#ifndef GOLD_OUTPUT_H
#define GOLD_OUTPUT_H
-#include <cassert>
#include <list>
#include <vector>
class General_options;
class Object;
+class Symbol;
class Output_file;
class Output_section;
+class Target;
template<int size, bool big_endian>
class Sized_target;
template<int size, bool big_endian>
write(Output_file* file)
{ this->do_write(file); }
+ // This is called by Layout::finalize to note that all sizes must
+ // now be fixed.
+ static void
+ layout_complete()
+ { Output_data::sizes_are_fixed = true; }
+
protected:
// Functions that child classes may or in some cases must implement.
// Return the output section index, if there is an output section.
virtual unsigned int
do_out_shndx() const
- { abort(); }
+ { gold_unreachable(); }
// Set the output section index, if this is an output section.
virtual void
do_set_out_shndx(unsigned int)
- { abort(); }
+ { gold_unreachable(); }
// Set the address and file offset of the data. This only needs to
- // be implemented if the child needs to know.
+ // be implemented if the child needs to know. The child class can
+ // set its size in this call.
virtual void
do_set_address(uint64_t, off_t)
{ }
// Set the size of the data.
void
set_data_size(off_t data_size)
- { this->data_size_ = data_size; }
+ {
+ gold_assert(!Output_data::sizes_are_fixed);
+ this->data_size_ = data_size;
+ }
// Return default alignment for a size--32 or 64.
static uint64_t
Output_data(const Output_data&);
Output_data& operator=(const Output_data&);
+ // This is used for verification, to make sure that we don't try to
+ // change any sizes after we set the section addresses.
+ static bool sizes_are_fixed;
+
// Memory address in file (not always meaningful).
uint64_t address_;
// Size of data in file.
public:
Output_section_headers(int size,
bool big_endian,
- const Layout::Segment_list&,
- const Layout::Section_list&,
+ const Layout*,
+ const Layout::Segment_list*,
+ const Layout::Section_list*,
const Stringpool*);
// Write the data to the file.
int size_;
bool big_endian_;
- const Layout::Segment_list& segment_list_;
- const Layout::Section_list& section_list_;
+ const Layout* layout_;
+ const Layout::Segment_list* segment_list_;
+ const Layout::Section_list* unattached_section_list_;
const Stringpool* secnamepool_;
};
// checking.
void
do_set_address(uint64_t, off_t off) const
- { assert(off == 0); }
+ { gold_assert(off == 0); }
private:
// Write the data to the file with the right size and endianness.
: Output_data(0), output_section_(NULL), addralign_(addralign)
{ }
+ // Return the output section.
+ const Output_section*
+ output_section() const
+ { return this->output_section_; }
+
// Record the output section.
void
- set_output_section(Output_section* os)
+ set_output_section(Output_section* os);
+
+ // Add an input section, for SHF_MERGE sections. This returns true
+ // if the section was handled.
+ bool
+ add_input_section(Relobj* object, unsigned int shndx)
+ { return this->do_add_input_section(object, shndx); }
+
+ // Given an input OBJECT, an input section index SHNDX within that
+ // object, and an OFFSET relative to the start of that input
+ // section, return whether or not the output address is known.
+ // OUTPUT_SECTION_ADDRESS is the address of the output section which
+ // this is a part of. If this function returns true, it sets
+ // *POUTPUT to the output address.
+ virtual bool
+ output_address(const Relobj* object, unsigned int shndx, off_t offset,
+ uint64_t output_section_address, uint64_t *poutput) const
{
- assert(this->output_section_ == NULL);
- this->output_section_ = os;
+ return this->do_output_address(object, shndx, offset,
+ output_section_address, poutput);
}
protected:
// The child class must implement do_write.
+ // The child class may implement specific adjustments to the output
+ // section.
+ virtual void
+ do_adjust_output_section(Output_section*)
+ { }
+
+ // May be implemented by child class. Return true if the section
+ // was handled.
+ virtual bool
+ do_add_input_section(Relobj*, unsigned int)
+ { gold_unreachable(); }
+
+ // The child class may implement output_address.
+ virtual bool
+ do_output_address(const Relobj*, unsigned int, off_t, uint64_t,
+ uint64_t*) const
+ { return false; }
+
// Return the required alignment.
uint64_t
do_addralign() const
unsigned int
do_out_shndx() const;
+ // Set the alignment.
+ void
+ set_addralign(uint64_t addralign)
+ { this->addralign_ = addralign; }
+
private:
// The output section for this section.
const Output_section* output_section_;
data_(reinterpret_cast<const char*>(p), len)
{ }
- // Write the data to the file.
+ // Add more data.
+ void
+ add_data(const std::string& add)
+ {
+ this->data_.append(add);
+ this->set_data_size(this->data_.size());
+ }
+
+ // Write the data to the output file.
void
- do_write(Output_file* output);
+ do_write(Output_file*);
private:
std::string data_;
};
-// Output_data_common is used to handle the common symbols. This is
-// quite simple.
+// Another version of Output_data with constant data, in which the
+// buffer is allocated by the caller.
+
+class Output_data_const_buffer : public Output_section_data
+{
+ public:
+ Output_data_const_buffer(const unsigned char* p, off_t len,
+ uint64_t addralign)
+ : Output_section_data(len, addralign), p_(p)
+ { }
+
+ // Write the data the output file.
+ void
+ do_write(Output_file*);
+
+ private:
+ const unsigned char* p_;
+};
+
+// A place holder for data written out via some other mechanism.
-class Output_data_common : public Output_section_data
+class Output_data_space : public Output_section_data
{
public:
- Output_data_common(uint64_t addralign)
+ Output_data_space(off_t data_size, uint64_t addralign)
+ : Output_section_data(data_size, addralign)
+ { }
+
+ explicit Output_data_space(uint64_t addralign)
: Output_section_data(addralign)
{ }
// Set the size.
void
- set_common_size(off_t common_size)
- { this->set_data_size(common_size); }
+ set_space_size(off_t space_size)
+ { this->set_data_size(space_size); }
+
+ // Set the alignment.
+ void
+ set_space_alignment(uint64_t align)
+ { this->set_addralign(align); }
- // Write out the data--there is nothing to do, as common symbols are
- // always zero and are stored in the BSS.
+ // Write out the data--this must be handled elsewhere.
void
do_write(Output_file*)
{ }
};
+// A string table which goes into an output section.
+
+class Output_data_strtab : public Output_section_data
+{
+ public:
+ Output_data_strtab(Stringpool* strtab)
+ : Output_section_data(1), strtab_(strtab)
+ { }
+
+ // This is called to set the address and file offset. Here we make
+ // sure that the Stringpool is finalized.
+ void
+ do_set_address(uint64_t, off_t);
+
+ // Write out the data.
+ void
+ do_write(Output_file*);
+
+ private:
+ Stringpool* strtab_;
+};
+
// This POD class is used to represent a single reloc in the output
// file. This could be a private class within Output_data_reloc, but
// the templatization is complex enough that I broke it out into a
{ }
// A reloc against a global symbol.
- Output_reloc(Symbol* gsym, unsigned int type, Address address)
- : local_sym_index_(GSYM_CODE), type_(type), address_(address)
- { this->u_.gsym = gsym; }
+
+ Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address)
+ : address_(address), local_sym_index_(GSYM_CODE), type_(type),
+ shndx_(INVALID_CODE)
+ {
+ this->u1_.gsym = gsym;
+ this->u2_.od = od;
+ }
+
+ Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address)
+ : address_(address), local_sym_index_(GSYM_CODE), type_(type),
+ shndx_(shndx)
+ {
+ gold_assert(shndx != INVALID_CODE);
+ this->u1_.gsym = gsym;
+ this->u2_.relobj = relobj;
+ }
// A reloc against a local symbol.
- Output_reloc(Sized_relobj<size, big_endian>* object,
+
+ Output_reloc(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index,
- unsigned int type, Address address)
- : local_sym_index_(local_sym_index), type_(type), address_(address)
+ unsigned int type,
+ Output_data* od,
+ Address address)
+ : address_(address), local_sym_index_(local_sym_index), type_(type),
+ shndx_(INVALID_CODE)
{
- assert(local_sym_index != GSYM_CODE && local_sym_index != INVALID_CODE);
- this->u_.object = object;
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != INVALID_CODE);
+ this->u1_.relobj = relobj;
+ this->u2_.od = od;
+ }
+
+ Output_reloc(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index,
+ unsigned int type,
+ unsigned int shndx,
+ Address address)
+ : address_(address), local_sym_index_(local_sym_index), type_(type),
+ shndx_(shndx)
+ {
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != INVALID_CODE);
+ gold_assert(shndx != INVALID_CODE);
+ this->u1_.relobj = relobj;
+ this->u2_.relobj = relobj;
}
// A reloc against the STT_SECTION symbol of an output section.
- Output_reloc(Output_section* os, unsigned int type, Address address)
- : local_sym_index_(SECTION_CODE), type_(type), address_(address)
- { this->u_.os = os; }
+
+ Output_reloc(Output_section* os, unsigned int type, Output_data* od,
+ Address address)
+ : address_(address), local_sym_index_(SECTION_CODE), type_(type),
+ shndx_(INVALID_CODE)
+ {
+ this->u1_.os = os;
+ this->u2_.od = od;
+ }
+
+ Output_reloc(Output_section* os, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address)
+ : address_(address), local_sym_index_(SECTION_CODE), type_(type),
+ shndx_(shndx)
+ {
+ gold_assert(shndx != INVALID_CODE);
+ this->u1_.os = os;
+ this->u2_.relobj = relobj;
+ }
// Write the reloc entry to an output view.
void
// relocation against a local symbol in a dynamic object; that
// doesn't make sense. And our callers will always be
// templatized, so we use Sized_relobj here.
- Sized_relobj<size, big_endian>* object;
+ Sized_relobj<size, big_endian>* relobj;
// For a global symbol, the symbol. If this is NULL, it indicates
// a relocation against the undefined 0 symbol.
Symbol* gsym;
// For a relocation against an output section, the output section.
Output_section* os;
- } u_;
+ } u1_;
+ union
+ {
+ // If shndx_ is not INVALID CODE, the object which holds the input
+ // section being used to specify the reloc address.
+ Relobj* relobj;
+ // If shndx_ is INVALID_CODE, the output data being used to
+ // specify the reloc address. This may be NULL if the reloc
+ // address is absolute.
+ Output_data* od;
+ } u2_;
+ // The address offset within the input section or the Output_data.
+ Address address_;
// For a local symbol, the local symbol index. This is GSYM_CODE
// for a global symbol, or INVALID_CODE for an uninitialized value.
unsigned int local_sym_index_;
+ // The reloc type--a processor specific code.
unsigned int type_;
- Address address_;
+ // If the reloc address is an input section in an object, the
+ // section index. This is INVALID_CODE if the reloc address is
+ // specified in some other way.
+ unsigned int shndx_;
};
// The SHT_RELA version of Output_reloc<>. This is just derived from
{ }
// A reloc against a global symbol.
- Output_reloc(Symbol* gsym, unsigned int type, Address address, Addend addend)
- : rel_(gsym, type, address), addend_(addend)
+
+ Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ : rel_(gsym, type, od, address), addend_(addend)
+ { }
+
+ Output_reloc(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ : rel_(gsym, type, relobj, shndx, address), addend_(addend)
{ }
// A reloc against a local symbol.
- Output_reloc(Sized_relobj<size, big_endian>* object,
+
+ Output_reloc(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index,
- unsigned int type, Address address, Addend addend)
- : rel_(object, local_sym_index, type, address), addend_(addend)
+ unsigned int type, Output_data* od, Address address,
+ Addend addend)
+ : rel_(relobj, local_sym_index, type, od, address), addend_(addend)
{ }
- // A reloc against the STT_SECTION symbol of an output section.
- Output_reloc(Output_section* os, unsigned int type, Address address,
+ Output_reloc(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index,
+ unsigned int type,
+ unsigned int shndx,
+ Address address,
Addend addend)
- : rel_(os, type, address), addend_(addend)
+ : rel_(relobj, local_sym_index, type, shndx, address),
+ addend_(addend)
+ { }
+
+ // A reloc against the STT_SECTION symbol of an output section.
+
+ Output_reloc(Output_section* os, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ : rel_(os, type, od, address), addend_(addend)
+ { }
+
+ Output_reloc(Output_section* os, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ : rel_(os, type, relobj, shndx, address), addend_(addend)
{ }
// Write the reloc entry to an output view.
do_write(Output_file*);
protected:
+ // Set the entry size and the link.
+ void
+ do_adjust_output_section(Output_section *os);
+
// Add a relocation entry.
void
add(const Output_reloc_type& reloc)
{ }
// Add a reloc against a global symbol.
+
+ void
+ add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address)
+ { this->add(Output_reloc_type(gsym, type, od, address)); }
+
void
- add_global(Symbol* gsym, unsigned int type, Address address)
- { this->add(Output_reloc_type(gsym, type, address)); }
+ add_global(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address)
+ { this->add(Output_reloc_type(gsym, type, relobj, shndx, address)); }
// Add a reloc against a local symbol.
+
void
- add_local(Sized_relobj<size, big_endian>* object,
- unsigned int local_sym_index, unsigned int type, Address address)
- { this->add(Output_reloc_type(object, local_sym_index, type, address)); }
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address)
+ { this->add(Output_reloc_type(relobj, local_sym_index, type, od, address)); }
+
+ void
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ unsigned int shndx, Address address)
+ { this->add(Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address)); }
+
// A reloc against the STT_SECTION symbol of an output section.
+
+ void
+ add_output_section(Output_section* os, unsigned int type,
+ Output_data* od, Address address)
+ { this->add(Output_reloc_type(os, type, od, address)); }
+
void
- add_output_section(Output_section* os, unsigned int type, Address address)
- { this->add(Output_reloc_type(os, type, address)); }
+ add_output_section(Output_section* os, unsigned int type,
+ Relobj* relobj, unsigned int shndx, Address address)
+ { this->add(Output_reloc_type(os, type, relobj, shndx, address)); }
};
// The SHT_RELA version of Output_data_reloc.
{ }
// Add a reloc against a global symbol.
+
+ void
+ add_global(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ { this->add(Output_reloc_type(gsym, type, od, address, addend)); }
+
void
- add_global(Symbol* gsym, unsigned int type, Address address, Addend addend)
- { this->add(Output_reloc_type(gsym, type, address, addend)); }
+ add_global(Symbol* gsym, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ { this->add(Output_reloc_type(gsym, type, relobj, shndx, address, addend)); }
// Add a reloc against a local symbol.
+
+ void
+ add_local(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address, Addend addend)
+ {
+ this->add(Output_reloc_type(relobj, local_sym_index, type, od, address,
+ addend));
+ }
+
void
- add_local(Sized_relobj<size, big_endian>* object,
+ add_local(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index, unsigned int type,
- Address address, Addend addend)
+ unsigned int shndx, Address address, Addend addend)
{
- this->add(Output_reloc_type(object, local_sym_index, type, address,
+ this->add(Output_reloc_type(relobj, local_sym_index, type, shndx, address,
addend));
}
// A reloc against the STT_SECTION symbol of an output section.
+
void
- add_output_section(Output_section* os, unsigned int type, Address address,
- Addend addend)
- { this->add(Output_reloc_type(os, type, address, addend)); }
+ add_output_section(Output_section* os, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ { this->add(Output_reloc_type(os, type, od, address, addend)); }
+
+ void
+ add_output_section(Output_section* os, unsigned int type, Relobj* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ { this->add(Output_reloc_type(os, type, relobj, shndx, address, addend)); }
};
// Output_data_got is used to manage a GOT. Each entry in the GOT is
public:
typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
- Output_data_got()
+ Output_data_got(const General_options* options)
: Output_section_data(Output_data::default_alignment(size)),
- entries_()
+ options_(options), entries_()
{ }
// Add an entry for a global symbol to the GOT. Return true if this
{ this->u_.constant = 0; }
// Create a global symbol entry.
- Got_entry(Symbol* gsym)
+ explicit Got_entry(Symbol* gsym)
: local_sym_index_(GSYM_CODE)
{ this->u_.gsym = gsym; }
Got_entry(Object* object, unsigned int local_sym_index)
: local_sym_index_(local_sym_index)
{
- assert(local_sym_index != GSYM_CODE
- && local_sym_index != CONSTANT_CODE);
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != CONSTANT_CODE);
this->u_.object = object;
}
// Create a constant entry. The constant is a host value--it will
// be swapped, if necessary, when it is written out.
- Got_entry(Valtype constant)
+ explicit Got_entry(Valtype constant)
: local_sym_index_(CONSTANT_CODE)
{ this->u_.constant = constant; }
// Write the GOT entry to an output view.
void
- write(unsigned char* pov) const;
+ write(const General_options*, unsigned char* pov) const;
private:
enum
set_got_size()
{ this->set_data_size(this->got_offset(this->entries_.size())); }
+ // Options.
+ const General_options* options_;
// The list of GOT entries.
Got_entries entries_;
};
+// Output_data_dynamic is used to hold the data in SHT_DYNAMIC
+// section.
+
+class Output_data_dynamic : public Output_section_data
+{
+ public:
+ Output_data_dynamic(const Target* target, Stringpool* pool)
+ : Output_section_data(Output_data::default_alignment(target->get_size())),
+ target_(target), entries_(), pool_(pool)
+ { }
+
+ // Add a new dynamic entry with a fixed numeric value.
+ void
+ add_constant(elfcpp::DT tag, unsigned int val)
+ { this->add_entry(Dynamic_entry(tag, val)); }
+
+ // Add a new dynamic entry with the address of output data.
+ void
+ add_section_address(elfcpp::DT tag, const Output_data* od)
+ { this->add_entry(Dynamic_entry(tag, od, false)); }
+
+ // Add a new dynamic entry with the size of output data.
+ void
+ add_section_size(elfcpp::DT tag, const Output_data* od)
+ { this->add_entry(Dynamic_entry(tag, od, true)); }
+
+ // Add a new dynamic entry with the address of a symbol.
+ void
+ add_symbol(elfcpp::DT tag, const Symbol* sym)
+ { this->add_entry(Dynamic_entry(tag, sym)); }
+
+ // Add a new dynamic entry with a string.
+ void
+ add_string(elfcpp::DT tag, const char* str)
+ { this->add_entry(Dynamic_entry(tag, this->pool_->add(str, NULL))); }
+
+ // Set the final data size.
+ void
+ do_set_address(uint64_t, off_t);
+
+ // Write out the dynamic entries.
+ void
+ do_write(Output_file*);
+
+ protected:
+ // Adjust the output section to set the entry size.
+ void
+ do_adjust_output_section(Output_section*);
+
+ private:
+ // This POD class holds a single dynamic entry.
+ class Dynamic_entry
+ {
+ public:
+ // Create an entry with a fixed numeric value.
+ Dynamic_entry(elfcpp::DT tag, unsigned int val)
+ : tag_(tag), classification_(DYNAMIC_NUMBER)
+ { this->u_.val = val; }
+
+ // Create an entry with the size or address of a section.
+ Dynamic_entry(elfcpp::DT tag, const Output_data* od, bool section_size)
+ : tag_(tag),
+ classification_(section_size
+ ? DYNAMIC_SECTION_SIZE
+ : DYNAMIC_SECTION_ADDRESS)
+ { this->u_.od = od; }
+
+ // Create an entry with the address of a symbol.
+ Dynamic_entry(elfcpp::DT tag, const Symbol* sym)
+ : tag_(tag), classification_(DYNAMIC_SYMBOL)
+ { this->u_.sym = sym; }
+
+ // Create an entry with a string.
+ Dynamic_entry(elfcpp::DT tag, const char* str)
+ : tag_(tag), classification_(DYNAMIC_STRING)
+ { this->u_.str = str; }
+
+ // Write the dynamic entry to an output view.
+ template<int size, bool big_endian>
+ void
+ write(unsigned char* pov, const Stringpool* ACCEPT_SIZE_ENDIAN) const;
+
+ private:
+ enum Classification
+ {
+ // Number.
+ DYNAMIC_NUMBER,
+ // Section address.
+ DYNAMIC_SECTION_ADDRESS,
+ // Section size.
+ DYNAMIC_SECTION_SIZE,
+ // Symbol adress.
+ DYNAMIC_SYMBOL,
+ // String.
+ DYNAMIC_STRING
+ };
+
+ union
+ {
+ // For DYNAMIC_NUMBER.
+ unsigned int val;
+ // For DYNAMIC_SECTION_ADDRESS and DYNAMIC_SECTION_SIZE.
+ const Output_data* od;
+ // For DYNAMIC_SYMBOL.
+ const Symbol* sym;
+ // For DYNAMIC_STRING.
+ const char* str;
+ } u_;
+ // The dynamic tag.
+ elfcpp::DT tag_;
+ // The type of entry.
+ Classification classification_;
+ };
+
+ // Add an entry to the list.
+ void
+ add_entry(const Dynamic_entry& entry)
+ { this->entries_.push_back(entry); }
+
+ // Sized version of write function.
+ template<int size, bool big_endian>
+ void
+ sized_write(Output_file* of);
+
+ // The type of the list of entries.
+ typedef std::vector<Dynamic_entry> Dynamic_entries;
+
+ // The target.
+ const Target* target_;
+ // The entries.
+ Dynamic_entries entries_;
+ // The pool used for strings.
+ Stringpool* pool_;
+};
+
// An output section. We don't expect to have too many output
// sections, so we don't bother to do a template on the size.
{
public:
// Create an output section, giving the name, type, and flags.
- Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword,
- bool may_add_data);
+ Output_section(const char* name, elfcpp::Elf_Word, elfcpp::Elf_Xword);
virtual ~Output_section();
// Add a new input section SHNDX, named NAME, with header SHDR, from
add_input_section(Relobj* object, unsigned int shndx, const char *name,
const elfcpp::Shdr<size, big_endian>& shdr);
- // Add generated data ODATA to this output section.
+ // Add generated data POSD to this output section.
void
add_output_section_data(Output_section_data* posd);
do_set_out_shndx(unsigned int shndx)
{ this->out_shndx_ = shndx; }
+ // Return the entsize field.
+ uint64_t
+ entsize() const
+ { return this->entsize_; }
+
// Set the entsize field.
void
- set_entsize(uint64_t v)
- { this->entsize_ = v; }
+ set_entsize(uint64_t v);
- // Set the link field.
+ // Set the link field to the output section index of a section.
+ void
+ set_link_section(const Output_data* od)
+ {
+ gold_assert(this->link_ == 0
+ && !this->should_link_to_symtab_
+ && !this->should_link_to_dynsym_);
+ this->link_section_ = od;
+ }
+
+ // Set the link field to a constant.
void
set_link(unsigned int v)
- { this->link_ = v; }
+ {
+ gold_assert(this->link_section_ == NULL
+ && !this->should_link_to_symtab_
+ && !this->should_link_to_dynsym_);
+ this->link_ = v;
+ }
- // Set the info field.
+ // Record that this section should link to the normal symbol table.
+ void
+ set_should_link_to_symtab()
+ {
+ gold_assert(this->link_section_ == NULL
+ && this->link_ == 0
+ && !this->should_link_to_dynsym_);
+ this->should_link_to_symtab_ = true;
+ }
+
+ // Record that this section should link to the dynamic symbol table.
+ void
+ set_should_link_to_dynsym()
+ {
+ gold_assert(this->link_section_ == NULL
+ && this->link_ == 0
+ && !this->should_link_to_symtab_);
+ this->should_link_to_dynsym_ = true;
+ }
+
+ // Return the info field.
+ unsigned int
+ info() const
+ {
+ gold_assert(this->info_section_ == NULL);
+ return this->info_;
+ }
+
+ // Set the info field to the output section index of a section.
+ void
+ set_info_section(const Output_data* od)
+ {
+ gold_assert(this->info_ == 0);
+ this->info_section_ = od;
+ }
+
+ // Set the info field to a constant.
void
set_info(unsigned int v)
- { this->info_ = v; }
+ {
+ gold_assert(this->info_section_ == NULL);
+ this->info_ = v;
+ }
// Set the addralign field.
void
unsigned int
symtab_index() const
{
- assert(this->symtab_index_ != 0);
+ gold_assert(this->symtab_index_ != 0);
return this->symtab_index_;
}
void
set_symtab_index(unsigned int index)
{
- assert(index != 0);
+ gold_assert(index != 0);
this->symtab_index_ = index;
}
unsigned int
dynsym_index() const
{
- assert(this->dynsym_index_ != 0);
+ gold_assert(this->dynsym_index_ != 0);
return this->dynsym_index_;
}
void
set_dynsym_index(unsigned int index)
{
- assert(index != 0);
+ gold_assert(index != 0);
this->dynsym_index_ = index;
}
+ // Return the output virtual address of OFFSET relative to the start
+ // of input section SHNDX in object OBJECT.
+ uint64_t
+ output_address(const Relobj* object, unsigned int shndx,
+ off_t offset) const;
+
// Set the address of the Output_section. For a typical
// Output_section, there is nothing to do, but if there are any
// Output_section_data objects we need to set the final addresses
// does nothing: the data is written out by calling Object::Relocate
// on each input object. But if there are any Output_section_data
// objects we do need to write them out here.
- virtual void
+ void
do_write(Output_file*);
// Return the address alignment--function required by parent class.
// Write the section header into *OPHDR.
template<int size, bool big_endian>
void
- write_header(const Stringpool*, elfcpp::Shdr_write<size, big_endian>*) const;
+ write_header(const Layout*, const Stringpool*,
+ elfcpp::Shdr_write<size, big_endian>*) const;
private:
// In some cases we need to keep a list of the input sections
{
public:
Input_section()
- : shndx_(0), p2align_(0), data_size_(0)
- { this->u_.object = NULL; }
+ : shndx_(0), p2align_(0)
+ {
+ this->u1_.data_size = 0;
+ this->u2_.object = NULL;
+ }
+ // For an ordinary input section.
Input_section(Relobj* object, unsigned int shndx, off_t data_size,
uint64_t addralign)
: shndx_(shndx),
- p2align_(ffsll(static_cast<long long>(addralign))),
- data_size_(data_size)
+ p2align_(ffsll(static_cast<long long>(addralign)))
{
- assert(shndx != -1U);
- this->u_.object = object;
+ gold_assert(shndx != OUTPUT_SECTION_CODE
+ && shndx != MERGE_DATA_SECTION_CODE
+ && shndx != MERGE_STRING_SECTION_CODE);
+ this->u1_.data_size = data_size;
+ this->u2_.object = object;
}
+ // For a non-merge output section.
Input_section(Output_section_data* posd)
- : shndx_(-1U),
- p2align_(ffsll(static_cast<long long>(posd->addralign()))),
- data_size_(0)
- { this->u_.posd = posd; }
+ : shndx_(OUTPUT_SECTION_CODE),
+ p2align_(ffsll(static_cast<long long>(posd->addralign())))
+ {
+ this->u1_.data_size = 0;
+ this->u2_.posd = posd;
+ }
+
+ // For a merge section.
+ Input_section(Output_section_data* posd, bool is_string, uint64_t entsize)
+ : shndx_(is_string
+ ? MERGE_STRING_SECTION_CODE
+ : MERGE_DATA_SECTION_CODE),
+ p2align_(ffsll(static_cast<long long>(posd->addralign())))
+ {
+ this->u1_.entsize = entsize;
+ this->u2_.posd = posd;
+ }
// The required alignment.
uint64_t
addralign() const
- { return static_cast<uint64_t>(1) << this->p2align_; }
+ {
+ return (this->p2align_ == 0
+ ? 0
+ : static_cast<uint64_t>(1) << (this->p2align_ - 1));
+ }
// Return the required size.
off_t
data_size() const;
+ // Return whether this is a merge section which matches the
+ // parameters.
+ bool
+ is_merge_section(bool is_string, uint64_t entsize) const
+ {
+ return (this->shndx_ == (is_string
+ ? MERGE_STRING_SECTION_CODE
+ : MERGE_DATA_SECTION_CODE)
+ && this->u1_.entsize == entsize);
+ }
+
+ // Set the output section.
+ void
+ set_output_section(Output_section* os)
+ {
+ gold_assert(!this->is_input_section());
+ this->u2_.posd->set_output_section(os);
+ }
+
// Set the address and file offset. This is called during
// Layout::finalize. SECOFF is the file offset of the enclosing
// section.
void
set_address(uint64_t addr, off_t off, off_t secoff);
+ // Add an input section, for SHF_MERGE sections.
+ bool
+ add_input_section(Relobj* object, unsigned int shndx)
+ {
+ gold_assert(this->shndx_ == MERGE_DATA_SECTION_CODE
+ || this->shndx_ == MERGE_STRING_SECTION_CODE);
+ return this->u2_.posd->add_input_section(object, shndx);
+ }
+
+ // Given an input OBJECT, an input section index SHNDX within that
+ // object, and an OFFSET relative to the start of that input
+ // section, return whether or not the output address is known.
+ // OUTPUT_SECTION_ADDRESS is the address of the output section
+ // which this is a part of. If this function returns true, it
+ // sets *POUTPUT to the output address.
+ bool
+ output_address(const Relobj* object, unsigned int shndx, off_t offset,
+ uint64_t output_section_address, uint64_t *poutput) const;
+
// Write out the data. This does nothing for an input section.
void
write(Output_file*);
private:
+ // Code values which appear in shndx_. If the value is not one of
+ // these codes, it is the input section index in the object file.
+ enum
+ {
+ // An Output_section_data.
+ OUTPUT_SECTION_CODE = -1U,
+ // An Output_section_data for an SHF_MERGE section with
+ // SHF_STRINGS not set.
+ MERGE_DATA_SECTION_CODE = -2U,
+ // An Output_section_data for an SHF_MERGE section with
+ // SHF_STRINGS set.
+ MERGE_STRING_SECTION_CODE = -3U
+ };
+
// Whether this is an input section.
bool
is_input_section() const
- { return this->shndx_ != -1U; }
+ {
+ return (this->shndx_ != OUTPUT_SECTION_CODE
+ && this->shndx_ != MERGE_DATA_SECTION_CODE
+ && this->shndx_ != MERGE_STRING_SECTION_CODE);
+ }
- // For an ordinary input section, this is the section index in
- // the input file. For an Output_section_data, this is -1U.
+ // For an ordinary input section, this is the section index in the
+ // input file. For an Output_section_data, this is
+ // OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
+ // MERGE_STRING_SECTION_CODE.
unsigned int shndx_;
// The required alignment, stored as a power of 2.
unsigned int p2align_;
- // For an ordinary input section, the section size.
- off_t data_size_;
union
{
- // If shndx_ != -1U, this points to the object which holds the
+ // For an ordinary input section, the section size.
+ off_t data_size;
+ // For OUTPUT_SECTION_CODE, this is not used. For
+ // MERGE_DATA_SECTION_CODE or MERGE_STRING_SECTION_CODE, the
+ // entity size.
+ uint64_t entsize;
+ } u1_;
+ union
+ {
+ // For an ordinary input section, the object which holds the
// input section.
Relobj* object;
- // If shndx_ == -1U, this is the data to write out.
+ // For OUTPUT_SECTION_CODE or MERGE_DATA_SECTION_CODE or
+ // MERGE_STRING_SECTION_CODE, the data.
Output_section_data* posd;
- } u_;
+ } u2_;
};
typedef std::vector<Input_section> Input_section_list;
+ // Add a new output section by Input_section.
+ void
+ add_output_section_data(Input_section*);
+
+ // Add an SHF_MERGE input section. Returns true if the section was
+ // handled.
+ bool
+ add_merge_input_section(Relobj* object, unsigned int shndx, uint64_t flags,
+ uint64_t entsize, uint64_t addralign);
+
+ // Add an output SHF_MERGE section POSD to this output section.
+ // IS_STRING indicates whether it is a SHF_STRINGS section, and
+ // ENTSIZE is the entity size. This returns the entry added to
+ // input_sections_.
+ void
+ add_output_merge_section(Output_section_data* posd, bool is_string,
+ uint64_t entsize);
+
// Most of these fields are only valid after layout.
// The name of the section. This will point into a Stringpool.
// The section entry size.
uint64_t entsize_;
// The file offset is in the parent class.
- // The section link field.
+ // Set the section link field to the index of this section.
+ const Output_data* link_section_;
+ // If link_section_ is NULL, this is the link field.
unsigned int link_;
- // The section info field.
+ // Set the section info field to the index of this section.
+ const Output_data* info_section_;
+ // If info_section_ is NULL, this is the section info field.
unsigned int info_;
// The section type.
elfcpp::Elf_Word type_;
Input_section_list input_sections_;
// The offset of the first entry in input_sections_.
off_t first_input_offset_;
- // Whether we permit adding data.
- bool may_add_data_ : 1;
// Whether this output section needs a STT_SECTION symbol in the
// normal symbol table. This will be true if there is a relocation
// which needs it.
// dynamic symbol table. This will be true if there is a dynamic
// relocation which needs it.
bool needs_dynsym_index_ : 1;
-};
-
-// A special Output_section which represents the symbol table
-// (SHT_SYMTAB). The actual data is written out by
-// Symbol_table::write_globals.
-
-class Output_section_symtab : public Output_section
-{
- public:
- Output_section_symtab(const char* name, off_t data_size)
- : Output_section(name, elfcpp::SHT_SYMTAB, 0, false)
- { this->set_data_size(data_size); }
-
- // The data is written out by Symbol_table::write_globals. We don't
- // do anything here.
- void
- do_write(Output_file*)
- { }
-};
-
-// A special Output_section which represents the dynamic symbol table
-// (SHT_DYNSYM). The actual data is written out by
-// Symbol_table::write_globals.
-
-class Output_section_dynsym : public Output_section
-{
- public:
- Output_section_dynsym(const char* name, off_t data_size)
- : Output_section(name, elfcpp::SHT_DYNSYM, 0, false)
- { this->set_data_size(data_size); }
-
- // The data is written out by Symbol_table::write_globals. We don't
- // do anything here.
- void
- do_write(Output_file*)
- { }
-};
-
-// A special Output_section which holds a string table.
-
-class Output_section_strtab : public Output_section
-{
- public:
- Output_section_strtab(const char* name, Stringpool* contents);
-
- // Write out the data.
- void
- do_write(Output_file*);
-
- private:
- Stringpool* contents_;
+ // Whether the link field of this output section should point to the
+ // normal symbol table.
+ bool should_link_to_symtab_ : 1;
+ // Whether the link field of this output section should point to the
+ // dynamic symbol table.
+ bool should_link_to_dynsym_ : 1;
};
// An output segment. PT_LOAD segments are built from collections of
// Write the section headers of associated sections into V.
template<int size, bool big_endian>
unsigned char*
- write_section_headers(const Stringpool*,
- unsigned char* v,
+ write_section_headers(const Layout*, const Stringpool*, unsigned char* v,
unsigned int* pshndx ACCEPT_SIZE_ENDIAN) const;
private:
// Write the section headers in the list into V.
template<int size, bool big_endian>
unsigned char*
- write_section_headers_list(const Stringpool*, const Output_data_list*,
- unsigned char* v,
+ write_section_headers_list(const Layout*, const Stringpool*,
+ const Output_data_list*, unsigned char* v,
unsigned int* pshdx ACCEPT_SIZE_ENDIAN) const;
// The list of output data with contents attached to this segment.
unsigned char*
get_output_view(off_t start, off_t size)
{
- assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
+ gold_assert(start >= 0 && size >= 0 && start + size <= this->file_size_);
return this->base_ + start;
}
projects / deliverable / binutils-gdb.git / blobdiff