ASM_SecurityTube

.text
.globl _start

_start:
	# We jump to the bottom of the page, so we can call thecode
	# from below, we need to do this in order to avoid null bytes.
	jmp intro

thecode:
	# Flush the registers to remove potential random data
	xorl %eax, %eax
	xorl %ebx, %ebx
	xorl %edx, %edx

	# Write to the 1 byte counterpart of eax and ebx (to remove nulls)
	movb $4, %al
	movb $1, %bl

	# Get the string from the stack and put it into ecx
	popl %ecx

	# Write the string length into dl (edx)
	movb $12, %dl
	int $0x80

	# Flush the registers once more and call exit(1)
	xorl %eax,%eax
	xorl %ebx, %ebx
	movb $1, %al
	movb $1, %bl
	int $0x80

intro:
	call thecode

	# We define this after the so we can pop it off the stack
	.ascii "Hello World\n"