Homework 2 grading information.

To grade hw2 we first built an executable from your source code,
then ran objdump on it to find the address of the function "_start"
(which is added by the linker). Note that the actual machine code
for the function start is always the same, it does not depend on your
program (so we know the correct byte values starting at this address).

You can do this yourself with the following command:

objdump -d hw2 | grep "<_start>"

The output will include a line from objdump that identifies the
address of the function _start. Now we use this address to test your
program, the output below shows the correct values (the addresses
may be different for you, the address was derived from the procedure
above).

> ./hw2 0804843c x
0804843c: 55
0804843d: 89
0804843e: e5
0804843f: 83
08048440: ecq
> ./hw2 0804843c b
0804843c: 01010101
0804843d: 10001001
0804843e: 11100101
0804843f: 10000011
08048440: 11101100q
> ./hw2 0804843c d
0804843c: 85
0804843d: 137
0804843e: 229
0804843f: 131
08048440: 236q