May 2, 2024
We need an x86 Linux Docker image, and I prefer using the Ubuntu 22.04 Jammy release for this purpose.
docker pull --platform linux/amd64 ubuntu:jammy
Now, we can run it,
# We didn't pass '--rm' to retain it after exiting the Docker terminal/shell. Instead, we assigned it a name ('--name x86asm') for easy attachment later.
docker run -it --name x86asm --platform linux/amd64 ubuntu:jammy
# To attach
docker start --interactive --attach x86asm
# To delete this container
docker container rm x86asm
Next, we need to install some packages,
apt-get update
apt install -y binutils vim-tiny nasm
Next, we are ready to write assembly code and build it. Let's write it to a file using vim-tiny: vi hello.asm,
; hello.asm
section .data
hello_msg db "Hello, World!", 10
section .text
global _start
_start:
mov rax, 1
mov rdi, 1
mov rsi, hello_msg
mov rdx, 14
syscall
mov rax, 60
xor rdi, rdi
syscall
Finally, compile, link and run,
# Compile
$ nasm -f elf64 hello.asm -o hello.o
# Link
$ ld hello.o -o hello
# Run
$ ./hello
Hello, World!