> reliably. But it relies upon being able to determine the frame limits
> of strcpy()'s caller. So -fomit-frame-pointer will, it appears, stop it
> working. Vendors (Mandrake at least) are currently shipping
> frame-pointerless shared libs.
The frame pointer is not a safe way to find the end of a buffer. You can
easily have
char buf[256];
void *ptr;
in the stack frame and indirectly overwrite ptr without going out of the
frame. Since the code then writes to ptr you can do a two step buffer
overrun.
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