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

Class ElfDynamicTable

  • All Implemented Interfaces:
    ElfFileSection, StructConverter
    public class ElfDynamicTable
extends java.lang.Object
implements ElfFileSection
    If an object file participates in dynamic linking, its program header table will have an element of type PT_DYNAMIC. This "segment" contains the ".dynamic" section. A special symbol, _DYNAMIC, labels the section, which contains an array of the Elf32_Dyn or Elf64_Dyn structures.

    All address entries contained within this table should adjusted for pre-linking using ElfHeader.adjustAddressForPrelink(long). If a pre-link adjustment is not applicable, this adjustment will have no affect.

    • Constructor Detail

      • ElfDynamicTable

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

    • Method Detail

      • addDynamic

        public void addDynamic​(ElfDynamic dyn,
                       int index)
        Adds the new dynamic at the specified index.
        Parameters:
        dyn - the new dynamic
        index - the new index

      • getDynamics

        public ElfDynamic[] getDynamics()
        Returns an array of the dynamics defined this dynamic header.
        Returns:
        an array of the dynamics defined this dynamic header

      • getDynamics

        public ElfDynamic[] getDynamics​(long type)
        Returns an array of the dynamics defined this dynamic header with the specified type.
        Parameters:
        type - the desired dynamic type, e.g., DT_NEEDED
        Returns:
        an array of the dynamics defined this dynamic header

      • getDynamics

        public ElfDynamic[] getDynamics​(ElfDynamicType type)
        Returns an array of the dynamics defined this dynamic header with the specified (enum) type.
        Parameters:
        type - the desired dynamic type, e.g., DT_NEEDED
        Returns:
        an array of the dynamics defined this dynamic header

      • setDynamicValue

        public void setDynamicValue​(long type,
                            long value)
        Sets the dynamic with the specified type to the specified value.
        Parameters:
        type - the dynamic type
        value - the new value

      • setDynamicValue

        public void setDynamicValue​(ElfDynamicType type,
                            long value)
        Sets the dynamic with the specified (enum) type to the specified value.
        Parameters:
        type - the dynamic (enum) type
        value - the new value

      • getDynamicValue

        public long getDynamicValue​(long type)
                     throws NotFoundException
        Returns the value of the specified dynamic type.
        Parameters:
        type - the dynamic type
        Returns:
        the dynamic value
        Throws:
        NotFoundException

      • containsDynamicValue

        public boolean containsDynamicValue​(ElfDynamicType type)
        Returns true if the specified dynamic (enum) type has a value.
        Parameters:
        type - the dynamic (enum) type
        Returns:
        true if dynamic value exists

      • containsDynamicValue

        public boolean containsDynamicValue​(long type)
        Returns true if the specified dynamic type has a value.
        Parameters:
        type - the dynamic type
        Returns:
        true if dynamic value exists

      • getDynamicValue

        public long getDynamicValue​(ElfDynamicType type)
                     throws NotFoundException
        Returns the value of the specified dynamic (enum) type.
        Parameters:
        type - the dynamic (enum) type
        Returns:
        the dynamic value
        Throws:
        NotFoundException

      • getFileOffset

        public long getFileOffset()
        Description copied from interface: ElfFileSection
        Offset within file where section bytes are specified
        Specified by:
        getFileOffset in interface ElfFileSection
        Returns:
        offset within file where section bytes are specified

      • getAddressOffset

        public long getAddressOffset()
        Description copied from interface: ElfFileSection
        Preferred memory address offset where data should be loaded. The returned offset will already have the prelink adjustment applied, although will not reflect any change in the image base.
        Specified by:
        getAddressOffset in interface ElfFileSection
        Returns:
        default memory address offset where data should be loaded

      • toDataType

        public DataType toDataType()
                    throws DuplicateNameException,
                           java.io.IOException
        Description copied from interface: StructConverter
        Returns a structure datatype representing the contents of the implementor of this interface.

        For example, given: 

         class A {
     int foo;
     double bar;
 }

        The return value should be a structure data type with two data type components; an INT and a DOUBLE. The structure should contain field names and, if possible, field comments.

        Specified by:
        toDataType in interface StructConverter
        Returns:
        returns a structure datatype representing the implementor of this interface
        Throws:
        DuplicateNameException - when a datatype of the same name already exists
        java.io.IOException
        See Also:
        StructureDataType

      • getLength

        public long getLength()
        Description copied from interface: ElfFileSection
        Length of file section in bytes
        Specified by:
        getLength in interface ElfFileSection
        Returns:
        length of file section in bytes

      • getEntrySize

        public int getEntrySize()
        Description copied from interface: ElfFileSection
        Size of each structured entry in bytes
        Specified by:
        getEntrySize in interface ElfFileSection
        Returns:
        entry size or -1 if variable

      • toBytes

        public byte[] toBytes​(DataConverter dc)
               throws java.lang.ArrayIndexOutOfBoundsException
        Get this dynamic table data as a byte array
        Parameters:
        dc - data converter
        Returns:
        data array
        Throws:
        java.lang.ArrayIndexOutOfBoundsException