objdump

I just started learning C from a book in Linux and it told me to use objdump to look at the code in assembly. However I run into the problem that the output objdump gives me is not the same as is in the book. That other addresses are used I understand. But why is the program not executed the exact same way even know I use the same processor (x86) as is used in the book.

Sins I have not found out yet how I can copy text from the command line in my virtual box in windows I can only give you the example from the book. What I am reffering to is the 3th and 4th column the left.

Example:

Code:

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reader:~/booksrc $ objdump -M intel -D a.out | grep -A20 main.:
08048374 <main>:
 8048374:      55                      push  ebp
 8048375:      89 e5                  mov    ebp,esp
 8048377:      83 ec 08                sub    esp,0x8
 804837a:      83 e4 f0                and    esp,0xfffffff0
 804837d:      b8 00 00 00 00          mov    eax,0x0
 8048382:      29 c4                  sub    esp,eax
 8048384:      c7 45 fc 00 00 00 00    mov    DWORD PTR [ebp-4],0x0
 804838b:      83 7d fc 09            cmp    DWORD PTR [ebp-4],0x9
 804838f:      7e 02                  jle    8048393 <main+0x1f>
 8048391:      eb 13                  jmp    80483a6 <main+0x32>
 8048393:      c7 04 24 84 84 04 08    mov    DWORD PTR [esp],0x8048484
 804839a:      e8 01 ff ff ff          call  80482a0 <printf@plt>
 804839f:      8d 45 fc                lea    eax,[ebp-4]
 80483a2:      ff 00                  inc    DWORD PTR [eax]
 80483a4:      eb e5                  jmp    804838b <main+0x17>
 80483a6:      c9                      leave
 80483a7:      c3                      ret
 80483a8:      90                      nop
 80483a9:      90                      nop
 80483aa:      90                      nop
reader:~/booksrc $

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Don't worry about it. Unless you compiled with the *exact* same version of compiler, compilation flags, etc, you should expect some differences...

Thanks. I was getting worried I overlooked something and that I could trow the book in the trashcan.