RetroLinker
Linker for several 8-bit, 16-bit and 32-bit formats
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Classes | Public Member Functions | Public Attributes | Protected Member Functions | List of all members
Microsoft::PEFormat Class Reference

Microsoft PE .EXE portable executable file format. More...

#include <peexe.h>

Inheritance diagram for Microsoft::PEFormat:
COFF::COFFFormat Linker::InputFormat Linker::SegmentManager Linker::Format Linker::OutputFormat Linker::Image Linker::Format Linker::Image

Classes

class  PEOptionalHeader
 

Public Member Functions

void ReadFile (Linker::Reader &rd) override
 Loads file into memory.
 
void CalculateValues () override
 Intermediate step between processing module and generating output file to set up headers and management sections It is expected that after a module is processed, additional steps are required to evaluate the final values of the fields.
 
offset_t WriteFile (Linker::Writer &wr) const override
 Stores data in memory to file.
 
void Dump (Dumper::Dumper &dump) const override
 Display file contents in a nice manner.
 
std::string GetDefaultExtension (Linker::Module &module, std::string filename) const override
 Appends a default extension to the filename.
 
- Public Member Functions inherited from COFF::COFFFormat
::EndianType GetEndianType () const
 Retrieves the natural byte order for the architecture.
 
void Clear () override
 Resets all fields to their default values, deallocate memory.
 
void AssignMagicValue ()
 
bool DetectCpuType (::EndianType expected)
 
void DetectCpuType ()
 
offset_t ImageSize () const override
 Retrieves size of stored data.
 
void SetupOptions (std::shared_ptr< Linker::OutputFormat > format) override
 Initializes the reader for linking purposes.
 
bool FormatRequiresDataStreamFix () const override
 Whether the generated file might contain bugs that require fixing.
 
void GenerateModule (Linker::Module &module) const override
 Loads the information into a module object, a convenience method when there is a single module generated.
 
 COFFFormat (format_type type=GENERIC, COFFVariantType coff_variant=COFF)
 
unsigned FormatAdditionalSectionFlags (std::string section_name) const override
 
void SetOptions (std::map< std::string, std::string > &options) override
 Passes command line parameters as settings over to format object.
 
void OnNewSegment (std::shared_ptr< Linker::Segment > segment) override
 Callback function when allocating a new segment When the linker script runs, it creates segments consecutively. Overriding this method permits the output format to handle the allocated segment.
 
void CreateDefaultSegments ()
 
std::unique_ptr< Script::ListGetScript (Linker::Module &module)
 
void Link (Linker::Module &module)
 
std::shared_ptr< Linker::SegmentGetSegment (std::unique_ptr< Section > &section)
 Return the segment stored inside the section, note that this only works for binary generation.
 
std::shared_ptr< Linker::SegmentGetCodeSegment ()
 
std::shared_ptr< Linker::SegmentGetDataSegment ()
 
std::shared_ptr< Linker::SegmentGetBssSegment ()
 
void ProcessModule (Linker::Module &module) override
 Processes the module object and initializes format fields.
 
void GenerateFile (std::string filename, Linker::Module &module) override
 The main function that handles processing, calculating and generating the final image.
 
- Public Member Functions inherited from Linker::InputFormat
virtual void ProduceModule (ModuleCollector &linker, Reader &rd, std::string file_name)
 Reads a file and loads the information into a module object.
 
virtual void ProduceModule (Module &module, Reader &rd)
 Reads a file and loads the information into a module object, a convenience method when there is a single module generated.
 
virtual void GenerateModule (ModuleCollector &linker, std::string file_name, bool is_library=false) const
 Loads the information into a module object.
 
virtual bool FormatProvidesSegmentation () const
 Whether the format enables multiple x86 segments.
 
virtual bool FormatProvidesResources () const
 Whether the format supports resources.
 
virtual bool FormatProvidesLibraries () const
 Whether the format enables importing/exporting libraries.
 
- Public Member Functions inherited from Linker::Format
 Format (offset_t file_offset=0)
 
offset_t ImageSize () const override
 Retrieves size of stored data.
 
offset_t WriteFile (Writer &wr, offset_t count, offset_t offset=0) const override
 Writes data of non-zero filled sections.
 
- Public Member Functions inherited from Linker::Image
virtual std::shared_ptr< const ActualImageAsImage () const
 Retrieves a randomly accessible image.
 
std::shared_ptr< ActualImageAsImage ()
 Retrieves a randomly accessible image.
 
- Public Member Functions inherited from Linker::SegmentManager
void ClearSegmentManager ()
 
void SetLinkScript (std::string script_file, std::map< std::string, std::string > &options) override
 Sets up the linker script and linker parameters.
 
std::unique_ptr< Script::ListGetScript (Module &module)
 Compiles the linker script into an internal format.
 
offset_t GetCurrentAddress () const
 Retrieves current address pointer.
 
void SetCurrentAddress (offset_t address)
 Moves the current address pointer further, and if the current segment already contains data, fill it up to the point.
 
void AlignCurrentAddress (offset_t align)
 Aligns current address to alignment, using SetCurrentAddress.
 
void SetLatestBase (offset_t address)
 Sets the base of the current section (the value from which offsets are counted from)
 
void FinishCurrentSegment ()
 Closes the current segment, sets current_segment to null.
 
std::shared_ptr< SegmentAppendSegment (std::string name)
 Terminates the current segment (if there is one), creates a new segment and attaches it to the image.
 
std::shared_ptr< SegmentFetchSegment (std::string name)
 Attempts to fetch a segment, returns null if not found.
 
void AppendSection (std::shared_ptr< Section > section)
 Adds a new section to the current segment, sets the base to the same as the segment.
 
void ProcessScript (std::unique_ptr< Script::List > &directives, Module &module)
 Executes a parsed linker script on a module and collects segments The function OnNewSegment can be defined to handle each newly allocated segment.
 
void ProcessAction (std::unique_ptr< Script::Node > &action, Module &module)
 
void PostProcessAction (std::unique_ptr< Script::Node > &action, Module &module)
 
void ProcessCommand (std::unique_ptr< Script::Node > &command, Module &module)
 
bool CheckPredicate (std::unique_ptr< Script::Node > &predicate, std::shared_ptr< Section > section, Module &module)
 
offset_t EvaluateExpression (std::unique_ptr< Script::Node > &expression, Module &module)
 
- Public Member Functions inherited from Linker::OutputFormat
virtual bool AddSupplementaryOutputFormat (std::string subformat)
 If the output format actually drives multiple output formats (resource file, apple double, etc.), specify multiple types, return false if unknown.
 
std::optional< std::string > FetchOption (std::map< std::string, std::string > &options, std::string name)
 Convenience method to look up option by name.
 
std::string FetchOption (std::map< std::string, std::string > &options, std::string name, std::string default_value)
 Convenience method to look up option by name, returning default value if name is missing.
 
std::optional< offset_t > FetchIntegerOption (std::map< std::string, std::string > &options, std::string name)
 Convenience method to look up option by name and convert it to integer.
 
virtual void SetModel (std::string model)
 Sets the way memory is organized, typically modifying a built-in script.
 
virtual std::string GetDefaultExtension (Module &module) const
 Provides a default filename for the output file.
 
virtual bool FormatSupportsSegmentation () const
 Whether the format supports multiple segments.
 
virtual bool FormatIs16bit () const
 Whether the format is 16-bit or not.
 
virtual bool FormatIsLinear () const
 Whether the address space is linear or segmented.
 
virtual bool FormatSupportsResources () const
 Whether the format supports resources.
 
virtual bool FormatSupportsLibraries () const
 Whether the format supports libraries.
 

Public Attributes

char pe_signature [4]
 
MZStubWriter stub
 
- Public Attributes inherited from COFF::COFFFormat
offset_t file_size
 
char signature [2] = { }
 The actual value of the magic number (COFF name: f_magic)
 
std::vector< std::unique_ptr< Section > > sections
 The list of COFF sections.
 
uint16_t section_count = 0
 Section count (COFF name: f_nscns)
 
uint32_t timestamp = 0
 Time stamp, unused (COFF name: f_timdat)
 
offset_t symbol_table_offset = 0
 Offset to the first symbol (COFF name: f_symptr)
 
uint32_t symbol_count = 0
 The number of symbols (COFF name: f_nsyms)
 
std::vector< std::unique_ptr< Symbol > > symbols
 The symbols stored inside the COFF file.
 
uint32_t optional_header_size = 0
 The size of the optional header (COFF: f_opthdr)
 
uint16_t flags = 0
 COFF flags, such as whether the file is executable (f_flags)
 
std::unique_ptr< OptionalHeaderoptional_header = nullptr
 The optional header instance used for reading/writing the COFF file.
 
std::map< uint32_t, size_t > relocations
 Concurrent DOS 68K requires a special block of data to represent "crunched" relocations (see CPM68KWriter for more details)
 
COFFVariantType coff_variant = COFFVariantType(0)
 
cpu cpu_type = CPU_UNKNOWN
 The CPU type, reflected by the first 16-bit word of a COFF file.
 
::EndianType endiantype = ::UndefinedEndian
 The byte order.
 
bool option_segmentation = false
 
Microsoft::MZSimpleStubWriter stub
 
format_type type = GENERIC
 A representation of the format to generate.
 
bool option_no_relocation = false
 Suppress relocation generation, only relevant for Concurrent DOS 68K, since the other target formats do not store relocations.
 
uint32_t stub_size = 0
 Size of MZ stub, only used for DJGPP COFF executables.
 
std::shared_ptr< Linker::Segmentstack
 Concurrent DOS 68K and FlexOS 386: The stack segment, not stored as part of any section.
 
uint32_t entry_address = 0
 Entry address, gets stored in optional header later.
 
uint32_t relocations_offset = 0
 Concurrent DOS 68K: Offset to relocations.
 
- Public Attributes inherited from Linker::Format
offset_t file_offset
 
- Public Attributes inherited from Linker::SegmentManager
offset_t current_base = 0
 The base address of the current section.
 
std::vector< std::shared_ptr< Segment > > segment_vector
 Ordered sequence of segments.
 
std::map< std::string, std::shared_ptr< Segment > > segment_map
 Map of segments from their names.
 
std::shared_ptr< Segmentcurrent_segment
 Currently processed segment.
 
std::map< std::string, Locationlinker_parameters
 Parameters that permit customizing the linker script.
 
std::string linker_script
 Contents of the linker script.
 

Protected Member Functions

void ReadOptionalHeader (Linker::Reader &rd)
 
- Protected Member Functions inherited from COFF::COFFFormat
void ReadCOFFHeader (Linker::Reader &rd)
 
void ReadOptionalHeader (Linker::Reader &rd)
 
void ReadRestOfFile (Linker::Reader &rd)
 
offset_t WriteFileContents (Linker::Writer &wr) const
 

Additional Inherited Members

- Public Types inherited from COFF::COFFFormat
enum  cpu {
  CPU_UNKNOWN = 0 , CPU_I386 = 0x014C , CPU_M68K = 0x0150 , CPU_W65 = 0x6500 ,
  CPU_Z80 = 0x805A , CPU_Z8K = 0x8000 , CPU_I86 = 0x0148 , CPU_NS32K = 0x0154 ,
  CPU_I370 = 0x0158 , CPU_MIPS = 0x0160 , CPU_M88K = 0x016D , CPU_WE32K = 0x0170 ,
  CPU_VAX = 0x0178 , CPU_AM29K = 0x017A , CPU_ALPHA = 0x0183 , CPU_PPC = 0x01DF ,
  CPU_PPC64 = 0x01F7 , CPU_SHARC = 0x521C , CPU_I860 = 0x014D , CPU_SH = 0x01A2 ,
  CPU_ARM = 0x01C0 , CPU_AM33 = 0x01D3 , CPU_IA64 = 0x0200 , CPU_HPPA = 0x0290 ,
  CPU_EFI = 0x0EBC , CPU_RISCV32 = 0x5032 , CPU_RISCV64 = 0x5064 , CPU_RISCV128 = 0x5128 ,
  CPU_AMD64 = 0x8664 , CPU_M32R = 0x9041 , CPU_ARM64 = 0xAA64
}
 Represents the first 16-bit word of a COFF file. More...
 
enum  COFFVariantType {
  COFF = 1 , ECOFF = 2 , XCOFF32 = 3 , XCOFF64 = 4 ,
  PECOFF = 5
}
 
enum  format_type { GENERIC , DJGPP , CDOS68K , CDOS386 }
 Represents the type of target system, which will determine the CPU type and several other fields. More...
 
enum  {
  FLAG_NO_RELOCATIONS = 0x0001 , FLAG_EXECUTABLE = 0x0002 , FLAG_NO_LINE_NUMBERS = 0x0004 , FLAG_NO_SYMBOLS = 0x0008 ,
  FLAG_32BIT_LITTLE_ENDIAN = 0x0100 , FLAG_32BIT_BIG_ENDIAN = 0x0200 , ZMAGIC = 0x010B
}
 COFF file header flags, most of these are obsolete, we only use them as precombined flag sets. More...
 
- Static Public Member Functions inherited from COFF::COFFFormat
static std::shared_ptr< COFFFormatCreateWriter (format_type type)
 
- Static Public Attributes inherited from COFF::COFFFormat
static const std::map< uint32_t, MachineTypeMACHINE_TYPES
 
- Protected Attributes inherited from Linker::SegmentManager
offset_t current_address = 0
 Holds the current address value when there is no current_segment.
 
bool current_is_template = false
 
bool current_is_template_head = false
 
offset_t template_counter = 0
 
std::string current_template_name
 

Detailed Description

Microsoft PE .EXE portable executable file format.

Member Function Documentation

◆ CalculateValues()

void PEFormat::CalculateValues ( )
overridevirtual

Intermediate step between processing module and generating output file to set up headers and management sections It is expected that after a module is processed, additional steps are required to evaluate the final values of the fields.

Reimplemented from COFF::COFFFormat.

◆ Dump()

void PEFormat::Dump ( Dumper::Dumper & dump) const
overridevirtual

Display file contents in a nice manner.

Reimplemented from COFF::COFFFormat.

◆ GetDefaultExtension()

std::string PEFormat::GetDefaultExtension ( Linker::Module & module,
std::string filename ) const
overridevirtual

Appends a default extension to the filename.

A typical behavior would be to append .exe at the end of the filename. The default action is to leave it intact.

Reimplemented from COFF::COFFFormat.

◆ ReadFile()

void PEFormat::ReadFile ( Linker::Reader & rd)
overridevirtual

Loads file into memory.

Reimplemented from COFF::COFFFormat.

◆ WriteFile()

offset_t PEFormat::WriteFile ( Linker::Writer & wr) const
overridevirtual

Stores data in memory to file.

Reimplemented from COFF::COFFFormat.


The documentation for this class was generated from the following files: