🚧 Adds assembly hello world

.gitignore

@@ -1,3 +1,4 @@
 .idea/
 
-a.out
+*.out
+*.o

build.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/bash
+
+gcc main.c -o a.out
+
+gcc -c main.s -o b.o
+ld b.o -o b.out
+rm b.o

main.s

@@ -0,0 +1,17 @@
+.global	_start
+
+.text
+_start:
+	movl  $4, %eax   # 4 (code for "write" syscall) -> EAX register
+	movl  $1, %ebx   # 1 (file descriptor for stdout) -> EBX (1st argument to syscall)
+	movl  $msg, %ecx # 32-bit address of msg string -> ECX (2nd argument)
+	movl  $len, %edx # length of msg string -> EDX (3rd arg)
+	int   $0x80      # interrupt with location 0x80 (128), which invokes the kernel's system call procedure
+
+	movl  $1, %eax   # 1 ("exit") -> EAX
+	movl  $0, %ebx   # 0 (with success) -> EBX
+	int   $0x80      # see previous
+.data
+msg:
+	.ascii  "Hello, world!\n" # inline ascii string
+	len =   . - msg           # assign (current address - address of msg start) to symbol "len"