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Decompile a Simple Program with Ghidra

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Identify Function Prologues and Epilogues in Assembly Reverse Engineer a Password-Checking Binary

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Compiler

2.0s Limit 256MB

Submit and pass all tests to enable saving to GitHub.

Implementation

Write a C program with a simple algorithm and document what Ghidra's decompiler output would look like conceptually.

Requirements:

Implement a simple algorithm such as factorial or string reverse
Print documentation of the Ghidra workflow: loading, auto-analysis, finding entry point
Describe what the decompiled pseudocode would look like for your algorithm
Compare the decompiled output conceptually to the original source
Output must contain the keywords the test cases expect

Success Criteria:

Code compiles with gcc -Wall -Wextra
Output contains the expected substrings for each test case

Why This Matters

Ghidra, released by the NSA in 2019, is now the default free tool malware analysts and CTF players reach for instead of paying for IDA Pro, and its decompiler is what turns a raw disassembly dump into pseudocode readable enough to spot a factorial loop or a crypto routine in minutes. Following the _start to __libc_start_main to main chain is the same first move every analyst makes when opening an unfamiliar stripped binary.

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Validation Suite

main.c

Workspace 1.0

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