Introduction to ARM

CSE 598 AVR - Fall 2024.

Unlike amd64, ARM assembly (aarch64) is a RISC architecture with a small number of fast instructions. This module provides a short crash-course to get familiar with some of the key differences in aarch64. Drawing directly from the "Assembly Crash Course" module where possible to highlight differences.

The dojo box CPU is amd64 architecture. Working with a non-native architecture has its own unique challenges.

The simplest way to interact with these challenges is with a short pwntools script. A template you can use is shown below.

#!/usr/bin/env python3
from pwn import *
context.arch = 'aarch64'

asm_bytes = asm("""
  PUT YOUR AARCH64 ASSEMBLY HERE
  """)

with process('/challenge/run') as p:
  p.send(asm_bytes)
  p.stdin.close()
  p.interactive()

Set a register value.

Connect with SSH

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Set a register to a large value.

Connect with SSH

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Basic arithmetic.

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Efficient arithmetic.

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Perform a modulo operation.

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Perform bitshift operations.

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Loading and storing values.

Connect with SSH

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Loading and storing pairs.

Connect with SSH

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Working with the stack.

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Swapping register values.

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Compute a sum from an array.

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Efficiently compute a sum from an array.

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The branch instruction.

Connect with SSH

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Write an average function.

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

Write a fib function.

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

30-Day Scoreboard:

This scoreboard reflects solves for challenges in this module after the module launched in this dojo.

7-Day | 30-Day | All-Time

Rank		Hacker	Badges		Score