OSDev.org

Posted: **Mon Dec 31, 2007 4:57 pm**

Hey.

I am writing my own C++ kernel and intend to use GRUB as the bootloader until I can make my own. As I am running a windows machine, I have had to try a precompiled .img file to use GRUB.

Now onto the problem. I have set up my VMWare Workstation to boot of the GRUB image that I downloaded from JamesM kernel development tutorial. When it starts up all it comes up with is the usual boot screen and then just hangs on the

Starting up....

screen. I have go one to develop a screen driver using the same set of kernel development tutorials and whatever I try, nothing seemes to get it to boot my kernel!

I have tryed changing to directory structer, placeing my kernel.bin file in every different folder and place i can think of and nothing will work! When i compile my kernel all it comes up with is warning messages so i assum that this is not the cause as it compiles ok?

I have also tryed bootf bootloader and VMWare threw up an error about a kernel stack fault. If anyone has any help on how to run a kernel with either bootloader (bootf preferd) and example kernels to go with them. When compileing the example kernel that comes with bootf i get errors when jloc trys to compile the .c version. These errors are

Code: Select all

 Failed first pass open:kernel.o
Failed seconds pass open:kernel.o

Also if anyone has any one had any tutorials on developing a bootloader from scratch, then please let me know.I am very grateful for your help

I know you guys do this out of free will, so thanks and sorry if this is a typical beginner OS dev question.

Many, many thanks.
Harry.

Posted: **Mon Dec 31, 2007 10:33 pm**

Ummm... as far as grub, did you edit the menu.cfg or menu.lst, or what ever file?

Posted: **Tue Jan 01, 2008 4:52 am**

Yes, I tried editing that but it still does not work!

Umm...

What is this for?

Posted: **Tue Jan 01, 2008 6:36 am**

(The umm was because I was thinking

) and did you set the location of your Kernel to the absolute location? If you have the file, may I see It?

Posted: **Wed Jan 02, 2008 5:25 am**

Hi
I am using the GRUB image from Bran's Kernel Developement Tutorial:
http://www.osdever.net/bkerndev/index.php

Can you post your grub config file (menu.lst), because I think that there is
something wrong, because I had this problem at the beginning too.

A very good Bootloader Tutorial is in this: http://www.brokenthorn.com/Resources/OSDevIndex.html

Cheers
Christian

PS: My English is not very good at the moment.

Posted: **Wed Jan 02, 2008 4:21 pm**

After some more playing around I finally managed to get it to work!

Thanks for your help!

Harry.

Posted: **Wed Jan 16, 2008 7:06 pm**

if don't mind can u please explain what u did or - pass me a working cpy

thx

edit: never mind - i just read in your website that ur using grub which i was using too

-- I don't wanna use grub - i want the Os to load automatically but the grub asks for user input - how about in ur case ?
btw cool website

Posted: **Wed Jan 16, 2008 8:01 pm**

You could add

Code: Select all

timeout 0

to your menu.lst file and GRUB will automatically load the first entry without prompting.

Posted: **Thu Jan 17, 2008 4:47 am**

djnorthyy wrote:Hey.

I am writing my own C++ kernel and intend to use GRUB as the bootloader until I can make my own. As I am running a windows machine, I have had to try a precompiled .img file to use GRUB.

Now onto the problem. I have set up my VMWare Workstation to boot of the GRUB image that I downloaded from JamesM kernel development tutorial. When it starts up all it comes up with is the usual boot screen and then just hangs on the
Starting up....
screen. I have go one to develop a screen driver using the same set of kernel development tutorials and whatever I try, nothing seemes to get it to boot my kernel!

I have tryed changing to directory structer, placeing my kernel.bin file in every different folder and place i can think of and nothing will work! When i compile my kernel all it comes up with is warning messages so i assum that this is not the cause as it compiles ok?

I have also tryed bootf bootloader and VMWare threw up an error about a kernel stack fault. If anyone has any help on how to run a kernel with either bootloader (bootf preferd) and example kernels to go with them. When compileing the example kernel that comes with bootf i get errors when jloc trys to compile the .c version. These errors are
Code: Select all
 Failed first pass open:kernel.o
Failed seconds pass open:kernel.o
Also if anyone has any one had any tutorials on developing a bootloader from scratch, then please let me know.I am very grateful for your help I know you guys do this out of free will, so thanks and sorry if this is a typical beginner OS dev question.

Many, many thanks.
Harry.

So how did you fix it? this is possibly a known bug to do with the stack that GRUB passes, but I've never known it hit without some user fiddlage with the code.

OSDev.org

Bootloader Problems... again.

Bootloader Problems... again.

Thanks

Re: Bootloader Problems... again.