https://github.com/antoninhrlt/bootos

Kernel loader in protected mode with GDT initialized, for x64 and x86 operating systems
https://github.com/antoninhrlt/bootos

assembly kernel operating-system os x64 x86

Last synced: about 1 month ago
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Kernel loader in protected mode with GDT initialized, for x64 and x86 operating systems

• Host: GitHub
• URL: https://github.com/antoninhrlt/bootos
• Owner: antoninhrlt
• License: mit
• Created: 2022-05-28T12:56:32.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-06-01T14:31:18.000Z (over 2 years ago)
• Last Synced: 2024-11-08T06:45:07.259Z (3 months ago)
• Topics: assembly, kernel, operating-system, os, x64, x86
• Language: Assembly
• Homepage:
• Size: 7.81 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# bootos

Kernel loader in protected mode with GDT initialized, for x64 and x86 operating systems

## Usage

Clone the repository for your project : `git clone https://github.com/antoninhrlt/bootos` (delete the "test/" folder inside "bootos/" because useless)

Your project structure :

```

build/

  - kernel.o

bootos/ (cloned from https://github.com/antoninhrlt/bootos)

src/

  - kernel.c (will gives build/kernel.o)

```

Your Makefile :

```make

# Generates "floppy disk" with the operating system, runnable with "qemu"

floppy : bootos/build/bootos build/kernel

    cat $^ $< /dev/zero | dd of=$@ bs=512 count=2880

# Builds the kernel

build/kernel : build/kernel.o

    ld --oformat binary -Ttext 1000 -o build/kernel build/kernel.o 

build/kernel.o : src/kernel.c

    gcc -c -o $@ $<

# Builds the boot sector

bootos/build/bootos :

    $(MAKE -C .. build)

```

## Build

The project requires [make](https://www.gnu.org/software/make/), "ld" and [nasm](https://www.nasm.us/)

> Test also requires [gcc](https://gcc.gnu.org/)

```bash

# Build the project, giving "build/bootos" output

make build -B 

# Test for a simple kernel using "bootos"

(cd test && make emu -B) 

```