Consider the following C program:

$01$ int f$($int n$)\{$

$02$ if$($n $==1)$

$03$ return $1$; $//$ this line

$04$ return n $+$ f$($n$-1)$;

$05\}$

$06$

$07$ int main$()\{$

$08$ int result $=$ f$(5)$;

$09$ printf$("$The factorial of $5$ is $\%$d

$",$ result$)$;

$10\}$

Suppose that the size of each stack frame for procedure f is $32$ bytes. Also suppose that immediately before the call to f in main, $\%$rsp contains $0$x$7$fffffffdf$70.$ Provide the contents of $\%$rsp immediately before the commented line in f is executed.

$\%$rsp contains $0$x

$.$

$($Assume a direct translation to x$86$ with no optimizations.$)$

Flag question: Question $3$

Question $32$ pts

Suppose that we have disassembled a program and see these two lines at the site of a procedure call:

$...$

$0$x$4004$f$6$: callq $0$x$40050$c

$0$x$4004$fb: mov $$0$x$0,\%$eax

$...$

Execution of the callq instruction causes address $0$x

to be pushed onto the stack, and address $0$x

to be placed in $\%$rip.

Flag question: Question $4$

Question $41$ pts

The value of which argument is placed into register $\%$rax to prepare for a procedure call?

Group of answer choices

$1$st argument

$2$nd argument

$3$rd argument

$4$th argument

$5$th argument

$6$th argument

none of the above

Flag question: Question $5$

Question $51$ pts

Where is the value of a potential $7$th argument placed to prepare for a procedure call?

Group of answer choices

in register $\%$rsi

in register $\%$r$9$

in memory at the address $(\%$rsp$)$

in memory at the address $8(\%$rsp$)$

in memory at the address $-8(\%$rsp$)$

none of the above

Flag question: Question $6$

Question $62$ pts

Consider the following C program:

int p$($int a$,$ int b$)\{$

return q$($b$,$ a$)+3$a $-2$b;

$\}$

int q$($int x$,$ int y$)\{$

return x $+$ y;

$\}$

int main$()\{$

int result $=$ p$(1,2)$;

printf$("$The answer is $\%$d

$",$ result$)$;

$\}$

Notice that both p and q use the first two argument registers.

Who is responsible for saving the values of p$\text{'}$s two arguments, to ensure that they are available for use after the call to q$?$

$[$ Select $]$

Which x$86$ operation is used to save the contents of a register?

$[$ Select $]$

Which x$86$ operation is used to restore the contents of a register?

$[$ Select $]$

Flag question: Question $7$

Question $71$ pts

What is the exact compiler flag one can use with gcc so that helpful information $($e$.$g$.,$ function names, line numbers$)$ can be seen when debugging with gdb$?$

Flag question: Question $8$

Question $82$ pts

Match the x$86$ instruction to where it belongs in a procedure's prolog or epilog.

Group of answer choices

$1$st prolog instruction

$[$ Choose $]$

$2$nd prolog instruction

$[$ Choose $]$

$1$st epilog instruction

$[$ Choose $]$

$2$nd epilog instruction

$[$ Choose $]$