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Snapshot. Includes first cut at output relocation sections.

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This commit is contained in:
Ian Lance Taylor
2006-11-16 00:38:25 +00:00
parent 7495b3afc0
commit c06b7b0ba3
17 changed files with 885 additions and 179 deletions
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88
gold/symtab.h
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@ -173,6 +173,17 @@ class Symbol
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; }
// Return whether this symbol was ever seen in a dynamic object.
bool
in_dyn() const
@ -183,6 +194,46 @@ class Symbol
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
{
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)
{
assert(index != 0);
this->symtab_index_ = index;
}
// 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
{
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)
{
assert(index != 0);
this->dynsym_index_ = index;
}
// Return whether this symbol has an entry in the GOT section.
bool
has_got_offset() const
@ -334,9 +385,22 @@ class Symbol
} 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.
// is true), this is the offset from the start of the GOT section.
unsigned int got_offset_;
// Symbol type.
elfcpp::STT type_ : 4;
// Symbol binding.
@ -360,6 +424,8 @@ class Symbol
// 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.
@ -548,7 +614,7 @@ class Warnings
// Issue a warning for a reference to SYM at LOCATION.
void
issue_warning(Symbol* sym, const std::string& location) const;
issue_warning(const Symbol* sym, const std::string& location) const;
private:
Warnings(const Warnings&);
@ -667,7 +733,7 @@ class Symbol_table
// Return the real symbol associated with the forwarder symbol FROM.
Symbol*
resolve_forwards(Symbol* from) const;
resolve_forwards(const Symbol* from) const;
// Return the size of the symbols in the table.
int
@ -705,15 +771,16 @@ class Symbol_table
// Possibly issue a warning for a reference to SYM at LOCATION which
// is in OBJ.
void
issue_warning(Symbol* sym, const std::string& location) const
issue_warning(const Symbol* sym, const std::string& location) const
{ this->warnings_.issue_warning(sym, location); }
// Finalize the symbol table after we have set the final addresses
// of all the input sections. This sets the final symbol values and
// adds the names to *POOL. It records the file offset OFF, and
// 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. This records the file offset OFF, and
// returns the new file offset.
off_t
finalize(off_t, Stringpool*);
finalize(unsigned int index, off_t off, Stringpool* pool);
// Write out the global symbols.
void
@ -791,7 +858,7 @@ class Symbol_table
// Finalize symbols specialized for size.
template<int size>
off_t
sized_finalize(off_t, Stringpool*);
sized_finalize(unsigned int, off_t, Stringpool*);
// Write globals specialized for size and endianness.
template<int size, bool big_endian>
@ -828,6 +895,9 @@ class Symbol_table
// 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_;
@ -843,7 +913,7 @@ class Symbol_table
Stringpool namepool_;
// Forwarding symbols.
Unordered_map<Symbol*, Symbol*> forwarders_;
Unordered_map<const Symbol*, Symbol*> 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