. bool is_target_special_ : 1; // True if this is the default version of the symbol. bool is_def_ : 1; // True if this symbol really forwards to another symbol. This is // used when we discover after the fact that two different entries // in the hash table really refer to the same symbol. This will // never be set for a symbol found in the hash table, but may be set // for a symbol found in the list of symbols attached to an Object. // It forwards to the symbol found in the forwarders_ map of // Symbol_table. bool is_forwarder_ : 1; // True if this symbol needs to be in the dynamic symbol table. bool needs_dynsym_entry_ : 1; // True if we've seen this symbol in a dynamic object. bool in_dyn_ : 1; // True if the symbol has an entry in the GOT section. bool has_got_offset_ : 1; // True if the symbol has an entry in the PLT section. bool has_plt_offset_ : 1; // True if there is a warning for this symbol. bool has_warning_ : 1; }; // The parts of a symbol which are size specific. Using a template // derived class like this helps us use less space on a 32-bit system. template class Sized_symbol : public Symbol { public: typedef typename elfcpp::Elf_types::Elf_Addr Value_type; typedef typename elfcpp::Elf_types::Elf_WXword Size_type; Sized_symbol() { } // Initialize fields from an ELF symbol in OBJECT. template void init(const char *name, const char* version, Object* object, const elfcpp::Sym&); // Initialize fields for an Output_data. void init(const char* name, Output_data*, Value_type value, Size_type symsize, elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis, bool offset_is_from_end); // Initialize fields for an Output_segment. void init(const char* name, Output_segment*, Value_type value, Size_type symsize, elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis, Segment_offset_base offset_base); // Initialize fields for a constant. void init(const char* name, Value_type value, Size_type symsize, elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis); // Override existing symbol. template void override(const elfcpp::Sym&, Object* object, const char* version); // Return the symbol's value. Value_type value() const { return this->value_; } // Return the symbol's size (we can't call this 'size' because that // is a template parameter). Size_type symsize() const { return this->symsize_; } // Set the symbol size. This is used when resolving common symbols. void set_symsize(Size_type symsize) { this->symsize_ = symsize; } // Set the symbol value. This is called when we store the final // values of the symbols into the symbol table. void set_value(Value_type value) { this->value_ = value; } private: Sized_symbol(const Sized_symbol&); Sized_symbol& operator=(const Sized_symbol&); // Symbol value. Before Layout::finalize this is the offset in the // input section. This is set to the final value during // Layout::finalize. Value_type value_; // Symbol size. Size_type symsize_; }; // A struct describing a symbol defined by the linker, where the value // of the symbol is defined based on an output section. This is used // for symbols defined by the linker, like "_init_array_start". struct Define_symbol_in_section { // The symbol name. const char* name; // The name of the output section with which this symbol should be // associated. If there is no output section with that name, the // symbol will be defined as zero. const char* output_section; // The offset of the symbol within the output section. This is an // offset from the start of the output section, unless start_at_end // is true, in which case this is an offset from the end of the // output section. uint64_t value; // The size of the symbol. uint64_t size; // The symbol type. elfcpp::STT type; // The symbol binding. elfcpp::STB binding; // The symbol visibility. elfcpp::STV visibility; // The rest of the st_other field. unsigned char nonvis; // If true, the value field is an offset from the end of the output // section. bool offset_is_from_end; // If true, this symbol is defined only if we see a reference to it. bool only_if_ref; }; // A struct describing a symbol defined by the linker, where the value // of the symbol is defined based on a segment. This is used for // symbols defined by the linker, like "_end". We describe the // segment with which the symbol should be associated by its // characteristics. If no segment meets these characteristics, the // symbol will be defined as zero. If there is more than one segment // which meets these characteristics, we will use the first one. struct Define_symbol_in_segment { // The symbol name. const char* name; // The segment type where the symbol should be defined, typically // PT_LOAD. elfcpp::PT segment_type; // Bitmask of segment flags which must be set. elfcpp::PF segment_flags_set; // Bitmask of segment flags which must be clear. elfcpp::PF segment_flags_clear; // The offset of the symbol within the segment. The offset is // calculated from the position set by offset_base. uint64_t value; // The size of the symbol. uint64_t size; // The symbol type. elfcpp::STT type; // The symbol binding. elfcpp::STB binding; // The symbol visibility. elfcpp::STV visibility; // The rest of the st_other field. unsigned char nonvis; // The base from which we compute the offset. Symbol::Segment_offset_base offset_base; // If true, this symbol is defined only if we see a reference to it. bool only_if_ref; }; // This class manages warnings. Warnings are a GNU extension. When // we see a section named .gnu.warning.SYM in an object file, and if // we wind using the definition of SYM from that object file, then we // will issue a warning for any relocation against SYM from a // different object file. The text of the warning is the contents of // the section. This is not precisely the definition used by the old // GNU linker; the old GNU linker treated an occurrence of // .gnu.warning.SYM as defining a warning symbol. A warning symbol // would trigger a warning on any reference. However, it was // inconsistent in that a warning in a dynamic object only triggered // if there was no definition in a regular object. This linker is // different in that we only issue a warning if we use the symbol // definition from the same object file as the warning section. class Warnings { public: Warnings() : warnings_() { } // Add a warning for symbol NAME in section SHNDX in object OBJ. void add_warning(Symbol_table* symtab, const char* name, Object* obj, unsigned int shndx); // For each symbol for which we should give a warning, make a note // on the symbol. void note_warnings(Symbol_table* symtab); // Issue a warning for a reference to SYM at LOCATION. void issue_warning(const Symbol* sym, const std::string& location) const; private: Warnings(const Warnings&); Warnings& operator=(const Warnings&); // What we need to know to get the warning text. struct Warning_location { // The object the warning is in. Object* object; // The index of the warning section. unsigned int shndx; // The warning text if we have already loaded it. std::string text; Warning_location() : object(NULL), shndx(0), text() { } void set(Object* o, unsigned int s) { this->object = o; this->shndx = s; } void set_text(const char* t, off_t l) { this->text.assign(t, l); } }; // A mapping from warning symbol names (canonicalized in // Symbol_table's namepool_ field) to typedef Unordered_map Warning_table; Warning_table warnings_; }; // The main linker symbol table. class Symbol_table { public: Symbol_table(); ~Symbol_table(); // Add COUNT external symbols from the relocatable object RELOBJ to // the symbol table. SYMS is the symbols, SYM_NAMES is their names, // SYM_NAME_SIZE is the size of SYM_NAMES. This sets SYMPOINTERS to // point to the symbols in the symbol table. template void add_from_relobj(Sized_relobj* relobj, const unsigned char* syms, size_t count, const char* sym_names, size_t sym_name_size, Symbol** sympointers); // Add COUNT dynamic symbols from the dynamic object DYNOBJ to the // symbol table. SYMS is the symbols. SYM_NAMES is their names. // SYM_NAME_SIZE is the size of SYM_NAMES. The other parameters are // symbol version data. template void add_from_dynobj(Sized_dynobj* dynobj, const unsigned char* syms, size_t count, const char* sym_names, size_t sym_name_size, const unsigned char* versym, size_t versym_size, const std::vector*); // Define a special symbol based on an Output_data. It is a // multiple definition error if this symbol is already defined. Symbol* define_in_output_data(const Target*, const char* name, const char* version, Output_data*, uint64_t value, uint64_t symsize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, bool offset_is_from_end, bool only_if_ref); // Define a special symbol based on an Output_segment. It is a // multiple definition error if this symbol is already defined. Symbol* define_in_output_segment(const Target*, const char* name, const char* version, Output_segment*, uint64_t value, uint64_t symsize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, Symbol::Segment_offset_base, bool only_if_ref); // Define a special symbol with a constant value. It is a multiple // definition error if this symbol is already defined. Symbol* define_as_constant(const Target*, const char* name, const char* version, uint64_t value, uint64_t symsize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, bool only_if_ref); // Define a set of symbols in output sections. void define_symbols(const Layout*, const Target*, int count, const Define_symbol_in_section*); // Define a set of symbols in output segments. void define_symbols(const Layout*, const Target*, int count, const Define_symbol_in_segment*); // Look up a symbol. Symbol* lookup(const char*, const char* version = NULL) const; // Return the real symbol associated with the forwarder symbol FROM. Symbol* resolve_forwards(const Symbol* from) const; // Return the bitsize (32 or 64) of the symbols in the table. int get_size() const { return this->size_; } // Return the sized version of a symbol in this table. template Sized_symbol* get_sized_symbol(Symbol* ACCEPT_SIZE) const; template const Sized_symbol* get_sized_symbol(const Symbol* ACCEPT_SIZE) const; // Return the count of undefined symbols seen. int saw_undefined() const { return this->saw_undefined_; } // Allocate the common symbols void allocate_commons(const General_options&, Layout*); // Add a warning for symbol NAME in section SHNDX in object OBJ. void add_warning(const char* name, Object* obj, unsigned int shndx) { this->warnings_.add_warning(this, name, obj, shndx); } // Canonicalize a symbol name for use in the hash table. const char* canonicalize_name(const char* name) { return this->namepool_.add(name, NULL); } // Possibly issue a warning for a reference to SYM at LOCATION which // is in OBJ. void issue_warning(const Symbol* sym, const std::string& location) const { this->warnings_.issue_warning(sym, location); } // Set the dynamic symbol indexes. INDEX is the index of the first // global dynamic symbol. Pointers to the symbols are stored into // the vector. The names are stored into the Stringpool. This // returns an updated dynamic symbol index. unsigned int set_dynsym_indexes(const General_options*, const Target*, unsigned int index, std::vector*, Stringpool*, Versions*); // Finalize the symbol table after we have set the final addresses // of all the input sections. This sets the final symbol indexes, // values and adds the names to *POOL. INDEX is the index of the // first global symbol. OFF is the file offset of the global symbol // table, DYNOFF is the offset of the globals in the dynamic symbol // table, DYN_GLOBAL_INDEX is the index of the first global dynamic // symbol, and DYNCOUNT is the number of global dynamic symbols. // This records the parameters, and returns the new file offset. off_t finalize(unsigned int index, off_t off, off_t dynoff, size_t dyn_global_index, size_t dyncount, Stringpool* pool); // Write out the global symbols. void write_globals(const Target*, const Stringpool*, const Stringpool*, Output_file*) const; // Write out a section symbol. Return the updated offset. void write_section_symbol(const Target*, const Output_section*, Output_file*, off_t) const; private: Symbol_table(const Symbol_table&); Symbol_table& operator=(const Symbol_table&); // Set the size (32 or 64) of the symbols in the table. void set_size(int size) { this->size_ = size; } // Make FROM a forwarder symbol to TO. void make_forwarder(Symbol* from, Symbol* to); // Add a symbol. template Symbol* add_from_object(Object*, const char *name, Stringpool::Key name_key, const char *version, Stringpool::Key version_key, bool def, const elfcpp::Sym& sym); // Resolve symbols. template static void resolve(Sized_symbol* to, const elfcpp::Sym& sym, Object*, const char* version); template static void resolve(Sized_symbol* to, const Sized_symbol* from, const char* version ACCEPT_SIZE_ENDIAN); // Define a special symbol. template Sized_symbol* define_special_symbol(const Target* target, const char* name, const char* version, bool only_if_ref ACCEPT_SIZE_ENDIAN); // Define a symbol in an Output_data, sized version. template Sized_symbol* do_define_in_output_data(const Target*, const char* name, const char* version, Output_data*, typename elfcpp::Elf_types::Elf_Addr value, typename elfcpp::Elf_types::Elf_WXword ssize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, bool offset_is_from_end, bool only_if_ref); // Define a symbol in an Output_segment, sized version. template Sized_symbol* do_define_in_output_segment( const Target*, const char* name, const char* version, Output_segment* os, typename elfcpp::Elf_types::Elf_Addr value, typename elfcpp::Elf_types::Elf_WXword ssize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, Symbol::Segment_offset_base offset_base, bool only_if_ref); // Define a symbol as a constant, sized version. template Sized_symbol* do_define_as_constant( const Target*, const char* name, const char* version, typename elfcpp::Elf_types::Elf_Addr value, typename elfcpp::Elf_types::Elf_WXword ssize, elfcpp::STT type, elfcpp::STB binding, elfcpp::STV visibility, unsigned char nonvis, bool only_if_ref); // Allocate the common symbols, sized version. template void do_allocate_commons(const General_options&, Layout*); // Finalize symbols specialized for size. template off_t sized_finalize(unsigned int, off_t, Stringpool*); // Write globals specialized for size and endianness. template void sized_write_globals(const Target*, const Stringpool*, const Stringpool*, Output_file*) const; // Write out a symbol to P. template void sized_write_symbol(Sized_symbol*, unsigned int shndx, const Stringpool*, unsigned char* p ACCEPT_SIZE_ENDIAN) const; // Write out a section symbol, specialized for size and endianness. template void sized_write_section_symbol(const Output_section*, Output_file*, off_t) const; // The type of the symbol hash table. typedef std::pair Symbol_table_key; struct Symbol_table_hash { size_t operator()(const Symbol_table_key&) const; }; struct Symbol_table_eq { bool operator()(const Symbol_table_key&, const Symbol_table_key&) const; }; typedef Unordered_map Symbol_table_type; // The type of the list of common symbols. typedef std::vector Commons_type; // The size of the symbols in the symbol table (32 or 64). int size_; // We increment this every time we see a new undefined symbol, for // use in archive groups. int saw_undefined_; // The index of the first global symbol in the output file. unsigned int first_global_index_; // The file offset within the output symtab section where we should // write the table. off_t offset_; // The number of global symbols we want to write out. size_t output_count_; // The file offset of the global dynamic symbols, or 0 if none. off_t dynamic_offset_; // The index of the first global dynamic symbol. unsigned int first_dynamic_global_index_; // The number of global dynamic symbols, or 0 if none. off_t dynamic_count_; // The symbol hash table. Symbol_table_type table_; // A pool of symbol names. This is used for all global symbols. // Entries in the hash table point into this pool. Stringpool namepool_; // Forwarding symbols. Unordered_map forwarders_; // We don't expect there to be very many common symbols, so we keep // a list of them. When we find a common symbol we add it to this // list. It is possible that by the time we process the list the // symbol is no longer a common symbol. It may also have become a // forwarder. Commons_type commons_; // Manage symbol warnings. Warnings warnings_; }; // We inline get_sized_symbol for efficiency. template Sized_symbol* Symbol_table::get_sized_symbol(Symbol* sym ACCEPT_SIZE) const { gold_assert(size == this->get_size()); return static_cast*>(sym); } template const Sized_symbol* Symbol_table::get_sized_symbol(const Symbol* sym ACCEPT_SIZE) const { gold_assert(size == this->get_size()); return static_cast*>(sym); } } // End namespace gold. #endif // !defined(GOLD_SYMTAB_H)