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The randomness occurs only in the stack , heap ... etc

Address Space Layout Randomization - HowToHack

It requires more discussion... and a good book about operating systems.
The topic is not...

Well thank you guys. You give me important advice .

My first question becames from this book ->

Teach Yourself C in 21 Days (Sams Teach Yourself): Peter G. Aitken,Bradley L. Jones,Peter...

" because the process simply cannot modify the memory containing code "

Because of process isolation ?

Process isolation - Wikipedia, the free encyclopedia

and what is the usage of memory...

What do you mean by "is all there is to it?" I have a little problem in translation....
Could you explain with more simple words ? Is there any wrong with my reflection ?

Assuming that we have the code




int *p

*p = 2;