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lazenca0x0@ubuntu:~/Exploit/SROP$ readelf --notes ./srop64

Displaying notes found at file offset 0x00000254 with length 0x00000020:
  Owner                 Data size	Description
  GNU                  0x00000010	NT_GNU_ABI_TAG (ABI version tag)
    OS: Linux, ABI: 2.6.32

Displaying notes found at file offset 0x00000274 with length 0x00000024:
  Owner                 Data size	Description
  GNU                  0x00000014	NT_GNU_BUILD_ID (unique build ID bitstring)
    Build ID: f6e771e085786307e61f4d6a7abeabce684fb7c88bc6a6d7b9f016893a86290ec9ed1b41769e9cfc
lazenca0x0@ubuntu:~/Exploit/SROP$ gdb -q ./srop64
gdb-peda$ b *0x0000000000400756
Breakpoint 1 at 0x400756
gdb-peda$ r
Starting program: /home/lazenca0x0/Exploit/SROP/srop64 
Hello SROP
Breakpoint 1, 0x0000000000400756 in vuln ()
gdb-peda$ vmmap
Start              End                Perm	Name
...
0x00007ffffffde000 0x00007ffffffff000 rw-p	[stack]
0xffffffffff600000 0xffffffffff601000 r-xp	[vsyscall]
gdb-peda$ x/3i 0xffffffffff600000
   0xffffffffff600000:	mov    rax,0x60
   0xffffffffff600007:	syscall 
   0xffffffffff600009:	ret    
gdb-peda$