Class: SectionTable

Inherits:
Base
  • Object
show all
Defined in:
lib/elfcat/sectiontable.rb

Constant Summary collapse

SH = 
{
  sh_name:       [0x00, 4],
  sh_type:       [0x04, 4],
  sh_flags:      [0x08, 4],
  sh_addr:       [0x0C, 4],
  sh_offset:     [0x10, 4],
  sh_size:       [0x14, 4],
  sh_link:       [0x18, 4],
  sh_info:       [0x1C, 4],
  sh_addralign:  [0x20, 4],
  sh_entsize:    [0x24, 4]
}
LUT_SHN = 
{
  0 => 'SHN_UNDEF',
  0xff00 => 'SHN_LORESERVE',
  0xff00 => 'SHN_LOPROC',
  0xff00 => 'SHN_BEFORE',
  0xff01 => 'SHN_AFTER',
  0xff02 => 'SHN_AMD64_LCOMMON',
  0xff1f => 'SHN_HIPROC',
  0xff20 => 'SHN_LOOS',
  0xff3f => 'SHN_LOSUNW',
  0xff3f => 'SHN_SUNW_IGNORE',
  0xff3f => 'SHN_HISUNW',
  0xff3f => 'SHN_HIOS',
  0xfff1 => 'SHN_ABS',
  0xfff2 => 'SHN_COMMON',
  0xffff => 'SHN_XINDEX',
  0xffff => 'SHN_HIRESERVE',
}
LUT_SH_FLAGS = 
{
  0x1 => 'SHF_WRITE',
  0x2 => 'SHF_ALLOC',
  0x4 => 'SHF_EXECINSTR',
  0x10 => 'SHF_MERGE',
  0x20 => 'SHF_STRINGS',
  0x40 => 'SHF_INFO_LINK',
  0x80 => 'SHF_LINK_ORDER',
  0x100 => 'SHF_OS_NONCONFORMING',
  0x200 => 'SHF_GROUP',
  0x400 => 'SHF_TLS',
  0x0ff00000 => 'SHF_MASKOS',
  0x10000000 => 'SHF_AMD64_LARGE',
  0x40000000 => 'SHF_ORDERED',
  0x80000000 => 'SHF_EXCLUDE',
  0xf0000000 => 'SHF_MASKPROC'
}
LUT_SH_TYPE = 
{
  0 => 'SHT_NULL',
  1 => 'SHT_PROGBITS',
  2 => 'SHT_SYMTAB',
  3 => 'SHT_STRTAB',
  4 => 'SHT_RELA',
  5 => 'SHT_HASH',
  6 => 'SHT_DYNAMIC',
  7 => 'SHT_NOTE',
  8 => 'SHT_NOBITS',
  9 => 'SHT_REL',
  10 => 'SHT_SHLIB',
  11 => 'SHT_DYNSYM',
  14 => 'SHT_INIT_ARRAY',
  15 => 'SHT_FINI_ARRAY',
  16 => 'SHT_PREINIT_ARRAY',
  17 => 'SHT_GROUP',
  18 => 'SHT_SYMTAB_SHNDX',
  0x60000000 => 'SHT_LOOS',
  0x6fffffef => 'SHT_LOSUNW',
  0x6fffffef => 'SHT_SUNW_capchain',
  0x6ffffff0 => 'SHT_SUNW_capinfo',
  0x6ffffff1 => 'SHT_SUNW_symsort',
  0x6ffffff2 => 'SHT_SUNW_tlssort',
  0x6ffffff3 => 'SHT_SUNW_LDYNSYM',
  0x6ffffff4 => 'SHT_SUNW_dof',
  0x6ffffff5 => 'SHT_SUNW_cap',
  0x6ffffff6 => 'SHT_SUNW_SIGNATURE',
  0x6ffffff7 => 'SHT_SUNW_ANNOTATE',
  0x6ffffff8 => 'SHT_SUNW_DEBUGSTR',
  0x6ffffff9 => 'SHT_SUNW_DEBUG',
  0x6ffffffa => 'SHT_SUNW_move',
  0x6ffffffb => 'SHT_SUNW_COMDAT',
  0x6ffffffc => 'SHT_SUNW_syminfo',
  0x6ffffffd => 'SHT_SUNW_verdef',
  0x6ffffffe => 'SHT_SUNW_verneed',
  0x6fffffff => 'SHT_SUNW_versym',
  0x6fffffff => 'SHT_HISUNW',
  0x6fffffff => 'SHT_HIOS',
  0x70000000 => 'SHT_LOPROC',
  0x70000000 => 'SHT_SPARC_GOTDATA',
  0x70000001 => 'SHT_AMD64_UNWIND',
  0x7fffffff => 'SHT_HIPROC',
  0x80000000 => 'SHT_LOUSER',
  0xffffffff => 'SHT_HIUSER'
}

Instance Attribute Summary collapse

Attributes inherited from Base

#data

Instance Method Summary collapse

Methods inherited from Base

#[], #method_missing, #parse_slice, #parse_struct

Constructor Details

#initialize(_fh) ⇒ SectionTable

Returns a new instance of SectionTable.



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# File 'lib/elfcat/sectiontable.rb', line 101

def initialize _fh
  super()
  @index = Hash.new
  @addresses = Hash.new

  parse _fh
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Base

Instance Attribute Details

#addresses ⇒ Object (readonly)

Returns the value of attribute addresses.



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# File 'lib/elfcat/sectiontable.rb', line 2

def addresses
  @addresses
end

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/elfcat/sectiontable.rb', line 2

def index
  @index
end

Instance Method Details

#debug ⇒ Object 



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# File 'lib/elfcat/sectiontable.rb', line 124

def debug
  @data.each_with_index do |(k, d), i|
    print_debug_header(d.sh_real_name) if i % 64 == 0
    index_s = sprintf("%4d", k)
    sh_name_index_s = d.sh_real_name ? sprintf("%-16.16s", d.sh_real_name) : sprintf("%4X", d.sh_name)
    sh_type_enum_s = sprintf("%-8.8s", LUT_SH_TYPE[d.sh_type] || d.sh_type)
    sh_flag_enum_s = sprintf("%-8.8s", LUT_SH_FLAGS[d.sh_flags] || d.sh_flags)
    sh_mem_address_s = CuteHex.x d.sh_addr
    sh_elf_address_s = CuteHex.x d.sh_offset
    sh_size_s = sprintf("%8d", d.sh_size)

    puts "#{index_s} | #{sh_name_index_s} #{sh_type_enum_s} #{sh_flag_enum_s} | #{sh_mem_address_s} #{sh_elf_address_s} #{sh_size_s}"
  end
end

#get_by_index(_n) ⇒ Object 



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# File 'lib/elfcat/sectiontable.rb', line 120

def get_by_index _n
  return @data[@index[_n]]
end

#populate(_sn) ⇒ Object 



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# File 'lib/elfcat/sectiontable.rb', line 109

def populate _sn
  @data.each do |k, d|
    @data[k][:sh_real_name] = _sn[k]
    @index[_sn[k]] = k
    @addresses[d.sh_addr] = _sn[k]
    @addresses[d.sh_offset] = _sn[k]
  end

  return self
end