Ergo::XPFormat Class Reference

Ergo OS/286 and OS/386 "XP" .exp file (Ergo was formerly A.I. Architects, then Eclipse) More...

#include <xpexp.h>

Inheritance diagram for Ergo::XPFormat:

Classes
struct	Segment

Public Member Functions
void	Clear () override
	Resets all fields to their default values, deallocate 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.
void	ReadFile (Linker::Reader &in) override
	Loads file into memory.
void	WriteFile (Linker::Writer &out) override
	Stores data in memory to file.
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.
virtual void	SetOptions (std::map< std::string, std::string > &options)
	Passes command line parameters as settings over to format object.
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 void	ProcessModule (Linker::Module &object)
	Processes the module object and initializes format fields.
virtual void	GenerateFile (std::string filename, Linker::Module &module)
	The main function that handles processing, calculating and generating the final image.
virtual std::string	GetDefaultExtension (Linker::Module &module)
	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.
virtual unsigned	FormatAdditionalSectionFlags (std::string section_name) const
Public Member Functions inherited from Linker::Format
	Format (offset_t file_offset=0)
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.
virtual void	OnNewSegment (std::shared_ptr< Segment > segment)
	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::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)

Public Attributes
std::string	stub_file
uint32_t	offset = 0
uint32_t	ldt_offset = 0
uint32_t	image_offset = 0
uint32_t	relocation_offset = 0
uint32_t	minimum_extent = 0
uint32_t	maximum_extent = 0
uint32_t	unknown_field = 0
uint32_t	gs
uint32_t	fs
uint32_t	ds
uint32_t	ss
uint32_t	cs
uint32_t	es
uint32_t	edi
uint32_t	esi
uint32_t	ebp
uint32_t	esp
uint32_t	ebx
uint32_t	edx
uint32_t	ecx
uint32_t	eax
uint32_t	eflags
uint32_t	eip
std::vector< Segment >	ldt
std::shared_ptr< Linker::Writable >	image
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.

Additional Inherited Members
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

Detailed Description

Ergo OS/286 and OS/386 "XP" .exp file (Ergo was formerly A.I. Architects, then Eclipse)

Member Function Documentation

CalculateValues()

void XPFormat::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.

Clear()

void XPFormat::Clear ( )

overridevirtual

Resets all fields to their default values, deallocate memory.

Reimplemented from Linker::Format.

GetDefaultExtension()

std::string XPFormat::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.

ReadFile()

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

overridevirtual

Loads file into memory.

Implements Linker::Format.

WriteFile()

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

overridevirtual

Stores data in memory to file.

Implements Linker::Format.

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

• src/format/xpexp.h
• src/format/xpexp.cc