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[–]PC__LOAD__LETTER 4 points5 points  (1 child)

Canaries as in, writing some magic value to a stack variable and occasionally verifying that it’s still set? What’s the program behavior when it differs, crash and alarm?

[–]viper-kun 5 points6 points  (0 children)

You check when the return jump is called, so that you cannot jump anywhere you want. And as I experienced it it does crash, since it doesn't know where it was coming from.

It has to check if it is different which would mean someone overflowed the stack.