1 // symtab.h -- the gold symbol table -*- C++ -*-
11 #include "stringpool.h"
22 template<int size
, bool big_endian
>
25 template<int size
, bool big_endian
>
34 // The base class of an entry in the symbol table. The symbol table
35 // can have a lot of entries, so we don't want this class to big.
36 // Size dependent fields can be found in the template class
37 // Sized_symbol. Targets may support their own derived classes.
42 // Because we want the class to be small, we don't use any virtual
43 // functions. But because symbols can be defined in different
44 // places, we need to classify them. This enum is the different
45 // sources of symbols we support.
48 // Symbol defined in a relocatable or dynamic input file--this is
49 // the most common case.
51 // Symbol defined in an Output_data, a special section created by
54 // Symbol defined in an Output_segment, with no associated
57 // Symbol value is constant.
61 // When the source is IN_OUTPUT_SEGMENT, we need to describe what
63 enum Segment_offset_base
65 // From the start of the segment.
67 // From the end of the segment.
69 // From the filesz of the segment--i.e., after the loaded bytes
70 // but before the bytes which are allocated but zeroed.
74 // Return the symbol name.
77 { return this->name_
; }
79 // Return the symbol version. This will return NULL for an
80 // unversioned symbol.
83 { return this->version_
; }
85 // Return the symbol source.
88 { return this->source_
; }
90 // Return the object with which this symbol is associated.
94 gold_assert(this->source_
== FROM_OBJECT
);
95 return this->u_
.from_object
.object
;
98 // Return the index of the section in the input relocatable or
99 // dynamic object file.
103 gold_assert(this->source_
== FROM_OBJECT
);
104 return this->u_
.from_object
.shndx
;
107 // Return the output data section with which this symbol is
108 // associated, if the symbol was specially defined with respect to
109 // an output data section.
113 gold_assert(this->source_
== IN_OUTPUT_DATA
);
114 return this->u_
.in_output_data
.output_data
;
117 // If this symbol was defined with respect to an output data
118 // section, return whether the value is an offset from end.
120 offset_is_from_end() const
122 gold_assert(this->source_
== IN_OUTPUT_DATA
);
123 return this->u_
.in_output_data
.offset_is_from_end
;
126 // Return the output segment with which this symbol is associated,
127 // if the symbol was specially defined with respect to an output
130 output_segment() const
132 gold_assert(this->source_
== IN_OUTPUT_SEGMENT
);
133 return this->u_
.in_output_segment
.output_segment
;
136 // If this symbol was defined with respect to an output segment,
137 // return the offset base.
141 gold_assert(this->source_
== IN_OUTPUT_SEGMENT
);
142 return this->u_
.in_output_segment
.offset_base
;
145 // Return the symbol binding.
148 { return this->binding_
; }
150 // Return the symbol type.
153 { return this->type_
; }
155 // Return the symbol visibility.
158 { return this->visibility_
; }
160 // Return the non-visibility part of the st_other field.
163 { return this->nonvis_
; }
165 // Return whether this symbol is a forwarder. This will never be
166 // true of a symbol found in the hash table, but may be true of
167 // symbol pointers attached to object files.
170 { return this->is_forwarder_
; }
172 // Mark this symbol as a forwarder.
175 { this->is_forwarder_
= true; }
177 // Return whether this symbol needs an entry in the dynamic symbol
180 needs_dynsym_entry() const
182 return (this->needs_dynsym_entry_
183 || (this->in_reg() && this->in_dyn()));
186 // Mark this symbol as needing an entry in the dynamic symbol table.
188 set_needs_dynsym_entry()
189 { this->needs_dynsym_entry_
= true; }
191 // Return whether this symbol has been seen in a regular object.
194 { return this->in_reg_
; }
196 // Mark this symbol as having been seen in a regular object.
199 { this->in_reg_
= true; }
201 // Return whether this symbol has been seen in a dynamic object.
204 { return this->in_dyn_
; }
206 // Mark this symbol as having been seen in a dynamic object.
209 { this->in_dyn_
= true; }
211 // Return the index of this symbol in the output file symbol table.
212 // A value of -1U means that this symbol is not going into the
213 // output file. This starts out as zero, and is set to a non-zero
214 // value by Symbol_table::finalize. It is an error to ask for the
215 // symbol table index before it has been set.
219 gold_assert(this->symtab_index_
!= 0);
220 return this->symtab_index_
;
223 // Set the index of the symbol in the output file symbol table.
225 set_symtab_index(unsigned int index
)
227 gold_assert(index
!= 0);
228 this->symtab_index_
= index
;
231 // Return whether this symbol already has an index in the output
232 // file symbol table.
234 has_symtab_index() const
235 { return this->symtab_index_
!= 0; }
237 // Return the index of this symbol in the dynamic symbol table. A
238 // value of -1U means that this symbol is not going into the dynamic
239 // symbol table. This starts out as zero, and is set to a non-zero
240 // during Layout::finalize. It is an error to ask for the dynamic
241 // symbol table index before it has been set.
245 gold_assert(this->dynsym_index_
!= 0);
246 return this->dynsym_index_
;
249 // Set the index of the symbol in the dynamic symbol table.
251 set_dynsym_index(unsigned int index
)
253 gold_assert(index
!= 0);
254 this->dynsym_index_
= index
;
257 // Return whether this symbol already has an index in the dynamic
260 has_dynsym_index() const
261 { return this->dynsym_index_
!= 0; }
263 // Return whether this symbol has an entry in the GOT section.
265 has_got_offset() const
266 { return this->has_got_offset_
; }
268 // Return the offset into the GOT section of this symbol.
272 gold_assert(this->has_got_offset());
273 return this->got_offset_
;
276 // Set the GOT offset of this symbol.
278 set_got_offset(unsigned int got_offset
)
280 this->has_got_offset_
= true;
281 this->got_offset_
= got_offset
;
284 // Return whether this symbol has an entry in the PLT section.
286 has_plt_offset() const
287 { return this->has_plt_offset_
; }
289 // Return the offset into the PLT section of this symbol.
293 gold_assert(this->has_plt_offset());
294 return this->plt_offset_
;
297 // Set the PLT offset of this symbol.
299 set_plt_offset(unsigned int plt_offset
)
301 this->has_plt_offset_
= true;
302 this->plt_offset_
= plt_offset
;
305 // Return true if the final value of this symbol is known at link
308 final_value_is_known(const General_options
* options
) const
310 if (options
->is_shared())
312 return this->source_
!= FROM_OBJECT
|| !this->object()->is_dynamic();
315 // Return whether this is a defined symbol (not undefined or
320 return (this->source_
!= FROM_OBJECT
321 || (this->shndx() != elfcpp::SHN_UNDEF
322 && this->shndx() != elfcpp::SHN_COMMON
));
325 // Return true if this symbol is from a dynamic object.
327 is_from_dynobj() const
329 return this->source_
== FROM_OBJECT
&& this->object()->is_dynamic();
332 // Return whether this is an undefined symbol.
336 return this->source_
== FROM_OBJECT
&& this->shndx() == elfcpp::SHN_UNDEF
;
339 // Return whether this is a common symbol.
343 return (this->source_
== FROM_OBJECT
344 && (this->shndx() == elfcpp::SHN_COMMON
345 || this->type_
== elfcpp::STT_COMMON
));
348 // Return whether this symbol can be seen outside this object.
350 is_externally_visible() const
352 return (this->visibility_
== elfcpp::STV_DEFAULT
353 || this->visibility_
== elfcpp::STV_PROTECTED
);
356 // Return whether there should be a warning for references to this
360 { return this->has_warning_
; }
362 // Mark this symbol as having a warning.
365 { this->has_warning_
= true; }
368 // Instances of this class should always be created at a specific
371 { memset(this, 0, sizeof *this); }
373 // Initialize the general fields.
375 init_fields(const char* name
, const char* version
,
376 elfcpp::STT type
, elfcpp::STB binding
,
377 elfcpp::STV visibility
, unsigned char nonvis
);
379 // Initialize fields from an ELF symbol in OBJECT.
380 template<int size
, bool big_endian
>
382 init_base(const char *name
, const char* version
, Object
* object
,
383 const elfcpp::Sym
<size
, big_endian
>&);
385 // Initialize fields for an Output_data.
387 init_base(const char* name
, Output_data
*, elfcpp::STT
, elfcpp::STB
,
388 elfcpp::STV
, unsigned char nonvis
, bool offset_is_from_end
);
390 // Initialize fields for an Output_segment.
392 init_base(const char* name
, Output_segment
* os
, elfcpp::STT type
,
393 elfcpp::STB binding
, elfcpp::STV visibility
,
394 unsigned char nonvis
, Segment_offset_base offset_base
);
396 // Initialize fields for a constant.
398 init_base(const char* name
, elfcpp::STT type
, elfcpp::STB binding
,
399 elfcpp::STV visibility
, unsigned char nonvis
);
401 // Override existing symbol.
402 template<int size
, bool big_endian
>
404 override_base(const elfcpp::Sym
<size
, big_endian
>&, Object
* object
,
405 const char* version
);
407 // Override existing symbol with a special symbol.
409 override_base_with_special(const Symbol
* from
);
412 Symbol(const Symbol
&);
413 Symbol
& operator=(const Symbol
&);
415 // Symbol name (expected to point into a Stringpool).
417 // Symbol version (expected to point into a Stringpool). This may
419 const char* version_
;
423 // This struct is used if SOURCE_ == FROM_OBJECT.
426 // Object in which symbol is defined, or in which it was first
429 // Section number in object_ in which symbol is defined.
433 // This struct is used if SOURCE_ == IN_OUTPUT_DATA.
436 // Output_data in which symbol is defined. Before
437 // Layout::finalize the symbol's value is an offset within the
439 Output_data
* output_data
;
440 // True if the offset is from the end, false if the offset is
441 // from the beginning.
442 bool offset_is_from_end
;
445 // This struct is used if SOURCE_ == IN_OUTPUT_SEGMENT.
448 // Output_segment in which the symbol is defined. Before
449 // Layout::finalize the symbol's value is an offset.
450 Output_segment
* output_segment
;
451 // The base to use for the offset before Layout::finalize.
452 Segment_offset_base offset_base
;
456 // The index of this symbol in the output file. If the symbol is
457 // not going into the output file, this value is -1U. This field
458 // starts as always holding zero. It is set to a non-zero value by
459 // Symbol_table::finalize.
460 unsigned int symtab_index_
;
462 // The index of this symbol in the dynamic symbol table. If the
463 // symbol is not going into the dynamic symbol table, this value is
464 // -1U. This field starts as always holding zero. It is set to a
465 // non-zero value during Layout::finalize.
466 unsigned int dynsym_index_
;
468 // If this symbol has an entry in the GOT section (has_got_offset_
469 // is true), this is the offset from the start of the GOT section.
470 unsigned int got_offset_
;
472 // If this symbol has an entry in the PLT section (has_plt_offset_
473 // is true), then this is the offset from the start of the PLT
475 unsigned int plt_offset_
;
478 elfcpp::STT type_
: 4;
480 elfcpp::STB binding_
: 4;
481 // Symbol visibility.
482 elfcpp::STV visibility_
: 2;
483 // Rest of symbol st_other field.
484 unsigned int nonvis_
: 6;
485 // The type of symbol.
487 // True if this symbol always requires special target-specific
489 bool is_target_special_
: 1;
490 // True if this is the default version of the symbol.
492 // True if this symbol really forwards to another symbol. This is
493 // used when we discover after the fact that two different entries
494 // in the hash table really refer to the same symbol. This will
495 // never be set for a symbol found in the hash table, but may be set
496 // for a symbol found in the list of symbols attached to an Object.
497 // It forwards to the symbol found in the forwarders_ map of
499 bool is_forwarder_
: 1;
500 // True if this symbol needs to be in the dynamic symbol table.
501 bool needs_dynsym_entry_
: 1;
502 // True if we've seen this symbol in a regular object.
504 // True if we've seen this symbol in a dynamic object.
506 // True if the symbol has an entry in the GOT section.
507 bool has_got_offset_
: 1;
508 // True if the symbol has an entry in the PLT section.
509 bool has_plt_offset_
: 1;
510 // True if there is a warning for this symbol.
511 bool has_warning_
: 1;
514 // The parts of a symbol which are size specific. Using a template
515 // derived class like this helps us use less space on a 32-bit system.
518 class Sized_symbol
: public Symbol
521 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Value_type
;
522 typedef typename
elfcpp::Elf_types
<size
>::Elf_WXword Size_type
;
527 // Initialize fields from an ELF symbol in OBJECT.
528 template<bool big_endian
>
530 init(const char *name
, const char* version
, Object
* object
,
531 const elfcpp::Sym
<size
, big_endian
>&);
533 // Initialize fields for an Output_data.
535 init(const char* name
, Output_data
*, Value_type value
, Size_type symsize
,
536 elfcpp::STT
, elfcpp::STB
, elfcpp::STV
, unsigned char nonvis
,
537 bool offset_is_from_end
);
539 // Initialize fields for an Output_segment.
541 init(const char* name
, Output_segment
*, Value_type value
, Size_type symsize
,
542 elfcpp::STT
, elfcpp::STB
, elfcpp::STV
, unsigned char nonvis
,
543 Segment_offset_base offset_base
);
545 // Initialize fields for a constant.
547 init(const char* name
, Value_type value
, Size_type symsize
,
548 elfcpp::STT
, elfcpp::STB
, elfcpp::STV
, unsigned char nonvis
);
550 // Override existing symbol.
551 template<bool big_endian
>
553 override(const elfcpp::Sym
<size
, big_endian
>&, Object
* object
,
554 const char* version
);
556 // Override existing symbol with a special symbol.
558 override_with_special(const Sized_symbol
<size
>*);
560 // Return the symbol's value.
563 { return this->value_
; }
565 // Return the symbol's size (we can't call this 'size' because that
566 // is a template parameter).
569 { return this->symsize_
; }
571 // Set the symbol size. This is used when resolving common symbols.
573 set_symsize(Size_type symsize
)
574 { this->symsize_
= symsize
; }
576 // Set the symbol value. This is called when we store the final
577 // values of the symbols into the symbol table.
579 set_value(Value_type value
)
580 { this->value_
= value
; }
583 Sized_symbol(const Sized_symbol
&);
584 Sized_symbol
& operator=(const Sized_symbol
&);
586 // Symbol value. Before Layout::finalize this is the offset in the
587 // input section. This is set to the final value during
594 // A struct describing a symbol defined by the linker, where the value
595 // of the symbol is defined based on an output section. This is used
596 // for symbols defined by the linker, like "_init_array_start".
598 struct Define_symbol_in_section
602 // The name of the output section with which this symbol should be
603 // associated. If there is no output section with that name, the
604 // symbol will be defined as zero.
605 const char* output_section
;
606 // The offset of the symbol within the output section. This is an
607 // offset from the start of the output section, unless start_at_end
608 // is true, in which case this is an offset from the end of the
611 // The size of the symbol.
615 // The symbol binding.
617 // The symbol visibility.
618 elfcpp::STV visibility
;
619 // The rest of the st_other field.
620 unsigned char nonvis
;
621 // If true, the value field is an offset from the end of the output
623 bool offset_is_from_end
;
624 // If true, this symbol is defined only if we see a reference to it.
628 // A struct describing a symbol defined by the linker, where the value
629 // of the symbol is defined based on a segment. This is used for
630 // symbols defined by the linker, like "_end". We describe the
631 // segment with which the symbol should be associated by its
632 // characteristics. If no segment meets these characteristics, the
633 // symbol will be defined as zero. If there is more than one segment
634 // which meets these characteristics, we will use the first one.
636 struct Define_symbol_in_segment
640 // The segment type where the symbol should be defined, typically
642 elfcpp::PT segment_type
;
643 // Bitmask of segment flags which must be set.
644 elfcpp::PF segment_flags_set
;
645 // Bitmask of segment flags which must be clear.
646 elfcpp::PF segment_flags_clear
;
647 // The offset of the symbol within the segment. The offset is
648 // calculated from the position set by offset_base.
650 // The size of the symbol.
654 // The symbol binding.
656 // The symbol visibility.
657 elfcpp::STV visibility
;
658 // The rest of the st_other field.
659 unsigned char nonvis
;
660 // The base from which we compute the offset.
661 Symbol::Segment_offset_base offset_base
;
662 // If true, this symbol is defined only if we see a reference to it.
666 // This class manages warnings. Warnings are a GNU extension. When
667 // we see a section named .gnu.warning.SYM in an object file, and if
668 // we wind using the definition of SYM from that object file, then we
669 // will issue a warning for any relocation against SYM from a
670 // different object file. The text of the warning is the contents of
671 // the section. This is not precisely the definition used by the old
672 // GNU linker; the old GNU linker treated an occurrence of
673 // .gnu.warning.SYM as defining a warning symbol. A warning symbol
674 // would trigger a warning on any reference. However, it was
675 // inconsistent in that a warning in a dynamic object only triggered
676 // if there was no definition in a regular object. This linker is
677 // different in that we only issue a warning if we use the symbol
678 // definition from the same object file as the warning section.
687 // Add a warning for symbol NAME in section SHNDX in object OBJ.
689 add_warning(Symbol_table
* symtab
, const char* name
, Object
* obj
,
692 // For each symbol for which we should give a warning, make a note
695 note_warnings(Symbol_table
* symtab
);
697 // Issue a warning for a reference to SYM at LOCATION.
699 issue_warning(const Symbol
* sym
, const std::string
& location
) const;
702 Warnings(const Warnings
&);
703 Warnings
& operator=(const Warnings
&);
705 // What we need to know to get the warning text.
706 struct Warning_location
708 // The object the warning is in.
710 // The index of the warning section.
712 // The warning text if we have already loaded it.
716 : object(NULL
), shndx(0), text()
720 set(Object
* o
, unsigned int s
)
727 set_text(const char* t
, off_t l
)
728 { this->text
.assign(t
, l
); }
731 // A mapping from warning symbol names (canonicalized in
732 // Symbol_table's namepool_ field) to
733 typedef Unordered_map
<const char*, Warning_location
> Warning_table
;
735 Warning_table warnings_
;
738 // The main linker symbol table.
747 // Add COUNT external symbols from the relocatable object RELOBJ to
748 // the symbol table. SYMS is the symbols, SYM_NAMES is their names,
749 // SYM_NAME_SIZE is the size of SYM_NAMES. This sets SYMPOINTERS to
750 // point to the symbols in the symbol table.
751 template<int size
, bool big_endian
>
753 add_from_relobj(Sized_relobj
<size
, big_endian
>* relobj
,
754 const unsigned char* syms
, size_t count
,
755 const char* sym_names
, size_t sym_name_size
,
756 Symbol
** sympointers
);
758 // Add COUNT dynamic symbols from the dynamic object DYNOBJ to the
759 // symbol table. SYMS is the symbols. SYM_NAMES is their names.
760 // SYM_NAME_SIZE is the size of SYM_NAMES. The other parameters are
761 // symbol version data.
762 template<int size
, bool big_endian
>
764 add_from_dynobj(Sized_dynobj
<size
, big_endian
>* dynobj
,
765 const unsigned char* syms
, size_t count
,
766 const char* sym_names
, size_t sym_name_size
,
767 const unsigned char* versym
, size_t versym_size
,
768 const std::vector
<const char*>*);
770 // Define a special symbol based on an Output_data. It is a
771 // multiple definition error if this symbol is already defined.
773 define_in_output_data(const Target
*, const char* name
, const char* version
,
774 Output_data
*, uint64_t value
, uint64_t symsize
,
775 elfcpp::STT type
, elfcpp::STB binding
,
776 elfcpp::STV visibility
, unsigned char nonvis
,
777 bool offset_is_from_end
, bool only_if_ref
);
779 // Define a special symbol based on an Output_segment. It is a
780 // multiple definition error if this symbol is already defined.
782 define_in_output_segment(const Target
*, const char* name
,
783 const char* version
, Output_segment
*,
784 uint64_t value
, uint64_t symsize
,
785 elfcpp::STT type
, elfcpp::STB binding
,
786 elfcpp::STV visibility
, unsigned char nonvis
,
787 Symbol::Segment_offset_base
, bool only_if_ref
);
789 // Define a special symbol with a constant value. It is a multiple
790 // definition error if this symbol is already defined.
792 define_as_constant(const Target
*, const char* name
, const char* version
,
793 uint64_t value
, uint64_t symsize
, elfcpp::STT type
,
794 elfcpp::STB binding
, elfcpp::STV visibility
,
795 unsigned char nonvis
, bool only_if_ref
);
797 // Define a set of symbols in output sections.
799 define_symbols(const Layout
*, const Target
*, int count
,
800 const Define_symbol_in_section
*);
802 // Define a set of symbols in output segments.
804 define_symbols(const Layout
*, const Target
*, int count
,
805 const Define_symbol_in_segment
*);
809 lookup(const char*, const char* version
= NULL
) const;
811 // Return the real symbol associated with the forwarder symbol FROM.
813 resolve_forwards(const Symbol
* from
) const;
815 // Return the bitsize (32 or 64) of the symbols in the table.
818 { return this->size_
; }
820 // Return the sized version of a symbol in this table.
823 get_sized_symbol(Symbol
* ACCEPT_SIZE
) const;
826 const Sized_symbol
<size
>*
827 get_sized_symbol(const Symbol
* ACCEPT_SIZE
) const;
829 // Return the count of undefined symbols seen.
831 saw_undefined() const
832 { return this->saw_undefined_
; }
834 // Allocate the common symbols
836 allocate_commons(const General_options
&, Layout
*);
838 // Add a warning for symbol NAME in section SHNDX in object OBJ.
840 add_warning(const char* name
, Object
* obj
, unsigned int shndx
)
841 { this->warnings_
.add_warning(this, name
, obj
, shndx
); }
843 // Canonicalize a symbol name for use in the hash table.
845 canonicalize_name(const char* name
)
846 { return this->namepool_
.add(name
, NULL
); }
848 // Possibly issue a warning for a reference to SYM at LOCATION which
851 issue_warning(const Symbol
* sym
, const std::string
& location
) const
852 { this->warnings_
.issue_warning(sym
, location
); }
854 // Set the dynamic symbol indexes. INDEX is the index of the first
855 // global dynamic symbol. Pointers to the symbols are stored into
856 // the vector. The names are stored into the Stringpool. This
857 // returns an updated dynamic symbol index.
859 set_dynsym_indexes(const General_options
*, const Target
*, unsigned int index
,
860 std::vector
<Symbol
*>*, Stringpool
*, Versions
*);
862 // Finalize the symbol table after we have set the final addresses
863 // of all the input sections. This sets the final symbol indexes,
864 // values and adds the names to *POOL. INDEX is the index of the
865 // first global symbol. OFF is the file offset of the global symbol
866 // table, DYNOFF is the offset of the globals in the dynamic symbol
867 // table, DYN_GLOBAL_INDEX is the index of the first global dynamic
868 // symbol, and DYNCOUNT is the number of global dynamic symbols.
869 // This records the parameters, and returns the new file offset.
871 finalize(unsigned int index
, off_t off
, off_t dynoff
,
872 size_t dyn_global_index
, size_t dyncount
, Stringpool
* pool
);
874 // Write out the global symbols.
876 write_globals(const Target
*, const Stringpool
*, const Stringpool
*,
879 // Write out a section symbol. Return the updated offset.
881 write_section_symbol(const Target
*, const Output_section
*, Output_file
*,
885 Symbol_table(const Symbol_table
&);
886 Symbol_table
& operator=(const Symbol_table
&);
888 // Set the size (32 or 64) of the symbols in the table.
891 { this->size_
= size
; }
893 // Make FROM a forwarder symbol to TO.
895 make_forwarder(Symbol
* from
, Symbol
* to
);
898 template<int size
, bool big_endian
>
900 add_from_object(Object
*, const char *name
, Stringpool::Key name_key
,
901 const char *version
, Stringpool::Key version_key
,
902 bool def
, const elfcpp::Sym
<size
, big_endian
>& sym
);
905 template<int size
, bool big_endian
>
907 resolve(Sized_symbol
<size
>* to
,
908 const elfcpp::Sym
<size
, big_endian
>& sym
,
909 Object
*, const char* version
);
911 template<int size
, bool big_endian
>
913 resolve(Sized_symbol
<size
>* to
, const Sized_symbol
<size
>* from
,
914 const char* version ACCEPT_SIZE_ENDIAN
);
916 // Whether we should override a symbol, based on flags in
919 should_override(const Symbol
*, unsigned int, bool*);
921 // Whether we should override a symbol with a special symbol which
922 // is automatically defined by the linker.
924 should_override_with_special(const Symbol
*);
926 // Define a special symbol.
927 template<int size
, bool big_endian
>
929 define_special_symbol(const Target
* target
, const char* name
,
930 const char* version
, bool only_if_ref
,
931 Sized_symbol
<size
>** poldsym ACCEPT_SIZE_ENDIAN
);
933 // Define a symbol in an Output_data, sized version.
936 do_define_in_output_data(const Target
*, const char* name
,
937 const char* version
, Output_data
*,
938 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
939 typename
elfcpp::Elf_types
<size
>::Elf_WXword ssize
,
940 elfcpp::STT type
, elfcpp::STB binding
,
941 elfcpp::STV visibility
, unsigned char nonvis
,
942 bool offset_is_from_end
, bool only_if_ref
);
944 // Define a symbol in an Output_segment, sized version.
947 do_define_in_output_segment(
948 const Target
*, const char* name
, const char* version
, Output_segment
* os
,
949 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
950 typename
elfcpp::Elf_types
<size
>::Elf_WXword ssize
,
951 elfcpp::STT type
, elfcpp::STB binding
,
952 elfcpp::STV visibility
, unsigned char nonvis
,
953 Symbol::Segment_offset_base offset_base
, bool only_if_ref
);
955 // Define a symbol as a constant, sized version.
958 do_define_as_constant(
959 const Target
*, const char* name
, const char* version
,
960 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
961 typename
elfcpp::Elf_types
<size
>::Elf_WXword ssize
,
962 elfcpp::STT type
, elfcpp::STB binding
,
963 elfcpp::STV visibility
, unsigned char nonvis
,
966 // Allocate the common symbols, sized version.
969 do_allocate_commons(const General_options
&, Layout
*);
971 // Finalize symbols specialized for size.
974 sized_finalize(unsigned int, off_t
, Stringpool
*);
976 // Write globals specialized for size and endianness.
977 template<int size
, bool big_endian
>
979 sized_write_globals(const Target
*, const Stringpool
*, const Stringpool
*,
982 // Write out a symbol to P.
983 template<int size
, bool big_endian
>
985 sized_write_symbol(Sized_symbol
<size
>*, unsigned int shndx
,
986 const Stringpool
*, unsigned char* p
987 ACCEPT_SIZE_ENDIAN
) const;
989 // Write out a section symbol, specialized for size and endianness.
990 template<int size
, bool big_endian
>
992 sized_write_section_symbol(const Output_section
*, Output_file
*, off_t
) const;
994 // The type of the symbol hash table.
996 typedef std::pair
<Stringpool::Key
, Stringpool::Key
> Symbol_table_key
;
998 struct Symbol_table_hash
1001 operator()(const Symbol_table_key
&) const;
1004 struct Symbol_table_eq
1007 operator()(const Symbol_table_key
&, const Symbol_table_key
&) const;
1010 typedef Unordered_map
<Symbol_table_key
, Symbol
*, Symbol_table_hash
,
1011 Symbol_table_eq
> Symbol_table_type
;
1013 // The type of the list of common symbols.
1015 typedef std::vector
<Symbol
*> Commons_type
;
1017 // The size of the symbols in the symbol table (32 or 64).
1020 // We increment this every time we see a new undefined symbol, for
1021 // use in archive groups.
1024 // The index of the first global symbol in the output file.
1025 unsigned int first_global_index_
;
1027 // The file offset within the output symtab section where we should
1031 // The number of global symbols we want to write out.
1032 size_t output_count_
;
1034 // The file offset of the global dynamic symbols, or 0 if none.
1035 off_t dynamic_offset_
;
1037 // The index of the first global dynamic symbol.
1038 unsigned int first_dynamic_global_index_
;
1040 // The number of global dynamic symbols, or 0 if none.
1041 off_t dynamic_count_
;
1043 // The symbol hash table.
1044 Symbol_table_type table_
;
1046 // A pool of symbol names. This is used for all global symbols.
1047 // Entries in the hash table point into this pool.
1048 Stringpool namepool_
;
1050 // Forwarding symbols.
1051 Unordered_map
<const Symbol
*, Symbol
*> forwarders_
;
1053 // We don't expect there to be very many common symbols, so we keep
1054 // a list of them. When we find a common symbol we add it to this
1055 // list. It is possible that by the time we process the list the
1056 // symbol is no longer a common symbol. It may also have become a
1058 Commons_type commons_
;
1060 // Manage symbol warnings.
1064 // We inline get_sized_symbol for efficiency.
1068 Symbol_table::get_sized_symbol(Symbol
* sym ACCEPT_SIZE
) const
1070 gold_assert(size
== this->get_size());
1071 return static_cast<Sized_symbol
<size
>*>(sym
);
1075 const Sized_symbol
<size
>*
1076 Symbol_table::get_sized_symbol(const Symbol
* sym ACCEPT_SIZE
) const
1078 gold_assert(size
== this->get_size());
1079 return static_cast<const Sized_symbol
<size
>*>(sym
);
1082 } // End namespace gold.
1084 #endif // !defined(GOLD_SYMTAB_H)