elb-cli

Command-line utility for ELF files with the following features.

• Inspect ELF contents.
• Prints ELF dependencies.
• Patch RPATH, RUNPATH and program interpreter.
• Relocate ELF files together with their dependencies to a different system (this involves patching RUNPATH and program interpreter).

Based on elb crate.

Installation

cargo install elb-cli
# symlink `elb-cli` to `elb`
ln -s $(which elb-cli) $(dirname $(which elb-cli))/elb

Usage

Show header/sections/segments/tables

$ elb show -t header /bin/sh
Class: Elf64
Byte order: LittleEndian
OS ABI: Sysv
ABI version: 0
File type: Executable
Machine: X86_64
Flags: 0x0
Entry point: 0x41fa60
Program header: 0x40..0x318
Section header: 0xdcce8..0xdd3e8

$ elb show -t all /bin/sh
...

Show dependencies

$ elb deps -f list --names-only /bin/ls
libgcc_s.so.1
ld-linux-x86-64.so.2
libc.so.6
libcap.so.2.64

$ elb deps -f tree --names-only /bin/ls
ls
 ├── libcap.so.2.64
 │   ├── libgcc_s.so.1
 │   │   ╰── libc.so.6
 │   │       ╰── ld-linux-x86-64.so.2
 │   ├── libc.so.6
 │   │   ╰── ld-linux-x86-64.so.2
 │   ╰── ld-linux-x86-64.so.2
 ├── libc.so.6
 │   ╰── ld-linux-x86-64.so.2
 ╰── ld-linux-x86-64.so.2

Patch ELF

$ elb patch \
    --set-interpreter /chroot/lib64/ld-linux-x86-64.so.2 \
    --set-dynamic RUNPATH=/chroot/lib64:/chroot/usr/lib64 \
    /chroot/bin/ls