Pretty much I've been working on my (basic) disassembler, everything works fine but after disassembling some bytes I noticed something weird:
This is the set of instructions I'm trying to decode:
unsigned char Data[] = {
0xF0, 0xF0, 0x55, 0xFF, 0x89, 0xE5, 0xB8, 0x04, 0x00, 0x00, 0x00, 0x40, 0x48, 0xC3, 0xF4,
0xCC, 0xCC, 0xCC, 0x66, 0xE7, 0xFF, 0xF0
};
and this is the Disassembler's output:
The 00 00 (ADD [AL], AL) is weird to me: moving the value of al into the address at al doesn't seem right. I am wondering if my output is correct...
I also tested it against defuse.ca's online disassembler, and this is what I got from there:
Disassembly:
0: f0 f0 55 lock lock push ebp
3: ff 89 e5 b8 04 00 dec DWORD PTR [ecx+0x4b8e5]
9: 00 00 add BYTE PTR [eax],al
b: 40 inc eax
c: 48 dec eax
d: c3 ret
e: f4 hlt
f: cc int3
10: cc int3
11: cc int3
12: 66 e7 ff out 0xff,ax
15: f0 lock