Difference between revisions of "CSC231 HexDump Exercise"
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| + | ::click [[CSC231 HexDump Exercise Solution|here]] for solution. | ||
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[[Category:CSC231]][[Category:Exercises]] | [[Category:CSC231]][[Category:Exercises]] | ||
Latest revision as of 11:44, 14 September 2012
--D. Thiebaut 08:47, 14 September 2012 (EDT)
Exercise: Reverse Engineering: from hexdump to asm
- Recreate the original program whose hexdump output is shown below:
[231a@beowulf ~/handout]$ hexdump -C mickey
00000000 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 |.ELF............|
00000010 02 00 03 00 01 00 00 00 80 80 04 08 34 00 00 00 |............4...|
00000020 d8 01 00 00 00 00 00 00 34 00 20 00 02 00 28 00 |........4. ...(.|
00000030 08 00 05 00 01 00 00 00 00 00 00 00 00 80 04 08 |................|
00000040 00 80 04 08 b8 00 00 00 b8 00 00 00 05 00 00 00 |................|
00000050 00 10 00 00 01 00 00 00 b8 00 00 00 b8 90 04 08 |................|
00000060 b8 90 04 08 16 00 00 00 16 00 00 00 06 00 00 00 |................|
00000070 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000080 b8 04 00 00 00 bb 01 00 00 00 b9 b8 90 04 08 ba |................|
00000090 0c 00 00 00 cd 80 b8 04 00 00 00 bb 01 00 00 00 |................|
000000a0 b9 cb 90 04 08 ba 03 00 00 00 cd 80 bb 00 00 00 |................|
000000b0 00 b8 01 00 00 00 cd 80 48 65 6c 6c 6f 20 4d 69 |........Hello Mi|
000000c0 63 6b 65 79 20 4d 6f 75 73 65 21 0a 0a 0a 00 00 |ckey Mouse!.....|
000000d0 01 00 00 00 00 00 0f 00 11 00 00 00 01 00 00 00 |................|
000000e0 64 00 00 00 80 80 04 08 00 00 00 00 44 00 17 00 |d...........D...|
000000f0 80 80 04 08 00 00 00 00 44 00 18 00 85 80 04 08 |........D.......|
00000100 00 00 00 00 44 00 19 00 8a 80 04 08 00 00 00 00 |....D...........|
00000110 44 00 1a 00 8f 80 04 08 00 00 00 00 44 00 1b 00 |D...........D...|
00000120 94 80 04 08 00 00 00 00 44 00 1f 00 96 80 04 08 |........D.......|
00000130 00 00 00 00 44 00 20 00 9b 80 04 08 00 00 00 00 |....D. .........|
00000140 44 00 21 00 a0 80 04 08 00 00 00 00 44 00 22 00 |D.!.........D.".|
00000150 a5 80 04 08 00 00 00 00 44 00 23 00 aa 80 04 08 |........D.#.....|
00000160 00 00 00 00 44 00 25 00 ac 80 04 08 00 00 00 00 |....D.%.........|
00000170 44 00 26 00 b1 80 04 08 00 00 00 00 44 00 27 00 |D.&.........D.'.|
00000180 b6 80 04 08 00 00 00 00 64 00 00 00 00 00 00 00 |........d.......|
00000190 00 6d 69 63 6b 65 79 4d 6f 75 73 65 2e 61 73 6d |.mickeyMouse.asm|
000001a0 00 00 2e 73 79 6d 74 61 62 00 2e 73 74 72 74 61 |...symtab..strta|
000001b0 62 00 2e 73 68 73 74 72 74 61 62 00 2e 74 65 78 |b..shstrtab..tex|
000001c0 74 00 2e 64 61 74 61 00 2e 73 74 61 62 00 2e 73 |t..data..stab..s|
000001d0 74 61 62 73 74 72 00 00 00 00 00 00 00 00 00 00 |tabstr..........|
000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000200 1b 00 00 00 01 00 00 00 06 00 00 00 80 80 04 08 |................|
00000210 80 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00 |....8...........|
00000220 10 00 00 00 00 00 00 00 21 00 00 00 01 00 00 00 |........!.......|
00000230 03 00 00 00 b8 90 04 08 b8 00 00 00 16 00 00 00 |................|
00000240 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 |................|
00000250 27 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 |'...............|
00000260 d0 00 00 00 c0 00 00 00 04 00 00 00 00 00 00 00 |................|
00000270 04 00 00 00 0c 00 00 00 2d 00 00 00 03 00 00 00 |........-.......|
00000280 00 00 00 00 00 00 00 00 90 01 00 00 11 00 00 00 |................|
00000290 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 |................|
000002a0 11 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 |................|
000002b0 a1 01 00 00 36 00 00 00 00 00 00 00 00 00 00 00 |....6...........|
000002c0 01 00 00 00 00 00 00 00 01 00 00 00 02 00 00 00 |................|
000002d0 00 00 00 00 00 00 00 00 18 03 00 00 d0 00 00 00 |................|
000002e0 07 00 00 00 09 00 00 00 04 00 00 00 10 00 00 00 |................|
000002f0 09 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 |................|
00000300 e8 03 00 00 43 00 00 00 00 00 00 00 00 00 00 00 |....C...........|
00000310 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000320 00 00 00 00 00 00 00 00 00 00 00 00 80 80 04 08 |................|
00000330 00 00 00 00 03 00 01 00 00 00 00 00 b8 90 04 08 |................|
00000340 00 00 00 00 03 00 02 00 00 00 00 00 00 00 00 00 |................|
00000350 00 00 00 00 03 00 03 00 00 00 00 00 00 00 00 00 |................|
00000360 00 00 00 00 03 00 04 00 01 00 00 00 00 00 00 00 |................|
00000370 00 00 00 00 04 00 f1 ff 11 00 00 00 b8 90 04 08 |................|
00000380 01 00 00 00 01 00 02 00 17 00 00 00 c4 90 04 08 |................|
00000390 01 00 00 00 01 00 02 00 1d 00 00 00 cb 90 04 08 |................|
000003a0 01 00 00 00 01 00 02 00 24 00 00 00 80 80 04 08 |........$.......|
000003b0 00 00 00 00 10 00 01 00 2b 00 00 00 ce 90 04 08 |........+.......|
000003c0 00 00 00 00 10 00 f1 ff 37 00 00 00 ce 90 04 08 |........7.......|
000003d0 00 00 00 00 10 00 f1 ff 3e 00 00 00 d0 90 04 08 |........>.......|
000003e0 00 00 00 00 10 00 f1 ff 00 6d 69 63 6b 65 79 4d |.........mickeyM|
000003f0 6f 75 73 65 2e 61 73 6d 00 48 65 6c 6c 6f 00 4d |ouse.asm.Hello.M|
00000400 6f 75 73 65 00 6c 66 6c 66 6c 66 00 5f 73 74 61 |ouse.lflflf._sta|
00000410 72 74 00 5f 5f 62 73 73 5f 73 74 61 72 74 00 5f |rt.__bss_start._|
00000420 65 64 61 74 61 00 5f 65 6e 64 00 |edata._end.|
0000042b
- click here for solution.
