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Write Mini Disassembler: Decode Byte Stream Back to Mnemonics

hard4/8

Understand Instruction Encoding: Manually Encode 3 x86 Instructions Understand CISC vs RISC Trade-offs with Benchmarks

Language

Compiler

2.0s Limit 256MB

Implementation

Implement mini disassembler for toy ISA.

Requirements:

Define instruction format for toy ISA
Implement opcode decoding
Parse operands from bytes
Format output as assembly mnemonics
Handle variable-length instructions
Test with sample machine code
Show disassembled output

Why This Matters

This mini disassembler is a toy version of what objdump, Ghidra (the NSA's open-source reverse-engineering tool), and IDA Pro do at massive scale: turning a raw byte stream back into readable mnemonics for debugging and malware analysis. Variable-length instruction decoding, the hardest part of a real x86 disassembler, is exactly the complexity this task lets you practice on a simplified toy ISA first.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0