# bof-level2 tutorial

1. check the program with gdb


```bash

gdb ./stack-ovfl-32

  gdb-peda$ disas main
  Dump of assembler code for function main:
     0x08048630 <+0>:	lea    0x4(%esp),%ecx
     0x08048634 <+4>:	and    $0xfffffff0,%esp
     0x08048637 <+7>:	pushl  -0x4(%ecx)
     0x0804863a <+10>:	push   %ebp
     0x0804863b <+11>:	mov    %esp,%ebp
     0x0804863d <+13>:	push   %ecx
     0x0804863e <+14>:	sub    $0x4,%esp
     0x08048641 <+17>:	call   0x8048613 <non_main_func>
     0x08048646 <+22>:	mov    $0x0,%eax
     0x0804864b <+27>:	add    $0x4,%esp
     0x0804864e <+30>:	pop    %ecx
     0x0804864f <+31>:	pop    %ebp
     0x08048650 <+32>:	lea    -0x4(%ecx),%esp
     0x08048653 <+35>:	ret
  End of assembler dump.
```

more to come ...