Class: Elf::GNU::SymbolVersionDef

Inherits:
Section
  • Object
show all
Defined in:
lib/elf/gnu.rb

Constant Summary collapse

FlagBase = 
0x0001
FlagWeak = 
0x0002

Constants inherited from Section

Section::Abs, Section::Common, Section::FlagsToChars, Section::OsSpecific, Section::ProcSpecific, Section::Reserved, Section::SunW, Section::SunWIgnore, Section::Undef, Section::XIndex

Instance Attribute Summary

Attributes inherited from Section

#addr, #addralign, #entsize, #file, #index, #info, #offset, #size, #type

Instance Method Summary collapse

Methods inherited from Section

#==, #flags, #flags_i, #flags_s, #initialize, #link, #load, #name, read, #summary

Constructor Details

This class inherits a constructor from Elf::Section

Instance Method Details

#[](idx) ⇒ Object 



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# File 'lib/elf/gnu.rb', line 100

def [](idx)
  load unless @defined_versions

  @defined_versions[idx]
end

#count ⇒ Object 



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# File 'lib/elf/gnu.rb', line 94

def count
  load unless @defined_versions

  @defined_versions.size
end

#each_version(&block) ⇒ Object

Allow to iterate over all the versions defined in the ELF file.



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# File 'lib/elf/gnu.rb', line 108

def each_version(&block)
  load unless @defined_versions

  @defined_versions.each_value(&block)
end

#load_internal ⇒ Object 



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# File 'lib/elf/gnu.rb', line 59

def load_internal
  link.load # do this now for safety

  @defined_versions = {}
  entry_off = @offset
  loop do
    @file.seek(entry_off)

    entry = {}
    version = @file.read_half
    raise SymbolVersionUnknown.new(version) if version != 1
    entry[:flags] = @file.read_half
    ndx = @file.read_half
    aux_count = @file.read_half
    entry[:hash] = @file.read_word
    name_off = entry_off + @file.read_word
    next_entry_off = @file.read_word

    entry[:names] = []
    for i in 1..aux_count
      @file.seek(name_off)
      entry[:names] << link[@file.read_word]
      next_name_off = @file.read_word
      break unless next_name_off != 0
      name_off += next_name_off
    end

    @defined_versions[ndx] = entry

    break unless next_entry_off != 0

    entry_off += next_entry_off
  end
end