Special Datatype object used to describe pointers that index into the symbol table. More...

#include <type.hh>

Inheritance diagram for TypeSpacebase:

Public Member Functions
	TypeSpacebase (const TypeSpacebase &op)
	Construct from another TypeSpacebase.

	TypeSpacebase (AddrSpace id, const Address &frame, Architecture g)
	Construct given an address space, scope, and architecture.

Scope *	getMap (void) const
	Get the symbol table indexed by this. More...

Address	getAddress (uintb off, int4 sz, const Address &point) const
	Construct an Address given an offset. More...

virtual Datatype *	getSubType (uintb off, uintb *newoff) const
	Recover component data-type one-level down. More...

virtual Datatype *	nearestArrayedComponentForward (uintb off, uintb newoff, int4 elSize) const

virtual Datatype *	nearestArrayedComponentBackward (uintb off, uintb newoff, int4 elSize) const

virtual int4	compare (const Datatype &op, int4 level) const
	Compare for functional equivalence. More...

virtual int4	compareDependency (const Datatype &op) const
	Compare for storage in tree structure. More...

virtual Datatype *	clone (void) const
	Clone the data-type.

virtual void	saveXml (ostream &s) const
	Serialize the data-type to XML. More...

Public Member Functions inherited from Datatype
	Datatype (const Datatype &op)
	Construct the base data-type copying low-level properties of another.

	Datatype (int4 s, type_metatype m)
	Construct the base data-type providing size and meta-type.

	Datatype (int4 s, type_metatype m, const string &n)
	Construct the base data-type providing size, meta-type, and name.

virtual	~Datatype (void)
	Destructor.

bool	isCoreType (void) const
	Is this a core data-type.

bool	isCharPrint (void) const
	Does this print as a 'char'.

bool	isEnumType (void) const
	Is this an enumerated type.

bool	isPowerOfTwo (void) const
	Is this a flag-based enumeration.

bool	isASCII (void) const
	Does this print as an ASCII 'char'.

bool	isUTF16 (void) const
	Does this print as UTF16 'wchar'.

bool	isUTF32 (void) const
	Does this print as UTF32 'wchar'.

bool	isVariableLength (void) const
	Is this a variable length structure.

bool	hasSameVariableBase (const Datatype *ct) const
	Are these the same variable length data-type. More...

bool	isOpaqueString (void) const
	Is this an opaquely encoded string.

uint4	getInheritable (void) const
	Get properties pointers inherit.

type_metatype	getMetatype (void) const
	Get the type meta-type.

uint8	getId (void) const
	Get the type id.

int4	getSize (void) const
	Get the type size.

const string &	getName (void) const
	Get the type name.

virtual void	printRaw (ostream &s) const
	Print a description of the type to stream. More...

virtual int4	numDepend (void) const
	Return number of component sub-types.

virtual Datatype *	getDepend (int4 index) const
	Return the i-th component sub-type.

virtual void	printNameBase (ostream &s) const
	Print name as short prefix.

int4	typeOrder (const Datatype &op) const
	Order this with -op- datatype.

int4	typeOrderBool (const Datatype &op) const
	Order this with -op-, treating bool data-type as special. More...

void	saveXmlBasic (ostream &s) const
	Save basic data-type properties. More...

void	saveXmlRef (ostream &s) const
	Write an XML reference of this to stream. More...

bool	isPtrsubMatching (uintb offset) const
	Is this data-type suitable as input to a CPUI_PTRSUB op. More...

Private Member Functions
virtual void	restoreXml (const Element *el, TypeFactory &typegrp)
	Restore data-type from XML. More...

Private Attributes
AddrSpace *	spaceid
	The address space we are treating as a structure.

Address	localframe
	Address of function whose symbol table is indexed (or INVALID for "global")

Architecture *	glb
	Architecture for accessing symbol table.

Friends
class	TypeFactory

Additional Inherited Members
Protected Types inherited from Datatype
enum	{ coretype = 1, chartype = 2, enumtype = 4, poweroftwo = 8, utf16 = 16, utf32 = 32, opaque_string = 64, variable_length = 128 }
	Boolean properties of datatypes. More...

Protected Member Functions inherited from Datatype
void	restoreXmlBasic (const Element *el)
	Recover basic data-type properties. More...

Static Protected Member Functions inherited from Datatype
static uint8	hashName (const string &nm)
	Produce a data-type id by hashing the type name. More...

static uint8	hashSize (uint8 id, int4 size)
	Reversibly hash size into id. More...

Protected Attributes inherited from Datatype
int4	size
	Size (of variable holding a value of this type)

string	name
	Name of type.

type_metatype	metatype
	Meta-type - type disregarding size.

uint4	flags
	Boolean properties of the type.

uint8	id
	A unique id for the type (or 0 if an id is not assigned)

Detailed Description

Special Datatype object used to describe pointers that index into the symbol table.

A TypeSpacebase treats a specific AddrSpace as "structure" that will get indexed in to. This facilitates type propagation from local symbols into the stack space and from global symbols into the RAM space.

Member Function Documentation

int4 TypeSpacebase::compare	(	const Datatype &	op,
		int4	level
	)		const

virtual

Compare for functional equivalence.

0 (equality) means the data-types are functionally equivalent (even if names differ) Smaller types come earlier. More specific types come earlier.

Parameters

op	is the data-type to compare with this
level	is maximum level to descend when recursively comparing

Returns: negative, 0, positive depending on ordering of types

Reimplemented from Datatype.

References Datatype::compareDependency().

int4 TypeSpacebase::compareDependency ( const Datatype & op ) const

virtual

Compare for storage in tree structure.

Ordering of data-types for the main TypeFactory container. Comparison only goes down one-level in the component structure, before just comparing pointers.

Parameters

op	is the data-type to compare with this

Returns: negative, 0, positive depending on ordering of types

Reimplemented from Datatype.

References Datatype::getMetatype(), Datatype::getSize(), localframe, Datatype::metatype, Datatype::size, and spaceid.

Address TypeSpacebase::getAddress	(	uintb	off,
		int4	sz,
		const Address &	point
	)		const

Construct an Address given an offset.

Return the Address being referred to by a specific offset relative to a pointer with this Datatype

Parameters

off	is the offset relative to the pointer
sz	is the size of offset (as a pointer)
point	is a "context" reference for the request

Returns: the referred to Address

Referenced by RulePtrsubCharConstant::applyOp(), Funcdata::linkSymbolReference(), PrintC::opPtrsub(), and ActionInferTypes::propagateSpacebaseRef().

Scope * TypeSpacebase::getMap ( void ) const

Get the symbol table indexed by this.

This data-type can index either a local or the global scope

Returns: the symbol table Scope

Referenced by RulePtrsubCharConstant::applyOp(), and Funcdata::linkSymbolReference().

Datatype * TypeSpacebase::getSubType	(	uintb	off,
		uintb *	newoff
	)		const

virtual

Recover component data-type one-level down.

Given an offset into this data-type, return the component data-type at that offset. Also, pass back a "renormalized" offset suitable for recursize getSubType() calls: i.e. if the original offset hits the exact start of the sub-type, 0 is passed back. If there is no valid component data-type at the offset, return NULL and pass back the original offset

Parameters

off	is the offset into this data-type
newoff	is a pointer to the passed-back offset

Returns: a pointer to the component data-type or NULL

Reimplemented from Datatype.

Datatype * TypeSpacebase::nearestArrayedComponentBackward	(	uintb	off,
		uintb *	newoff,
		int4 *	elSize
	)		const

virtual

Find the first component data-type before the given offset that is (or contains) an array, and pass back the difference between the component's start and the given offset. Return the component data-type or null if no array is found.

Parameters

off	is the given offset into this data-type
newoff	is used to pass back the offset difference
elSize	is used to pass back the array element size

Returns: the component data-type or null

Reimplemented from Datatype.

References Datatype::getMetatype(), Datatype::getSubType(), Datatype::nearestArrayedComponentBackward(), TYPE_ARRAY, and TYPE_STRUCT.

Datatype * TypeSpacebase::nearestArrayedComponentForward	(	uintb	off,
		uintb *	newoff,
		int4 *	elSize
	)		const

virtual

Find the first component data-type after the given offset that is (or contains) an array, and pass back the difference between the component's start and the given offset. Return the component data-type or null if no array is found.

Parameters

off	is the given offset into this data-type
newoff	is used to pass back the offset difference
elSize	is used to pass back the array element size

Returns: the component data-type or null

Reimplemented from Datatype.

References Datatype::nearestArrayedComponentForward(), and TYPE_STRUCT.

void TypeSpacebase::restoreXml	(	const Element *	el,
		TypeFactory &	typegrp
	)

privatevirtual

Restore data-type from XML.

Restore a Datatype object from an XML element

Parameters

el	is the XML element
typegrp	is the underlying TypeFactory that will hold the new object

Reimplemented from Datatype.

Referenced by TypeFactory::restoreXmlTypeNoRef().

void TypeSpacebase::saveXml ( ostream & s ) const

virtual

Serialize the data-type to XML.

Write out a formal description of the data-type as an XML <type> tag. For composite data-types, the description goes down one level, describing the component types only by reference.

Parameters

s	is the stream to write to

Reimplemented from Datatype.

References a_v(), and Datatype::saveXmlBasic().

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

type.hh
type.cc

Public Member Functions

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Member Function Documentation