Package ghidra.pcode.emu.jit.gen

Record Class FieldForArrDirect

java.lang.Object

java.lang.Record

ghidra.pcode.emu.jit.gen.FieldForArrDirect

Record Components:

address - the address contained by the page to pre-fetch

All Implemented Interfaces:

FieldReq, InstanceFieldReq

public record FieldForArrDirect(Address address)
extends Record
implements InstanceFieldReq

A field request for a pre-fetched page from the JitBytesPcodeExecutorStatePiece.JitBytesPcodeExecutorStateSpace.

The field is used for direct memory accesses. For those, the address space and fixed address is given in the p-code, so we are able to pre-fetch the page and access it directly at run time.

Constructor Summary

Constructors

Constructor	Description
FieldForArrDirect(Address address)	Creates an instance of a FieldForArrDirect record class.

Method Summary

Modifier and Type	Method	Description
Address	address()	Returns the value of the address record component.
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
void	generateInitCode(JitCodeGenerator gen, org.objectweb.asm.ClassVisitor cv, org.objectweb.asm.MethodVisitor iv)	Emit the field declaration and its initialization bytecode
void	generateLoadCode(JitCodeGenerator gen, org.objectweb.asm.MethodVisitor rv)	Emit code to load the field onto the JVM stack
final int	hashCode()	Returns a hash code value for this object.
String	name()	Derive a suitable name for the field
final String	toString()	Returns a string representation of this record class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

FieldForArrDirect

public FieldForArrDirect(Address address)

Creates an instance of a FieldForArrDirect record class.

Parameters:

address - the value for the address record component

Method Details

name

public String name()

Description copied from interface: FieldReq

Derive a suitable name for the field

Specified by:

name in interface FieldReq

Returns:

the name

generateInitCode

public void generateInitCode(JitCodeGenerator gen,
 org.objectweb.asm.ClassVisitor cv,
 org.objectweb.asm.MethodVisitor iv)

Emit the field declaration and its initialization bytecode

The declaration is emitted into the class definition, and the initialization code is emitted into the class constructor.

Consider the address ram:00600000. The declaration is equivalent to:

 private final byte[] arrDir_ram_600000;
 

And the initialization is equivalent to:

 arrDir_ram_600000 =
        state.getForSpace(ADDRESS_FACTORY.getAddressSpace(ramId)).getDirect(0x600000);
 

Specified by:

generateInitCode in interface InstanceFieldReq

Parameters:

gen - the code generator

cv - the visitor for the class definition

iv - the visitor for the class constructor

generateLoadCode

public void generateLoadCode(JitCodeGenerator gen,
 org.objectweb.asm.MethodVisitor rv)

Description copied from interface: FieldReq

Emit code to load the field onto the JVM stack

Specified by:

generateLoadCode in interface FieldReq

Parameters:

gen - the code generator

rv - the visitor often for the run method, but could be the static initializer or constructor

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

address

public Address address()

Returns the value of the address record component.

Returns:

the value of the address record component