There is a new version.

elfmt

https://github.com/trimscash/elfmt

texthex

Read text section bytes and format it for shellcode(64bit ELF only)

Setup

git clone https://github.com/trimscash/texthex ~
cd texthex
cargo build -r
echo "export PATH=\$PATH:\$HOME/texthex/target/release" >> ~/.zshrc
source ~/.zshrc

and use it. Replace .zshrc with the one you are using

Usage

Read text section bytes and format it (64bit ELF only)
Without option, it just print text section bytes

Usage: texthex [OPTIONS] <FILE>

Arguments:
  <FILE>

Options:
  -s, --string-mode  Ex: \x55\x48\x89\xe5\x48
  -a, --array-mode   Ex: 0x55, 0x48, 0x89, 0xe5, 0x48
  -p, --python-mode  Ex: python3 -c 'import sys; sys.stdout.buffer.write(b"\x55\x48\x89\xe5\x48")'
  -w, --write-mode   Direct stdout. If you choose this option, other option will be ignore
  -h, --help         Print help

Example

$ texthex test.elf
554889e548c7c03b000000488d3c2524104000488d3425361040006a004889e20f05c9c32f62696e2f6361740063617400666c6167002d1040000000000031104000000000000000000000000000

$ texthex test.elf -asp
\x55\x48\x89\xe5\x48\xc7\xc0\x3b\x00\x00\x00\x48\x8d\x3c\x25\x24\x10\x40\x00\x48\x8d\x34\x25\x36\x10\x40\x00\x6a\x00\x48\x89\xe2\x0f\x05\xc9\xc3\x2f\x62\x69\x6e\x2f\x63\x61\x74\x00\x63\x61\x74\x00\x66\x6c\x61\x67\x00\x2d\x10\x40\x00\x00\x00\x00\x00\x31\x10\x40\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00

0x55, 0x48, 0x89, 0xe5, 0x48, 0xc7, 0xc0, 0x3b, 0x00, 0x00, 0x00, 0x48, 0x8d, 0x3c, 0x25, 0x24, 0x10, 0x40, 0x00, 0x48, 0x8d, 0x34, 0x25, 0x36, 0x10, 0x40, 0x00, 0x6a, 0x00, 0x48, 0x89, 0xe2, 0x0f, 0x05, 0xc9, 0xc3, 0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x63, 0x61, 0x74, 0x00, 0x63, 0x61, 0x74, 0x00, 0x66, 0x6c, 0x61, 0x67, 0x00, 0x2d, 0x10, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x31, 0x10, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

python3 -c 'import sys; sys.stdout.buffer.write(b"\x55\x48\x89\xe5\x48\xc7\xc0\x3b\x00\x00\x00\x48\x8d\x3c\x25\x24\x10\x40\x00\x48\x8d\x34\x25\x36\x10\x40\x00\x6a\x00\x48\x89\xe2\x0f\x05\xc9\xc3\x2f\x62\x69\x6e\x2f\x63\x61\x74\x00\x63\x61\x74\x00\x66\x6c\x61\x67\x00\x2d\x10\x40\x00\x00\x00\x00\x00\x31\x10\x40\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00")'

$ texthex test.elf -w
UH��H��;H�<%$�@H�4%6�@jH�����/bin/catcatflag-�@1�@