Implementation of the LoadImage interface using underlying data stored in an XML format. More...

#include <loadimage_xml.hh>

Inheritance diagram for LoadImageXml:

Public Member Functions
	LoadImageXml (const string &f, const Element *el)
	Constructor. More...

void	open (const AddrSpaceManager *m)
	Read XML tags into the containers. More...

void	clear (void)
	Clear out all the caches.

void	saveXml (ostream &s) const
	Save the image back out to an XML stream. More...

virtual void	loadFill (uint1 *ptr, int4 size, const Address &addr)
	Get data from the LoadImage. More...

virtual void	openSymbols (void) const
	Prepare to read symbols. More...

virtual bool	getNextSymbol (LoadImageFunc &record) const
	Get the next symbol record. More...

virtual void	getReadonly (RangeList &list) const
	Return list of readonly address ranges. More...

virtual string	getArchType (void) const
	Get a string indicating the architecture type. More...

virtual void	adjustVma (long adjust)
	Adjust load addresses with a global offset. More...

Public Member Functions inherited from LoadImage
	LoadImage (const string &f)
	LoadImage constructor. More...

virtual	~LoadImage (void)
	LoadImage destructor. More...

const string &	getFileName (void) const
	Get the name of the LoadImage. More...

virtual void	closeSymbols (void) const
	Stop reading symbols. More...

virtual void	openSectionInfo (void) const
	Prepare to read section info. More...

virtual void	closeSectionInfo (void) const
	Stop reading section info. More...

virtual bool	getNextSection (LoadImageSection &sec) const
	Get info on the next section. More...

uint1 *	load (int4 size, const Address &addr)
	Load a chunk of image. More...

Private Member Functions
void	pad (void)
	Make sure every chunk is followed by at least 512 bytes of pad.

Private Attributes
const Element *	rootel
	The root XML element.

string	archtype
	The architecture string.

const AddrSpaceManager *	manage
	Manager of addresses.

set< Address >	readonlyset
	Starting address of read-only chunks.

map< Address, vector< uint1 > >	chunk
	Chunks of image data, mapped by address.

map< Address, string >	addrtosymbol
	Symbols sorted by address.

map< Address, string >::const_iterator	cursymbol
	Current symbol being reported.

Additional Inherited Members
Protected Attributes inherited from LoadImage
string	filename
	Name of the loadimage.

Detailed Description

Implementation of the LoadImage interface using underlying data stored in an XML format.

The image data is stored in an XML file in a <binaryimage> file. The data is encoded in <bytechunk> and potentially <symbol> files.

Constructor & Destructor Documentation

LoadImageXml::LoadImageXml	(	const string &	f,
		const Element *	el
	)

Constructor.

Parameters

f	is the (path to the) underlying XML file
el	is the parsed form of the file

References archtype, LoadImage::filename, Element::getAttributeValue(), Element::getName(), manage, and rootel.

Member Function Documentation

void LoadImageXml::adjustVma ( long adjust )

virtual

Adjust load addresses with a global offset.

Most load image formats automatically encode information about the true loading address(es) for the data in the image. But if this is missing or incorrect, this routine can be used to make a global adjustment to the load address. Only one adjustment is made across all addresses in the image. The offset passed to this method is added to the stored or default value for any address queried in the image. This is most often used in a raw binary file format. In this case, the entire executable file is intended to be read straight into RAM, as one contiguous chunk, in order to be executed. In the absence of any other info, the first byte of the image file is loaded at offset 0. This method then would adjust the load address of the first byte.

Parameters

adjust is the offset amount to be added to default values

Implements LoadImage.

References AddrSpace::addressToByte(), addrtosymbol, chunk, and AddrSpace::getWordSize().

Referenced by getArchType().

virtual string LoadImageXml::getArchType ( void ) const

inlinevirtual

Get a string indicating the architecture type.

The load image class is intended to be a generic front-end to the large variety of load formats in use. This method should return a string that identifies the particular architecture this particular image is intended to run on. It is currently the responsibility of any derived LoadImage class to establish a format for this string, but it should generally contain some indication of the operating system and the processor.

Returns: the identifier string

Implements LoadImage.

References adjustVma(), and archtype.

bool LoadImageXml::getNextSymbol ( LoadImageFunc & record ) const

virtual

Get the next symbol record.

This method is used to read out an individual symbol record, LoadImageFunc, from the load image. Right now, the only information that can be read out are function starts and the associated function name. This method can be called repeatedly to iterate through all the symbols, until it returns false. This indicates the end of the symbols.

Parameters

record is a reference to the symbol record to be filled in

Returns: true if there are more records to read

Reimplemented from LoadImage.

References LoadImageFunc::address, addrtosymbol, cursymbol, and LoadImageFunc::name.

void LoadImageXml::getReadonly ( RangeList & list ) const

virtual

Return list of readonly address ranges.

This method should read out information about all address ranges within the load image that are known to be readonly. This method is intended to be called only once, so all information should be written to the passed RangeList object.

Parameters

list	is where readonly info will get put

Reimplemented from LoadImage.

References chunk, RangeList::insertRange(), and readonlyset.

void LoadImageXml::loadFill	(	uint1 *	ptr,
		int4	size,
		const Address &	addr
	)

virtual

Get data from the LoadImage.

This is the core routine of a LoadImage. Given a particular address range, this routine retrieves the exact byte values that are stored at that address when the executable is loaded into RAM. The caller must supply a pre-allocated array of bytes where the returned bytes should be stored. If the requested address range does not exist in the image, or otherwise can't be retrieved, this method throws an DataUnavailError exception.

Parameters

ptr	points to where the resulting bytes will be stored
size	is the number of bytes to retrieve from the image
addr	is the starting address of the bytes to retrieve

Implements LoadImage.

References chunk, Address::overlap(), and Address::printRaw().

void LoadImageXml::open ( const AddrSpaceManager * m )

Read XML tags into the containers.

Parameters

m	is for looking up address space

References addrtosymbol, chunk, Element::getAttributeName(), Element::getAttributeValue(), Element::getChildren(), Element::getContent(), Element::getName(), Element::getNumAttributes(), AddrSpaceManager::getSpaceByName(), manage, pad(), readonlyset, AddrSpace::restoreXmlAttributes(), rootel, and xml_readbool().

void LoadImageXml::openSymbols ( void ) const

virtual

Prepare to read symbols.

This routine should read in and parse any symbol information that the load image contains about executable. Once this method is called, individual symbol records are read out using the getNextSymbol() method.

Reimplemented from LoadImage.

References addrtosymbol, and cursymbol.

void LoadImageXml::saveXml ( ostream & s ) const

Save the image back out to an XML stream.

Write out the byte chunks and symbols as XML tags

Parameters

s	is the output stream

References addrtosymbol, archtype, chunk, and readonlyset.

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

loadimage_xml.hh
loadimage_xml.cc

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation