How does it assist with page fault error codes?

The skill provides a detailed breakdown of x86-64 page fault error bits (P, W, U, R, I) to help you determine if a fault was caused by a missing mapping or a protection violation.

What kind of memory issues does this skill help debug?

It is designed to handle page faults, double faults, frame allocation failures, page table mapping errors, heap corruption, and stack overflows within the Breenix kernel.

Is this skill specific to the Breenix operating system?

Yes, it is specifically tailored for the Breenix kernel's memory architecture, including its Rust-based frame allocator and page table management logic.

Can it help fix issues where syscalls cause a double fault?

Yes, it includes specific patterns for diagnosing 'Direct Execution' fixes, such as ensuring kernel stacks are correctly mapped in user-mode process page tables.

Breenix Memory Debugging

Name: Breenix Memory Debugging
Author: ryanbreen

byryanbreen

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Analytics & Monitoring

Diagnoses and resolves complex kernel memory issues including page faults, allocator failures, and page table errors within the Breenix operating system.

About

The Breenix Memory Debugging skill provides a systematic framework for identifying and fixing low-level memory management bugs in the Breenix kernel. It offers specialized guidance for troubleshooting physical frame allocation, virtual address mappings, heap corruption, and kernel stack integrity. By providing diagnostic patterns for common failures like double faults and protection violations, this skill helps developers navigate the intricacies of Rust-based OS development and ensure memory safety across process boundaries.

Key Features

4 GitHub stars
Systematic diagnosis of page faults and double faults
Detection of stack overflows and guard page violations
Verification of physical frame and heap allocator states
Validation of virtual address mappings and page table flags
Resolution patterns for process-specific page table conflicts

Use Cases

Identifying and fixing memory leaks in the kernel frame allocator
Resolving kernel panics caused by unmapped or protected memory access
Troubleshooting double faults during Ring 3 to Ring 0 transitions or context switches

About

Key Features

4 GitHub stars
Systematic diagnosis of page faults and double faults
Detection of stack overflows and guard page violations
Verification of physical frame and heap allocator states
Validation of virtual address mappings and page table flags
Resolution patterns for process-specific page table conflicts

Use Cases

Identifying and fixing memory leaks in the kernel frame allocator
Resolving kernel panics caused by unmapped or protected memory access
Troubleshooting double faults during Ring 3 to Ring 0 transitions or context switches