Sleigh Class Reference

Inheritance diagram for Sleigh:

Public Member Functions
	Sleigh (LoadImage *ld, ContextDatabase *c_db)
void	reset (LoadImage *ld, ContextDatabase *c_db)
virtual void	initialize (DocumentStorage &store)
	Initialize the translator given XML configuration documents. More...
virtual void	registerContext (const string &name, int4 sbit, int4 ebit)
	Add a new context variable to the model for this processor. More...
virtual void	setContextDefault (const string &nm, uintm val)
	Set the default value for a particular context variable. More...
virtual void	allowContextSet (bool val) const
	Toggle whether disassembly is allowed to affect context. More...
virtual int4	instructionLength (const Address &baseaddr) const
	Get the length of a machine instruction. More...
virtual int4	oneInstruction (PcodeEmit &emit, const Address &baseaddr) const
	Transform a single machine instruction into pcode. More...
virtual int4	printAssembly (AssemblyEmit &emit, const Address &baseaddr) const
	Disassemble a single machine instruction. More...
Public Member Functions inherited from SleighBase
	SleighBase (void)
	Construct an uninitialized translator.
bool	isInitialized (void) const
	Return true if this is initialized.
virtual	~SleighBase (void)
	Destructor.
virtual void	addRegister (const string &nm, AddrSpace *base, uintb offset, int4 size)
	Add a named register to the model for this processor. More...
virtual const VarnodeData &	getRegister (const string &nm) const
	Get a register as VarnodeData given its name. More...
virtual string	getRegisterName (AddrSpace *base, uintb off, int4 size) const
	Get the name of a register given its location. More...
virtual void	getAllRegisters (map< VarnodeData, string > &reglist) const
	Get a list of all register names and the corresponding location. More...
virtual void	getUserOpNames (vector< string > &res) const
	Get a list of all user-defined pcode ops. More...
SleighSymbol *	findSymbol (const string &nm) const
	Find a specific SLEIGH symbol by name in the current scope.
SleighSymbol *	findSymbol (uintm id) const
	Find a specific SLEIGH symbol by id.
SleighSymbol *	findGlobalSymbol (const string &nm) const
	Find a specific global SLEIGH symbol by name.
void	saveXml (ostream &s) const
	Write out the SLEIGH specification as an XML <sleigh> tag. More...
Public Member Functions inherited from Translate
	Translate (void)
	Constructor for the translator. More...
void	setDefaultFloatFormats (void)
	If no explicit float formats, set up default formats. More...
bool	isBigEndian (void) const
	Is the processor big endian? More...
const FloatFormat *	getFloatFormat (int4 size) const
	Get format for a particular floating point encoding. More...
int4	getAlignment (void) const
	Get the instruction alignment for the processor. More...
uintm	getUniqueBase (void) const
	Get the base offset for new temporary registers. More...
Public Member Functions inherited from AddrSpaceManager
	AddrSpaceManager (void)
	Construct an empty address space manager. More...
virtual	~AddrSpaceManager (void)
	Destroy the manager. More...
char	assignShortcut (spacetype tp) const
	Select a shortcut character for a new space. More...
int4	getDefaultSize (void) const
	Get size of addresses for the default space. More...
AddrSpace *	getSpaceByName (const string &nm) const
	Get address space by name. More...
AddrSpace *	getSpaceByShortcut (char sc) const
	Get address space from its shortcut. More...
AddrSpace *	getIopSpace (void) const
	Get the internal pcode op space. More...
AddrSpace *	getFspecSpace (void) const
	Get the internal callspec space. More...
AddrSpace *	getJoinSpace (void) const
	Get the joining space. More...
AddrSpace *	getStackSpace (void) const
	Get the stack space for this processor. More...
AddrSpace *	getUniqueSpace (void) const
	Get the temporary register space for this processor. More...
AddrSpace *	getDefaultSpace (void) const
	Get the default address space of this processor. More...
AddrSpace *	getConstantSpace (void) const
	Get the constant space. More...
Address	getConstant (uintb val) const
	Get a constant encoded as an Address. More...
Address	createConstFromSpace (AddrSpace *spc) const
	Create a constant address encoding an address space. More...
Address	resolveConstant (AddrSpace *spc, uintb val, int4 sz, const Address &point) const
	Resolve native constant to address.
int4	numSpaces (void) const
	Get the number of address spaces for this processor. More...
AddrSpace *	getSpace (int4 i) const
	Get an address space via its index. More...
AddrSpace *	getNextSpaceInOrder (AddrSpace *spc) const
	Get the next contiguous address space. More...
JoinRecord *	findAddJoin (const vector< VarnodeData > &pieces, uint4 logicalsize)
	Get (or create) JoinRecord for pieces. More...
JoinRecord *	findJoin (uintb offset) const
	Find JoinRecord for offset in the join space. More...
void	setDeadcodeDelay (int4 spcnum, int4 delaydelta)
	Set the deadcodedelay for a specific space. More...
void	truncateSpace (const TruncationTag &tag)
	Mark a space as truncated from its original size. More...
Address	constructFloatExtensionAddress (const Address &realaddr, int4 realsize, int4 logicalsize)
	Build a logically lower precision storage location for a bigger floating point register. More...
Address	constructJoinAddress (const Translate *translate, const Address &hiaddr, int4 hisz, const Address &loaddr, int4 losz)
	Build a logical whole from register pairs. More...

Protected Member Functions
ParserContext *	obtainContext (const Address &addr, int4 state) const
void	resolve (ParserContext &pos) const
void	resolveHandles (ParserContext &pos) const
Protected Member Functions inherited from SleighBase
void	buildXrefs (void)
	Build register map. Collect user-ops and context-fields. More...
void	reregisterContext (void)
	Reregister context fields for a new executable. More...
void	restoreXml (const Element *el)
	Read a SLEIGH specification from XML. More...
Protected Member Functions inherited from Translate
void	setBigEndian (bool val)
	Set general endianness to big if val is true. More...
void	setUniqueBase (uintm val)
	Set the base offset for new temporary registers. More...
Protected Member Functions inherited from AddrSpaceManager
AddrSpace *	restoreXmlSpace (const Element *el, const Translate *trans)
	Add a space to the model based an on XML tag. More...
void	restoreXmlSpaces (const Element *el, const Translate *trans)
	Restore address spaces in the model from an XML tag. More...
void	setDefaultSpace (int4 index)
	Set the default address space. More...
void	setReverseJustified (AddrSpace *spc)
	Set reverse justified property on this space. More...
void	insertSpace (AddrSpace *spc)
	Add a new address space to the model. More...
void	copySpaces (const AddrSpaceManager *op2)
	Copy spaces from another manager. More...
void	addSpacebasePointer (SpacebaseSpace *basespace, const VarnodeData &ptrdata, int4 truncSize, bool stackGrowth)
	Set the base register of a spacebase space. More...
void	insertResolver (AddrSpace *spc, AddressResolver *rsolv)
	Override the base resolver for a space. More...

Private Member Functions
void	clearForDelete (void)

Private Attributes
LoadImage *	loader
ContextDatabase *	context_db
ContextCache *	cache
DisassemblyCache *	discache
PcodeCacher	pcode_cache

Additional Inherited Members
Protected Attributes inherited from SleighBase
SubtableSymbol *	root
	The root SLEIGH decoding symbol.
SymbolTable	symtab
	The SLEIGH symbol table.
uint4	maxdelayslotbytes
	Maximum number of bytes in a delay-slot directive.
uint4	unique_allocatemask
	Bits that are guaranteed to be zero in the unique allocation scheme.
uint4	numSections
	Number of named sections.
Protected Attributes inherited from Translate
int4	alignment
	Byte modulo on which instructions are aligned.
vector< FloatFormat >	floatformats
	Floating point formats utilized by the processor.

Member Function Documentation

allowContextSet()

void Sleigh::allowContextSet ( bool  val ) const

virtual

Toggle whether disassembly is allowed to affect context.

By default the disassembly/pcode translation engine can change the global context, thereby affecting later disassembly. Context may be getting determined by something other than control flow in, the disassembly, in which case this function can turn off changes made by the disassembly

Parameters

val	is true to allow context changes, false prevents changes

Reimplemented from Translate.

References ContextCache::allowSet().

initialize()

void Sleigh::initialize ( DocumentStorage &  store )

virtual

Initialize the translator given XML configuration documents.

A translator gets initialized once, possibly using XML documents to configure it.

Parameters

store

is a set of configuration documents

Implements Translate.

References AddrSpaceManager::getConstantSpace(), SleighBase::isInitialized(), SleighBase::maxdelayslotbytes, SleighBase::reregisterContext(), SleighBase::restoreXml(), and SleighBase::unique_allocatemask.

instructionLength()

int4 Sleigh::instructionLength ( const Address &  baseaddr ) const

virtual

Get the length of a machine instruction.

This method decodes an instruction at a specific address just enough to find the number of bytes it uses within the instruction stream.

Parameters

baseaddr

is the Address of the instruction

Returns

the number of bytes in the instruction

Implements Translate.

oneInstruction()

int4 Sleigh::oneInstruction ( PcodeEmit &  emit, const Address &  baseaddr  ) const

virtual

Transform a single machine instruction into pcode.

This is the main interface to the pcode translation engine. The dump method in the emit object is invoked exactly once for each pcode operation in the translation for the machine instruction at the given address. This routine can throw either

• UnimplError or
• BadDataError

Parameters

emit	is the tailored pcode emitting object
baseaddr	is the Address of the machine instruction

Returns

the number of bytes in the machine instruction

Implements Translate.

References Translate::alignment, LowlevelError::explain, AddrSpaceManager::getConstantSpace(), Address::getOffset(), AddrSpaceManager::getUniqueSpace(), UnimplError::instruction_length, and SleighBase::unique_allocatemask.

printAssembly()

int4 Sleigh::printAssembly ( AssemblyEmit &  emit, const Address &  baseaddr  ) const

virtual

Disassemble a single machine instruction.

This is the main interface to the disassembler for the processor. It disassembles a single instruction and returns the result to the application via the dump method in the emit object.

Parameters

emit	is the disassembly emitting object
baseaddr	is the address of the machine instruction to disassemble

Implements Translate.

References AssemblyEmit::dump().

registerContext()

void Sleigh::registerContext ( const string &  name, int4  sbit, int4  ebit  )

virtual

Add a new context variable to the model for this processor.

Add the name of a context register used by the processor and how that register is packed into the context state. This information is used by a ContextDatabase to associate names with context information and to pack context into a single state variable for the translation engine.

Parameters

name	is the name of the new context variable
sbit	is the first bit of the variable in the packed state
ebit	is the last bit of the variable in the packed state

Reimplemented from Translate.

References ContextDatabase::registerVariable().

setContextDefault()

void Sleigh::setContextDefault ( const string &  name, uintm  val  )

virtual

Set the default value for a particular context variable.

Set the value to be returned for a context variable when there are no explicit address ranges specifying a value for the variable.

Parameters

name	is the name of the context variable
val	is the value to be considered default

Reimplemented from Translate.

References ContextDatabase::setVariableDefault().

---

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

• sleigh.hh
• sleigh.cc