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From: Andy Valencia <vandys@vsta.org>
Newsgroups: comp.lang.c,alt.os.development
Subject: Re: [OSDev] How to switch to long mode in x86 CPUs?
Date: Sat, 01 Mar 2025 20:02:57 -0800
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cross@spitfire.i.gajendra.net (Dan Cross) writes:
> >I am trying to develop my own, simple operating system to learn more
> >about how kernels work and low level stuff like that.  However, I am
> >stuck at setting up paging while switching long mode (64-bit protected
> >mode) in x86 processors.

Two things in addition to the fellow who cross-posted this and gave
you some great analysis.

1. If you use bochs, you can single step the emulator itself, and
basically have a microcode view of what the processor's trying to do
with your code.  This can save you _tons_ of time.

2. You should crib from working code.  For 32-bit x86, may I humbly
point at my protected mode microkernel, VSTa:

https://sources.vsta.org:7100/vsta/index

Andy Valencia
Home page: https://www.vsta.org/andy/
To contact me: https://www.vsta.org/contact/andy.html
Fediverse: @vandys@goto.vsta.org