cedille's Introduction

The Cédlle Hybrid kernel

The Cédille Kernel is a kernel in development. It's goal is to be a complete toy kernel that can self host.

Building

Note: You must use a Cross Compiler.

Ensure your cross compiler is in PATH.
Set HOST to your specific architecture, or leave it as default for the default x86 architecture.
Call build.sh; the kernel should compile.

You can prefix any command with HOST="target-triple" to target that host.

Now that you have a kernel built:

To generate an iso image, call iso.sh
To run the kernel in qemu, call qemu.sh
To reset everything, run clean.sh

To configure the kernel build process (such as flags), modify scripts/config.sh

Finding your host value

The value of HOST is the first two parts of the target triple for the platform.

For example, for i686-elf-gcc, your HOST is i686-elf.

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cedille's Issues

Architecture

What architecture is required to run this kernel

I think you're misunderstood the multiboot information about mem_upper(amount of KB available after the first 1MB addresses) and mem_lower(amount of RAM avalaible in the first 1MB addresses of the RAM) because of this line:

init_malloc(0, multiboot->mem_upper * 1024);

It seems your are going with the upper memory, but you are allocating just after the kernel!. Also note that it may exist a unusable gap between lower and upper memory. This explains all very well: http://wiki.osdev.org/Detecting_Memory_(x86)#Memory_Map_Via_GRUB

And thank you for doing this, I'm beggining with kernels and your project is helping me a lot to understand the basics, the code is very clean.

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