Binary parsing

yaghmr · April 29, 2021, 8:08am

Hi all,
is there a library to do binary (ELF, PE, TE formats) parsing like pyelftools (GitHub - eliben/pyelftools: Parsing ELF and DWARF in Python) or pefile (GitHub - erocarrera/pefile: pefile is a Python module to read and work with PE (Portable Executable) files)?

straight-shoota · April 29, 2021, 9:54am

Not that I’m aware of.

The standard-library has non-public and incomplete bindings for debugging purposes.

github.com

crystal-lang/crystal/blob/master/src/crystal/elf.cr

module Crystal
  # :nodoc:
  #
  # ELF reader.
  #
  # Documentation:
  # - <http://www.sco.com/developers/gabi/latest/contents.html>
  struct ELF
    MAGIC = UInt8.slice(0x7f, 'E'.ord, 'L'.ord, 'F'.ord)

    enum Klass : UInt8
      ELF32 = 1
      ELF64 = 2
    end

    enum OSABI : UInt8
      SYSTEM_V = 0x00
      HP_UX    = 0x01
      NETBSD   = 0x02
      LINUX    = 0x03

This file has been truncated. show original

github.com

crystal-lang/crystal/blob/master/src/crystal/dwarf.cr

require "./dwarf/abbrev"
require "./dwarf/info"
require "./dwarf/line_numbers"
require "./dwarf/strings"

module Crystal
  # :nodoc:
  #
  # DWARF reader.
  #
  # Documentation:
  # - <http://dwarfstd.org>
  module DWARF
    def self.read_unsigned_leb128(io : IO)
      result = 0_u32
      shift = 0

      loop do
        byte = io.read_byte.not_nil!.to_i
        result |= (byte & 0x7f) << shift

This file has been truncated. show original

Maybe they could be useful as a starting point for a dedicated shard.

Topic		Replies	Views
Cannot parse DWARF sections properly Help & Support	3	489	October 20, 2019
Crystal Lib Support Community	5	496	August 29, 2022
Is it possible to build libraries? Help & Support	9	598	February 9, 2023
Debugger support Crystal Contrib	194	8225	February 27, 2024
Proposal: SSL Certificate Probing Crystal Contrib	4	124	February 10, 2024

Binary parsing

Related Topics