#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.
int size_;
bool big_endian_;
const Layout::Segment_list& segment_list_;
- const Layout::Section_list& section_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.
void
set_output_section(Output_section* os)
{
- assert(this->output_section_ == NULL);
+ gold_assert(this->output_section_ == NULL);
this->output_section_ = os;
}
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_common : public Output_section_data
+class Output_data_const_buffer : public Output_section_data
{
public:
- Output_data_common(uint64_t addralign)
+ 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_space : public Output_section_data
+{
+ public:
+ 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); }
- // 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)
+ Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
+ Address address)
+ : local_sym_index_(GSYM_CODE), type_(type), od_(od), address_(address)
{ this->u_.gsym = gsym; }
// A reloc against a local symbol.
Output_reloc(Sized_relobj<size, big_endian>* object,
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)
+ : local_sym_index_(local_sym_index), type_(type), od_(od),
+ address_(address)
{
- assert(local_sym_index != GSYM_CODE && local_sym_index != INVALID_CODE);
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != INVALID_CODE);
this->u_.object = object;
}
// 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)
+ Output_reloc(Output_section* os, unsigned int type, Output_data* od,
+ Address address)
+ : local_sym_index_(SECTION_CODE), type_(type), od_(od), address_(address)
{ this->u_.os = os; }
// Write the reloc entry to an output view.
// 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_;
+ // If this is not NULL, then the relocation is against the contents
+ // of this output data.
+ Output_data* od_;
+ // The reloc address--if od_ is not NULL, this is the offset from
+ // the start of od_.
Address address_;
};
{ }
// 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)
{ }
// A reloc against a local symbol.
Output_reloc(Sized_relobj<size, big_endian>* object,
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_(object, 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,
- Addend addend)
- : rel_(os, type, address), addend_(addend)
+ Output_reloc(Output_section* os, unsigned int type, Output_data* od,
+ Address address, Addend addend)
+ : rel_(os, type, od, address), addend_(addend)
{ }
// Write the reloc entry to an output view.
// Add a reloc against a global symbol.
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, Output_data* od, Address address)
+ { this->add(Output_reloc_type(gsym, type, od, 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)); }
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address)
+ { this->add(Output_reloc_type(object, local_sym_index, type, od, address)); }
// A reloc against the STT_SECTION symbol of an output section.
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,
+ Output_data* od, Address address)
+ { this->add(Output_reloc_type(os, type, od, address)); }
};
// The SHT_RELA version of Output_data_reloc.
// Add a reloc against a global symbol.
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, Output_data* od,
+ Address address, Addend addend)
+ { this->add(Output_reloc_type(gsym, type, od, address, addend)); }
// 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, Addend addend)
+ Output_data* od, Address address, Addend addend)
{
- this->add(Output_reloc_type(object, local_sym_index, type, address,
+ this->add(Output_reloc_type(object, local_sym_index, type, od, 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)); }
};
// 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 a section.
+ void
+ add_section_address(elfcpp::DT tag, Output_section* os)
+ { this->add_entry(Dynamic_entry(tag, os, false)); }
+
+ // Add a new dynamic entry with the size of a section.
+ void
+ add_section_size(elfcpp::DT tag, Output_section* os)
+ { this->add_entry(Dynamic_entry(tag, os, true)); }
+
+ // Add a new dynamic entry with the address of a symbol.
+ void
+ add_symbol(elfcpp::DT tag, 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*);
+
+ 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, Output_section* os, bool section_size)
+ : tag_(tag),
+ classification_(section_size
+ ? DYNAMIC_SECTION_SIZE
+ : DYNAMIC_SECTION_ADDRESS)
+ { this->u_.os = os; }
+
+ // Create an entry with the address of a symbol.
+ Dynamic_entry(elfcpp::DT tag, 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*) 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.
+ Output_section* os;
+ // For DYNAMIC_SYMBOL.
+ 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.
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)
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;
}
// 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.
p2align_(ffsll(static_cast<long long>(addralign))),
data_size_(data_size)
{
- assert(shndx != -1U);
+ gold_assert(shndx != -1U);
this->u_.object = object;
}
// 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
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_;
-};
-
// An output segment. PT_LOAD segments are built from collections of
// output sections. Other segments typically point within PT_LOAD
// segments, and are built directly as needed.
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;
}
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