Package com.pnfsoftware.jeb.core.units.code.asm.processor.memory

Class DirectEncodedMemoryArea

java.lang.Object

com.pnfsoftware.jeb.core.units.code.asm.processor.memory.AbstractEncodedMemoryArea

com.pnfsoftware.jeb.core.units.code.asm.processor.memory.DirectEncodedMemoryArea

All Implemented Interfaces:

IEncodedMemoryArea

public class DirectEncodedMemoryArea
extends AbstractEncodedMemoryArea

Represent a memory Area in code. A memory area is composed of an index and a length

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DirectEncodedMemoryArea(int index, int length)

Method Summary

Modifier and Type	Method	Description
long	decode(byte[] code)	Decode the area from instruction bytes.
static int	decodeInt(int index, int length, byte[] code)	Decode bits from instruction bytes.
static DirectEncodedMemoryArea	get(int index, int length)	Build a DirectEncodedMemoryArea from index and length.
int	getIndex()	Retrieve the bit index of this area.
int	getLength()	Retrieve the encoded area length in bits.
static DirectEncodedMemoryArea	getThumb2(int index, int zone, int length)	Build an DirectEncodedMemoryArea for Thumb-2
EncodedMemoryAreaList	shift(int shift)	Shift this encoded memory area to the left.

Methods inherited from class com.pnfsoftware.jeb.core.units.code.asm.processor.memory.AbstractEncodedMemoryArea

decodeInt

Methods inherited from class java.lang.Object

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

Constructor Details

DirectEncodedMemoryArea

protected DirectEncodedMemoryArea(int index,
 int length)

Method Details

getIndex

public int getIndex()

Retrieve the bit index of this area.

Returns:

bit index, where 0 represents the least significant bit

getLength

public int getLength()

Description copied from interface: IEncodedMemoryArea

Retrieve the encoded area length in bits.

Returns:

length in bits

get

public static DirectEncodedMemoryArea get(int index,
 int length)

Build a DirectEncodedMemoryArea from index and length. Index 0 represents the least significant bit.

Parameters:

index - bit index

length - length in bits

Returns:

encoded memory area

decodeInt

public static int decodeInt(int index,
 int length,
 byte[] code)

Decode bits from instruction bytes.

Parameters:

index - bit index

length - length in bits

code - instruction bytes

Returns:

decoded value

getThumb2

public static DirectEncodedMemoryArea getThumb2(int index,
 int zone,
 int length)

Build an DirectEncodedMemoryArea for Thumb-2

Parameters:

index - index in the 16-bit area

zone - 0 for the LSB side, 1 for the MSB

length - length in bits

Returns:

encoded memory area

decode

public long decode(byte[] code)

Description copied from interface: IEncodedMemoryArea

Decode the area from instruction bytes.

Parameters:

code - instruction bytes

Returns:

decoded value

shift

public EncodedMemoryAreaList shift(int shift)

Shift this encoded memory area to the left.

Specified by:

shift in interface IEncodedMemoryArea

Overrides:

shift in class AbstractEncodedMemoryArea

Parameters:

shift - shift amount in bits

Returns:

shifted encoded memory area