readelf.js

A javascript ELF file reader.

Install

npm install readelf.js

Quick Start

This package accepts an elf file stored in Buffer and parse the file header, program header, and section header according to the ELF specification. An example usage:

const {ELFInfo} = require("readelf.js");
const fs = require("fs");

// elf Buffer
const elf_buffer = fs.readFileSync("./test/test_progs/helloworld.elf");

// Parse elf file
let elfinfo = new ELFInfo(elf_buffer);

ELFInfo is the top level structure holding elf information, it has the following field:

bit: "32" | "64";                   // 32/64-bit info
endianness: "little" | "big";       // Endianness info
fileHeader: ELFFileHeader;          // ELF file header
progHeader: ELFProgramHeader;       // ELF program header  
sectionHeader: ELFSectionHeader;    // ELF section header
readonly binary: Buffer;            // Reference to the elf binary buffer

ELFFileHeader contains the fields of file header.

ELFProgramHeader contains a program header table stored as array. Each entry in this table corresponds to a program header.

ELFSectionHeader similarly describes the section headers, with a table storing all the entries of section headers.