Class: MachO::Section

Inherits:
MachOStructure show all
Defined in:
lib/macho/sections.rb

Overview

Represents a section of a segment for 32-bit architectures.

Direct Known Subclasses

Section64

Constant Summary collapse

FORMAT = 
"a16a16VVVVVVVVV"
SIZEOF = 
68

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from MachOStructure

bytesize, new_from_bin

Constructor Details

#initialize(sectname, segname, addr, size, offset, align, reloff, nreloc, flags, reserved1, reserved2) ⇒ Section

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Section.



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# File 'lib/macho/sections.rb', line 107

def initialize(sectname, segname, addr, size, offset, align, reloff,
		nreloc, flags, reserved1, reserved2)
	@sectname = sectname
	@segname = segname
	@addr = addr
	@size = size
	@offset = offset
	@align = align
	@reloff = reloff
	@nreloc = nreloc
	@flags = flags
	@reserved1 = reserved1
	@reserved2 = reserved2
end

Instance Attribute Details

#addr ⇒ Fixnum (readonly)

Returns the memory address of the section.

Returns:

  • (Fixnum) —

    the memory address of the section



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# File 'lib/macho/sections.rb', line 77

def addr
  @addr
end

#align ⇒ Fixnum (readonly)

Returns the section alignment (power of 2) of the section.

Returns:

  • (Fixnum) —

    the section alignment (power of 2) of the section



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# File 'lib/macho/sections.rb', line 86

def align
  @align
end

#flags ⇒ Fixnum (readonly)

Returns flags for type and addrributes of the section.

Returns:

  • (Fixnum) —

    flags for type and addrributes of the section



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# File 'lib/macho/sections.rb', line 95

def flags
  @flags
end

#nreloc ⇒ Fixnum (readonly)

Returns the number of relocation entries.

Returns:

  • (Fixnum) —

    the number of relocation entries



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# File 'lib/macho/sections.rb', line 92

def nreloc
  @nreloc
end

#offset ⇒ Fixnum (readonly)

Returns the file offset of the section.

Returns:

  • (Fixnum) —

    the file offset of the section



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# File 'lib/macho/sections.rb', line 83

def offset
  @offset
end

#reloff ⇒ Fixnum (readonly)

Returns the file offset of the section's relocation entries.

Returns:

  • (Fixnum) —

    the file offset of the section's relocation entries



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# File 'lib/macho/sections.rb', line 89

def reloff
  @reloff
end

#reserved1 ⇒ void (readonly)

This method returns an undefined value.

Returns reserved (for offset or index).



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# File 'lib/macho/sections.rb', line 98

def reserved1
  @reserved1
end

#reserved2 ⇒ void (readonly)

This method returns an undefined value.

Returns reserved (for count or sizeof).



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# File 'lib/macho/sections.rb', line 101

def reserved2
  @reserved2
end

#sectname ⇒ String (readonly)

Returns the name of the section, including null pad bytes.

Returns:

  • (String) —

    the name of the section, including null pad bytes



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# File 'lib/macho/sections.rb', line 71

def sectname
  @sectname
end

#segname ⇒ String (readonly)

Returns the name of the segment's section, including null pad bytes.

Returns:

  • (String) —

    the name of the segment's section, including null pad bytes



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# File 'lib/macho/sections.rb', line 74

def segname
  @segname
end

#size ⇒ Fixnum (readonly)

Returns the size, in bytes, of the section.

Returns:

  • (Fixnum) —

    the size, in bytes, of the section



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# File 'lib/macho/sections.rb', line 80

def size
  @size
end

Instance Method Details

#flag?(flag) ⇒ Boolean

Returns true if flag is present in the section's flag field.

Examples:

puts "this section is regular" if sect.flag?(:S_REGULAR)

Parameters:

  • flag (Symbol) —

    a section flag symbol

Returns:

  • (Boolean) —

    true if flag is present in the section's flag field



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# File 'lib/macho/sections.rb', line 136

def flag?(flag)
	flag = SECTION_FLAGS[flag]
	return false if flag.nil?
	flags & flag == flag
end

#section_name ⇒ String

Returns the section's name, with any trailing NULL characters removed.

Returns:

  • (String) —

    the section's name, with any trailing NULL characters removed



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# File 'lib/macho/sections.rb', line 123

def section_name
	@sectname.delete("\x00")
end

#segment_name ⇒ String

Returns the parent segment's name, with any trailing NULL characters removed.

Returns:

  • (String) —

    the parent segment's name, with any trailing NULL characters removed



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# File 'lib/macho/sections.rb', line 128

def segment_name
	@segname.delete("\x00")
end