I tried to repeat the buffer overflow example from this article by aleph one
I do this as a practice for a project in the computer security course that I take, so please, I really need your help. I followed suit while carrying out tasks along the way. My problem is that the assembler code downloaded gdbon my computer (I do it on a Debian Linux image running on VM Ware) is different from what is shown in the example in the article. There are some designs that I find confusing.
Here is the one from my computer:
here is one from the article ...
Dump of assembler code for function main:
0x8000490 <main>: pushl %ebp
0x8000491 <main+1>: movl %esp,%ebp
0x8000493 <main+3>: subl $0x4,%esp
0x8000496 <main+6>: movl $0x0,0xfffffffc(%ebp)
0x800049d <main+13>: pushl $0x3
0x800049f <main+15>: pushl $0x2
0x80004a1 <main+17>: pushl $0x1
0x80004a3 <main+19>: call 0x8000470 <function>
0x80004a8 <main+24>: addl $0xc,%esp
0x80004ab <main+27>: movl $0x1,0xfffffffc(%ebp)
0x80004b2 <main+34>: movl 0xfffffffc(%ebp),%eax
0x80004b5 <main+37>: pushl %eax
0x80004b6 <main+38>: pushl $0x80004f8
0x80004bb <main+43>: call 0x8000378 <printf>
0x80004c0 <main+48>: addl $0x8,%esp
0x80004c3 <main+51>: movl %ebp,%esp
0x80004c5 <main+53>: popl %ebp
0x80004c6 <main+54>: ret
0x80004c7 <main+55>: nop
As you can see, there are differences between them. I am confused and cannot fully understand the assembly code from my computer. I would like to know the differences between the two.
pushl push, mov vs movl .....
0xhexavalue(%register)?
, , .
UPDATE:
function :
, 1, 2 & 3, .
"esp" .
?
...