http://tldp.org/LDP/abs/html/process-sub.html
$ diff -ur <(hexdump -C a.exe) <(hexdump -C 1e54400dcc3d41627015/a.exe)
ちなみにhexdump -Cとするとこんな感じで表示される. 16進数とASCII文字で出力
diff -ur <(hexdump -C a.exe) <(hexdump -C 1e54400dcc3d41627015/a.exe) --- /proc/self/fd/11 2014-09-16 13:13:36.875433702 +0900 +++ /proc/self/fd/12 2014-09-16 13:13:36.874433682 +0900 @@ -14,30 +14,25 @@ 000000d0 00 30 00 00 00 02 00 00 00 00 00 00 03 00 00 00 |.0..............| 000000e0 00 00 10 00 00 10 00 00 00 00 10 00 00 10 00 00 |................| 000000f0 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 |................| -00000100 00 20 00 00 9e 00 00 00 00 00 00 00 00 00 00 00 |. ..............| +00000100 00 20 00 00 4d 00 00 00 00 00 00 00 00 00 00 00 |. ..M...........| 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000170 00 00 00 00 00 00 00 00 2e 74 65 78 74 00 00 00 |.........text...| 00000180 0a 00 00 00 00 10 00 00 00 02 00 00 00 02 00 00 |................| 00000190 00 00 00 00 00 00 00 00 00 00 00 00 20 00 00 60 |............ ..`| -000001a0 2e 69 64 61 74 61 00 00 9e 00 00 00 00 20 00 00 |.idata....... ..| +000001a0 2e 69 64 61 74 61 00 00 4d 00 00 00 00 20 00 00 |.idata..M.... ..| 000001b0 00 02 00 00 00 04 00 00 00 00 00 00 00 00 00 00 |................| 000001c0 00 00 00 00 40 00 30 c0 00 00 00 00 00 00 00 00 |....@.0.........| 000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * -00000200 6a 41 ff 15 50 20 40 00 58 c3 00 00 00 00 00 00 |jA..P @.X.......| +00000200 6a 41 ff 15 30 20 40 00 58 c3 00 00 00 00 00 00 |jA..0 @.X.......| 00000210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * -00000400 3c 20 00 00 00 00 00 00 00 00 00 00 86 20 00 00 |< ........... ..| -00000410 50 20 00 00 48 20 00 00 00 00 00 00 00 00 00 00 |P ..H ..........| -00000420 91 20 00 00 5c 20 00 00 00 00 00 00 00 00 00 00 |. ..\ ..........| -00000430 00 00 00 00 00 00 00 00 00 00 00 00 64 20 00 00 |............d ..| -00000440 6e 20 00 00 00 00 00 00 78 20 00 00 00 00 00 00 |n ......x ......| -00000450 64 20 00 00 6e 20 00 00 00 00 00 00 78 20 00 00 |d ..n ......x ..| -00000460 00 00 00 00 00 00 70 75 74 63 68 61 72 00 00 00 |......putchar...| -00000470 67 65 74 63 68 61 72 00 00 00 45 78 69 74 50 72 |getchar...ExitPr| -00000480 6f 63 65 73 73 00 6d 73 76 63 72 74 2e 64 6c 6c |ocess.msvcrt.dll| -00000490 00 6b 65 72 6e 65 6c 33 32 2e 64 6c 6c 00 00 00 |.kernel32.dll...| -000004a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| +00000400 28 20 00 00 00 00 00 00 00 00 00 00 42 20 00 00 |( ..........B ..| +00000410 30 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |0 ..............| +00000420 00 00 00 00 00 00 00 00 38 20 00 00 00 00 00 00 |........8 ......| +00000430 38 20 00 00 00 00 00 00 00 00 70 75 74 63 68 61 |8 ........putcha| +00000440 72 00 6d 73 76 63 72 74 2e 64 6c 6c 00 00 00 00 |r.msvcrt.dll....| +00000450 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|