Hello everybody:
I'm doing an OS for X86. This has been brewing since March, I'd like any feedback on things people like/dislike in Linux. as my OS resembles it somewhat.
A tiny operate system has work on i386. I'll add more features like virtual file-system, virtual memory and general device driver.
BTW, it's only a toy (just a hobby), I only want to know machanism of linux, and won't be big and professional like Linux.
Buddy ([email protected]) ^_^
OS information:
| Item | contents |
|---|---|
| OS Name | BiscuitOS |
| Release Version | V0.0.1 |
| Target Platform | I386(X86 family) |
| Emulator | Qemu |
| Memory limit | 16 M |
| Disk | Floppy |
| Rootfs | none |
| Host Machine | Ubuntu16.04 |
| Paging | Support |
| Segmenting | Support |
| Bit | 32-bit |
This OS running on X86 machine, if you don't have X86 machine, you
can use X86 emulator to run OS. This OS have ran on qemu, qemu is
an useful X86 emulator to emulate environment of X86. Please follow
specific steps to make it work.
- Install essential tools
```
sudo apt-get install qemu
sudo apt-get install figlet gcc make gdb git
```
If you use 64 bit system, please install 32 bit library.
```
sudo apt-get install lib32z1 lib32z1-dev
```
- Download source code
Download souce code from github, please connect network first.
```
git clone https://github.com/BuddyZhang1/BiscuitOS.git
```
- Comple BiscuitOS
```
make clean
make
make start
```
- Debug BiscuitOS
If you want to debug BiscuitOS, please open debug macro on top Makefile.
```
vi */BiscuitOS/Makefile
--- DEBUG :=
+++ DEBUG := 1
```
Then, recompile source code.
```
make clean
make
```
Now, we can start to debug OS.
On Host:
```
make debug
```
On Target:
You can utilize `gdb` to single debug and so on. follow these steps:
```
gdb tools/build/system
(gdb)target remote :1234
(gdb)b main
(gdb)c
(gdb)n
or
(gdb)s
```
You can also utilize `objdump` to get more useful information, such as:
```
objdump -x -s -S -dh tools/build/system
```
If you want to debug `bootsect.s` and `setup.s`, you should follow
these steps:
```
gdb tools/build/.debug_bootsect
or
gdb tools/build/.debug_setup
(gdb)target remote :1234
(gdb)b *0x7C00
(gdb)c
(gdb)d
(gdb)(delete break?)y
(gdb)ni
or
(gdb)si
```
You can also uitlize `objdump` to get more useful information,like:
```
objdump -x -s -S -dh tools/build/.debug_bootsect
```
I have collected more useful documentions, you can access my github to get it. The github link:
https://github.com/BuddyZhang1/Book-Segment
If you have any new source code or problem, you can send email to me. This is my frequently used email:
Software is like sex. It's better when it's free
--- Linus Torvalds
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