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[solved] I have followed a tutorial and it does not work
https://forum.osdev.org/viewtopic.php?f=1&t=33785		 Page 1 of 1
Author:  wellwell [ Wed Jul 24, 2019 6:54 am ]
Post subject:  [solved] I have followed a tutorial and it does not work
I am fallowing the tutorial to build a kernel, http://www.jamesmolloy.co.uk/tutorial_html/, however, the kernel crashed on activated paging. the kernel crashed on executing the code
Code:
asm volatile("mov %0, %%cr0":: "r"(cr0));

what's up?


I used gdb to debug this kernel， and returned Cannot find bounds of current function， when executing this code.

i finally reached the part of multithread and could print A and B at the same time but without paging <_<. Thanks all, and good lucks.

Image

printed by A B C D four threads
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Solved finally!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

with paging,
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the heap
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user mode
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file system
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Image
Author:  Octocontrabass [ Wed Jul 24, 2019 6:59 am ]
Post subject:  Re: kernel crashed on activated paging
Have you read this list of known bugs in the tutorial? Keep in mind this list is not complete.
Author:  wellwell [ Wed Jul 24, 2019 7:21 am ]
Post subject:  Re: kernel crashed on activated paging
Octocontrabass wrote:
Have you read this list of known bugs in the tutorial? Keep in mind this list is not complete.

Many Thanks, Is there any other tutorials for beginner?
Author:  TheCool1Kevin [ Wed Jul 24, 2019 8:38 am ]
Post subject:  Re: kernel crashed on activated paging
Hello and welcome to OSDev.

I believe this humorously titled post may help: I have followed a tutorial and it does not work

Unfortunately, I must redirect you to this post Beginner Mistakes before you become utterly overwhelmed by this subject after spending countless hours going in circles. Please understand that this is a very difficult subject and there are no tutorials that can cover paging to the depth that it deserves.

OSDev tutorials should only serve as a jumping-off point in your development. I highly urge you to abandon any tutorial code after you have a general grasp on the topics. A good place to go after would be the Intel Software Developer Manuals (namely volume 3, section 4).

Good luck :D
Author:  GMorgan [ Wed Jul 24, 2019 3:56 pm ]
Post subject:  Re: kernel crashed on activated paging
It is likely your paging structure is invalid or your GDT is set up incorrectly.

When I last did something like this I moved some code from NASM to GAS and bugs emerged from that (moving 5 in NASM means the value 5, in GAS the value at memory location 5). Check you are actually putting what you expect into each page table record.
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