DigitalResearch::CPM8KFormat Class Reference

CP/M-8000 .z8k file format. More...

#include <cpm8k.h>

Inheritance diagram for DigitalResearch::CPM8KFormat:

Classes
struct	Relocation
class	Segment
	Represents a segment within the module. More...
struct	Symbol

Public Types
enum	magic_type {   MAGIC_SEGMENTED_OBJECT = 0xEE00 , MAGIC_SEGMENTED = 0xEE01 , MAGIC_NONSHARED_OBJECT = 0xEE02 , MAGIC_NONSHARED = 0xEE03 ,   MAGIC_SHARED_OBJECT = 0xEE06 , MAGIC_SHARED = 0xEE07 , MAGIC_SPLIT_OBJECT = 0xEE0A , MAGIC_SPLIT = 0xEE0B }

Public Member Functions
magic_type	GetSignature () const
void	SetSignature (magic_type magic)
void	Clear () override
	Resets all fields to their default values, deallocate memory.
	CPM8KFormat (magic_type magic=MAGIC_NONSHARED)
void	ReadFile (Linker::Reader &rd) override
	Loads file into memory.
void	WriteFile (Linker::Writer &wr) override
	Stores data in memory to file.
void	Dump (Dumper::Dumper &dump) override
	Display file contents in a nice manner.
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.
bool	FormatSupportsSegmentation () const override
	Whether the format supports multiple segments.
std::vector< std::shared_ptr< Linker::Segment > > &	Segments ()
unsigned	GetSegmentNumber (std::shared_ptr< Linker::Segment > segment)
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
bool	IsCombined ()
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	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.
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)
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
char	signature [2]
	The magic number at the beginning of the executable file.
uint16_t	segment_count = 0
	Number of segments in the segment_array.
uint32_t	total_size = 0
	Total number of bytes in all the segments combined.
uint32_t	relocation_size = 0
	Total size of relocations.
uint32_t	symbol_table_size = 0
	Total size of symbols.
std::vector< Segment >	segments
std::vector< Relocation >	relocations
std::vector< Symbol >	symbols
std::shared_ptr< Linker::Segment >	bss_segment
	Segment to collect bss.
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

CP/M-8000 .z8k file format.

Member Function Documentation

CalculateValues()

void CPM8KFormat::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 CPM8KFormat::Clear ( )

overridevirtual

Resets all fields to their default values, deallocate memory.

Reimplemented from Linker::Format.

Dump()

void CPM8KFormat::Dump ( Dumper::Dumper & dump )

overridevirtual

Display file contents in a nice manner.

Reimplemented from Linker::Format.

FormatSupportsSegmentation()

bool CPM8KFormat::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 CPM8KFormat::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 CPM8KFormat::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.

ProcessModule()

void CPM8KFormat::ProcessModule ( Linker::Module & object )

overridevirtual

Processes the module object and initializes format fields.

Reimplemented from Linker::OutputFormat.

ReadFile()

void CPM8KFormat::ReadFile ( Linker::Reader & in )

overridevirtual

Loads file into memory.

Implements Linker::Format.

SetOptions()

void CPM8KFormat::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 CPM8KFormat::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/cpm8k.h
• src/format/cpm8k.cc