elfedit

Modify ELF file metadata

PARAMETERS

--architecture
Set the architecture field in the ELF header. arch specifies the target architecture (e.g., i386, x86_64, arm, etc.).

--entry-address

Set the entry point address to address. address is the address where execution begins when the program is loaded.

--output
Write the modified ELF file to file instead of overwriting the original.

--remove-section

    Remove the specified section from the ELF file.

--verify
    Verify that the specified is valid

--help
    Display help information and exit.

--version
    Display the version number and exit.

DESCRIPTION

The elfedit command is a utility used to update the ELF (Executable and Linkable Format) header of ELF object files and archives. It is primarily designed to modify ELF file attributes such as the architecture, entry point address, and other header fields without requiring a full recompilation or relinking. This is especially useful in situations where you need to adjust compatibility settings, change the interpretation of the file by the dynamic linker, or even alter how the operating system loads and executes the binary. It allows fine-grained control over ELF properties, useful in embedded systems development, cross-compilation environments, and legacy system maintenance. The tool's primary functions are related to updating the ELF header information, including flags, architecture, entry point, and other metadata that directs how the binary is processed.

Using elfedit directly modifies the target binary, so exercise caution and consider backing up your files before applying changes. Incorrect usage can render a binary unexecutable or lead to unexpected behavior.

CAVEATS

Modifying ELF files can lead to instability if the changes are not carefully considered. Always back up the original file before making changes. Incorrectly altering the entry point or architecture can render the file unusable.

SECURITY IMPLICATIONS

Tampering with ELF headers can be used maliciously to inject code, bypass security checks, or otherwise compromise the integrity of a program. elfedit should be used with caution, especially on binaries from untrusted sources. When using this command in automated processes, verify all steps to avoid unexpected outcomes.

HISTORY

elfedit is part of the GNU binutils suite, a collection of binary tools used for working with object files and executables. Its inclusion in the binutils package emphasizes its role in low-level binary manipulation, originating with the need to adjust ELF file attributes without recompiling or relinking. The command has evolved alongside the ELF format and binutils library, adapting to new architectures and evolving development practices.