ghidra::JoinRecord Class Reference

A record describing how logical values are split. More...

#include <translate.hh>

Public Member Functions
int4	numPieces (void) const
	Get number of pieces in this record.
bool	isFloatExtension (void) const
	Does this record extend a float varnode.
const VarnodeData &	getPiece (int4 i) const
	Get the i-th piece.
const VarnodeData &	getUnified (void) const
	Get the Varnode whole.
Address	getEquivalentAddress (uintb offset, int4 &pos) const
	Given offset in join space, get equivalent address of piece. More...
bool	operator< (const JoinRecord &op2) const
	Compare records lexigraphically by pieces. More...

Private Attributes
vector< VarnodeData >	pieces
	All the physical pieces of the symbol.
VarnodeData	unified
	Special entry representing entire symbol in one chunk.

Friends
class	AddrSpaceManager

Detailed Description

A record describing how logical values are split.

The decompiler can describe a logical value that is stored split across multiple physical memory locations. This record describes such a split. The pieces must be listed from most significant to least significant.

Member Function Documentation

getEquivalentAddress()

Address ghidra::JoinRecord::getEquivalentAddress	(	uintb	offset,
		int4 &	pos
	)		const

Given offset in join space, get equivalent address of piece.

The join space range maps to the underlying pieces in a natural endian aware way. Given an offset in the range, figure out what address it is mapping to. The particular piece is passed back as an index, and the Address is returned.

Parameters

offset	is the offset within this range to map
pos	will hold the passed back piece index

Returns

the Address mapped to

Referenced by ghidra::JoinSpace::overlapJoin(), and ghidra::AddrSpaceManager::renormalizeJoinAddress().

operator<()

bool ghidra::JoinRecord::operator<

(

const JoinRecord &

op2

)

const

Compare records lexigraphically by pieces.

Allow sorting on JoinRecords so that a collection of pieces can be quickly mapped to its logical whole, specified with a join address

References pieces, ghidra::VarnodeData::size, and unified.

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The documentation for this class was generated from the following files:

• translate.hh
• translate.cc