Package ghidra.app.util.bin.format.elf

Class ElfDynamic

java.lang.Object

ghidra.app.util.bin.format.elf.ElfDynamic

All Implemented Interfaces:

ByteArrayConverter

public class ElfDynamic
extends java.lang.Object
implements ByteArrayConverter

A class to represent the Elf32_Dyn data structure.

 typedef  int32_t  Elf32_Sword;
 typedef uint32_t  Elf32_Word;
 typedef uint32_t  Elf32_Addr;
 
  typedef struct {
      Elf32_Sword     d_tag;
      union {
          Elf32_Word  d_val;
          Elf32_Addr  d_ptr;
      } d_un;
  } Elf32_Dyn;
 
 typedef   int64_t  Elf64_Sxword;
 typedef  uint64_t  Elf64_Xword;
 typedef  uint64_t  Elf64_Addr;
 
 typedef struct {
     Elf64_Sxword          d_tag;     //Dynamic entry type
     union {
         Elf64_Xword d_val;     //Integer value
         Elf64_Addr  d_ptr;     //Address value
     } d_un;
 } Elf64_Dyn;
 
 

Constructor Summary

Constructors

Constructor	Description
ElfDynamic()	DO NOT USE THIS CONSTRUCTOR, USE create*(GenericFactory ...) FACTORY METHODS INSTEAD.
ElfDynamic(int tag, long value, ElfHeader elf)	Constructs a new ELF dynamic with the specified tag and value.
ElfDynamic(ElfDynamicType tag, long value, ElfHeader elf)	Constructs a new ELF dynamic with the specified (enum) tag and value.

Method Summary

Modifier and Type	Method	Description
static ElfDynamic	createElfDynamic(FactoryBundledWithBinaryReader reader, ElfHeader elf)
int	getTag()	Returns the value that controls the interpretation of the the d_val and/or d_ptr.
java.lang.String	getTagAsString()	A convenience method for getting a string representing the d_tag value.
ElfDynamicType	getTagType()	Returns the enum value that controls the interpretation of the the d_val and/or d_ptr (or null if unknown).
long	getValue()	Returns the object whose integer values represent various interpretations.
void	setValue(int value)	Sets the value of this dynamic.
void	setValue(long value)	Sets the value of this dynamic.
int	sizeof()	Returns the size in bytes of this object.
byte[]	toBytes(DataConverter dc)	Returns a byte array representing this implementor of this interface.
java.lang.String	toString()
void	write(byte[] data, int offset, DataConverter dc)

Methods inherited from class java.lang.Object

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

Constructor Detail

ElfDynamic

public ElfDynamic()

DO NOT USE THIS CONSTRUCTOR, USE create*(GenericFactory ...) FACTORY METHODS INSTEAD.

ElfDynamic

public ElfDynamic(int tag,
                  long value,
                  ElfHeader elf)

Constructs a new ELF dynamic with the specified tag and value.

Parameters:

tag - the tag (or type) of this dynamic

value - the value (or pointer) of this dynamic

is32bit - true if this object is a 32-bit dynamic, false if 64-bit dynamic

ElfDynamic

public ElfDynamic(ElfDynamicType tag,
                  long value,
                  ElfHeader elf)

Constructs a new ELF dynamic with the specified (enum) tag and value.

Parameters:

tag - the (enum) tag (or type) of this dynamic

value - the value (or pointer) of this dynamic

is32bit - true if this object is a 32-bit dynamic, false if 64-bit dynamic

Method Detail

createElfDynamic

public static ElfDynamic createElfDynamic(FactoryBundledWithBinaryReader reader,
                                          ElfHeader elf)
                                   throws java.io.IOException

Throws:

java.io.IOException

getTag

public int getTag()

Returns the value that controls the interpretation of the the d_val and/or d_ptr.

Returns:

the tag (or type) of this dynamic

getTagType

public ElfDynamicType getTagType()

Returns the enum value that controls the interpretation of the the d_val and/or d_ptr (or null if unknown).

Returns:

the enum tag (or type) of this dynamic or null if unknown

getValue

public long getValue()

Returns the object whose integer values represent various interpretations. For example, if d_tag == DT_SYMTAB, then d_val holds the address of the symbol table. But, if d_tag == DT_SYMENT, then d_val holds the size of each symbol entry.

Returns:

the Elf32_Word object represent integer values with various interpretations

setValue

public void setValue(long value)

Sets the value of this dynamic. The value could be an address or a number.

Parameters:

value - the new value dynamic

setValue

public void setValue(int value)

Sets the value of this dynamic. The value could be an address or a number.

Parameters:

value - the new value dynamic

getTagAsString

public java.lang.String getTagAsString()

A convenience method for getting a string representing the d_tag value. For example, if d_tag == DT_SYMTAB, then this method returns "DT_SYMTAB".

Returns:

a string representing the d_tag value

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toBytes

public byte[] toBytes(DataConverter dc)

Description copied from interface: ByteArrayConverter

Returns a byte array representing this implementor of this interface.

Specified by:

toBytes in interface ByteArrayConverter

Parameters:

dc - the data converter to use

Returns:

a byte array representing this object

See Also:

ByteArrayConverter.toBytes(ghidra.util.DataConverter)

write

public void write(byte[] data,
                  int offset,
                  DataConverter dc)
           throws java.lang.ArrayIndexOutOfBoundsException

Throws:

java.lang.ArrayIndexOutOfBoundsException

sizeof

public int sizeof()

Returns the size in bytes of this object.