Source Code:
char buf[256];

int main(int argv,char **argc) {
	char *pbuf=(char*)malloc(256);
//	gets(buf);
	strcpy(buf,argc[1]);
	free(pbuf);
}


Memory Layout Diagram:
+--------------+ <---0x08049680
|AAAAAAAAAAAAAA| \         
|AAAAAAAAAAAAAA|  |
|AAAAAAAAAAAAAA|  |
|AAAAAAAAAAAAAA|  |<--buf[256] (2440 Bytes?!?)
|AAAAAAAAAAAAAA|  |
|AAAAAAAAAAAAAA|  |
|AAAAAAAAAAAAAA| /
+--------------+ <---0x0804a008
|  0xFFFFFFFC  | \
+--------------+ |
|  0xFFFFFFFC  | |
+--------------+ |<---pbuf (
|  AAAAAAAA    | |
+--------------+ |
| .dtors - 12  | |
+--------------+ |
|  shellcode   | /
+--------------+