kernel-demo's Introduction

Code file and directroy

bochsrc		/* configuration of bochs */
boot		/* booter,loader... */
docs		/*  documents */
include		/* struct, macro, declearation... */ 
kernel		/* kernel */
lib			/* common function like disp_str()... */
Makefile	
README

All operations below are tested in Lubuntu 13.04, I suppose it also works at Ubuntu.

Install bochs

bochs is a x86 PC emulator, it can run our kernel demo. In order to enable debugger, you should download source and compile it.

For example, download file "bochs-2.6.1.tar.gz", and extract it.

$ tar -zxvf bochs-2.6.1.tar.gz

Before generating Makefile, maybe some librarys are needed.

$ sudo apt-get install gcc build-essential xorg-dev libgtk2.0-dev

Then, enter the source directory

$ cd bochs-2.6.1

There is a mistake to generate Makefile, we should fix it.

$ vim Makefile.in

At line 190 of Makefile.in, add "-lpthread"

Then, generate Makefile, compile, link, and install

$ ./configure --enable-debugger --enable-disasm 
$ make
$ sudo make install

Prepare directory

At the root directory of our repository,

$ mkdir image
$ mkdir build
$ mkdir obj
$ cd /mnt;sudo mkdir floppy;cd -

Creare image file

Create [fd] image file "my_os.img"

$ cd image
$ bximage

Make filesystem

$ mkfs.msdos my_os.img
$ cd ..

Build

We need nasm

$ sudo apt-get install nasm
$ make all
$ make install

Run bochs

The configure file "bochsrc" is in repository now, so just type 'bochs', OS's kernel placed at address 0x30400, you can make breakpoint at that address.

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