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flat assembler > OS Construction > Searching for a Tutorial on how to write a Hybrid Kernel

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dstyl



Joined: 23 Jul 2015
Posts: 31
Searching for a Tutorial on how to write a Hybrid Kernel
Im searching for a Tutorial how to write a simple Hybrid Kernel.
But couldnt find one. If you know one please link it.
Thx in Advance.
Post 09 Jan 2016, 19:21
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ACP



Joined: 23 Sep 2006
Posts: 196
I doubt you will find one that will fit your needs judging from your question, but if you need a good starting point I'd suggest to read this book: Modern Operating Systems (4th Edition)
Post 09 Jan 2016, 22:16
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dstyl



Joined: 23 Jul 2015
Posts: 31
Thank you for your answer. Sadly the recommended book is to expensive for me. I would favour a quick Tutorial to get me on the right path.
Post 09 Jan 2016, 22:51
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sleepsleep



Joined: 05 Oct 2006
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google PH.Modern.Operating.Systems.4th.Edition.2014.3.pdf
Post 10 Jan 2016, 01:45
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dstyl



Joined: 23 Jul 2015
Posts: 31
Ive read the pdf idoesnt contain any information about hybrid kernels. It mentions the microkernel part of xxnu and wondows nt and thats it. But thx for the tipp the book is really good.
Post 10 Jan 2016, 16:45
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cod3b453



Joined: 25 Aug 2004
Posts: 612
It sounds like your focus is on the "hybrid" part - all this refers to is how you partition your drivers/services with respect to system (ring 0) and user (ring 3) mode. Most of this will be the same across all patterns (monolithic/hybrid/micro) except for the privileged instructions (ring 0 only) and IO access or IRQ ISRs (both can be any ring or restricted - up to you). The problem is this means it's actually not simple - you'll want to read about monolithic and micro then decide how you want to proceed.

The two major factors are: security vs speed and/or complexity of kernel vs drivers/services. Do you have any particular preferences for these?
Post 10 Jan 2016, 23:44
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dstyl



Joined: 23 Jul 2015
Posts: 31
Thx for answer.
My goal is to create a simple hybrid kernel demo.
Kernel should be as simple as it gets. Drivers should be handled by an iokit.
A part that i dont know how i will call it will manage the filesystem.
all of them should lie in ring0.

Thats my plan until now.

PROGRAMS - a SHELL for example
----------------------------------------------
LIBS - ?AUDIO? - other stuff
----------------------------------------------
FILESYSTEMMANAGER - KERNEL - IOKIT

im trying to get a similar structure to the xnu kernel

Image

Im an absolute beginner in os construction and im having at the moment trouble with a very basic kernel that only can print strings and start a shell and read basic keyinput, but only to videomemory.
I just want to know how to get the layout for a hybrid kernel wright at the beginning.
If you want you can look at the current source. Maybe you find some stuff that i made wrong.


Description:
Download
Filename: aXIU.zip
Filesize: 81.21 KB
Downloaded: 10 Time(s)

Post 11 Jan 2016, 22:00
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