Package ghidra.pcode.memstate

Class MemoryPageOverlay

java.lang.Object

ghidra.pcode.memstate.MemoryBank

ghidra.pcode.memstate.MemoryPageBank

ghidra.pcode.memstate.MemoryPageOverlay

Direct Known Subclasses:

FilteredMemoryPageOverlay

public class MemoryPageOverlay
extends MemoryPageBank

Memory bank that overlays some other memory bank, using a "copy on write" behavior.

Pages are copied from the underlying object only when there is a write. The underlying access routines are overridden to make optimal use of this page implementation. The underlying memory bank can be a null pointer in which case, this memory bank behaves as if it were initially filled with zeros.

Field Summary

Fields

Modifier and Type	Field	Description
protected MemoryBank	underlie

Fields inherited from class ghidra.pcode.memstate.MemoryPageBank

page

Fields inherited from class ghidra.pcode.memstate.MemoryBank

faultHandler

Constructor Summary

Constructors

Constructor	Description
MemoryPageOverlay(AddressSpace spc, MemoryBank ul, MemoryFaultHandler faultHandler)	A page overlay memory bank needs all the parameters for a generic memory bank and it needs to know the underlying memory bank being overlayed.

Method Summary

Modifier and Type	Method	Description
protected MemoryPage	getPage(long addr)

Methods inherited from class ghidra.pcode.memstate.MemoryPageBank

setPage, setPageInitialized

Methods inherited from class ghidra.pcode.memstate.MemoryBank

constructValue, deconstructValue, getChunk, getInitializedMaskSize, getMemoryFaultHandler, getPageSize, getSpace, isBigEndian, setChunk, setInitialized

Methods inherited from class java.lang.Object

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

Field Details

underlie

protected MemoryBank underlie

Constructor Details

MemoryPageOverlay

public MemoryPageOverlay(AddressSpace spc,
 MemoryBank ul,
 MemoryFaultHandler faultHandler)

A page overlay memory bank needs all the parameters for a generic memory bank and it needs to know the underlying memory bank being overlayed.

Parameters:

spc - is the address space associated with the memory bank

ul - is the underlying MemoryBank

faultHandler -

Method Details

getPage

protected MemoryPage getPage(long addr)

Overrides:

getPage in class MemoryPageBank