mirror of
https://github.com/cowmonk/cowos.git
synced 2025-10-27 14:33:27 +00:00
Branch sync and push, reformated and made the OS look more "official"
This commit is contained in:
parent
13389f9617
commit
59e39d9842
9 changed files with 270 additions and 0 deletions
29
README.md
29
README.md
|
|
@ -1,2 +1,31 @@
|
|||
# cowos
|
||||
Custom OS from scratch in C
|
||||
|
||||
# Notes
|
||||
This only supports 32bit for now, please DO NOT compile with 64bit or it'll fail to boot
|
||||
|
||||
## compilation of any component
|
||||
You are required to get your own cross C compiler. This is because normal C compilers for your Linux distro (assuming that you are on Linux) will optimize against your own libs and other things. This OS doesn't exist yet, so this is a big no no in OS development. Another thing is that you want to compile for 32 bit, so you'll need to cross compile anyways...
|
||||
|
||||
### general c files
|
||||
```bash
|
||||
i386-elf-gcc -c kernel.c -o kernel.o -std=c99 -ffreestanding -O2 -Wall -Wextra # i386 is the 32 bit version of x86
|
||||
# also please compile with the -Iinclude flag to include the libraries like string.h in the arch
|
||||
```
|
||||
|
||||
### "compiling" the "boot stub"
|
||||
```bash
|
||||
i386-elf-as boot.s -o boot.o
|
||||
```
|
||||
|
||||
### linking the "compiled" boot stub w/compiled kernel img
|
||||
```
|
||||
i386-elf-gcc -T linker.ld -o cowos.bin -ffreestanding -O2 -nostdlib boot.o kernel.o
|
||||
```
|
||||
|
||||
## Getting it bootable
|
||||
You'll need grub and mtools. First move the compiled cowos.bin to isodir/boot. Then run the following command:
|
||||
```bash
|
||||
grub-mkrescue isodir/ -o cowos.iso
|
||||
```
|
||||
Now you can enjoy running this in qemu lol.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue