Assembly Language Primer For Hackers (Part 4) Hello World

Description: This is Part 4 of the "Assembly Language Primer for Hackers" video series. Please begin here with Part 1, if you have not already done so. In this video we will look at the structure of assembly language programs - .data, .bss, .text segments, how to pass arguments to linux system calls in assembly, using GAS and LD to assemble and link code and finally in the end we go through a step by step approach to create our first "Hello World" program. Please download the JustExit.s andHelloWorldProgram.s code before you begin with the tutorial. 

Justexit.s code

Code:

.text

.globl _start

_start:
    movl $1, %eax
    movl $0, %ebx
    int $0x80

HelloWorldProgram.s Code

Code:

# My first Assembly program

.data

HelloWorldString:
    .ascii "Hello World\n"

.text

.globl _start

_start:
    # Load all the arguments for write ()

    movl $4, %eax
    movl $1, %ebx
    movl $HelloWorldString, %ecx
    movl $12, %edx
    int $0x80

    # Need to exit the program

    movl $1, %eax
    movl $0, %ebx
    int $0x80

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