https://github.com/hiejulia/kernel-project

Kernel development project
https://github.com/hiejulia/kernel-project

audio-driver buffer bus darwin driver kernel-development linux linux-kernel queue thunderbolt unix unix-shell usb

Last synced: 6 months ago
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Kernel development project

• Host: GitHub
• URL: https://github.com/hiejulia/kernel-project
• Owner: hiejulia
• Created: 2020-03-22T08:06:23.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-06-13T10:49:14.000Z (over 5 years ago)
• Last Synced: 2025-02-08T21:46:18.969Z (8 months ago)
• Topics: audio-driver, buffer, bus, darwin, driver, kernel-development, linux, linux-kernel, queue, thunderbolt, unix, unix-shell, usb
• Language: C++
• Homepage:
• Size: 317 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Kernel development project 

- Implement processes, thread, scheduler, synchronisation, VM, Virtual file system , Unix OS

- Use QEMU emulator to run and GDB for debugging 

- Kernel module which 

- Develop filesystem in linux kernel to detect files containing bad patterns 

- System call handle malicious cases and prevents memory leaks and unnessary memory allocation

- FIle encrytion, decryption in Linux using CryptoAPI

- Kernel locking, Producer-Consumer, Netlink sockets and throttling 

- Developed a kernel module which when loaded instantiates a producer-consumer work queue and a kernel thread to process the queue. The queue contains various job requests such as  Contenation of multiple files etc.

- Decipher process scheduling and understand effective capacity utilization under general and real-time dispositions

- Understand concurrent execution on SMP platforms through kernel synchronization and locking techniques

- Clock subsystem

- Process communication techniques through signals and IPC mechanisms

- Kernal Audio driver 

# Scripting 

+ Cryptographic Hash Function for random data & String manipulation 

+ Transform data / data process/ reporting

    + Cut and awk script : open network port 

    + sort & uniq

    + parsing log file 

+ Network scripting & automation of distributed system 

    + config a mini network and script for remote system 

+ test env : Vagrant & Virtual box Centos7 `vagrant up`

# Mac OSX and ioS 

+ FreeBSD 

+ kernel extension 

+ The XNU kernel (doc : /docs/xnu-kernel.md)

# Hardware & firmware 

+ Extensible firmware interface 

+ hardware

+ Kernel space : XNU kernel: BSD, Mach, IO 

+ Quartz, OpenGL, Core Animation, Core Image, Audio , Text, Quicktime

+ XNU kernel 

+ Kernel extension 

+ kernel address space management 

+ Memory Allocation in Mach 

`kern_return_t kmem_alloc(vm_map_t map, vm_offset_t *addrp, vm_size_t  size);

kern_return_t kmem_alloc_contig(vm_map_t map, vm_offset_t *addrp,

                                vm_size_t size, vm_offset_t mask, int flags);

void kmem_free(vm_map_t map, vm_offset_t addr, vm_size_t size);`

+ BSD layer 

+ Network kernel extension 

+ Virtual file syste 

+ Unified Buffer Cache

+ The Libkern Library 







# XCode and Kernel development env

+ Cocoa framework 

+ C++ 

+ XCode 

    + Compiler for c/c++, objective c 

    + sourcecode debug

    + API + header files - used for kernel dev 

    + profiling tools - measure code execution time + app dev + performance bottleneck 

+ kernel extension 

+ kernel extension template 

+ logfile /var/log/kernel.log 





#### IO kit framework 

    - kernel framework

    - IOkit framework 

- THE I/O KIT MODEL 

    - hardware 

    - usb device 





- THE INFO.PLIST FILE

    - list of drivers 

    - probe score 

    

- THE KERNEL LIBRARY: LIBKERN

    - os object 

    - tracking mem leaks 

    - container class

    - query a container for object

## Universal serial bus 

- USB specification and architecture

- USB subsystem provided by I/O Kit

- 

## Networking 

- BSD layer 

- socketAPI 

- protocol handler 

- network interface 

- network kernel extension NKE 

- Network memory buffer 

- IO Kit : write driver for network hardware 

## Audio driver 

- IOKit Audio Support 

- SamplePCIAudioDevice

- IOAudioDevice

- IOAudioStream

- MyAudioEngine

- Driver & hardware init

- audio driver's IOAudioDevice subclass

- config hardware device provider 

    - PCI & Thunderbolt, IO region 

    - USB devices 

- register audio control `IOKit/audio/AudioDefines.h.`

- create input mute control `IOAudioToggleControl::createMuteControl`

- implement Audio Engine 

    -  I/O in an audio driver

    - Allocate sample buffers and associated IOAudioStream instances.

    - `performAudioEngineStart()`

    - Header File for the MyAudioEngine Class

- I/O Engine Initialization

- Creating and Initializing Audio Streams

- Starting and Stopping the Audio Engine

- Engine Operation: Handling Interrupts and Timestamps

## Storage system 

- Physical connection 

- command protocol 

- Transport layer driver

- Building a RAM disk device 

- Partition scheme 

- Media filter driver 

    - Develop a filter scheme for encryption 

## POSIX standard 

- process 

- signal 

- fs

- pipe

- C 

- IO 

## Stack 

- C/C++ 

- Go arsenal CGO 

- OpenSSL 

# Docs / Reference 

+ https://en.wikipedia.org/wiki/Kernel_(operating_system)

+ https://docs.01.org/clearlinux/latest/guides/kernel/kernel-development.html 

- Darwin kernel (mirror): https://github.com/apple/darwin-xnu

- Apple opensource : https://developer.apple.com/opensource/