Why not simply:
mov eax, 0AABBCCDDh
bswap eax
I am not sure what you are trying to do in your program, but can say what the CPU actually tries to do (but can't and that is why crashes):
This one:
XOR BYTE PTR [eax], al
Tries to compute an xor operation of the value in the register AL (byte sized) and a value of the byte in memory at address 0AABBCCDDh (the content of EAX register). As long as on this address there is no any memory allocated by the OS, the program crashes with GPF.
The proper byte swapping without using bswap is the following (Thanks to X.J):
xchg ah, al
ror eax, 16
xchg ah, al.