Class: PEdump::Loader::Section

Inherits:
Object
  • Object
show all
Defined in:
lib/pedump/loader/section.rb

Constant Summary collapse

EMPTY_DATA = 
''.force_encoding('binary')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(x = nil, args = {}) ⇒ Section

Returns a new instance of Section.



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# File 'lib/pedump/loader/section.rb', line 8

def initialize x = nil, args = {}
  if x.is_a?(PEdump::IMAGE_SECTION_HEADER)
    @hdr = x.dup
  end
  @data = EMPTY_DATA.dup
  @delta = args[:delta] || 0
  @deferred_load_io   = args[:deferred_load_io]
  @deferred_load_pos  = args[:deferred_load_pos]  || (@hdr && (@hdr.PointerToRawData - @delta))
  @deferred_load_size = args[:deferred_load_size] || (@hdr && @hdr.SizeOfRawData)
  @image_base = args[:image_base] || 0
end

Instance Attribute Details

#data ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 27

def data
  if @data.empty? && @deferred_load_io && @deferred_load_pos && @deferred_load_size.to_i > 0
    begin
      old_pos = @deferred_load_io.tell
      @deferred_load_io.seek @deferred_load_pos
      @data = @deferred_load_io.binmode.read(@deferred_load_size) || EMPTY_DATA.dup
    ensure
      if @deferred_load_io && old_pos
        @deferred_load_io.seek old_pos
        @deferred_load_io = nil # prevent read only on 1st access to data
      end
    end
  end
  @data
end

#hdr ⇒ Object

Returns the value of attribute hdr.



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# File 'lib/pedump/loader/section.rb', line 3

def hdr
  @hdr
end

Instance Method Details

#flags ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 24

def flags; @hdr.Characteristics; end

#flags=(f) ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 25

def flags= f; @hdr.Characteristics= f; end

#inspect ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 47

def inspect
  r = "#<Section"
  r << (" name=%-10s" % name.inspect) if name
  r << " va=%8x vsize=%8x rawsize=%8s" % [
    va, vsize,
    @data.size > 0 ? @data.size.to_s(16) : (@deferred_load_io ? "<defer>" : 0)
  ]
  r << (" dlpos=%8x" % @deferred_load_pos) if @deferred_load_pos
  r << (" delta=%3x" % @delta) if @delta != 0
  r << ">"
end

#name ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 20

def name;  @hdr.Name; end

#range ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 43

def range
  va...(va+vsize)
end

#rva ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 22

def rva ;  @hdr.VirtualAddress - @delta; end

#va ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 21

def va  ;  @hdr.VirtualAddress + @image_base - @delta; end

#vsize ⇒ Object 



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# File 'lib/pedump/loader/section.rb', line 23

def vsize; @hdr.VirtualSize; end