help with mov command

[djidji]

two things:

what does mov 0xfffffff0(%ebp), %eax do?
and
what does mov (%eax), %eax do?

i do understand some basics of the mov command but only it it's simplest form: mov %ebp, %eax

thanks,

seriously clueless

[realcr]

What kind of assembly language is that? I can't recognize it..

realcr.

[MichaelW]

The code looks like GAS (AT&T) syntax, so these statements:

mov 0xfffffff0(%ebp), %eax
mov (%eax), %eax

Should be equivalent to these statements in MASM (Intel) syntax:

mov eax, [ebp-16]
mov eax, [eax]

http://www.delorie.com/djgpp/faq/converting/asm.html

[djidji]

this is something i am running on my IBM ThinkPad so it's on Intel processor running uder Fedora Core III. to be hones, i am not trying to write any code it's just that when i use gdb to dissasamble a program that's the code i get. so all i am trying to do is understand what is going on... any other suggestions? by the way, thanks for responses.

[pbrennick]

djidji,
You are disassembling a Linux program and asking a question about the result on a Windows forum.  This is mixing tangerines and oranges.  I don't think we will be able to help you as much as the help you would get from a Linux based forum.  You can try, though, and we will try to help.

Paul

[djidji]

djidji,
You are disassembling a Linux program and asking a question about the result on a Windows forum.  This is mixing tangerines and oranges.  I don't think we will be able to help you as much as the help you would get from a Linux based forum.  You can try, though, and we will try to help.

Paul

i see... all right, i though that assembler is more architecture specific than it is operating system specific but that just shows how much i know about it. in any case i appreciate the help.