Class ELF32FileReader

java.lang.Object

com.ibm.j9ddr.corereaders.elf.ELFFileReader

com.ibm.j9ddr.corereaders.elf.ELF32FileReader

public class ELF32FileReader
extends ELFFileReader

Field Summary

Fields declared in class ELFFileReader

ARCH_AARCH64, ARCH_AMD64, ARCH_ARM, ARCH_IA32, ARCH_IA64, ARCH_PPC32, ARCH_PPC64, ARCH_RISCV64, ARCH_S390, AT_ENTRY, AT_HWCAP, AT_NULL, AT_PLATFORM, DT_DEBUG, DT_NULL, DT_SONAME, DT_STRTAB, EI_NIDENT, ELF_NOTE_HEADER_SIZE, ELF_PRARGSZ, ELFCLASS32, ELFCLASS64, ELFDATA2LSB, ELFDATA2MSB, ET_CORE, ET_DYN, ET_EXEC, ET_HIOS, ET_HIPROC, ET_LOOS, ET_LOPROC, ET_NONE, ET_NUM, ET_REL, is, NT_AUXV, NT_HGPRS, NT_PRPSINFO, NT_PRSTATUS, sourceName

Modifier and Type	Field	Description
static final int	ARCH_AARCH64
static final int	ARCH_AMD64
static final int	ARCH_ARM
static final int	ARCH_IA32
static final int	ARCH_IA64
static final int	ARCH_PPC32
static final int	ARCH_PPC64
static final int	ARCH_RISCV64
static final int	ARCH_S390
static final int	AT_ENTRY
static final int	AT_HWCAP
static final int	AT_NULL
static final int	AT_PLATFORM
static final int	DT_DEBUG
static final int	DT_NULL
static final int	DT_SONAME
static final int	DT_STRTAB
static final int	EI_NIDENT
static final int	ELF_NOTE_HEADER_SIZE
static final int	ELF_PRARGSZ
static final int	ELFCLASS32
static final int	ELFCLASS64
static final byte	ELFDATA2LSB
static final byte	ELFDATA2MSB
static final short	ET_CORE
static final short	ET_DYN
static final short	ET_EXEC
static final int	ET_HIOS
static final int	ET_HIPROC
static final int	ET_LOOS
static final int	ET_LOPROC
static final short	ET_NONE
static final short	ET_NUM
static final short	ET_REL
protected ImageInputStream	is
static final int	NT_AUXV
static final int	NT_HGPRS
static final int	NT_PRPSINFO
static final int	NT_PRSTATUS
protected String	sourceName

Constructor Summary

Constructors

Constructor	Description
ELF32FileReader(File file, ByteOrder byteOrder)
ELF32FileReader(ImageInputStream in, long offset, long limit)

Method Summary

Modifier and Type	Method	Description
protected int	addressSizeBits()
protected long	padToWordBoundary(long l)
protected long	readElfWord()
protected com.ibm.j9ddr.corereaders.elf.Address	readElfWordAsAddress()
protected ProgramHeaderEntry	readProgramHeaderEntry()
protected List<com.ibm.j9ddr.corereaders.elf.ELFSymbol>	readSymbolsAt(com.ibm.j9ddr.corereaders.elf.SectionHeaderEntry entry)
boolean	validDump(byte[] data, long filesize)

Methods declared in class ELFFileReader

canResolveAddress, close, getByteOrder, getDynamicTableEntry, getELFFileReader, getELFFileReader, getELFFileReaderWithOffset, getFile, getMachineType, getMemoryRanges, getProgramHeaderEntries, getProperties, getSectionHeaderEntries, getSectionHeaderStringTable, getSourceName, getStream, getSymbols, is64Bit, isCompatibleWith, isELF, isExecutable, isTruncated, readByte, readBytes, readFully, readInt, readLong, readShort, readSONAME, readString, sectionHeaderMapsToProgramHeader, seek

Modifier and Type	Method	Description
boolean	canResolveAddress(long address)	Search the program header table to see whether it can successfully resolve an address into a file offset.
void	close()
ByteOrder	getByteOrder()
ProgramHeaderEntry	getDynamicTableEntry()	Search the program header table for the dynamic entry.
static ELFFileReader	getELFFileReader(File file)
static ELFFileReader	getELFFileReader(ImageInputStream in)
static ELFFileReader	getELFFileReaderWithOffset(ImageInputStream in, long offset, long limit)
File	getFile()	Returns the file from which this reader is reading.
short	getMachineType()
Collection<? extends IMemorySource>	getMemoryRanges(long baseAddress, List<com.ibm.j9ddr.corereaders.elf.SectionHeaderEntry> sectionHeaderEntries, Map<Long,String> sectionHeaderStringTable)	Iterate through the sections that were already loaded and create a list of memory source objects for them.
List<? extends ProgramHeaderEntry>	getProgramHeaderEntries()
Properties	getProperties()
List<com.ibm.j9ddr.corereaders.elf.SectionHeaderEntry>	getSectionHeaderEntries()
Map<Long,String>	getSectionHeaderStringTable()
String	getSourceName()
ImageInputStream	getStream()	Gets the data stream for this reader
List<? extends ISymbol>	getSymbols(long baseAddress, boolean useUnallocatedSections)	Obtain the symbols from a core reader, offset by baseAddress.
boolean	is64Bit()
boolean	isCompatibleWith(ELFFileReader otherReader)	Perform a quick check on two ELF readers to see if they represent the same library. otherReader is the one we hope is better that this reader.
static boolean	isELF(byte[] signature)
boolean	isExecutable()	Examine the ELF header to determine if this file is an executable or not.
boolean	isTruncated()	Are any parts of the core file known to be missing?
byte	readByte()
byte[]	readBytes(int len)
void	readFully(byte[] b, int off, int len)
int	readInt()
long	readLong()
short	readShort()
String	readSONAME(ELFFileReader coreFileReader)	Assume the entry given refers to a loaded library or program and find and return its name or null if it couldn't be determined.
String	readString()	Reads a string from the readers current position until it is terminated by a null (0) byte.
boolean	sectionHeaderMapsToProgramHeader(com.ibm.j9ddr.corereaders.elf.SectionHeaderEntry section)
void	seek(long pos)

Methods declared in class Object

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

Constructor Details

ELF32FileReader

public ELF32FileReader(File file,
 ByteOrder byteOrder)
                throws IOException,
InvalidDumpFormatException

Throws:

IOException

InvalidDumpFormatException

ELF32FileReader

public ELF32FileReader(ImageInputStream in,
 long offset,
 long limit)
                throws IOException,
InvalidDumpFormatException

Throws:

IOException

InvalidDumpFormatException

Method Details

validDump

public boolean validDump(byte[] data,
 long filesize)

readProgramHeaderEntry

protected ProgramHeaderEntry readProgramHeaderEntry()
                                             throws IOException

Throws:

IOException

padToWordBoundary

protected long padToWordBoundary(long l)

readElfWord

protected long readElfWord()
                    throws IOException

Throws:

IOException

readElfWordAsAddress

protected com.ibm.j9ddr.corereaders.elf.Address readElfWordAsAddress()
                                                              throws IOException

Throws:

IOException

addressSizeBits

protected int addressSizeBits()

readSymbolsAt

protected List<com.ibm.j9ddr.corereaders.elf.ELFSymbol> readSymbolsAt(com.ibm.j9ddr.corereaders.elf.SectionHeaderEntry entry)
                                                               throws IOException

Throws:

IOException