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asm-testing

Validate and debug hand-written assembly code for x86-64 and ARM64.

15|1|Updated Feb 12, 2026
Search Tags:#testing#performance#debugging#arm64#assembly#abi#x86-64
One-click install
npx skills add https://github.com/AeonDave/malskill --skill asm-testing
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: asm-testing
Source: https://github.com/AeonDave/malskill/tree/main/programming/asm-testing
Command: npx skills add https://github.com/AeonDave/malskill --skill asm-testing

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a structured workflow to ensure the correctness and performance of hand-written assembly code, catching errors early in the development cycle.

Core Features & Use Cases

  • ABI Compliance: Ensures assembly functions adhere to calling conventions to prevent runtime crashes.
  • Structural Analysis: Uses objdump to verify function prologues, epilogues, and symbol exports.
  • Unit Testing: Facilitates writing C harnesses to test assembly functions with various inputs.
  • Debugging: Integrates with GDB/LLDB for step-by-step execution and register inspection.
  • Performance Measurement: Enables cycle-accurate measurement of assembly function execution time.
  • Use Case: You've written a performance-critical function in x86-64 assembly and need to rigorously verify its correctness and measure its cycle count before integrating it into a larger C project.

Quick Start

Use the asm-testing skill to verify the ABI compliance and structural integrity of your new 'my_fn.o' assembly object file.

Frequently Asked Questions about asm-testing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I verify hand-written assembly code for ABI compliance?▼

To verify hand-written assembly code for ABI compliance, you can use a structured workflow that checks function prologues, epilogues, and symbol exports to ensure adherence to calling conventions and prevent runtime crashes.

What is the best way to debug x86-64 assembly functions?▼

Debugging x86-64 assembly functions is best handled by integrating GDB or LLDB for step-by-step execution and register inspection, allowing you to identify logical and structural errors early in the development cycle.

How do I test assembly functions using a C harness?▼

You can test assembly functions using a C harness by writing unit tests that call the assembly code with various inputs, verifying its correctness before integrating it into a larger C project.

Can I measure cycle-accurate performance for ARM64 assembly code?▼

Yes, you can measure cycle-accurate performance for ARM64 assembly code by using a multi-phase workflow that calculates the exact cycle count of function execution time to ensure optimal performance.

Do I need specific toolchain versions for assembly structural analysis?▼

Yes, assembly structural analysis requires specific toolchain versions for tools like GDB, LLDB, GCC, Clang, NASM, and objdump to ensure accurate verification of function structures and symbols.

Why does my assembly code crash when called from a C program?▼

Your assembly code likely crashes due to ABI non-compliance, meaning it fails to adhere to standard calling conventions; performing an ABI compliance check can identify and resolve these structural mismatches.

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