// output.h -- manage the output file for gold -*- C++ -*-
-// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#ifndef GOLD_OUTPUT_H
#define GOLD_OUTPUT_H
+#include <algorithm>
#include <list>
#include <vector>
class General_options;
class Object;
class Symbol;
-class Output_file;
class Output_merge_base;
class Output_section;
class Relocatable_relocs;
class Sized_target;
template<int size, bool big_endian>
class Sized_relobj;
+template<int size, bool big_endian>
+class Sized_relobj_file;
+
+// This class represents the output file.
+
+class Output_file
+{
+ public:
+ Output_file(const char* name);
+
+ // Indicate that this is a temporary file which should not be
+ // output.
+ void
+ set_is_temporary()
+ { this->is_temporary_ = true; }
+
+ // Try to open an existing file. Returns false if the file doesn't
+ // exist, has a size of 0 or can't be mmaped. This method is
+ // thread-unsafe. If BASE_NAME is not NULL, use the contents of
+ // that file as the base for incremental linking.
+ bool
+ open_base_file(const char* base_name, bool writable);
+
+ // Open the output file. FILE_SIZE is the final size of the file.
+ // If the file already exists, it is deleted/truncated. This method
+ // is thread-unsafe.
+ void
+ open(off_t file_size);
+
+ // Resize the output file. This method is thread-unsafe.
+ void
+ resize(off_t file_size);
+
+ // Close the output file (flushing all buffered data) and make sure
+ // there are no errors. This method is thread-unsafe.
+ void
+ close();
+
+ // Return the size of this file.
+ off_t
+ filesize()
+ { return this->file_size_; }
+
+ // Return the name of this file.
+ const char*
+ filename()
+ { return this->name_; }
+
+ // We currently always use mmap which makes the view handling quite
+ // simple. In the future we may support other approaches.
+
+ // Write data to the output file.
+ void
+ write(off_t offset, const void* data, size_t len)
+ { memcpy(this->base_ + offset, data, len); }
+
+ // Get a buffer to use to write to the file, given the offset into
+ // the file and the size.
+ unsigned char*
+ get_output_view(off_t start, size_t size)
+ {
+ gold_assert(start >= 0
+ && start + static_cast<off_t>(size) <= this->file_size_);
+ return this->base_ + start;
+ }
+
+ // VIEW must have been returned by get_output_view. Write the
+ // buffer to the file, passing in the offset and the size.
+ void
+ write_output_view(off_t, size_t, unsigned char*)
+ { }
+
+ // Get a read/write buffer. This is used when we want to write part
+ // of the file, read it in, and write it again.
+ unsigned char*
+ get_input_output_view(off_t start, size_t size)
+ { return this->get_output_view(start, size); }
+
+ // Write a read/write buffer back to the file.
+ void
+ write_input_output_view(off_t, size_t, unsigned char*)
+ { }
+
+ // Get a read buffer. This is used when we just want to read part
+ // of the file back it in.
+ const unsigned char*
+ get_input_view(off_t start, size_t size)
+ { return this->get_output_view(start, size); }
+
+ // Release a read bfufer.
+ void
+ free_input_view(off_t, size_t, const unsigned char*)
+ { }
+
+ private:
+ // Map the file into memory or, if that fails, allocate anonymous
+ // memory.
+ void
+ map();
+
+ // Allocate anonymous memory for the file.
+ bool
+ map_anonymous();
+
+ // Map the file into memory.
+ bool
+ map_no_anonymous(bool);
+
+ // Unmap the file from memory (and flush to disk buffers).
+ void
+ unmap();
+
+ // File name.
+ const char* name_;
+ // File descriptor.
+ int o_;
+ // File size.
+ off_t file_size_;
+ // Base of file mapped into memory.
+ unsigned char* base_;
+ // True iff base_ points to a memory buffer rather than an output file.
+ bool map_is_anonymous_;
+ // True if base_ was allocated using new rather than mmap.
+ bool map_is_allocated_;
+ // True if this is a temporary file which should not be output.
+ bool is_temporary_;
+};
// An abtract class for data which has to go into the output file.
return this->data_size_;
}
+ // Get the current data size.
+ off_t
+ current_data_size() const
+ { return this->current_data_size_for_child(); }
+
// Return true if data size is fixed.
bool
is_data_size_fixed() const
{ return this->is_data_size_fixed_; }
-
+
// Return the file offset. This is only valid after
// Layout::finalize is finished. For some non-allocated sections,
// it may not be valid until near the end of the link.
return this->offset_;
}
- // Reset the address and file offset. This essentially disables the
- // sanity testing about duplicate and unknown settings.
+ // Reset the address, file offset and data size. This essentially
+ // disables the sanity testing about duplicate and unknown settings.
void
reset_address_and_file_offset()
{
this->do_reset_address_and_file_offset();
}
+ // As above, but just for data size.
+ void
+ reset_data_size()
+ {
+ if (!this->is_data_size_fixed_)
+ this->is_data_size_valid_ = false;
+ }
+
// Return true if address and file offset already have reset values. In
// other words, calling reset_address_and_file_offset will not change them.
bool
this->is_offset_valid_ = true;
}
+ // Update the data size without finalizing it.
+ void
+ pre_finalize_data_size()
+ {
+ if (!this->is_data_size_valid_)
+ {
+ // Tell the child class to update the data size.
+ this->update_data_size();
+ }
+ }
+
// Finalize the data size.
void
finalize_data_size()
do_set_out_shndx(unsigned int)
{ gold_unreachable(); }
+ // This is a hook for derived classes to set the preliminary data size.
+ // This is called by pre_finalize_data_size, normally called during
+ // Layout::finalize, before the section address is set, and is used
+ // during an incremental update, when we need to know the size of a
+ // section before allocating space in the output file. For classes
+ // where the current data size is up to date, this default version of
+ // the method can be inherited.
+ virtual void
+ update_data_size()
+ { }
+
// This is a hook for derived classes to set the data size. This is
// called by finalize_data_size, normally called during
// Layout::finalize, when the section address is set.
}
// Fix the data size. Once it is fixed, it cannot be changed
- // and the data size remains always valid.
+ // and the data size remains always valid.
void
fix_data_size()
{
do_print_to_mapfile(Mapfile* mapfile) const
{ mapfile->print_output_data(this, _("** section headers")); }
+ // Update the data size.
+ void
+ update_data_size()
+ { this->set_data_size(this->do_size()); }
+
// Set final data size.
void
set_final_data_size()
class Output_file_header : public Output_data
{
public:
- Output_file_header(const Target*,
+ Output_file_header(Target*,
const Symbol_table*,
- const Output_segment_headers*,
- const char* entry);
+ const Output_segment_headers*);
// Add information about the section headers. We lay out the ELF
// file header before we create the section headers.
off_t
do_size() const;
- const Target* target_;
+ Target* target_;
const Symbol_table* symtab_;
const Output_segment_headers* segment_header_;
const Output_section_headers* section_header_;
const Output_section* shstrtab_;
- const char* entry_;
};
// Output sections are mainly comprised of input sections. However,
{ }
// Return the output section.
+ Output_section*
+ output_section()
+ { return this->output_section_; }
+
const Output_section*
output_section() const
{ return this->output_section_; }
bool
output_offset(const Relobj* object, unsigned int shndx,
section_offset_type offset,
- section_offset_type *poutput) const
+ section_offset_type* poutput) const
{ return this->do_output_offset(object, shndx, offset, poutput); }
- // Return whether this is the merge section for the input section
- // SHNDX in OBJECT. This should return true when output_offset
- // would return true for some values of OFFSET.
- bool
- is_merge_section_for(const Relobj* object, unsigned int shndx) const
- { return this->do_is_merge_section_for(object, shndx); }
-
// Write the contents to a buffer. This is used for sections which
// require postprocessing, such as compression.
void
section_offset_type*) const
{ return false; }
- // The child class may implement is_merge_section_for.
- virtual bool
- do_is_merge_section_for(const Relobj*, unsigned int) const
- { return false; }
-
// The child class may implement write_to_buffer. Most child
// classes can not appear in a compressed section, and they do not
// implement this.
: Output_section_data(addralign)
{ }
- // Get the current data size.
- off_t
- current_data_size() const
- { return this->current_data_size_for_child(); }
+ Output_section_data_build(off_t data_size, uint64_t addralign)
+ : Output_section_data(data_size, addralign, false)
+ { }
// Set the current data size.
void
map_name_(map_name)
{ }
+ explicit Output_data_space(off_t data_size, uint64_t addralign,
+ const char* map_name)
+ : Output_section_data_build(data_size, addralign),
+ map_name_(map_name)
+ { }
+
// Set the alignment.
void
set_space_alignment(uint64_t align)
{ }
protected:
+ // This is called to update the section size prior to assigning
+ // the address and file offset.
+ void
+ update_data_size()
+ { this->set_final_data_size(); }
+
// This is called to set the address and file offset. Here we make
// sure that the Stringpool is finalized.
void
// A reloc against a global symbol.
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
- Address address, bool is_relative, bool is_symbolless);
+ Address address, bool is_relative, bool is_symbolless,
+ bool use_plt_offset);
Output_reloc(Symbol* gsym, unsigned int type,
- Sized_relobj<size, big_endian>* relobj,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, bool is_relative,
- bool is_symbolless);
+ bool is_symbolless, bool use_plt_offset);
// A reloc against a local symbol or local section symbol.
Output_reloc(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index, unsigned int type,
Output_data* od, Address address, bool is_relative,
- bool is_symbolless, bool is_section_symbol);
+ bool is_symbolless, bool is_section_symbol,
+ bool use_plt_offset);
Output_reloc(Sized_relobj<size, big_endian>* relobj,
unsigned int local_sym_index, unsigned int type,
unsigned int shndx, Address address, bool is_relative,
- bool is_symbolless, bool is_section_symbol);
+ bool is_symbolless, bool is_section_symbol,
+ bool use_plt_offset);
// A reloc against the STT_SECTION symbol of an output section.
Output_reloc(Output_section* os, unsigned int type, Output_data* od,
- Address address);
+ Address address, bool is_relative);
Output_reloc(Output_section* os, unsigned int type,
- Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address);
+ Sized_relobj<size, big_endian>* relobj, unsigned int shndx,
+ Address address, bool is_relative);
- // An absolute relocation with no symbol.
+ // An absolute or relative relocation with no symbol.
- Output_reloc(unsigned int type, Output_data* od, Address address);
+ Output_reloc(unsigned int type, Output_data* od, Address address,
+ bool is_relative);
Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address);
+ unsigned int shndx, Address address, bool is_relative);
// A target specific relocation. The target will be called to get
// the symbol index, passing ARG. The type and offset will be set
is_local_section_symbol() const
{
return (this->local_sym_index_ != GSYM_CODE
- && this->local_sym_index_ != SECTION_CODE
- && this->local_sym_index_ != INVALID_CODE
+ && this->local_sym_index_ != SECTION_CODE
+ && this->local_sym_index_ != INVALID_CODE
&& this->local_sym_index_ != TARGET_CODE
- && this->is_section_symbol_);
+ && this->is_section_symbol_);
}
// Return whether this is a target specific relocation.
Address
symbol_value(Addend addend) const;
+ // If this relocation is against an input section, return the
+ // relocatable object containing the input section.
+ Sized_relobj<size, big_endian>*
+ get_relobj() const
+ {
+ if (this->shndx_ == INVALID_CODE)
+ return NULL;
+ return this->u2_.relobj;
+ }
+
// Write the reloc entry to an output view.
void
write(unsigned char* pov) const;
r2) const
{ return this->compare(r2) < 0; }
- private:
- // Record that we need a dynamic symbol index.
- void
- set_needs_dynsym_index();
-
// Return the symbol index.
unsigned int
get_symbol_index() const;
Address
get_address() const;
+ private:
+ // Record that we need a dynamic symbol index.
+ void
+ set_needs_dynsym_index();
+
// Codes for local_sym_index_.
enum
{
// input file.
unsigned int local_sym_index_;
// The reloc type--a processor specific code.
- unsigned int type_ : 29;
+ unsigned int type_ : 28;
// True if the relocation is a RELATIVE relocation.
bool is_relative_ : 1;
// True if the relocation is one which should not use
bool is_symbolless_ : 1;
// True if the relocation is against a section symbol.
bool is_section_symbol_ : 1;
+ // True if the addend should be the PLT offset.
+ // (Used only for RELA, but stored here for space.)
+ bool use_plt_offset_ : 1;
// 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.
Output_reloc(Symbol* gsym, unsigned int type, Output_data* od,
Address address, Addend addend, bool is_relative,
- bool is_symbolless)
- : rel_(gsym, type, od, address, is_relative, is_symbolless),
+ bool is_symbolless, bool use_plt_offset)
+ : rel_(gsym, type, od, address, is_relative, is_symbolless,
+ use_plt_offset),
addend_(addend)
{ }
Output_reloc(Symbol* gsym, unsigned int type,
- Sized_relobj<size, big_endian>* relobj,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, Addend addend,
- bool is_relative, bool is_symbolless)
+ bool is_relative, bool is_symbolless, bool use_plt_offset)
: rel_(gsym, type, relobj, shndx, address, is_relative,
- is_symbolless), addend_(addend)
+ is_symbolless, use_plt_offset), addend_(addend)
{ }
// A reloc against a local symbol.
unsigned int local_sym_index, unsigned int type,
Output_data* od, Address address,
Addend addend, bool is_relative,
- bool is_symbolless, bool is_section_symbol)
+ bool is_symbolless, bool is_section_symbol,
+ bool use_plt_offset)
: rel_(relobj, local_sym_index, type, od, address, is_relative,
- is_symbolless, is_section_symbol),
+ is_symbolless, is_section_symbol, use_plt_offset),
addend_(addend)
{ }
unsigned int local_sym_index, unsigned int type,
unsigned int shndx, Address address,
Addend addend, bool is_relative,
- bool is_symbolless, bool is_section_symbol)
+ bool is_symbolless, bool is_section_symbol,
+ bool use_plt_offset)
: rel_(relobj, local_sym_index, type, shndx, address, is_relative,
- is_symbolless, is_section_symbol),
+ is_symbolless, is_section_symbol, use_plt_offset),
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)
+ Address address, Addend addend, bool is_relative)
+ : rel_(os, type, od, address, is_relative), addend_(addend)
{ }
Output_reloc(Output_section* os, unsigned int type,
- Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address, Addend addend)
- : rel_(os, type, relobj, shndx, address), addend_(addend)
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Addend addend,
+ bool is_relative)
+ : rel_(os, type, relobj, shndx, address, is_relative), addend_(addend)
{ }
- // An absolute relocation with no symbol.
+ // An absolute or relative relocation with no symbol.
Output_reloc(unsigned int type, Output_data* od, Address address,
- Addend addend)
- : rel_(type, od, address), addend_(addend)
+ Addend addend, bool is_relative)
+ : rel_(type, od, address, is_relative), addend_(addend)
{ }
Output_reloc(unsigned int type, Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address, Addend addend)
- : rel_(type, relobj, shndx, address), addend_(addend)
+ unsigned int shndx, Address address, Addend addend,
+ bool is_relative)
+ : rel_(type, relobj, shndx, address, is_relative), addend_(addend)
{ }
// A target specific relocation. The target will be called to get
is_symbolless() const
{ return this->rel_.is_symbolless(); }
+ // If this relocation is against an input section, return the
+ // relocatable object containing the input section.
+ Sized_relobj<size, big_endian>*
+ get_relobj() const
+ { return this->rel_.get_relobj(); }
+
// Write the reloc entry to an output view.
void
write(unsigned char* pov) const;
sort_relocs() const
{ return this->sort_relocs_; }
+ // Add a reloc of type TYPE against the global symbol GSYM. The
+ // relocation applies to the data at offset ADDRESS within OD.
+ virtual void
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ uint64_t address, uint64_t addend) = 0;
+
+ // Add a reloc of type TYPE against the global symbol GSYM. The
+ // relocation applies to data at offset ADDRESS within section SHNDX
+ // of object file RELOBJ. OD is the associated output section.
+ virtual void
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ Relobj* relobj, unsigned int shndx, uint64_t address,
+ uint64_t addend) = 0;
+
+ // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX
+ // in RELOBJ. The relocation applies to the data at offset ADDRESS
+ // within OD.
+ virtual void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, uint64_t address,
+ uint64_t addend) = 0;
+
+ // Add a reloc of type TYPE against the local symbol LOCAL_SYM_INDEX
+ // in RELOBJ. The relocation applies to the data at offset ADDRESS
+ // within section SHNDX of RELOBJ. OD is the associated output
+ // section.
+ virtual void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, unsigned int shndx,
+ uint64_t address, uint64_t addend) = 0;
+
+ // Add a reloc of type TYPE against the STT_SECTION symbol of the
+ // output section OS. The relocation applies to the data at offset
+ // ADDRESS within OD.
+ virtual void
+ add_output_section_generic(Output_section *os, unsigned int type,
+ Output_data* od, uint64_t address,
+ uint64_t addend) = 0;
+
+ // Add a reloc of type TYPE against the STT_SECTION symbol of the
+ // output section OS. The relocation applies to the data at offset
+ // ADDRESS within section SHNDX of RELOBJ. OD is the associated
+ // output section.
+ virtual void
+ add_output_section_generic(Output_section* os, unsigned int type,
+ Output_data* od, Relobj* relobj,
+ unsigned int shndx, uint64_t address,
+ uint64_t addend) = 0;
+
protected:
// Note that we've added another relative reloc.
void
void
do_write(Output_file*);
+ // Generic implementation of do_write, allowing a customized
+ // class for writing the output relocation (e.g., for MIPS-64).
+ template<class Output_reloc_writer>
+ void
+ do_write_generic(Output_file* of)
+ {
+ const off_t off = this->offset();
+ const off_t oview_size = this->data_size();
+ unsigned char* const oview = of->get_output_view(off, oview_size);
+
+ if (this->sort_relocs())
+ {
+ gold_assert(dynamic);
+ std::sort(this->relocs_.begin(), this->relocs_.end(),
+ Sort_relocs_comparison());
+ }
+
+ unsigned char* pov = oview;
+ for (typename Relocs::const_iterator p = this->relocs_.begin();
+ p != this->relocs_.end();
+ ++p)
+ {
+ Output_reloc_writer::write(p, pov);
+ pov += reloc_size;
+ }
+
+ gold_assert(pov - oview == oview_size);
+
+ of->write_output_view(off, oview_size, oview);
+
+ // We no longer need the relocation entries.
+ this->relocs_.clear();
+ }
+
// Set the entry size and the link.
void
- do_adjust_output_section(Output_section *os);
+ do_adjust_output_section(Output_section* os);
// Write to a map file.
void
// Add a relocation entry.
void
- add(Output_data *od, const Output_reloc_type& reloc)
+ add(Output_data* od, const Output_reloc_type& reloc)
{
this->relocs_.push_back(reloc);
this->set_current_data_size(this->relocs_.size() * reloc_size);
- od->add_dynamic_reloc();
+ if (dynamic)
+ od->add_dynamic_reloc();
if (reloc.is_relative())
this->bump_relative_reloc_count();
+ Sized_relobj<size, big_endian>* relobj = reloc.get_relobj();
+ if (relobj != NULL)
+ relobj->add_dyn_reloc(this->relocs_.size() - 1);
}
private:
void
add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address)
- { this->add(od, Output_reloc_type(gsym, type, od, address, false, false)); }
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address,
+ false, false, false));
+ }
void
add_global(Symbol* gsym, unsigned int type, Output_data* od,
- Sized_relobj<size, big_endian>* relobj,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address)
- { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- false, false)); }
-
- // These are to simplify the Copy_relocs class.
+ {
+ this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ false, false, false));
+ }
void
- add_global(Symbol* gsym, unsigned int type, Output_data* od, Address address,
- Address addend)
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ uint64_t address, uint64_t addend)
{
gold_assert(addend == 0);
- this->add_global(gsym, type, od, address);
+ this->add(od, Output_reloc_type(gsym, type, od,
+ convert_types<Address, uint64_t>(address),
+ false, false, false));
}
void
- add_global(Symbol* gsym, unsigned int type, Output_data* od,
- Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address, Address addend)
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ Relobj* relobj, unsigned int shndx, uint64_t address,
+ uint64_t addend)
{
gold_assert(addend == 0);
- this->add_global(gsym, type, od, relobj, shndx, address);
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx,
+ convert_types<Address, uint64_t>(address),
+ false, false, false));
}
// Add a RELATIVE reloc against a global symbol. The final relocation
void
add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
- Address address)
- { this->add(od, Output_reloc_type(gsym, type, od, address, true, true)); }
+ Address address)
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address, true, true,
+ false));
+ }
void
add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
- Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address)
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address)
{
this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- true, true));
+ true, true, false));
}
// Add a global relocation which does not use a symbol for the relocation,
void
add_symbolless_global_addend(Symbol* gsym, unsigned int type,
Output_data* od, Address address)
- { this->add(od, Output_reloc_type(gsym, type, od, address, false, true)); }
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address, false, true,
+ false));
+ }
void
add_symbolless_global_addend(Symbol* gsym, unsigned int type,
unsigned int shndx, Address address)
{
this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- false, true));
+ false, true, false));
}
// Add a reloc against a local symbol.
Output_data* od, Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od,
- address, false, false, false));
+ address, false, false, false, false));
}
void
Output_data* od, unsigned int shndx, Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, false, false, false));
+ address, false, false, false, false));
+ }
+
+ void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, uint64_t address,
+ uint64_t addend)
+ {
+ gold_assert(addend == 0);
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian> *>(relobj);
+ this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od,
+ convert_types<Address, uint64_t>(address),
+ false, false, false, false));
+ }
+
+ void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, unsigned int shndx,
+ uint64_t address, uint64_t addend)
+ {
+ gold_assert(addend == 0);
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx,
+ convert_types<Address, uint64_t>(address),
+ false, false, false, false));
}
// Add a RELATIVE reloc against a local symbol.
void
add_local_relative(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- Output_data* od, Address address)
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od,
- address, true, true, false));
+ address, true, true, false, false));
}
void
add_local_relative(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- Output_data* od, unsigned int shndx, Address address)
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, true, true, false));
+ address, true, true, false, false));
+ }
+
+ void
+ add_local_relative(Sized_relobj<size, big_endian>* relobj,
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address,
+ bool use_plt_offset)
+ {
+ this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
+ address, true, true, false,
+ use_plt_offset));
}
// Add a local relocation which does not use a symbol for the relocation,
Output_data* od, Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od,
- address, false, true, false));
+ address, false, true, false, false));
}
void
Address address)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, false, true, false));
+ address, false, true, false, false));
}
// Add a reloc against a local section symbol. This will be
void
add_local_section(Sized_relobj<size, big_endian>* relobj,
- unsigned int input_shndx, unsigned int type,
- Output_data* od, Address address)
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, Address address)
{
this->add(od, Output_reloc_type(relobj, input_shndx, type, od,
- address, false, false, true));
+ address, false, false, true, false));
}
void
add_local_section(Sized_relobj<size, big_endian>* relobj,
- unsigned int input_shndx, unsigned int type,
- Output_data* od, unsigned int shndx, Address address)
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address)
{
this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx,
- address, false, false, true));
+ address, false, false, true, false));
}
// 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(od, Output_reloc_type(os, type, od, address)); }
+ { this->add(od, Output_reloc_type(os, type, od, address, false)); }
void
add_output_section(Output_section* os, unsigned int type, Output_data* od,
Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address)
- { this->add(od, Output_reloc_type(os, type, relobj, shndx, address)); }
+ unsigned int shndx, Address address)
+ { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, false)); }
+
+ void
+ add_output_section_generic(Output_section* os, unsigned int type,
+ Output_data* od, uint64_t address,
+ uint64_t addend)
+ {
+ gold_assert(addend == 0);
+ this->add(od, Output_reloc_type(os, type, od,
+ convert_types<Address, uint64_t>(address),
+ false));
+ }
+
+ void
+ add_output_section_generic(Output_section* os, unsigned int type,
+ Output_data* od, Relobj* relobj,
+ unsigned int shndx, uint64_t address,
+ uint64_t addend)
+ {
+ gold_assert(addend == 0);
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(os, type, sized_relobj, shndx,
+ convert_types<Address, uint64_t>(address),
+ false));
+ }
+
+ // As above, but the reloc TYPE is relative
+
+ void
+ add_output_section_relative(Output_section* os, unsigned int type,
+ Output_data* od, Address address)
+ { this->add(od, Output_reloc_type(os, type, od, address, true)); }
+
+ void
+ add_output_section_relative(Output_section* os, unsigned int type,
+ Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address)
+ { this->add(od, Output_reloc_type(os, type, relobj, shndx, address, true)); }
// Add an absolute relocation.
void
add_absolute(unsigned int type, Output_data* od, Address address)
- { this->add(od, Output_reloc_type(type, od, address)); }
+ { this->add(od, Output_reloc_type(type, od, address, false)); }
void
add_absolute(unsigned int type, Output_data* od,
Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address)
- { this->add(od, Output_reloc_type(type, relobj, shndx, address)); }
+ { this->add(od, Output_reloc_type(type, relobj, shndx, address, false)); }
+
+ // Add a relative relocation
+
+ void
+ add_relative(unsigned int type, Output_data* od, Address address)
+ { this->add(od, Output_reloc_type(type, od, address, true)); }
+
+ void
+ add_relative(unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address)
+ { this->add(od, Output_reloc_type(type, relobj, shndx, address, true)); }
// Add a target specific relocation. A target which calls this must
// define the reloc_symbol_index and reloc_addend virtual functions.
void
add_global(Symbol* gsym, unsigned int type, Output_data* od,
Address address, Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, od, address, addend,
- false, false)); }
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address, addend,
+ false, false, false));
+ }
void
add_global(Symbol* gsym, unsigned int type, Output_data* od,
- Sized_relobj<size, big_endian>* relobj,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address,
Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- addend, false, false)); }
+ {
+ this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ addend, false, false, false));
+ }
+
+ void
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ uint64_t address, uint64_t addend)
+ {
+ this->add(od, Output_reloc_type(gsym, type, od,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false, false, false));
+ }
+
+ void
+ add_global_generic(Symbol* gsym, unsigned int type, Output_data* od,
+ Relobj* relobj, unsigned int shndx, uint64_t address,
+ uint64_t addend)
+ {
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(gsym, type, sized_relobj, shndx,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false, false, false));
+ }
// Add a RELATIVE reloc against a global symbol. The final output
// relocation will not reference the symbol, but we must keep the symbol
void
add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
- Address address, Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, od, address, addend, true,
- true)); }
+ Address address, Addend addend, bool use_plt_offset)
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address, addend, true,
+ true, use_plt_offset));
+ }
void
add_global_relative(Symbol* gsym, unsigned int type, Output_data* od,
- Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address, Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- addend, true, true)); }
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Addend addend,
+ bool use_plt_offset)
+ {
+ this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ addend, true, true, use_plt_offset));
+ }
// Add a global relocation which does not use a symbol for the relocation,
// but which gets its addend from a symbol.
void
add_symbolless_global_addend(Symbol* gsym, unsigned int type, Output_data* od,
Address address, Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, od, address, addend,
- false, true)); }
+ {
+ this->add(od, Output_reloc_type(gsym, type, od, address, addend,
+ false, true, false));
+ }
void
add_symbolless_global_addend(Symbol* gsym, unsigned int type,
Output_data* od,
Sized_relobj<size, big_endian>* relobj,
- unsigned int shndx, Address address, Addend addend)
- { this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
- addend, false, true)); }
+ unsigned int shndx, Address address,
+ Addend addend)
+ {
+ this->add(od, Output_reloc_type(gsym, type, relobj, shndx, address,
+ addend, false, true, false));
+ }
// Add a reloc against a local symbol.
Output_data* od, Address address, Addend addend)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address,
- addend, false, false, false));
+ addend, false, false, false, false));
}
void
Addend addend)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, addend, false, false, false));
+ address, addend, false, false, false,
+ false));
+ }
+
+ void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, uint64_t address,
+ uint64_t addend)
+ {
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian> *>(relobj);
+ this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, od,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false, false, false, false));
+ }
+
+ void
+ add_local_generic(Relobj* relobj, unsigned int local_sym_index,
+ unsigned int type, Output_data* od, unsigned int shndx,
+ uint64_t address, uint64_t addend)
+ {
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(sized_relobj, local_sym_index, type, shndx,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false, false, false, false));
}
// Add a RELATIVE reloc against a local symbol.
void
add_local_relative(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- Output_data* od, Address address, Addend addend)
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, Address address, Addend addend,
+ bool use_plt_offset)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address,
- addend, true, true, false));
+ addend, true, true, false,
+ use_plt_offset));
}
void
add_local_relative(Sized_relobj<size, big_endian>* relobj,
- unsigned int local_sym_index, unsigned int type,
- Output_data* od, unsigned int shndx, Address address,
- Addend addend)
+ unsigned int local_sym_index, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address,
+ Addend addend, bool use_plt_offset)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, addend, true, true, false));
+ address, addend, true, true, false,
+ use_plt_offset));
}
// Add a local relocation which does not use a symbol for the relocation,
Output_data* od, Address address, Addend addend)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, od, address,
- addend, false, true, false));
+ addend, false, true, false, false));
}
void
Address address, Addend addend)
{
this->add(od, Output_reloc_type(relobj, local_sym_index, type, shndx,
- address, addend, false, true, false));
+ address, addend, false, true, false,
+ false));
}
// Add a reloc against a local section symbol. This will be
void
add_local_section(Sized_relobj<size, big_endian>* relobj,
- unsigned int input_shndx, unsigned int type,
- Output_data* od, Address address, Addend addend)
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, Address address, Addend addend)
{
this->add(od, Output_reloc_type(relobj, input_shndx, type, od, address,
- addend, false, false, true));
+ addend, false, false, true, false));
}
void
add_local_section(Sized_relobj<size, big_endian>* relobj,
- unsigned int input_shndx, unsigned int type,
- Output_data* od, unsigned int shndx, Address address,
- Addend addend)
+ unsigned int input_shndx, unsigned int type,
+ Output_data* od, unsigned int shndx, Address address,
+ Addend addend)
{
this->add(od, Output_reloc_type(relobj, input_shndx, type, shndx,
- address, addend, false, false, true));
+ address, addend, false, false, true,
+ false));
}
// 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, Addend addend)
- { this->add(os, Output_reloc_type(os, type, od, address, addend)); }
+ { this->add(od, Output_reloc_type(os, type, od, address, addend, false)); }
void
- add_output_section(Output_section* os, unsigned int type,
- Sized_relobj<size, big_endian>* relobj,
+ add_output_section(Output_section* os, unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, Addend addend)
- { this->add(os, Output_reloc_type(os, type, relobj, shndx, address,
- addend)); }
+ {
+ this->add(od, Output_reloc_type(os, type, relobj, shndx, address,
+ addend, false));
+ }
+
+ void
+ add_output_section_generic(Output_section* os, unsigned int type,
+ Output_data* od, uint64_t address,
+ uint64_t addend)
+ {
+ this->add(od, Output_reloc_type(os, type, od,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false));
+ }
+
+ void
+ add_output_section_generic(Output_section* os, unsigned int type,
+ Output_data* od, Relobj* relobj,
+ unsigned int shndx, uint64_t address,
+ uint64_t addend)
+ {
+ Sized_relobj<size, big_endian>* sized_relobj =
+ static_cast<Sized_relobj<size, big_endian>*>(relobj);
+ this->add(od, Output_reloc_type(os, type, sized_relobj, shndx,
+ convert_types<Address, uint64_t>(address),
+ convert_types<Addend, uint64_t>(addend),
+ false));
+ }
+
+ // As above, but the reloc TYPE is relative
+
+ void
+ add_output_section_relative(Output_section* os, unsigned int type,
+ Output_data* od, Address address, Addend addend)
+ { this->add(od, Output_reloc_type(os, type, od, address, addend, true)); }
+
+ void
+ add_output_section_relative(Output_section* os, unsigned int type,
+ Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address,
+ Addend addend)
+ {
+ this->add(od, Output_reloc_type(os, type, relobj, shndx,
+ address, addend, true));
+ }
// Add an absolute relocation.
void
add_absolute(unsigned int type, Output_data* od, Address address,
Addend addend)
- { this->add(od, Output_reloc_type(type, od, address, addend)); }
+ { this->add(od, Output_reloc_type(type, od, address, addend, false)); }
void
add_absolute(unsigned int type, Output_data* od,
Sized_relobj<size, big_endian>* relobj,
unsigned int shndx, Address address, Addend addend)
- { this->add(od, Output_reloc_type(type, relobj, shndx, address, addend)); }
+ {
+ this->add(od, Output_reloc_type(type, relobj, shndx, address, addend,
+ false));
+ }
+
+ // Add a relative relocation
+
+ void
+ add_relative(unsigned int type, Output_data* od, Address address,
+ Addend addend)
+ { this->add(od, Output_reloc_type(type, od, address, addend, true)); }
+
+ void
+ add_relative(unsigned int type, Output_data* od,
+ Sized_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Address address, Addend addend)
+ {
+ this->add(od, Output_reloc_type(type, relobj, shndx, address, addend,
+ true));
+ }
// Add a target specific relocation. A target which calls this must
// define the reloc_symbol_index and reloc_addend virtual functions.
// Output_relocatable_relocs represents a relocation section in a
// relocatable link. The actual data is written out in the target
-// hook relocate_for_relocatable. This just saves space for it.
+// hook relocate_relocs. This just saves space for it.
template<int sh_type, int size, bool big_endian>
class Output_relocatable_relocs : public Output_section_data
{
public:
// The constructor clears *INPUT_SHNDXES.
- Output_data_group(Sized_relobj<size, big_endian>* relobj,
+ Output_data_group(Sized_relobj_file<size, big_endian>* relobj,
section_size_type entry_count,
elfcpp::Elf_Word flags,
std::vector<unsigned int>* input_shndxes);
private:
// The input object.
- Sized_relobj<size, big_endian>* relobj_;
+ Sized_relobj_file<size, big_endian>* relobj_;
// The group flag word.
elfcpp::Elf_Word flags_;
// The section indexes of the input sections in this group.
// Output_data_got is used to manage a GOT. Each entry in the GOT is
// for one symbol--either a global symbol or a local symbol in an
// object. The target specific code adds entries to the GOT as
-// needed.
+// needed. The GOT_SIZE template parameter is the size in bits of a
+// GOT entry, typically 32 or 64.
-template<int size, bool big_endian>
-class Output_data_got : public Output_section_data_build
+class Output_data_got_base : public Output_section_data_build
{
public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
- typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> Rel_dyn;
- typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
+ Output_data_got_base(uint64_t align)
+ : Output_section_data_build(align)
+ { }
+
+ Output_data_got_base(off_t data_size, uint64_t align)
+ : Output_section_data_build(data_size, align)
+ { }
+
+ // Reserve the slot at index I in the GOT.
+ void
+ reserve_slot(unsigned int i)
+ { this->do_reserve_slot(i); }
+
+ protected:
+ // Reserve the slot at index I in the GOT.
+ virtual void
+ do_reserve_slot(unsigned int i) = 0;
+};
+
+template<int got_size, bool big_endian>
+class Output_data_got : public Output_data_got_base
+{
+ public:
+ typedef typename elfcpp::Elf_types<got_size>::Elf_Addr Valtype;
Output_data_got()
- : Output_section_data_build(Output_data::default_alignment_for_size(size)),
- entries_()
+ : Output_data_got_base(Output_data::default_alignment_for_size(got_size)),
+ entries_(), free_list_()
{ }
+ Output_data_got(off_t data_size)
+ : Output_data_got_base(data_size,
+ Output_data::default_alignment_for_size(got_size)),
+ entries_(), free_list_()
+ {
+ // For an incremental update, we have an existing GOT section.
+ // Initialize the list of entries and the free list.
+ this->entries_.resize(data_size / (got_size / 8));
+ this->free_list_.init(data_size, false);
+ }
+
// Add an entry for a global symbol to the GOT. Return true if this
// is a new GOT entry, false if the symbol was already in the GOT.
bool
add_global(Symbol* gsym, unsigned int got_type);
+ // Like add_global, but use the PLT offset of the global symbol if
+ // it has one.
+ bool
+ add_global_plt(Symbol* gsym, unsigned int got_type);
+
+ // Like add_global, but for a TLS symbol where the value will be
+ // offset using Target::tls_offset_for_global.
+ bool
+ add_global_tls(Symbol* gsym, unsigned int got_type)
+ { return add_global_plt(gsym, got_type); }
+
// Add an entry for a global symbol to the GOT, and add a dynamic
// relocation of type R_TYPE for the GOT entry.
void
add_global_with_rel(Symbol* gsym, unsigned int got_type,
- Rel_dyn* rel_dyn, unsigned int r_type);
-
- void
- add_global_with_rela(Symbol* gsym, unsigned int got_type,
- Rela_dyn* rela_dyn, unsigned int r_type);
+ Output_data_reloc_generic* rel_dyn, unsigned int r_type);
// Add a pair of entries for a global symbol to the GOT, and add
// dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
void
add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
- Rel_dyn* rel_dyn, unsigned int r_type_1,
- unsigned int r_type_2);
-
- void
- add_global_pair_with_rela(Symbol* gsym, unsigned int got_type,
- Rela_dyn* rela_dyn, unsigned int r_type_1,
- unsigned int r_type_2);
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type_1, unsigned int r_type_2);
// Add an entry for a local symbol to the GOT. This returns true if
// this is a new GOT entry, false if the symbol already has a GOT
// entry.
bool
- add_local(Sized_relobj<size, big_endian>* object, unsigned int sym_index,
- unsigned int got_type);
+ add_local(Relobj* object, unsigned int sym_index, unsigned int got_type);
+
+ // Add an entry for a local symbol plus ADDEND to the GOT. This returns
+ // true if this is a new GOT entry, false if the symbol already has a GOT
+ // entry.
+ bool
+ add_local(Relobj* object, unsigned int sym_index, unsigned int got_type,
+ uint64_t addend);
+
+ // Like add_local, but use the PLT offset of the local symbol if it
+ // has one.
+ bool
+ add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type);
+
+ // Like add_local, but for a TLS symbol where the value will be
+ // offset using Target::tls_offset_for_local.
+ bool
+ add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
+ { return add_local_plt(object, sym_index, got_type); }
// Add an entry for a local symbol to the GOT, and add a dynamic
// relocation of type R_TYPE for the GOT entry.
void
- add_local_with_rel(Sized_relobj<size, big_endian>* object,
- unsigned int sym_index, unsigned int got_type,
- Rel_dyn* rel_dyn, unsigned int r_type);
+ add_local_with_rel(Relobj* object, unsigned int sym_index,
+ unsigned int got_type, Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type);
+ // Add an entry for a local symbol plus ADDEND to the GOT, and add a dynamic
+ // relocation of type R_TYPE for the GOT entry.
void
- add_local_with_rela(Sized_relobj<size, big_endian>* object,
- unsigned int sym_index, unsigned int got_type,
- Rela_dyn* rela_dyn, unsigned int r_type);
+ add_local_with_rel(Relobj* object, unsigned int sym_index,
+ unsigned int got_type, Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type, uint64_t addend);
// Add a pair of entries for a local symbol to the GOT, and add
- // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
- void
- add_local_pair_with_rel(Sized_relobj<size, big_endian>* object,
- unsigned int sym_index, unsigned int shndx,
- unsigned int got_type, Rel_dyn* rel_dyn,
- unsigned int r_type_1, unsigned int r_type_2);
+ // a dynamic relocation of type R_TYPE using the section symbol of
+ // the output section to which input section SHNDX maps, on the first.
+ // The first got entry will have a value of zero, the second the
+ // value of the local symbol.
+ void
+ add_local_pair_with_rel(Relobj* object, unsigned int sym_index,
+ unsigned int shndx, unsigned int got_type,
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type);
+
+ // Add a pair of entries for a local symbol plus ADDEND to the GOT, and add
+ // a dynamic relocation of type R_TYPE using the section symbol of
+ // the output section to which input section SHNDX maps, on the first.
+ // The first got entry will have a value of zero, the second the
+ // value of the local symbol.
+ void
+ add_local_pair_with_rel(Relobj* object, unsigned int sym_index,
+ unsigned int shndx, unsigned int got_type,
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type, uint64_t addend);
+ // Add a pair of entries for a local symbol to the GOT, and add
+ // a dynamic relocation of type R_TYPE using STN_UNDEF on the first.
+ // The first got entry will have a value of zero, the second the
+ // value of the local symbol offset by Target::tls_offset_for_local.
void
- add_local_pair_with_rela(Sized_relobj<size, big_endian>* object,
- unsigned int sym_index, unsigned int shndx,
- unsigned int got_type, Rela_dyn* rela_dyn,
- unsigned int r_type_1, unsigned int r_type_2);
+ add_local_tls_pair(Relobj* object, unsigned int sym_index,
+ unsigned int got_type,
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type);
// Add a constant to the GOT. This returns the offset of the new
// entry from the start of the GOT.
unsigned int
add_constant(Valtype constant)
+ { return this->add_got_entry(Got_entry(constant)); }
+
+ // Add a pair of constants to the GOT. This returns the offset of
+ // the new entry from the start of the GOT.
+ unsigned int
+ add_constant_pair(Valtype c1, Valtype c2)
+ { return this->add_got_entry_pair(Got_entry(c1), Got_entry(c2)); }
+
+ // Replace GOT entry I with a new constant.
+ void
+ replace_constant(unsigned int i, Valtype constant)
{
- this->entries_.push_back(Got_entry(constant));
- this->set_got_size();
- return this->last_got_offset();
+ this->replace_got_entry(i, Got_entry(constant));
}
+ // Reserve a slot in the GOT for a local symbol.
+ void
+ reserve_local(unsigned int i, Relobj* object, unsigned int sym_index,
+ unsigned int got_type);
+
+ // Reserve a slot in the GOT for a global symbol.
+ void
+ reserve_global(unsigned int i, Symbol* gsym, unsigned int got_type);
+
protected:
// Write out the GOT table.
void
do_print_to_mapfile(Mapfile* mapfile) const
{ mapfile->print_output_data(this, _("** GOT")); }
+ // Reserve the slot at index I in the GOT.
+ virtual void
+ do_reserve_slot(unsigned int i)
+ { this->free_list_.remove(i * got_size / 8, (i + 1) * got_size / 8); }
+
+ // Return the number of words in the GOT.
+ unsigned int
+ num_entries () const
+ { return this->entries_.size(); }
+
+ // Return the offset into the GOT of GOT entry I.
+ unsigned int
+ got_offset(unsigned int i) const
+ { return i * (got_size / 8); }
+
private:
// This POD class holds a single GOT entry.
class Got_entry
public:
// Create a zero entry.
Got_entry()
- : local_sym_index_(CONSTANT_CODE)
+ : local_sym_index_(RESERVED_CODE), use_plt_or_tls_offset_(false),
+ addend_(0)
{ this->u_.constant = 0; }
// Create a global symbol entry.
- explicit Got_entry(Symbol* gsym)
- : local_sym_index_(GSYM_CODE)
+ Got_entry(Symbol* gsym, bool use_plt_or_tls_offset)
+ : local_sym_index_(GSYM_CODE),
+ use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(0)
{ this->u_.gsym = gsym; }
// Create a local symbol entry.
- Got_entry(Sized_relobj<size, big_endian>* object,
- unsigned int local_sym_index)
- : local_sym_index_(local_sym_index)
+ Got_entry(Relobj* object, unsigned int local_sym_index,
+ bool use_plt_or_tls_offset)
+ : local_sym_index_(local_sym_index),
+ use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(0)
{
gold_assert(local_sym_index != GSYM_CODE
- && local_sym_index != CONSTANT_CODE);
+ && local_sym_index != CONSTANT_CODE
+ && local_sym_index != RESERVED_CODE
+ && local_sym_index == this->local_sym_index_);
+ this->u_.object = object;
+ }
+
+ // Create a local symbol entry plus addend.
+ Got_entry(Relobj* object, unsigned int local_sym_index,
+ bool use_plt_or_tls_offset, uint64_t addend)
+ : local_sym_index_(local_sym_index),
+ use_plt_or_tls_offset_(use_plt_or_tls_offset), addend_(addend)
+ {
+ gold_assert(local_sym_index != GSYM_CODE
+ && local_sym_index != CONSTANT_CODE
+ && local_sym_index != RESERVED_CODE
+ && local_sym_index == this->local_sym_index_);
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.
explicit Got_entry(Valtype constant)
- : local_sym_index_(CONSTANT_CODE)
+ : local_sym_index_(CONSTANT_CODE), use_plt_or_tls_offset_(false)
{ this->u_.constant = constant; }
// Write the GOT entry to an output view.
void
- write(unsigned char* pov) const;
+ write(unsigned int got_indx, unsigned char* pov) const;
private:
enum
{
- GSYM_CODE = -1U,
- CONSTANT_CODE = -2U
+ GSYM_CODE = 0x7fffffff,
+ CONSTANT_CODE = 0x7ffffffe,
+ RESERVED_CODE = 0x7ffffffd
};
union
{
// For a local symbol, the object.
- Sized_relobj<size, big_endian>* object;
+ Relobj* object;
// For a global symbol, the symbol.
Symbol* gsym;
// For a constant, the constant.
} u_;
// For a local symbol, the local symbol index. This is GSYM_CODE
// for a global symbol, or CONSTANT_CODE for a constant.
- unsigned int local_sym_index_;
+ unsigned int local_sym_index_ : 31;
+ // Whether to use the PLT offset of the symbol if it has one.
+ // For TLS symbols, whether to offset the symbol value.
+ bool use_plt_or_tls_offset_ : 1;
+ // The addend.
+ uint64_t addend_;
};
typedef std::vector<Got_entry> Got_entries;
- // Return the offset into the GOT of GOT entry I.
+ // Create a new GOT entry and return its offset.
unsigned int
- got_offset(unsigned int i) const
- { return i * (size / 8); }
+ add_got_entry(Got_entry got_entry);
+
+ // Create a pair of new GOT entries and return the offset of the first.
+ unsigned int
+ add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2);
+
+ // Replace GOT entry I with a new value.
+ void
+ replace_got_entry(unsigned int i, Got_entry got_entry);
// Return the offset into the GOT of the last entry added.
unsigned int
last_got_offset() const
- { return this->got_offset(this->entries_.size() - 1); }
+ { return this->got_offset(this->num_entries() - 1); }
// Set the size of the section.
void
set_got_size()
- { this->set_current_data_size(this->got_offset(this->entries_.size())); }
+ { this->set_current_data_size(this->got_offset(this->num_entries())); }
// The list of GOT entries.
Got_entries entries_;
+
+ // List of available regions within the section, for incremental
+ // update links.
+ Free_list free_list_;
};
// Output_data_dynamic is used to hold the data in SHT_DYNAMIC
// plus a constant offset.
void
add_section_plus_offset(elfcpp::DT tag, const Output_data* od,
- unsigned int offset)
+ unsigned int offset)
{ this->add_entry(Dynamic_entry(tag, od, offset)); }
// Add a new dynamic entry with the size of output data.
add_string(elfcpp::DT tag, const std::string& str)
{ this->add_string(tag, str.c_str()); }
+ // Add a new dynamic entry with custom value.
+ void
+ add_custom(elfcpp::DT tag)
+ { this->add_entry(Dynamic_entry(tag)); }
+
+ // Get a dynamic entry offset.
+ unsigned int
+ get_entry_offset(elfcpp::DT tag) const;
+
protected:
// Adjust the output section to set the entry size.
void
: tag_(tag), offset_(DYNAMIC_STRING)
{ this->u_.str = str; }
+ // Create an entry with a custom value.
+ Dynamic_entry(elfcpp::DT tag)
+ : tag_(tag), offset_(DYNAMIC_CUSTOM)
+ { }
+
// Return the tag of this entry.
elfcpp::DT
tag() const
DYNAMIC_NUMBER = -1U,
// Section size.
DYNAMIC_SECTION_SIZE = -2U,
- // Symbol adress.
+ // Symbol address.
DYNAMIC_SYMBOL = -3U,
// String.
- DYNAMIC_STRING = -4U
+ DYNAMIC_STRING = -4U,
+ // Custom value.
+ DYNAMIC_CUSTOM = -5U
// Any other value indicates a section address plus OFFSET.
};
uint64_t addralign)
: Output_section_data_build(addralign), relobj_(relobj), shndx_(shndx)
{ }
-
+
// Return the Relobj of this relaxed input section.
Relobj*
relobj() const
{ return this->relobj_; }
-
+
// Return the section index of this relaxed input section.
unsigned int
shndx() const
{ return this->shndx_; }
+ protected:
+ void
+ set_relobj(Relobj* relobj)
+ { this->relobj_ = relobj; }
+
+ void
+ set_shndx(unsigned int shndx)
+ { this->shndx_ = shndx; }
+
private:
Relobj* relobj_;
unsigned int shndx_;
h = (h ^ static_cast<uint64_t>(this->addralign_)) * prime;
return h;
}
-
+
// Functors for associative containers.
struct equal_to
{
public:
Output_section_lookup_maps()
: is_valid_(true), merge_sections_by_properties_(),
- merge_sections_by_id_(), relaxed_input_sections_by_id_()
+ relaxed_input_sections_by_id_()
{ }
// Whether the maps are valid.
clear()
{
this->merge_sections_by_properties_.clear();
- this->merge_sections_by_id_.clear();
this->relaxed_input_sections_by_id_.clear();
// A cleared map is valid.
this->is_valid_ = true;
}
-
+
// Find a merge section by merge section properties. Return NULL if none
// is found.
Output_merge_base*
return p != this->merge_sections_by_properties_.end() ? p->second : NULL;
}
- // Find a merge section by section ID of a merge input section. Return NULL
- // if none is found.
- Output_merge_base*
- find_merge_section(const Object* object, unsigned int shndx) const
- {
- gold_assert(this->is_valid_);
- Merge_sections_by_id::const_iterator p =
- this->merge_sections_by_id_.find(Const_section_id(object, shndx));
- return p != this->merge_sections_by_id_.end() ? p->second : NULL;
- }
-
// Add a merge section pointed by POMB with properties MSP.
void
add_merge_section(const Merge_section_properties& msp,
this->merge_sections_by_properties_.insert(value);
gold_assert(result.second);
}
-
- // Add a mapping from a merged input section in OBJECT with index SHNDX
- // to a merge output section pointed by POMB.
- void
- add_merge_input_section(const Object* object, unsigned int shndx,
- Output_merge_base* pomb)
- {
- Const_section_id csid(object, shndx);
- std::pair<Const_section_id, Output_merge_base*> value(csid, pomb);
- std::pair<Merge_sections_by_id::iterator, bool> result =
- this->merge_sections_by_id_.insert(value);
- gold_assert(result.second);
- }
// Find a relaxed input section of OBJECT with index SHNDX.
Output_relaxed_input_section*
- find_relaxed_input_section(const Object* object, unsigned int shndx) const
+ find_relaxed_input_section(const Relobj* object, unsigned int shndx) const
{
gold_assert(this->is_valid_);
Relaxed_input_sections_by_id::const_iterator p =
}
private:
- typedef Unordered_map<Const_section_id, Output_merge_base*,
- Const_section_id_hash>
- Merge_sections_by_id;
+ typedef Unordered_map<Merge_section_properties, Output_merge_base*,
+ Merge_section_properties::hash,
+ Merge_section_properties::equal_to>
+ Merge_sections_by_properties;
+
+ typedef Unordered_map<Const_section_id, Output_relaxed_input_section*,
+ Const_section_id_hash>
+ Relaxed_input_sections_by_id;
+
+ // Whether this is valid
+ bool is_valid_;
+ // Merge sections by merge section properties.
+ Merge_sections_by_properties merge_sections_by_properties_;
+ // Relaxed sections by section IDs.
+ Relaxed_input_sections_by_id relaxed_input_sections_by_id_;
+};
+
+// This abstract base class defines the interface for the
+// types of methods used to fill free space left in an output
+// section during an incremental link. These methods are used
+// to insert dummy compilation units into debug info so that
+// debug info consumers can scan the debug info serially.
+
+class Output_fill
+{
+ public:
+ Output_fill()
+ : is_big_endian_(parameters->target().is_big_endian())
+ { }
+
+ virtual
+ ~Output_fill()
+ { }
+
+ // Return the smallest size chunk of free space that can be
+ // filled with a dummy compilation unit.
+ size_t
+ minimum_hole_size() const
+ { return this->do_minimum_hole_size(); }
+
+ // Write a fill pattern of length LEN at offset OFF in the file.
+ void
+ write(Output_file* of, off_t off, size_t len) const
+ { this->do_write(of, off, len); }
+
+ protected:
+ virtual size_t
+ do_minimum_hole_size() const = 0;
+
+ virtual void
+ do_write(Output_file* of, off_t off, size_t len) const = 0;
+
+ bool
+ is_big_endian() const
+ { return this->is_big_endian_; }
+
+ private:
+ bool is_big_endian_;
+};
+
+// Fill method that introduces a dummy compilation unit in
+// a .debug_info or .debug_types section.
+
+class Output_fill_debug_info : public Output_fill
+{
+ public:
+ Output_fill_debug_info(bool is_debug_types)
+ : is_debug_types_(is_debug_types)
+ { }
+
+ protected:
+ virtual size_t
+ do_minimum_hole_size() const;
+
+ virtual void
+ do_write(Output_file* of, off_t off, size_t len) const;
+
+ private:
+ // Version of the header.
+ static const int version = 4;
+ // True if this is a .debug_types section.
+ bool is_debug_types_;
+};
- typedef Unordered_map<Merge_section_properties, Output_merge_base*,
- Merge_section_properties::hash,
- Merge_section_properties::equal_to>
- Merge_sections_by_properties;
+// Fill method that introduces a dummy compilation unit in
+// a .debug_line section.
- typedef Unordered_map<Const_section_id, Output_relaxed_input_section*,
- Const_section_id_hash>
- Relaxed_input_sections_by_id;
+class Output_fill_debug_line : public Output_fill
+{
+ public:
+ Output_fill_debug_line()
+ { }
- // Whether this is valid
- bool is_valid_;
- // Merge sections by merge section properties.
- Merge_sections_by_properties merge_sections_by_properties_;
- // Merge sections by section IDs.
- Merge_sections_by_id merge_sections_by_id_;
- // Relaxed sections by section IDs.
- Relaxed_input_sections_by_id relaxed_input_sections_by_id_;
+ protected:
+ virtual size_t
+ do_minimum_hole_size() const;
+
+ virtual void
+ do_write(Output_file* of, off_t off, size_t len) const;
+
+ private:
+ // Version of the header. We write a DWARF-3 header because it's smaller
+ // and many tools have not yet been updated to understand the DWARF-4 header.
+ static const int version = 3;
+ // Length of the portion of the header that follows the header_length
+ // field. This includes the following fields:
+ // minimum_instruction_length, default_is_stmt, line_base, line_range,
+ // opcode_base, standard_opcode_lengths[], include_directories, filenames.
+ // The standard_opcode_lengths array is 12 bytes long, and the
+ // include_directories and filenames fields each contain only a single
+ // null byte.
+ static const size_t header_length = 19;
};
// An output section. We don't expect to have too many output
// within the output section.
template<int size, bool big_endian>
off_t
- add_input_section(Layout* layout, Sized_relobj<size, big_endian>* object,
- unsigned int shndx, const char *name,
+ add_input_section(Layout* layout, Sized_relobj_file<size, big_endian>* object,
+ unsigned int shndx, const char* name,
const elfcpp::Shdr<size, big_endian>& shdr,
unsigned int reloc_shndx, bool have_sections_script);
void
add_output_section_data(Output_section_data* posd);
- // Add a relaxed input section PORIS to this output section.
+ // Add a relaxed input section PORIS called NAME to this output section
+ // with LAYOUT.
void
- add_relaxed_input_section(Output_relaxed_input_section* poris);
+ add_relaxed_input_section(Layout* layout,
+ Output_relaxed_input_section* poris,
+ const std::string& name);
// Return the section name.
const char*
flags() const
{ return this->flags_; }
+ typedef std::map<Section_id, unsigned int> Section_layout_order;
+
+ void
+ update_section_layout(const Section_layout_order* order_map);
+
// Update the output section flags based on input section flags.
void
update_flags_for_input_section(elfcpp::Elf_Xword flags);
+ // Set the output section flags.
+ void
+ set_flags(elfcpp::Elf_Xword flags)
+ { this->flags_ = flags; }
+
// Return the entsize field.
uint64_t
entsize() const
set_addralign(uint64_t v)
{ this->addralign_ = v; }
+ void
+ checkpoint_set_addralign(uint64_t val)
+ {
+ if (this->checkpoint_ != NULL)
+ this->checkpoint_->set_addralign(val);
+ }
+
// Whether the output section index has been set.
bool
has_out_shndx() const
this->dynsym_index_ = index;
}
+ // Sort the attached input sections.
+ void
+ sort_attached_input_sections();
+
// Return whether the input sections sections attachd to this output
// section may require sorting. This is used to handle constructor
// priorities compatibly with GNU ld.
requires_postprocessing() const
{ return this->requires_postprocessing_; }
+ bool
+ is_unique_segment() const
+ { return this->is_unique_segment_; }
+
+ void
+ set_is_unique_segment()
+ { this->is_unique_segment_ = true; }
+
+ uint64_t extra_segment_flags() const
+ { return this->extra_segment_flags_; }
+
+ void
+ set_extra_segment_flags(uint64_t flags)
+ { this->extra_segment_flags_ = flags; }
+
+ uint64_t segment_alignment() const
+ { return this->segment_alignment_; }
+
+ void
+ set_segment_alignment(uint64_t align)
+ { this->segment_alignment_ = align; }
+
// If a section requires postprocessing, return the buffer to use.
unsigned char*
postprocessing_buffer() const
}
// For a relaxed input section.
- Input_section(Output_relaxed_input_section *psection)
+ Input_section(Output_relaxed_input_section* psection)
: shndx_(RELAXED_INPUT_SECTION_CODE), p2align_(0),
section_order_index_(0)
{
this->p2align_ = ffsll(static_cast<long long>(addralign));
}
}
-
+
+ // Return the current required size, without finalization.
+ off_t
+ current_data_size() const;
+
// Return the required size.
off_t
data_size() const;
// parameters.
bool
is_merge_section(bool is_string, uint64_t entsize,
- uint64_t addralign) const
+ uint64_t addralign) const
{
return (this->shndx_ == (is_string
? MERGE_STRING_SECTION_CODE
: MERGE_DATA_SECTION_CODE)
&& this->u1_.entsize == entsize
- && this->addralign() == addralign);
+ && this->addralign() == addralign);
}
// Return whether this is a merge section for some input section.
gold_assert(!this->is_input_section());
return this->u2_.posd;
}
-
+
// For a merge section, return the Output_merge_base pointer.
Output_merge_base*
output_merge_base() const
set_output_section(Output_section* os)
{
gold_assert(!this->is_input_section());
- Output_section_data *posd =
- this->is_relaxed_input_section() ? this->u2_.poris : this->u2_.posd;
+ Output_section_data* posd =
+ this->is_relaxed_input_section() ? this->u2_.poris : this->u2_.posd;
posd->set_output_section(os);
}
bool
output_offset(const Relobj* object, unsigned int shndx,
section_offset_type offset,
- section_offset_type *poutput) const;
-
- // Return whether this is the merge section for the input section
- // SHNDX in OBJECT.
- bool
- is_merge_section_for(const Relobj* object, unsigned int shndx) const;
+ section_offset_type* poutput) const;
// Write out the data. This does nothing for an input section.
void
set_current_data_size(off_t size)
{ this->set_current_data_size_for_child(size); }
- // Get the current size of the output section.
- off_t
- current_data_size() const
- { return this->current_data_size_for_child(); }
-
// End of linker script support.
// Save states before doing section layout.
// with index SHNDX. Return NULL if none is found.
const Output_relaxed_input_section*
find_relaxed_input_section(const Relobj* object, unsigned int shndx) const;
-
+
// Whether section offsets need adjustment due to relaxation.
bool
section_offsets_need_adjustment() const
set_section_offsets_need_adjustment()
{ this->section_offsets_need_adjustment_ = true; }
+ // Set section_offsets_need_adjustment to be false.
+ void
+ clear_section_offsets_need_adjustment()
+ { this->section_offsets_need_adjustment_ = false; }
+
// Adjust section offsets of input sections in this. This is
// requires if relaxation caused some input sections to change sizes.
void
void
print_merge_stats();
+ // Set a fixed layout for the section. Used for incremental update links.
+ void
+ set_fixed_layout(uint64_t sh_addr, off_t sh_offset, off_t sh_size,
+ uint64_t sh_addralign);
+
+ // Return TRUE if the section has a fixed layout.
+ bool
+ has_fixed_layout() const
+ { return this->has_fixed_layout_; }
+
+ // Set flag to allow patch space for this section. Used for full
+ // incremental links.
+ void
+ set_is_patch_space_allowed()
+ { this->is_patch_space_allowed_ = true; }
+
+ // Set a fill method to use for free space left in the output section
+ // during incremental links.
+ void
+ set_free_space_fill(Output_fill* free_space_fill)
+ {
+ this->free_space_fill_ = free_space_fill;
+ this->free_list_.set_min_hole_size(free_space_fill->minimum_hole_size());
+ }
+
+ // Reserve space within the fixed layout for the section. Used for
+ // incremental update links.
+ void
+ reserve(uint64_t sh_offset, uint64_t sh_size);
+
+ // Allocate space from the free list for the section. Used for
+ // incremental update links.
+ off_t
+ allocate(off_t len, uint64_t addralign);
+
+ typedef std::vector<Input_section> Input_section_list;
+
+ // Allow access to the input sections.
+ const Input_section_list&
+ input_sections() const
+ { return this->input_sections_; }
+
+ Input_section_list&
+ input_sections()
+ { return this->input_sections_; }
+
+ // For -r and --emit-relocs, we need to keep track of the associated
+ // relocation section.
+ Output_section*
+ reloc_section() const
+ { return this->reloc_section_; }
+
+ void
+ set_reloc_section(Output_section* os)
+ { this->reloc_section_ = os; }
+
protected:
// Return the output section--i.e., the object itself.
Output_section*
this->out_shndx_ = shndx;
}
+ // Update the data size 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 do a trial layout
+ // here.
+ virtual void
+ update_data_size();
+
// Set the final data size 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 their final addresses
void
write_to_postprocessing_buffer();
- typedef std::vector<Input_section> Input_section_list;
-
- // Allow a child class to access the input sections.
- const Input_section_list&
- input_sections() const
- { return this->input_sections_; }
-
// Whether this always keeps an input section list
bool
always_keeps_input_sections() const
addralign() const
{ return this->addralign_; }
+ void
+ set_addralign(uint64_t val)
+ { this->addralign_ = val; }
+
// Return the section flags.
elfcpp::Elf_Xword
flags() const
const Input_section_sort_entry&) const;
};
+ // This is the sort comparison function for .text to sort sections with
+ // prefixes .text.{unlikely,exit,startup,hot} before other sections.
+ struct Input_section_sort_section_prefix_special_ordering_compare
+ {
+ bool
+ operator()(const Input_section_sort_entry&,
+ const Input_section_sort_entry&) const;
+ };
+
+ // This is the sort comparison function for sorting sections by name.
+ struct Input_section_sort_section_name_compare
+ {
+ bool
+ operator()(const Input_section_sort_entry&,
+ const Input_section_sort_entry&) const;
+ };
+
// Fill data. This is used to fill in data between input sections.
// It is also used for data statements (BYTE, WORD, etc.) in linker
// scripts. When we have to keep track of the input sections, we
add_output_merge_section(Output_section_data* posd, bool is_string,
uint64_t entsize);
- // Sort the attached input sections.
- void
- sort_attached_input_sections();
-
// Find the merge section into which an input section with index SHNDX in
// OBJECT has been added. Return NULL if none found.
- Output_section_data*
+ const Output_section_data*
find_merge_section(const Relobj* object, unsigned int shndx) const;
// Build a relaxation map.
bool is_noload_ : 1;
// Whether this always keeps input section.
bool always_keeps_input_sections_ : 1;
+ // Whether this section has a fixed layout, for incremental update links.
+ bool has_fixed_layout_ : 1;
+ // True if we can add patch space to this section.
+ bool is_patch_space_allowed_ : 1;
+ // True if this output section goes into a unique segment.
+ bool is_unique_segment_ : 1;
// For SHT_TLS sections, the offset of this section relative to the base
// of the TLS segment.
uint64_t tls_offset_;
+ // Additional segment flags, specified via linker plugin, when mapping some
+ // input sections to unique segments.
+ uint64_t extra_segment_flags_;
+ // Segment alignment specified via linker plugin, when mapping some
+ // input sections to unique segments.
+ uint64_t segment_alignment_;
// Saved checkpoint.
Checkpoint_output_section* checkpoint_;
// Fast lookup maps for merged and relaxed input sections.
Output_section_lookup_maps* lookup_maps_;
+ // List of available regions within the section, for incremental
+ // update links.
+ Free_list free_list_;
+ // Method for filling chunks of free space.
+ Output_fill* free_space_fill_;
+ // Amount added as patch space for incremental linking.
+ off_t patch_space_;
+ // Associated relocation section, when emitting relocations.
+ Output_section* reloc_section_;
};
// An output segment. PT_LOAD segments are built from collections of
set_is_large_data_segment()
{ this->is_large_data_segment_ = true; }
+ bool
+ is_unique_segment() const
+ { return this->is_unique_segment_; }
+
+ // Mark segment as unique, happens when linker plugins request that
+ // certain input sections be mapped to unique segments.
+ void
+ set_is_unique_segment()
+ { this->is_unique_segment_ = true; }
+
// Return the maximum alignment of the Output_data.
uint64_t
maximum_alignment();
bool
has_dynamic_reloc() const;
+ // Return the first section.
+ Output_section*
+ first_section() const;
+
// Return the address of the first section.
uint64_t
- first_section_load_address() const;
+ first_section_load_address() const
+ {
+ const Output_section* os = this->first_section();
+ gold_assert(os != NULL);
+ return os->has_load_address() ? os->load_address() : os->address();
+ }
// Return whether the addresses have been set already.
bool
// address of the immediately following segment. Update *POFF and
// *PSHNDX. This should only be called for a PT_LOAD segment.
uint64_t
- set_section_addresses(const Layout*, bool reset, uint64_t addr,
- unsigned int increase_relro, off_t* poff,
- unsigned int* pshndx);
+ set_section_addresses(const Target*, Layout*, bool reset, uint64_t addr,
+ unsigned int* increase_relro, bool* has_relro,
+ off_t* poff, unsigned int* pshndx);
// Set the minimum alignment of this segment. This may be adjusted
// upward based on the section alignments.
this->min_p_align_ = align;
}
+ // Set the memory size of this segment.
+ void
+ set_size(uint64_t size)
+ {
+ this->memsz_ = size;
+ }
+
// Set the offset of this segment based on the section. This should
// only be called for a non-PT_LOAD segment.
void
// Set the section addresses in an Output_data_list.
uint64_t
- set_section_list_addresses(const Layout*, bool reset, Output_data_list*,
- uint64_t addr, off_t* poff, unsigned int* pshndx,
- bool* in_tls);
+ set_section_list_addresses(Layout*, bool reset, Output_data_list*,
+ uint64_t addr, off_t* poff, off_t* fpoff,
+ unsigned int* pshndx, bool* in_tls);
// Return the number of Output_sections in an Output_data_list.
unsigned int
// NOTE: We want to use the copy constructor. Currently, shallow copy
// works for us so we do not need to write our own copy constructor.
-
+
// The list of output data attached to this segment.
Output_data_list output_lists_[ORDER_MAX];
// The segment virtual address.
bool are_addresses_set_ : 1;
// Whether this segment holds large data sections.
bool is_large_data_segment_ : 1;
-};
-
-// This class represents the output file.
-
-class Output_file
-{
- public:
- Output_file(const char* name);
-
- // Indicate that this is a temporary file which should not be
- // output.
- void
- set_is_temporary()
- { this->is_temporary_ = true; }
-
- // Try to open an existing file. Returns false if the file doesn't
- // exist, has a size of 0 or can't be mmaped. This method is
- // thread-unsafe.
- bool
- open_for_modification();
-
- // Open the output file. FILE_SIZE is the final size of the file.
- // If the file already exists, it is deleted/truncated. This method
- // is thread-unsafe.
- void
- open(off_t file_size);
-
- // Resize the output file. This method is thread-unsafe.
- void
- resize(off_t file_size);
-
- // Close the output file (flushing all buffered data) and make sure
- // there are no errors. This method is thread-unsafe.
- void
- close();
-
- // Return the size of this file.
- off_t
- filesize()
- { return this->file_size_; }
-
- // Return the name of this file.
- const char*
- filename()
- { return this->name_; }
-
- // We currently always use mmap which makes the view handling quite
- // simple. In the future we may support other approaches.
-
- // Write data to the output file.
- void
- write(off_t offset, const void* data, size_t len)
- { memcpy(this->base_ + offset, data, len); }
-
- // Get a buffer to use to write to the file, given the offset into
- // the file and the size.
- unsigned char*
- get_output_view(off_t start, size_t size)
- {
- gold_assert(start >= 0
- && start + static_cast<off_t>(size) <= this->file_size_);
- return this->base_ + start;
- }
-
- // VIEW must have been returned by get_output_view. Write the
- // buffer to the file, passing in the offset and the size.
- void
- write_output_view(off_t, size_t, unsigned char*)
- { }
-
- // Get a read/write buffer. This is used when we want to write part
- // of the file, read it in, and write it again.
- unsigned char*
- get_input_output_view(off_t start, size_t size)
- { return this->get_output_view(start, size); }
-
- // Write a read/write buffer back to the file.
- void
- write_input_output_view(off_t, size_t, unsigned char*)
- { }
-
- // Get a read buffer. This is used when we just want to read part
- // of the file back it in.
- const unsigned char*
- get_input_view(off_t start, size_t size)
- { return this->get_output_view(start, size); }
-
- // Release a read bfufer.
- void
- free_input_view(off_t, size_t, const unsigned char*)
- { }
-
- private:
- // Map the file into memory or, if that fails, allocate anonymous
- // memory.
- void
- map();
-
- // Allocate anonymous memory for the file.
- bool
- map_anonymous();
-
- // Map the file into memory.
- bool
- map_no_anonymous();
-
- // Unmap the file from memory (and flush to disk buffers).
- void
- unmap();
-
- // File name.
- const char* name_;
- // File descriptor.
- int o_;
- // File size.
- off_t file_size_;
- // Base of file mapped into memory.
- unsigned char* base_;
- // True iff base_ points to a memory buffer rather than an output file.
- bool map_is_anonymous_;
- // True if this is a temporary file which should not be output.
- bool is_temporary_;
+ // Whether this was marked as a unique segment via a linker plugin.
+ bool is_unique_segment_ : 1;
};
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff