LE/LX .EXE linear executable file format. More...

#include <leexe.h>

Inheritance diagram for Microsoft::LEFormat:

Classes
class	Entry

struct	Name

class	Object

class	Page

class	Resource

Public Types
enum	system_type { OS2 = 1 , Windows , MSDOS4 , Windows386 , DOS4G = -1 }

enum	{ PreProcessInitialization = 0x00000004 , NoInternalFixup = 0x00000010 , NoExternalFixup = 0x00000020 , FullScreen = 0x00000100 , GUIAware = 0x00000200 , GUI = 0x00000300 , ErrorInImage = 0x00002000 , Library = 0x00008000 , ProtectedMemoryLibrary = 0x00018000 , PhysicalDriver = 0x00020000 , VirtualDriver = 0x00028000 , PerProcessTermination = 0x40000000 }

enum	cpu_type { I286 = 0x01 , I386 = 0x02 , I486 = 0x03 , I860_N10 = 0x20 , I860_N11 = 0x21 , MIPS1 = 0x40 , MIPS2 = 0x41 , MIPS3 = 0x42 }

enum	compatibility_type { CompatibleNone , CompatibleWatcom , CompatibleMicrosoft , CompatibleGNU }

Public Member Functions
void	ReadFile (Linker::Reader &rd) override
	Loads file into memory.

bool	FormatSupportsSegmentation () const override
	Whether the format supports multiple segments.

bool	FormatSupportsLibraries () const override
	Whether the format supports libraries.

unsigned	FormatAdditionalSectionFlags (std::string section_name) const override

bool	IsOS2 () const

bool	IsLibrary () const

bool	IsDriver () const

	LEFormat (unsigned system, unsigned module_flags, bool extended_format)

std::shared_ptr< LEFormat >	SimulateLinker (compatibility_type compatibility)

void	AddRelocation (Object &object, unsigned type, unsigned flags, size_t offset, uint16_t module, uint32_t target=0, uint32_t addition=0)

unsigned	GetDefaultObjectFlags () const

void	AddObject (const Object &object)

uint16_t	FetchImportedModuleName (std::string name)

uint16_t	FetchImportedProcedureName (std::string name)

uint16_t	MakeEntry (Linker::Position value)

uint16_t	MakeEntry (uint16_t index, Linker::Position value)

uint8_t	CountBundles (size_t entry_index)

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.

std::unique_ptr< Script::List >	GetScript (Linker::Module &module)

void	Link (Linker::Module &module)

void	ProcessModule (Linker::Module &module) override
	Processes the module object and initializes format fields.

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.

void	WriteFile (Linker::Writer &wr) override
	Stores data in memory to file.

void	GenerateFile (std::string filename, Linker::Module &module) override
	The main function that handles processing, calculating and generating the final image.

std::string	GetDefaultExtension (Linker::Module &module, std::string filename) override
	Appends a default extension to the filename.

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 void	SetLinkScript (std::string script_file, std::map< std::string, std::string > &options)
	Selects a script file to use for linking.

virtual std::string	GetDefaultExtension (Linker::Module &module)
	Provides a default filename for the output file.

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.

Public Member Functions inherited from Linker::Format
	Format (offset_t file_offset=0)

virtual void	Clear ()
	Resets all fields to their default values, deallocate memory.

virtual void	Dump (Dumper::Dumper &dump)
	Display file contents in a nice manner.

Public Member Functions inherited from Linker::LinkerManager
void	ClearLinkerManager ()

void	SetLinkScript (std::string script_file, std::map< std::string, std::string > &options)
	Sets up the linker script and linker parameters.

bool	SetLinkerParameter (std::map< std::string, std::string > &options, std::string key)
	Sets a single linker parameter, if inside options.

bool	SetLinkerParameter (std::map< std::string, std::string > &options, std::string key, std::string variable)
	Sets a single linker parameter, if inside options.

std::unique_ptr< Script::List >	GetScript (Linker::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< Segment >	AppendSegment (std::string name)
	Terminates the current segment (if there is one), creates a new segment and attaches it to the image.

std::shared_ptr< Segment >	FetchSegment (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)

Static Public Member Functions
static std::shared_ptr< LEFormat >	CreateConsoleApplication (system_type system=OS2)

static std::shared_ptr< LEFormat >	CreateGUIApplication (system_type system=OS2)

static std::shared_ptr< LEFormat >	CreateLibraryModule (system_type system=OS2)

Public Attributes
::EndianType	endiantype = ::LittleEndian

enum Microsoft::LEFormat::system_type	system

uint32_t	module_flags

bool	extended_format

cpu_type	cpu = I386

compatibility_type	compatibility = CompatibleNone

std::string	program_name

std::string	module_name

uint32_t	page_count = 0

uint32_t	eip_object = 0

uint32_t	eip_value = 0

uint32_t	esp_object = 0

uint32_t	esp_value = 0

union {

uint32_t last_page_size

uint32_t page_offset_shift

};

uint32_t	fixup_section_size = 0

uint32_t	loader_section_size = 0

uint32_t	object_table_offset = 0

uint32_t	object_page_table_offset = 0

uint32_t	object_iterated_pages_offset = 0

uint32_t	resource_table_offset = 0

uint32_t	resource_table_entry_count = 0

uint32_t	resident_name_table_offset = 0

uint32_t	entry_table_offset = 0

uint32_t	fixup_page_table_offset = 0

uint32_t	fixup_record_table_offset = 0

uint32_t	imported_module_table_offset = 0

uint32_t	imported_procedure_table_offset = 0

uint32_t	data_pages_offset = 0

uint32_t	nonresident_name_table_offset = 0

uint32_t	nonresident_name_table_size = 0

uint32_t	automatic_data = 0

uint32_t	stack_size = 0

uint32_t	heap_size = 0

std::shared_ptr< Linker::Segment >	stack

std::shared_ptr< Linker::Segment >	heap

std::vector< Object >	objects

std::map< std::shared_ptr< Linker::Segment >, size_t >	object_index

std::vector< Page >	pages

std::vector< Resource >	resources

std::vector< Name >	resident_names

std::vector< Name >	nonresident_names

std::vector< Entry >	entries

std::vector< std::string >	imported_modules

std::vector< std::string >	imported_procedures

std::map< std::string, uint32_t >	imported_procedure_name_offsets

offset_t	imported_procedure_names_length = 0

Public Attributes inherited from Linker::Format
offset_t	file_offset

Public Attributes inherited from Linker::LinkerManager
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< Segment >	current_segment
	Currently processed segment.

std::map< std::string, Location >	linker_parameters
	Parameters that permit customizing the linker script.

std::string	linker_script
	Contents of the linker script.

Static Public Attributes
static const uint32_t	page_size = 0x1000

Additional Inherited Members
Protected Member Functions inherited from Microsoft::MZStubWriter
	MZStubWriter (std::string stub_file="")

bool	OpenAndCheckValidFile ()

offset_t	GetStubImageSize ()

void	WriteStubImage (std::ostream &out)

void	WriteStubImage (Linker::Writer &wr)

Protected Attributes inherited from Linker::LinkerManager
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

Protected Attributes inherited from Microsoft::MZStubWriter
std::string	stub_file

bool	stub_file_valid = true

std::ifstream	stub

uint32_t	original_file_size = -1

uint32_t	stub_file_size = 0

uint16_t	stub_reloc_count = 0

uint32_t	original_header_size = 0

uint32_t	stub_header_size = 0

uint16_t	original_reloc_offset = 0

uint16_t	stub_reloc_offset = 0

Detailed Description

LE/LX .EXE linear executable file format.

Introduced first for 32-bit virtual device drivers for 16-bit versions of Windows, it was adopted and extended for 32-bit versions of OS/2 as well as a few DOS extenders. It has two main variants, the LE and the LX executable formats.

The following platforms are supported:

Windows/386 device drivers, LE format (not tested or fully supported)
LE executables for the DOS/4G DOS extender
LX executables for 32-bit versions of OS/2

Member Function Documentation

◆ CalculateValues()

void LEFormat::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 Linker::OutputFormat.

◆ FormatAdditionalSectionFlags()

unsigned LEFormat::FormatAdditionalSectionFlags ( std::string section_name ) const

overridevirtual

Reimplemented from Linker::OutputFormat.

◆ FormatSupportsLibraries()

bool LEFormat::FormatSupportsLibraries ( ) const

overridevirtual

Whether the format supports libraries.

Reimplemented from Linker::OutputFormat.

◆ FormatSupportsSegmentation()

bool LEFormat::FormatSupportsSegmentation ( ) const

overridevirtual

Whether the format supports multiple segments.

This is typically true for Intel 8086 targets and false for non-Intel targets. The ELF parser uses this to provide extended relocations, including the following:

$$SEG$<section name>
$$SEGOF$<symbol name>
$$SEGAT$<symbol name>
$$WRTSEG$<symbol name>$<section name>
$$SEGDIF$<section name>$<section name>

Reimplemented from Linker::OutputFormat.

◆ GenerateFile()

void LEFormat::GenerateFile	(	std::string	filename,
		Linker::Module &	module )

overridevirtual

The main function that handles processing, calculating and generating the final image.

Reimplemented from Linker::OutputFormat.

◆ GetDefaultExtension()

std::string LEFormat::GetDefaultExtension	(	Linker::Module &	module,
		std::string	filename )

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 Linker::OutputFormat.

◆ OnNewSegment()

void LEFormat::OnNewSegment ( std::shared_ptr< Linker::Segment > segment )

overridevirtual

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.

Reimplemented from Linker::LinkerManager.

◆ ProcessModule()

void LEFormat::ProcessModule ( Linker::Module & object )

overridevirtual

Processes the module object and initializes format fields.

Reimplemented from Linker::OutputFormat.

◆ ReadFile()

void LEFormat::ReadFile ( Linker::Reader & in )

overridevirtual

Loads file into memory.

Implements Linker::Format.

◆ SetOptions()

void LEFormat::SetOptions ( std::map< std::string, std::string > & options )

overridevirtual

Passes command line parameters as settings over to format object.

Reimplemented from Linker::OutputFormat.

◆ WriteFile()

void LEFormat::WriteFile ( Linker::Writer & out )

overridevirtual

Stores data in memory to file.

Implements Linker::Format.

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

src/format/leexe.h
src/format/leexe.cc

Classes

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ CalculateValues()

◆ FormatAdditionalSectionFlags()

◆ FormatSupportsLibraries()

◆ FormatSupportsSegmentation()

◆ GenerateFile()

◆ GetDefaultExtension()

◆ OnNewSegment()

◆ ProcessModule()

◆ ReadFile()

◆ SetOptions()

◆ WriteFile()