Make the following code read \"Hello, world! CE 242 is an awesome and fun class!

Question

Make the following code read

"Hello, world!

CE 242 is an awesome and fun class!

CTU is a great University!

I love the USA!"

section .text

global _start ;must be declared for using gcc

_start: ;tell linker entry point

mov edx, len ;message length

mov ecx, msg ;message to write

mov ebx, 1 ;file descriptor (stdout)

mov eax, 4 ;system call number (sys_write)

int 0x80 ;call kernel

mov eax, 1 ;system call number (sys_exit)

int 0x80 ;call kernel

section .data

msg db 'Hello, world!',0xa ;our dear string

len equ $ - msg ;length of our dear string

Explanation / Answer

Similiarly, if we are interested about the current value of a register, we can simply "print $register_name". For example, after line 8 is executed, we can inspect $eax as:

If we are interested about all the register values, we can use "info registers" command to display the value in all registers.

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