Building a KVM Virtual Machine in Rust: Running a binary

Recap

This is a continuation of

Notice that the org 0x1000 header is quite arbitrary and it's actually a good

lead of what we also need to do (set the instruction pointer). Let's compile the

assembly file with:

nasm ./samples/hello-world.asm

Then, we want to load our binary into the memory region at address 0x1000:

let mut file = File::open("./samples/hello-world")?;

let mut code = Vec::new();

file.read_to_end(&mut code)?;



unsafe {

    std::ptr::copy_nonoverlapping(code.as_ptr(),

                                  (mem_ptr as *mut u8).add(0x1000),

                                  code.len()) };

Here we are using the more optimal copy_nonoverlapping because we can be quite

certain that the memory where code is stored is not overlapping with our

memory region.

Creating a vCPU

As we saw in .

The more x86-specific code with exit reasons can be found in the