Hi all,
Looking for info about buffer overflow, i've found something quite
strange which is obviously due to my lack of knowledge.
I'm actually using a debian etch with both gcc 4.1.2 and 3.4.6
Why are they some differents version of gcc not working the same way
when pointer calculations ?
let's take this simple example :
char array[1]
Disassembling this code is giving me the following information about how
much %esp register is substracted :
gcc 3.4.6 does calculate 4 bytes ( SUB $ 0x4, %esp )
gcc 4.1.2 does calculate 16 bytes to be substracted to %esp register
( SUB $ 0x10, %esp )
Why is there a difference between 3.4.6 and 4.1.2 gcc version ?
Despite my efforts understanding this, i would appreciate any links
regarding any document related to this.
Thanks in advance.
Regards,
Pierre
