In Project $2$ Part $3,$ you caused the provided project$2.$S to call the function named sekret$\_$fn by

exploiting a buffer overflow in gets$()$ and overwriting the RA register of main$(),$ the caller of gets$().$

Your job in this part is to implement a stack canary that gets pushed on the stack just below the

RA register. You will work from a created copy of your project $2$ source code. Add the stack canary

implementation to the main$()$ function prolog. Choose a stack canary value that is a printable

ASCII or UTF$-8$ string. You should allocate additional stack space and adjust the stack offsets for

saving RA to do this. Then, in the main$()$ function epilog, implement a check to compare the stack

canary on the stack with the expected stack canary value that was stored in the prolog. If the values

do not match, call the exit syscall $($see ecall$\_$read$\_$write sample code in Canvas Modules$).$ If the

values do match, return as usual from main$().$

In your README report, include the stack canary value you added to main$()$ as both the

printable string, and as a hexadecimal value. Show a screenshot of your QtRVSim window showing

the register window when reproducing the attack you came up with from Project $2$ Part $3$ that calls

sekret$\_$fn through the buffer overflow.