UDCLI(1)

📦
version 1.7.2+git20221013.5336633 · 3 versions
, in ubuntu stonking

💖 UDCLI — the udcli manual page, bestie edition 💖

okay so real quick, the vibe: this is UDCLI(1), a User Commands page, and it's literally about udcli, a CLI tool for quick disassembly of x86 and x86-64 instructions. Buckle up, it's giving "tiny tool, huge brain" energy 🧚✨

✨ NAME ✨

udcli — a CLI tool for quick disassembly of x86 and x86-64 instructions 🦋

🌸 SYNOPSIS 🌸

udcli [options] file

💅 DESCRIPTION 💅

So udcli is a command-line front-end to the Udis86 disassembler library, no cap. You feed it machine code and it prints out a disassembled representation of x86 or x86-64 instructions. That's the whole gig and honestly? Iconic. 👑

🎀 OPTIONS 🎀

  • -16 — sets the disassembly mode to 16 bits ✨
  • -32 — sets the disassembly mode to 32 bits. This is the default, the main character if u will 💅
  • -64 — sets the disassembly mode to 64 bits 🔥
  • -intel — use Intel (NASM-like) syntax for the output. Also the default 🫶
  • -att — use AT&T (GAS-like) syntax instead, for the GAS girlies 🌸
  • -v vendor — set the CPU vendor. vendor can be intel or amd, pick ur fighter 🥊
  • -o pc — set the program counter to pc. Default is 0 ⭐
  • -s n — skip n bytes before starting disassembly, like skipping the intro of a song 🙈
  • -c n — disassemble only n bytes, a lil snack-sized portion 💜
  • -x — read the input as whitespace-separated hexadecimal byte values, like this:

Example:

0f 01 ae 00
  • -noff — do NOT display instruction offsets 🙅
  • -nohex — do NOT display instruction byte encoding 🙅
  • -eflags — display info about EFLAGS usage 👑
  • -access — display operand access information 🔍
  • -implicit — display implicit registers that the instruction uses or modifies 🤫
  • -h — display help information 🫶
  • --version — display program version 🌈

🌟 EXAMPLE 🌟

Usage example, watch and learn bestie:

echo "65 67 89 87 76 65 54 56 78 89 09 00 90" | udcli -32 -x

Example output:

0000000080000800 656789877665     mov [gs:bx+0x6576], eax
0000000080000806 54               push esp
0000000080000807 56               push esi
0000000080000808 7889             js 0x80000793
000000008000080a 0900             or [eax], eax
000000008000080c 90               nop

like??? the bytes go in, the assembly comes out, that's just science 🧪✨

💜 AUTHORS 💜

This version of Udis86 is based on a fork of the original project by Willem (canihavesomecoffee) ☕

The original Udis86 project was written by Vivek Thampi 🙌

okay that's the whole page, mwah 💋 this udcli page came from the udis86 source, and if ur still here... go run it fr fr. no date on this one, she's timeless 💅🎀

UDCLI(1) — periodt. 💖

📦 where this page comes from