Tiny bootloader

This project is a simple bootloader written in C which prints some message to the COM1 serial line. The source code uses as little assembler as possible.

Requirements

• GNU C Compiler
• GNU Make
• QEMU x86_64 emulator

Compilation

To compile the project, run the following command on a terminal :

make

If you want to add, to link a static object file (.o) to the bootloader, you can do so by running the following command:

EXTRA_OBJECT=file.o make

This object file must be produced from C code with the following structure (you can check an example of this in the tests/ folder) :

void win(int (*printf_ptr)(const char *fmt, ...))
{
      /* some code that uses the function in parameter */
}

Execution

You can run the following command to launch the bootloader with QEMU :

qemu-system-x86_64 -enable-kvm -fda hello64 -nographic -serial stdio -monitor none