1) how to initialize the stack with some unique pattern? so i can check it on the exit? sample program plz 2) how to add values in prolog and check it in epilog ? sample program plz
thanks, Vj
In your first question I think you are talking about preventing the execution stack from being overran. There are different technique to archive this, but I think the one closest to "some unique pattern" is the canary.
Theory:
The canary is a (random) check value that is placed just below the functions return address. Before returning from the function, the system checks if the canary has the same value as before. If not, the stack has been overran, since the memory is written from lower to higher addresses, and you can t trust the return address.
How it s done:
More information about canary values can be found here.
This (or some other stack overrun prevention technique) are generally implemented in modern compilers.
I have no idea about your second question.
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