[Tutorial] Advanced C

[m0skit0]

I am on Ubuntu 10.04 in a VM (If its the VM screwing with stuff, then I'll try again soon as I fix my hard Ubuntu installation)

The VM has nothing to do. Your Ubuntu is old, and if you didn't update GCC, you're using an old GCC as well, so it's normal you don't get the same output.

I see you've posted x/w $1 twice, but you didn't show what you did between one and the other. If you did nothing, well obviously the output is the same and it's correct.

[frank]

Alright...
apt-get said that build-essential is latest version
I guess I'll update ubuntu although...egh...oi ill have an updated vm and hard 10.04 (cuz i need that version specifically for other things)

Anyways, i did "s" between those two "x/w $1"s.

[m0skit0]

Anyways, i did "s" between those two "x/w $1"s.

You need another "s" because you need mov %eax,-0xc(%ebp) to execute to update the value in RAM. LEA instruction only modifies the CPU register, not the variable per se.

[frank]

Anyways, i did "s" between those two "x/w $1"s.

You need another "s" because you need mov %eax,-0xc(%ebp) to execute to update the value in RAM. LEA instruction only modifies the CPU register, not the variable per se.

Ah, okay i think I understand. So the LEA instruction calculates into a CPU register, and the mov instruction moves it to RAM, right?
I'll try it when I find the time, because I am busy right now.

[m0skit0]

So the LEA instruction calculates into a CPU register, and the mov instruction moves it to RAM, right?

Absolutely.