5	       printf("%s\n", "Execution Hijacked");
6	  }
7	
8	  void function(char *str) {
9	       char buffer[5];
10	       strcpy(buffer,str);
11	  }
12	  void main(int argc, char *argv[])
13	   {
14	       function(argv[1]);
1	#include <string.h>
2	#include <stdio.h>
3	
4	  void overflowed() {
5	       printf("%s\n", "Execution Hijacked");
6	  }
7	
8	  void function(char *str) {
9	       char buffer[5];
10	       strcpy(buffer,str);
11	  }
12	  void main(int argc, char *argv[])
13	   {
14	       function(argv[1]);
15	       printf("%s\n","Executed normally");
16	   }
Breakpoint 1 at 0x804844b: file overflowtest.c, line 14.
Breakpoint 2 at 0x804842e: file overflowtest.c, line 10.
Breakpoint 3 at 0x8048440: file overflowtest.c, line 11.
Num     Type           Disp Enb Address    What
1       breakpoint     keep y   0x0804844b in main at overflowtest.c:14
2       breakpoint     keep y   0x0804842e in function at overflowtest.c:10
3       breakpoint     keep y   0x08048440 in function at overflowtest.c:11
Starting program: /home/lstudent/lab/overflowtest AAAA

Breakpoint 1, main (argc=2, argv=0xbffff4c4) at overflowtest.c:14
14	       function(argv[1]);
0xbffff400:	0x0016d4a5	0x0011e030	0x0804848b	0x00293ff4
0xbffff410:	0x08048480	0x00000000	0xbffff498	0x00154bd6
0xbffff420:	0x00000002	0xbffff4c4	0xbffff4d0	0x0012f858
0xbffff430:	0xbffff480	0xffffffff	0x0012bff4	0x0804826d
0xbffff418:	0xbffff498
Currently logging to "gdb.txt".
Logs will be appended to the log file.
Output will be logged and displayed.
Currently logging to "gdb.txt".
Logs will be appended to the log file.
Output will be logged and displayed.
Continuing.

Breakpoint 2, function (str=0xbffff65c "AAAA") at overflowtest.c:10
10	       strcpy(buffer,str);
0xbffff3d0:	0x00293ff4	0x08049ff4	0xbffff3e8	0x0804830c
0xbffff3e0:	0x0011e030	0x08049ff4	0xbffff418	0x08048499
0xbffff3f0:	0x00294324	0x00293ff4	0xbffff418	0x0804845b
0xbffff400:	0xbffff65c	0x0011e030	0x0804848b	0x00293ff4
0xbffff3f8:	0xbffff418
Dump of assembler code for function main:
   0x08048442 <+0>:	push   %ebp
   0x08048443 <+1>:	mov    %esp,%ebp
   0x08048445 <+3>:	and    $0xfffffff0,%esp
   0x08048448 <+6>:	sub    $0x10,%esp
   0x0804844b <+9>:	mov    0xc(%ebp),%eax
   0x0804844e <+12>:	add    $0x4,%eax
   0x08048451 <+15>:	mov    (%eax),%eax
   0x08048453 <+17>:	mov    %eax,(%esp)
   0x08048456 <+20>:	call   0x8048428 <function>
   0x0804845b <+25>:	movl   $0x8048543,(%esp)
   0x08048462 <+32>:	call   0x8048350 <puts@plt>
   0x08048467 <+37>:	leave  
   0x08048468 <+38>:	ret    
End of assembler dump.
Continuing.

Breakpoint 3, function (str=0xbffff65c "AAAA") at overflowtest.c:11
11	  }
0xbffff3d0:	0xbffff3eb	0xbffff65c	0xbffff3e8	0x0804830c
0xbffff3e0:	0x0011e030	0x08049ff4	0x41fff418	0x00414141
0xbffff3f0:	0x00294324	0x00293ff4	0xbffff418	0x0804845b
0xbffff400:	0xbffff65c	0x0011e030	0x0804848b	0x00293ff4
0xbffff3f8:	0xbffff418