Problem 1
0xbffff6ec &  ret add
0xbffff6e8 & saved ebp
0xbffff6e4 &
0xbffff6e0 &
0xbffff6dc &
0xbffff6d8 &
0xbffff6d4 &
0xbffff6d0 &
0xbffff6cc & 0x080484f1
0xbffff6c8 & 0xbffff600 <-- ebp
0xbffff6c4 & 0x61000000
0xbffff6c0 & 
0xbffff6bc &
0xbffff6b8 &
0xbffff6b4 & 0xbffff6c7
0xbffff6b0 & 0x08048598
^esp points here

yes
no - main's ebp is corrupted, we set esp to ebp and return
no
no

Problem 2
M=7
N=6

Problem 3
cow

  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|prime| rib | raw    |XX| filet     |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

bull

  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|prime|XXXXX| rib       | raw          |XX|roast| filet     |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

0xffcd
0x00793001
0x55
0x66
0x12

Problem 4
                <- buf
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
   |           |64|72|2e|65|76|69|6c|00|           |           |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
                                       ^
                                      ebp 
         ---------- addresses increase this way ------>

0x6c

 *((int*)buf) = 0x652e7264
 *((int*)(buf+6)) = 0x08040073

ebp = 0x6576696c


Problem 5
A.
union1:   &s=0xbffff84c &i=0xbffff84c  &d=0xbffff84c
struct1:  &s=0xbffff854  &t = 0xbffff856 &i=0xbffff858  
          &d=0xbffff85c &un=0xbffff860
sizeof(struct1) = 20
sizeof(union1) = 8

B.
union1: &d
struct1:  none, un is already 8byte aligned and the double within is 8 byte aligned

C.
Both union1 and struct1 are incorrect, since they should be 8 byte aligned and aren't

D.
R = 7
C = 11


Problem 6

A.
4byte

B.
  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|c0|c1|xxxxx| str       | d                     | u         |xxxxxxxxxxx|
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

C. 24

D. 24


Problem 7
M=11
N=2