#include "workqueue.h"
#include "fileread.h"
#include "output.h"
+#include "archive.h"
namespace gold
{
-class Archive;
class Input_argument;
class Incremental_inputs_checker;
class Incremental_script_entry;
class Incremental_archive_entry;
class Incremental_inputs;
class Incremental_binary;
+class Incremental_library;
class Object;
+class Script_info;
// Incremental input type as stored in .gnu_incremental_inputs.
INCREMENTAL_INPUT_SCRIPT = 5
};
+// Incremental input file flags.
+// The input file type is stored in the lower eight bits.
+
+enum Incremental_input_flags
+{
+ INCREMENTAL_INPUT_IN_SYSTEM_DIR = 0x0800
+};
+
// Create an Incremental_binary object for FILE. Returns NULL is this is not
// possible, e.g. FILE is not an ELF file or has an unsupported target.
Incremental_binary*
open_incremental_binary(Output_file* file);
-// Code invoked early during an incremental link that checks what files need
-// to be relinked.
-
-class Incremental_checker
-{
- public:
- // Check if the file named OUTPUT_NAME can be linked incrementally.
- // INCREMENTAL_INPUTS must have the canonical form of the command line
- // and input arguments filled - at this point of linking other fields are
- // probably not filled yet. TODO: for inputs that don't need to be
- // rebuilt, this function should fill the incremental input information.
- Incremental_checker(const char* output_name,
- Incremental_inputs* incremental_inputs)
- : output_name_(output_name), incremental_inputs_(incremental_inputs)
- { }
-
- // Analyzes the output file to check if incremental linking is possible and
- // what files needs to be relinked.
- bool
- can_incrementally_link_output_file();
-
- private:
- // Name of the output file to analyze.
- const char* output_name_;
-
- // The Incremental_inputs object. At this stage of link, only the command
- // line and inputs are filled.
- Incremental_inputs* incremental_inputs_;
-};
-
// Base class for recording each input file.
class Incremental_input_entry
{
public:
- Incremental_input_entry(Stringpool::Key filename_key, Timespec mtime)
- : filename_key_(filename_key), offset_(0), info_offset_(0), mtime_(mtime)
+ Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial,
+ Timespec mtime)
+ : filename_key_(filename_key), offset_(0), info_offset_(0),
+ arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false)
{ }
virtual
get_filename_key() const
{ return this->filename_key_; }
+ // Get the serial number of the input file.
+ unsigned int
+ arg_serial() const
+ { return this->arg_serial_; }
+
// Get the modification time of the input file.
const Timespec&
get_mtime() const
{ return this->mtime_; }
+ // Record that the file was found in a system directory.
+ void
+ set_is_in_system_directory()
+ { this->is_in_system_directory_ = true; }
+
+ // Return TRUE if the file was found in a system directory.
+ bool
+ is_in_system_directory() const
+ { return this->is_in_system_directory_; }
+
// Return a pointer to the derived Incremental_script_entry object.
// Return NULL for input entries that are not script files.
Incremental_script_entry*
// Offset of the extra information in the output section.
unsigned int info_offset_;
+ // Serial number of the file in the argument list.
+ unsigned int arg_serial_;
+
// Last modification time of the file.
Timespec mtime_;
+
+ // TRUE if the file was found in a system directory.
+ bool is_in_system_directory_;
+};
+
+// Information about a script input that will persist during the whole linker
+// run. Needed only during an incremental build to retrieve the input files
+// added by this script.
+
+class Script_info
+{
+ public:
+ Script_info(const std::string& filename)
+ : filename_(filename), incremental_script_entry_(NULL)
+ { }
+
+ // Store a pointer to the incremental information for this script.
+ void
+ set_incremental_info(Incremental_script_entry* entry)
+ { this->incremental_script_entry_ = entry; }
+
+ // Return the filename.
+ const std::string&
+ filename() const
+ { return this->filename_; }
+
+ // Return the pointer to the incremental information for this script.
+ Incremental_script_entry*
+ incremental_info() const
+ { return this->incremental_script_entry_; }
+
+ private:
+ const std::string filename_;
+ Incremental_script_entry* incremental_script_entry_;
};
// Class for recording input scripts.
class Incremental_script_entry : public Incremental_input_entry
{
public:
- Incremental_script_entry(Stringpool::Key filename_key, Script_info* script,
+ Incremental_script_entry(Stringpool::Key filename_key,
+ unsigned int arg_serial, Script_info* script,
Timespec mtime)
- : Incremental_input_entry(filename_key, mtime), script_(script), objects_()
+ : Incremental_input_entry(filename_key, arg_serial, mtime),
+ script_(script), objects_()
{ }
// Add a member object to the archive.
{
public:
Incremental_object_entry(Stringpool::Key filename_key, Object* obj,
- Timespec mtime)
- : Incremental_input_entry(filename_key, mtime), obj_(obj),
+ unsigned int arg_serial, Timespec mtime)
+ : Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj),
is_member_(false), sections_()
{
if (!obj_->is_dynamic())
// Add an input section.
void
add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size)
- {
- if (shndx >= this->sections_.size())
- this->sections_.resize(shndx + 1);
- this->sections_[shndx].name_key = name_key;
- this->sections_[shndx].sh_size = sh_size;
- }
+ { this->sections_.push_back(Input_section(shndx, name_key, sh_size)); }
// Return the number of input sections in this object.
unsigned int
get_input_section_count() const
{ return this->sections_.size(); }
+ // Return the input section index for the Nth input section.
+ Stringpool::Key
+ get_input_section_index(unsigned int n) const
+ { return this->sections_[n].shndx_; }
+
// Return the stringpool key of the Nth input section.
Stringpool::Key
get_input_section_name_key(unsigned int n) const
- { return this->sections_[n].name_key; }
+ { return this->sections_[n].name_key_; }
// Return the size of the Nth input section.
off_t
get_input_section_size(unsigned int n) const
- { return this->sections_[n].sh_size; }
+ { return this->sections_[n].sh_size_; }
protected:
virtual Incremental_input_type
// Input sections.
struct Input_section
{
- Stringpool::Key name_key;
- off_t sh_size;
+ Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size)
+ : shndx_(shndx), name_key_(name_key), sh_size_(sh_size)
+ { }
+ unsigned int shndx_;
+ Stringpool::Key name_key_;
+ off_t sh_size_;
};
std::vector<Input_section> sections_;
};
class Incremental_archive_entry : public Incremental_input_entry
{
public:
- Incremental_archive_entry(Stringpool::Key filename_key, Timespec mtime)
- : Incremental_input_entry(filename_key, mtime), members_(), unused_syms_()
+ Incremental_archive_entry(Stringpool::Key filename_key,
+ unsigned int arg_serial, Timespec mtime)
+ : Incremental_input_entry(filename_key, arg_serial, mtime), members_(),
+ unused_syms_()
{ }
// Add a member object to the archive.
// Record the initial info for archive file ARCHIVE.
void
- report_archive_begin(Library_base* arch, Script_info* script_info);
+ report_archive_begin(Library_base* arch, unsigned int arg_serial,
+ Script_info* script_info);
// Record the final info for archive file ARCHIVE.
void
// Record the info for object file OBJ. If ARCH is not NULL,
// attach the object file to the archive.
void
- report_object(Object* obj, Library_base* arch, Script_info* script_info);
+ report_object(Object* obj, unsigned int arg_serial, Library_base* arch,
+ Script_info* script_info);
// Record an input section belonging to object file OBJ.
void
// Record the info for input script SCRIPT.
void
- report_script(const std::string& filename, Script_info* script,
+ report_script(Script_info* script, unsigned int arg_serial,
Timespec mtime);
// Return the running count of incremental relocations.
unsigned int reloc_count_;
};
+// Reader class for global symbol info from an object file entry in
+// the .gnu_incremental_inputs section.
+
+template<bool big_endian>
+class Incremental_global_symbol_reader
+{
+ private:
+ typedef elfcpp::Swap<32, big_endian> Swap32;
+
+ public:
+ Incremental_global_symbol_reader(const unsigned char* p)
+ : p_(p)
+ { }
+
+ unsigned int
+ output_symndx() const
+ { return Swap32::readval(this->p_); }
+
+ unsigned int
+ shndx() const
+ { return Swap32::readval(this->p_ + 4); }
+
+ unsigned int
+ next_offset() const
+ { return Swap32::readval(this->p_ + 8); }
+
+ unsigned int
+ reloc_count() const
+ { return Swap32::readval(this->p_ + 12); }
+
+ unsigned int
+ reloc_offset() const
+ { return Swap32::readval(this->p_ + 16); }
+
+ private:
+ // Base address of the symbol entry.
+ const unsigned char* p_;
+};
+
// Reader class for .gnu_incremental_inputs section.
template<int size, bool big_endian>
: inputs_(inputs), offset_(offset)
{
this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4);
- int type = Swap16::readval(this->inputs_->p_ + offset + 20);
- this->type_ = static_cast<Incremental_input_type>(type);
+ this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20);
}
// Return the filename.
return this->inputs_->get_string(offset);
}
+ // Return the argument serial number.
+ unsigned int
+ arg_serial() const
+ {
+ return Swap16::readval(this->inputs_->p_ + this->offset_ + 22);
+ }
+
// Return the timestamp.
Timespec
get_mtime() const
// Return the type of input file.
Incremental_input_type
type() const
- { return this->type_; }
+ { return static_cast<Incremental_input_type>(this->flags_ & 0xff); }
+
+ // Return TRUE if the file was found in a system directory.
+ bool
+ is_in_system_directory() const
+ { return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; }
// Return the input section count -- for objects only.
unsigned int
get_input_section_count() const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_OBJECT
- || this->type_ == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
+ gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
+ || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
unsigned int
get_symbol_offset(unsigned int symndx) const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_OBJECT
- || this->type_ == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
+ gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
+ || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
unsigned int section_count = this->get_input_section_count();
return (this->info_offset_ + 8
+ section_count * input_section_entry_size
- + symndx * 16);
+ + symndx * 20);
}
// Return the global symbol count -- for objects & shared libraries only.
unsigned int
get_global_symbol_count() const
{
- switch (this->type_)
+ switch (this->type())
{
case INCREMENTAL_INPUT_OBJECT:
case INCREMENTAL_INPUT_ARCHIVE_MEMBER:
unsigned int
get_object_count() const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_SCRIPT);
+ gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
unsigned int
get_object_offset(unsigned int n) const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_SCRIPT);
+ gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT);
return Swap32::readval(this->inputs_->p_ + this->info_offset_
+ 4 + n * 4);
}
unsigned int
get_member_count() const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE);
+ gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_);
}
unsigned int
get_unused_symbol_count() const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE);
+ gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4);
}
unsigned int
get_member_offset(unsigned int n) const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE);
+ gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
return Swap32::readval(this->inputs_->p_ + this->info_offset_
+ 8 + n * 4);
}
const char*
get_unused_symbol(unsigned int n) const
{
- gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE);
+ gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE);
unsigned int member_count = this->get_member_count();
unsigned int offset = Swap32::readval(this->inputs_->p_
+ this->info_offset_ + 8
return info;
}
- // Information about a global symbol.
- struct Global_symbol_info
- {
- unsigned int output_symndx;
- unsigned int next_offset;
- unsigned int reloc_count;
- unsigned int reloc_offset;
- };
-
// Return info about the Nth global symbol -- for objects only.
- Global_symbol_info
- get_global_symbol_info(unsigned int n) const
+ Incremental_global_symbol_reader<big_endian>
+ get_global_symbol_reader(unsigned int n) const
{
- Global_symbol_info info;
+ gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT
+ || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER);
unsigned int section_count = this->get_input_section_count();
const unsigned char* p = (this->inputs_->p_
+ this->info_offset_ + 8
+ section_count * input_section_entry_size
- + n * 16);
- info.output_symndx = Swap32::readval(p);
- info.next_offset = Swap32::readval(p + 4);
- info.reloc_count = Swap::readval(p + 8);
- info.reloc_offset = Swap::readval(p + 12);
- return info;
+ + n * 20);
+ return Incremental_global_symbol_reader<big_endian>(p);
+ }
+
+ // Return the output symbol index for the Nth global symbol -- for shared
+ // libraries only. Sets *IS_DEF to TRUE if the symbol is defined in this
+ // input file.
+ unsigned int
+ get_output_symbol_index(unsigned int n, bool* is_def)
+ {
+ gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY);
+ const unsigned char* p = (this->inputs_->p_
+ + this->info_offset_ + 4
+ + n * 4);
+ unsigned int output_symndx = Swap32::readval(p);
+ *is_def = (output_symndx & (1U << 31)) != 0;
+ return output_symndx & ((1U << 31) - 1);
}
private:
static const unsigned int input_section_entry_size = 8 + 2 * size / 8;
// The reader instance for the containing section.
const Incremental_inputs_reader* inputs_;
- // The type of input file.
- Incremental_input_type type_;
+ // The flags, including the type of input file.
+ unsigned int flags_;
// Section offset to the input file entry.
unsigned int offset_;
// Section offset to the supplemental info for the input file.
unsigned int info_offset_;
};
+ // Return the offset of an input file entry given its index N.
+ unsigned int
+ input_file_offset(unsigned int n) const
+ {
+ gold_assert(n < this->input_file_count_);
+ return 16 + n * 24;
+ }
+
+ // Return the index of an input file entry given its OFFSET.
+ unsigned int
+ input_file_index(unsigned int offset) const
+ {
+ int n = (offset - 16) / 24;
+ gold_assert(input_file_offset(n) == offset);
+ return n;
+ }
+
// Return a reader for the Nth input file entry.
Incremental_input_entry_reader
input_file(unsigned int n) const
+ { return Incremental_input_entry_reader(this, this->input_file_offset(n)); }
+
+ // Return a reader for the input file entry at OFFSET.
+ Incremental_input_entry_reader
+ input_file_at_offset(unsigned int offset) const
{
- gold_assert(n < this->input_file_count_);
- Incremental_input_entry_reader input(this, 16 + n * 24);
- return input;
+ gold_assert(offset < 16 + this->input_file_count_ * 24);
+ return Incremental_input_entry_reader(this, offset);
}
private:
// Return the relocation type for relocation entry at offset OFF.
unsigned int
get_r_type(unsigned int off) const
- {
- return elfcpp::Swap<32, big_endian>::readval(this->p_ + off);
- }
+ { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); }
// Return the output section index for relocation entry at offset OFF.
unsigned int
get_r_shndx(unsigned int off) const
- {
- return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4);
- }
+ { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); }
// Return the output section offset for relocation entry at offset OFF.
Address
get_r_offset(unsigned int off) const
- {
- return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8);
- }
+ { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); }
// Return the addend for relocation entry at offset OFF.
Addend
+ this->field_size);
}
+ // Return a pointer to the relocation entry at offset OFF.
+ const unsigned char*
+ data(unsigned int off) const
+ { return this->p_ + off; }
+
private:
// Base address of the .gnu_incremental_relocs section.
const unsigned char* p_;
{
public:
Incremental_binary(Output_file* output, Target* target)
- : output_(output), target_(target)
+ : input_args_map_(), library_map_(), script_map_(),
+ output_(output), target_(target)
{ }
virtual
// Check the .gnu_incremental_inputs section to see whether an incremental
// build is possible.
bool
- check_inputs(Incremental_inputs* incremental_inputs)
- { return this->do_check_inputs(incremental_inputs); }
-
- // Return TRUE if the file specified by INPUT_ARGUMENT is unchanged
- // with respect to the base file.
- bool
- file_is_unchanged(const Input_argument* input_argument) const
- { return this->do_file_is_unchanged(input_argument); }
+ check_inputs(const Command_line& cmdline,
+ Incremental_inputs* incremental_inputs)
+ { return this->do_check_inputs(cmdline, incremental_inputs); }
// Report an error.
void
error(const char* format, ...) const ATTRIBUTE_PRINTF_2;
- // Wrapper class for a sized Incremental_input_entry_reader.
-
+ // Proxy class for a sized Incremental_input_entry_reader.
+
class Input_reader
{
public:
type() const
{ return this->do_type(); }
+ unsigned int
+ arg_serial() const
+ { return this->do_arg_serial(); }
+
+ unsigned int
+ get_unused_symbol_count() const
+ { return this->do_get_unused_symbol_count(); }
+
+ const char*
+ get_unused_symbol(unsigned int n) const
+ { return this->do_get_unused_symbol(n); }
+
protected:
virtual const char*
do_filename() const = 0;
virtual Incremental_input_type
do_type() const = 0;
+
+ virtual unsigned int
+ do_arg_serial() const = 0;
+
+ virtual unsigned int
+ do_get_unused_symbol_count() const = 0;
+
+ virtual const char*
+ do_get_unused_symbol(unsigned int n) const = 0;
};
- Input_reader*
- get_input_reader(const char* filename)
- { return this->do_get_input_reader(filename); }
+ // Return the number of input files.
+ unsigned int
+ input_file_count() const
+ { return this->do_input_file_count(); }
+
+ // Return an Input_reader for input file N.
+ const Input_reader*
+ get_input_reader(unsigned int n) const
+ { return this->do_get_input_reader(n); }
+
+ // Return TRUE if the input file N has changed since the last link.
+ bool
+ file_has_changed(unsigned int n) const
+ { return this->do_file_has_changed(n); }
+
+ // Return the Input_argument for input file N. Returns NULL if
+ // the Input_argument is not available.
+ const Input_argument*
+ get_input_argument(unsigned int n) const
+ {
+ const Input_reader* input_file = this->do_get_input_reader(n);
+ unsigned int arg_serial = input_file->arg_serial();
+ if (arg_serial == 0 || arg_serial > this->input_args_map_.size())
+ return NULL;
+ return this->input_args_map_[arg_serial - 1];
+ }
+
+ // Return an Incremental_library for the given input file.
+ Incremental_library*
+ get_library(unsigned int n)
+ { return this->library_map_[n]; }
+
+ // Return a Script_info for the given input file.
+ Script_info*
+ get_script_info(unsigned int n)
+ { return this->script_map_[n]; }
+
+ // Initialize the layout of the output file based on the existing
+ // output file.
+ void
+ init_layout(Layout* layout)
+ { this->do_init_layout(layout); }
+
+ // Mark regions of the input file that must be kept unchanged.
+ void
+ reserve_layout(unsigned int input_file_index)
+ { this->do_reserve_layout(input_file_index); }
// Functions and types for the elfcpp::Elf_file interface. This
// permit us to use Incremental_binary as the File template parameter for
view(Location loc)
{ return View(this->view(loc.file_offset, loc.data_size)); }
+ // Return the Output_file.
+ Output_file*
+ output_file()
+ { return this->output_; }
+
protected:
// Check the .gnu_incremental_inputs section to see whether an incremental
// build is possible.
virtual bool
- do_check_inputs(Incremental_inputs* incremental_inputs) = 0;
+ do_check_inputs(const Command_line& cmdline,
+ Incremental_inputs* incremental_inputs) = 0;
- // Return TRUE if the file specified by INPUT_ARGUMENT is unchanged
- // with respect to the base file.
+ // Return TRUE if input file N has changed since the last incremental link.
virtual bool
- do_file_is_unchanged(const Input_argument* input_argument) const = 0;
+ do_file_has_changed(unsigned int n) const = 0;
+
+ // Initialize the layout of the output file based on the existing
+ // output file.
+ virtual void
+ do_init_layout(Layout* layout) = 0;
+
+ // Mark regions of the input file that must be kept unchanged.
+ virtual void
+ do_reserve_layout(unsigned int input_file_index) = 0;
+
+ virtual unsigned int
+ do_input_file_count() const = 0;
- virtual Input_reader*
- do_get_input_reader(const char* filename) = 0;
+ virtual const Input_reader*
+ do_get_input_reader(unsigned int) const = 0;
+
+ // Map from input file index to Input_argument.
+ std::vector<const Input_argument*> input_args_map_;
+ // Map from an input file index to an Incremental_library.
+ std::vector<Incremental_library*> library_map_;
+ // Map from an input file index to a Script_info.
+ std::vector<Script_info*> script_map_;
private:
// Edited output file object.
const elfcpp::Ehdr<size, big_endian>& ehdr,
Target* target)
: Incremental_binary(output, target), elf_file_(this, ehdr),
- has_incremental_info_(false), inputs_reader_(), symtab_reader_(),
- relocs_reader_(), got_plt_reader_(), current_input_file_(0)
+ section_map_(), has_incremental_info_(false), inputs_reader_(),
+ symtab_reader_(), relocs_reader_(), got_plt_reader_(),
+ input_entry_readers_()
{ this->setup_readers(); }
// Returns TRUE if the file contains incremental info.
has_incremental_info() const
{ return this->has_incremental_info_; }
+ // Return the Output_section for section index SHNDX.
+ Output_section*
+ output_section(unsigned int shndx)
+ { return this->section_map_[shndx]; }
+
// Readers for the incremental info sections.
- Incremental_inputs_reader<size, big_endian>
+ const Incremental_inputs_reader<size, big_endian>&
inputs_reader() const
{ return this->inputs_reader_; }
- Incremental_symtab_reader<big_endian>
+ const Incremental_symtab_reader<big_endian>&
symtab_reader() const
{ return this->symtab_reader_; }
- Incremental_relocs_reader<size, big_endian>
+ const Incremental_relocs_reader<size, big_endian>&
relocs_reader() const
{ return this->relocs_reader_; }
- Incremental_got_plt_reader<big_endian>
+ const Incremental_got_plt_reader<big_endian>&
got_plt_reader() const
{ return this->got_plt_reader_; }
+ void
+ get_symtab_view(View* symtab_view, unsigned int* sym_count,
+ elfcpp::Elf_strtab* strtab);
+
protected:
+ typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
+ typedef typename Inputs_reader::Incremental_input_entry_reader
+ Input_entry_reader;
+
virtual bool
- do_check_inputs(Incremental_inputs* incremental_inputs);
+ do_check_inputs(const Command_line& cmdline,
+ Incremental_inputs* incremental_inputs);
- // Return TRUE if the file specified by INPUT_ARGUMENT is unchanged
- // with respect to the base file.
+ // Return TRUE if input file N has changed since the last incremental link.
virtual bool
- do_file_is_unchanged(const Input_argument* input_argument) const;
+ do_file_has_changed(unsigned int n) const;
+
+ // Initialize the layout of the output file based on the existing
+ // output file.
+ virtual void
+ do_init_layout(Layout* layout);
+
+ // Mark regions of the input file that must be kept unchanged.
+ virtual void
+ do_reserve_layout(unsigned int input_file_index);
+
+ // Proxy class for a sized Incremental_input_entry_reader.
- // Wrapper class for a sized Incremental_input_entry_reader.
-
class Sized_input_reader : public Input_reader
{
public:
- typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
- typedef typename Inputs_reader::Incremental_input_entry_reader
- Input_entry_reader;
-
Sized_input_reader(Input_entry_reader r)
: Input_reader(), reader_(r)
{ }
do_type() const
{ return this->reader_.type(); }
+ unsigned int
+ do_arg_serial() const
+ { return this->reader_.arg_serial(); }
+
+ unsigned int
+ do_get_unused_symbol_count() const
+ { return this->reader_.get_unused_symbol_count(); }
+
+ const char*
+ do_get_unused_symbol(unsigned int n) const
+ { return this->reader_.get_unused_symbol(n); }
+
Input_entry_reader reader_;
};
- virtual Input_reader*
- do_get_input_reader(const char* filename);
+ virtual unsigned int
+ do_input_file_count() const
+ { return this->inputs_reader_.input_file_count(); }
+
+ virtual const Input_reader*
+ do_get_input_reader(unsigned int n) const
+ {
+ gold_assert(n < this->input_entry_readers_.size());
+ return &this->input_entry_readers_[n];
+ }
private:
bool
// Output as an ELF file.
elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_;
+ // Map section index to an Output_section in the updated layout.
+ std::vector<Output_section*> section_map_;
+
// Readers for the incremental info sections.
bool has_incremental_info_;
Incremental_inputs_reader<size, big_endian> inputs_reader_;
Incremental_symtab_reader<big_endian> symtab_reader_;
Incremental_relocs_reader<size, big_endian> relocs_reader_;
Incremental_got_plt_reader<big_endian> got_plt_reader_;
+ std::vector<Sized_input_reader> input_entry_readers_;
+};
+
+// An incremental Relobj. This class represents a relocatable object
+// that has not changed since the last incremental link, and whose contents
+// can be used directly from the base file.
+
+template<int size, bool big_endian>
+class Sized_incr_relobj : public Sized_relobj_base<size, big_endian>
+{
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+ typedef typename Sized_relobj_base<size, big_endian>::Symbols Symbols;
+
+ static const Address invalid_address = static_cast<Address>(0) - 1;
+
+ Sized_incr_relobj(const std::string& name,
+ Sized_incremental_binary<size, big_endian>* ibase,
+ unsigned int input_file_index);
+
+ // Checks if the offset of input section SHNDX within its output
+ // section is invalid.
+ bool
+ is_output_section_offset_invalid(unsigned int shndx) const
+ { return this->section_offsets_[shndx] == invalid_address; }
+
+ // Get the offset of input section SHNDX within its output section.
+ // This is -1 if the input section requires a special mapping, such
+ // as a merge section. The output section can be found in the
+ // output_sections_ field of the parent class Incrobj.
+ uint64_t
+ do_output_section_offset(unsigned int shndx) const
+ {
+ gold_assert(shndx < this->section_offsets_.size());
+ Address off = this->section_offsets_[shndx];
+ if (off == invalid_address)
+ return -1ULL;
+ return off;
+ }
+
+ private:
+ typedef typename Sized_relobj_base<size, big_endian>::Output_sections
+ Output_sections;
+ typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
+ typedef typename Inputs_reader::Incremental_input_entry_reader
+ Input_entry_reader;
+
+ // Return TRUE if this is an incremental (unchanged) input file.
+ bool
+ do_is_incremental() const
+ { return true; }
+
+ // Return the last modified time of the file.
+ Timespec
+ do_get_mtime()
+ { return this->input_reader_.get_mtime(); }
+
+ // Read the symbols.
+ void
+ do_read_symbols(Read_symbols_data*);
+
+ // Lay out the input sections.
+ void
+ do_layout(Symbol_table*, Layout*, Read_symbols_data*);
+
+ // Layout sections whose layout was deferred while waiting for
+ // input files from a plugin.
+ void
+ do_layout_deferred_sections(Layout*);
+
+ // Add the symbols to the symbol table.
+ void
+ do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*);
+
+ Archive::Should_include
+ do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*,
+ std::string* why);
+
+ // Iterate over global symbols, calling a visitor class V for each.
+ void
+ do_for_all_global_symbols(Read_symbols_data* sd,
+ Library_base::Symbol_visitor_base* v);
+
+ // Iterate over local symbols, calling a visitor class V for each GOT offset
+ // associated with a local symbol.
+ void
+ do_for_all_local_got_entries(Got_offset_list::Visitor* v) const;
+
+ // Get the size of a section.
+ uint64_t
+ do_section_size(unsigned int shndx);
+
+ // Get the name of a section.
+ std::string
+ do_section_name(unsigned int shndx);
+
+ // Return a view of the contents of a section.
+ Object::Location
+ do_section_contents(unsigned int shndx);
+
+ // Return section flags.
+ uint64_t
+ do_section_flags(unsigned int shndx);
+
+ // Return section entsize.
+ uint64_t
+ do_section_entsize(unsigned int shndx);
+
+ // Return section address.
+ uint64_t
+ do_section_address(unsigned int shndx);
+
+ // Return section type.
+ unsigned int
+ do_section_type(unsigned int shndx);
+
+ // Return the section link field.
+ unsigned int
+ do_section_link(unsigned int shndx);
+
+ // Return the section link field.
+ unsigned int
+ do_section_info(unsigned int shndx);
- // Index of the current input file entry.
- int current_input_file_;
+ // Return the section alignment.
+ uint64_t
+ do_section_addralign(unsigned int shndx);
+
+ // Return the Xindex structure to use.
+ Xindex*
+ do_initialize_xindex();
+
+ // Get symbol counts.
+ void
+ do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const;
+
+ // Get global symbols.
+ const Symbols*
+ do_get_global_symbols() const
+ { return &this->symbols_; }
+
+ // Return the number of local symbols.
+ unsigned int
+ do_local_symbol_count() const
+ { return 0; }
+
+ // Read the relocs.
+ void
+ do_read_relocs(Read_relocs_data*);
+
+ // Process the relocs to find list of referenced sections. Used only
+ // during garbage collection.
+ void
+ do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*);
+
+ // Scan the relocs and adjust the symbol table.
+ void
+ do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*);
+
+ // Count the local symbols.
+ void
+ do_count_local_symbols(Stringpool_template<char>*,
+ Stringpool_template<char>*);
+
+ // Finalize the local symbols.
+ unsigned int
+ do_finalize_local_symbols(unsigned int, off_t, Symbol_table*);
+
+ // Set the offset where local dynamic symbol information will be stored.
+ unsigned int
+ do_set_local_dynsym_indexes(unsigned int);
+
+ // Set the offset where local dynamic symbol information will be stored.
+ unsigned int
+ do_set_local_dynsym_offset(off_t);
+
+ // Relocate the input sections and write out the local symbols.
+ void
+ do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of);
+
+ // Set the offset of a section.
+ void
+ do_set_section_offset(unsigned int shndx, uint64_t off);
+
+ // The Incremental_binary base file.
+ Sized_incremental_binary<size, big_endian>* ibase_;
+ // The index of the object in the input file list.
+ unsigned int input_file_index_;
+ // The reader for the input file.
+ Input_entry_reader input_reader_;
+ // The entries in the symbol table for the external symbols.
+ Symbols symbols_;
+ // For each input section, the offset of the input section in its
+ // output section. This is INVALID_ADDRESS if the input section requires a
+ // special mapping.
+ std::vector<Address> section_offsets_;
+ // The offset of the first incremental relocation for this object.
+ unsigned int incr_reloc_offset_;
+ // The number of incremental relocations for this object.
+ unsigned int incr_reloc_count_;
+ // The index of the first incremental relocation for this object in the
+ // updated output file.
+ unsigned int incr_reloc_output_index_;
+ // A copy of the incremental relocations from this object.
+ unsigned char* incr_relocs_;
+};
+
+// An incremental Dynobj. This class represents a shared object that has
+// not changed since the last incremental link, and whose contents can be
+// used directly from the base file.
+
+template<int size, bool big_endian>
+class Sized_incr_dynobj : public Dynobj
+{
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+
+ static const Address invalid_address = static_cast<Address>(0) - 1;
+
+ Sized_incr_dynobj(const std::string& name,
+ Sized_incremental_binary<size, big_endian>* ibase,
+ unsigned int input_file_index);
+
+ private:
+ typedef Incremental_inputs_reader<size, big_endian> Inputs_reader;
+ typedef typename Inputs_reader::Incremental_input_entry_reader
+ Input_entry_reader;
+
+ // Return TRUE if this is an incremental (unchanged) input file.
+ bool
+ do_is_incremental() const
+ { return true; }
+
+ // Return the last modified time of the file.
+ Timespec
+ do_get_mtime()
+ { return this->input_reader_.get_mtime(); }
+
+ // Read the symbols.
+ void
+ do_read_symbols(Read_symbols_data*);
+
+ // Lay out the input sections.
+ void
+ do_layout(Symbol_table*, Layout*, Read_symbols_data*);
+
+ // Add the symbols to the symbol table.
+ void
+ do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*);
+
+ Archive::Should_include
+ do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*,
+ std::string* why);
+
+ // Iterate over global symbols, calling a visitor class V for each.
+ void
+ do_for_all_global_symbols(Read_symbols_data* sd,
+ Library_base::Symbol_visitor_base* v);
+
+ // Iterate over local symbols, calling a visitor class V for each GOT offset
+ // associated with a local symbol.
+ void
+ do_for_all_local_got_entries(Got_offset_list::Visitor* v) const;
+
+ // Get the size of a section.
+ uint64_t
+ do_section_size(unsigned int shndx);
+
+ // Get the name of a section.
+ std::string
+ do_section_name(unsigned int shndx);
+
+ // Return a view of the contents of a section.
+ Object::Location
+ do_section_contents(unsigned int shndx);
+
+ // Return section flags.
+ uint64_t
+ do_section_flags(unsigned int shndx);
+
+ // Return section entsize.
+ uint64_t
+ do_section_entsize(unsigned int shndx);
+
+ // Return section address.
+ uint64_t
+ do_section_address(unsigned int shndx);
+
+ // Return section type.
+ unsigned int
+ do_section_type(unsigned int shndx);
+
+ // Return the section link field.
+ unsigned int
+ do_section_link(unsigned int shndx);
+
+ // Return the section link field.
+ unsigned int
+ do_section_info(unsigned int shndx);
+
+ // Return the section alignment.
+ uint64_t
+ do_section_addralign(unsigned int shndx);
+
+ // Return the Xindex structure to use.
+ Xindex*
+ do_initialize_xindex();
+
+ // Get symbol counts.
+ void
+ do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const;
+
+ // Get global symbols.
+ const Symbols*
+ do_get_global_symbols() const
+ { return &this->symbols_; }
+
+ // The Incremental_binary base file.
+ Sized_incremental_binary<size, big_endian>* ibase_;
+ // The index of the object in the input file list.
+ unsigned int input_file_index_;
+ // The reader for the input file.
+ Input_entry_reader input_reader_;
+ // The entries in the symbol table for the external symbols.
+ Symbols symbols_;
+};
+
+// Allocate an incremental object of the appropriate size and endianness.
+extern Object*
+make_sized_incremental_object(
+ Incremental_binary* base,
+ unsigned int input_file_index,
+ Incremental_input_type input_type,
+ const Incremental_binary::Input_reader* input_reader);
+
+// This class represents an Archive library (or --start-lib/--end-lib group)
+// that has not changed since the last incremental link. Its contents come
+// from the incremental inputs entry in the base file.
+
+class Incremental_library : public Library_base
+{
+ public:
+ Incremental_library(const char* filename, unsigned int input_file_index,
+ const Incremental_binary::Input_reader* input_reader)
+ : Library_base(NULL), filename_(filename),
+ input_file_index_(input_file_index), input_reader_(input_reader),
+ unused_symbols_(), is_reported_(false)
+ { }
+
+ // Return the input file index.
+ unsigned int
+ input_file_index() const
+ { return this->input_file_index_; }
+
+ // Return the serial number of the input file.
+ unsigned int
+ arg_serial() const
+ { return this->input_reader_->arg_serial(); }
+
+ // Copy the unused symbols from the incremental input info.
+ // We need to do this because we may be overwriting the incremental
+ // input info in the base file before we write the new incremental
+ // info.
+ void
+ copy_unused_symbols();
+
+ // Return FALSE on the first call to indicate that the library needs
+ // to be recorded; return TRUE subsequently.
+ bool
+ is_reported()
+ {
+ bool was_reported = this->is_reported_;
+ is_reported_ = true;
+ return was_reported;
+ }
+
+ private:
+ typedef std::vector<std::string> Symbol_list;
+
+ // The file name.
+ const std::string&
+ do_filename() const
+ { return this->filename_; }
+
+ // Return the modification time of the archive file.
+ Timespec
+ do_get_mtime()
+ { return this->input_reader_->get_mtime(); }
+
+ // Iterator for unused global symbols in the library.
+ void
+ do_for_all_unused_symbols(Symbol_visitor_base* v) const;
+
+ // The name of the library.
+ std::string filename_;
+ // The input file index of this library.
+ unsigned int input_file_index_;
+ // A reader for the incremental input information.
+ const Incremental_binary::Input_reader* input_reader_;
+ // List of unused symbols defined in this library.
+ Symbol_list unused_symbols_;
+ // TRUE when this library has been reported to the new incremental info.
+ bool is_reported_;
};
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff