Package ghidra.pcode.emu

Class DefaultPcodeThread.PcodeThreadExecutor<T>

java.lang.Object

ghidra.pcode.exec.PcodeExecutor<T>

ghidra.pcode.emu.DefaultPcodeThread.PcodeThreadExecutor<T>

Type Parameters:

T - the type of variables in the emulator

Direct Known Subclasses:

TaintPcodeThreadExecutor

Enclosing class:

DefaultPcodeThread<T>

public static class DefaultPcodeThread.PcodeThreadExecutor<T>
extends PcodeExecutor<T>

An executor for the p-code thread

This executor checks for thread suspension and updates the program counter register upon execution of (external) branches.

Field Summary

Fields

Modifier and Type	Field	Description
protected final DefaultPcodeThread<T>	thread

Fields inherited from class ghidra.pcode.exec.PcodeExecutor

arithmetic, language, pc, pcSize, reason, state

Constructor Summary

Constructors

Constructor	Description
PcodeThreadExecutor(DefaultPcodeThread<T> thread)	Construct the executor

Method Summary

Modifier and Type	Method	Description
protected void	afterLoad(PcodeOp op, AddressSpace space, T offset, int size, T value)	Extension point: logic proceeding a load
protected void	afterStore(PcodeOp op, AddressSpace space, T offset, int size, T value)	Extension point: logic proceeding a store
protected void	beforeLoad(PcodeOp op, AddressSpace space, T offset, int size)	Extension point: logic preceding a load
protected void	beforeStore(PcodeOp op, AddressSpace space, T offset, int size, T value)	Extension point: logic preceding a store
protected void	branchToAddress(PcodeOp op, Address target)	Extension point: Called when execution branches to a target address
void	executeSleigh(String source)	Compile and execute a block of Sleigh
DefaultPcodeThread<T>	getThread()	Get the thread owning this executor
protected void	onMissingUseropDef(PcodeOp op, PcodeFrame frame, String opName, PcodeUseropLibrary<T> library)	Extension point: Behavior when a userop definition was not found in the library
void	stepOp(PcodeOp op, PcodeFrame frame, PcodeUseropLibrary<T> library)	Step one p-code op

Methods inherited from class ghidra.pcode.exec.PcodeExecutor

badOp, begin, begin, branchInternal, branchToOffset, branchToOffset, checkInjectedTarget, doExecuteBranch, doExecuteIndirectBranch, execute, execute, executeBinaryOp, executeBranch, executeCall, executeCallother, executeConditionalBranch, executeIndirectBranch, executeIndirectCall, executeLoad, executeReturn, executeStore, executeUnaryOp, finish, getArithmetic, getBranchTarget, getCallotherOpNumber, getConditionalBranchPredicate, getIndirectBranchTarget, getIntConst, getLanguage, getLoadStoreOffset, getLoadStoreSpace, getReason, getState, getStoreValue, getUseropName, skip, step

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

thread

protected final DefaultPcodeThread<T> thread

Constructor Details

PcodeThreadExecutor

public PcodeThreadExecutor(DefaultPcodeThread<T> thread)

Construct the executor

Parameters:

thread - the thread this executor supports

See Also:

• DefaultPcodeThread.createExecutor()

Method Details

executeSleigh

public void executeSleigh(String source)

Description copied from class: PcodeExecutor

Compile and execute a block of Sleigh

Overrides:

executeSleigh in class PcodeExecutor<T>

Parameters:

source - the Sleigh source

stepOp

public void stepOp(PcodeOp op,
 PcodeFrame frame,
 PcodeUseropLibrary<T> library)

Description copied from class: PcodeExecutor

Step one p-code op

Overrides:

stepOp in class PcodeExecutor<T>

Parameters:

op - the op

frame - the current frame

library - the library, invoked in case of PcodeOp.CALLOTHER

beforeLoad

protected void beforeLoad(PcodeOp op,
 AddressSpace space,
 T offset,
 int size)

Description copied from class: PcodeExecutor

Extension point: logic preceding a load

Overrides:

beforeLoad in class PcodeExecutor<T>

Parameters:

op - the op performing the load

space - the address space to be loaded from

offset - the offset about to be loaded from

size - the size in bytes to be loaded

afterLoad

protected void afterLoad(PcodeOp op,
 AddressSpace space,
 T offset,
 int size,
 T value)

Description copied from class: PcodeExecutor

Extension point: logic proceeding a load

Overrides:

afterLoad in class PcodeExecutor<T>

Parameters:

op - the op performing the load

space - the address space loaded from

offset - the offset about loaded from

size - the size in bytes loaded

value - the value loaded

beforeStore

protected void beforeStore(PcodeOp op,
 AddressSpace space,
 T offset,
 int size,
 T value)

Description copied from class: PcodeExecutor

Extension point: logic preceding a store

Overrides:

beforeStore in class PcodeExecutor<T>

Parameters:

op - the op performing the store

space - the address space to be stored to

offset - the offset about to be stored to

size - the size in bytes to be stored

afterStore

protected void afterStore(PcodeOp op,
 AddressSpace space,
 T offset,
 int size,
 T value)

Description copied from class: PcodeExecutor

Extension point: logic proceeding a store

Overrides:

afterStore in class PcodeExecutor<T>

Parameters:

op - the op performing the store

space - the address space to be stored to

offset - the offset about to be stored to

size - the size in bytes to be stored

value - the value stored

branchToAddress

protected void branchToAddress(PcodeOp op,
 Address target)

Description copied from class: PcodeExecutor

Extension point: Called when execution branches to a target address

NOTE: This is not called for the fall-through case

Overrides:

branchToAddress in class PcodeExecutor<T>

Parameters:

target - the target address

onMissingUseropDef

protected void onMissingUseropDef(PcodeOp op,
 PcodeFrame frame,
 String opName,
 PcodeUseropLibrary<T> library)

Description copied from class: PcodeExecutor

Extension point: Behavior when a userop definition was not found in the library

The default behavior is to throw a SleighLinkException.

Overrides:

onMissingUseropDef in class PcodeExecutor<T>

Parameters:

op - the op

frame - the frame

opName - the name of the p-code userop

library - the library

getThread

public DefaultPcodeThread<T> getThread()

Get the thread owning this executor

Returns:

the thread