An abstract Emulate class using a MemoryState object as the backing machine state. More...

#include <emulate.hh>

Inheritance diagram for ghidra::EmulateMemory:

Public Member Functions
	EmulateMemory (MemoryState *mem)
	Construct given a memory state.

MemoryState *	getMemoryState (void) const
	Get the emulator's memory state. More...

Public Member Functions inherited from ghidra::Emulate
	Emulate (void)
	generic emulator constructor

void	setHalt (bool val)
	Set the halt state of the emulator. More...

bool	getHalt (void) const
	Get the halt state of the emulator. More...

virtual void	setExecuteAddress (const Address &addr)=0
	Set the address of the next instruction to emulate.

virtual Address	getExecuteAddress (void) const =0
	Get the address of the current instruction being executed.

void	executeCurrentOp (void)
	Do a single pcode op step. More...

Protected Member Functions
virtual void	executeUnary (void)
	Execute a unary arithmetic/logical operation.

virtual void	executeBinary (void)
	Execute a binary arithmetic/logical operation.

virtual void	executeLoad (void)
	Standard behavior for a p-code LOAD.

virtual void	executeStore (void)
	Standard behavior for a p-code STORE.

virtual void	executeBranch (void)
	Standard behavior for a BRANCH. More...

virtual bool	executeCbranch (void)
	Check if the conditional of a CBRANCH is true. More...

virtual void	executeBranchind (void)
	Standard behavior for a BRANCHIND.

virtual void	executeCall (void)
	Standard behavior for a p-code CALL.

virtual void	executeCallind (void)
	Standard behavior for a CALLIND.

virtual void	executeCallother (void)
	Standard behavior for a user-defined p-code op.

virtual void	executeMultiequal (void)
	Standard behavior for a MULTIEQUAL (phi-node)

virtual void	executeIndirect (void)
	Standard behavior for an INDIRECT op.

virtual void	executeSegmentOp (void)
	Behavior for a SEGMENTOP.

virtual void	executeCpoolRef (void)
	Standard behavior for a CPOOLREF (constant pool reference) op.

virtual void	executeNew (void)
	Standard behavior for (low-level) NEW op.

Protected Member Functions inherited from ghidra::Emulate
virtual void	fallthruOp (void)=0
	Standard p-code fall-thru semantics.

Protected Attributes
MemoryState *	memstate
	The memory state of the emulator.

PcodeOpRaw *	currentOp
	Current op to execute.

Protected Attributes inherited from ghidra::Emulate
bool	emu_halted
	Set to true if the emulator is halted.

OpBehavior *	currentBehave
	Behavior of the next op to execute.

Detailed Description

An abstract Emulate class using a MemoryState object as the backing machine state.

Most p-code operations are implemented using the MemoryState to fetch and store values. Control-flow is implemented partially in that setExecuteAddress() is called to indicate which instruction is being executed. The derived class must provide

The following p-code operations are stubbed out and will throw an exception: CALLOTHER, MULTIEQUAL, INDIRECT, CPOOLREF, SEGMENTOP, and NEW. Of course the derived class can override these.

Member Function Documentation

◆ executeBranch()

void ghidra::EmulateMemory::executeBranch ( void )

protectedvirtual

Standard behavior for a BRANCH.

This routine performs a standard p-code BRANCH operation on the memory state. This same routine is used for CBRANCH operations if the condition has evaluated to true.

Implements ghidra::Emulate.

Reimplemented in ghidra::EmulatePcodeCache.