64 bit decoding error

[tpresche]

Hi,

I think I have found a bug with either the library or the udcli tool. For testing purposes I assembled the following program (nasm syntax):

mov eax, ebx
mov [ecx], eax
push qword [r8]
sfence
iretq

I created an object file using nasm and converted the object file code into binary using objcopy. When I disassemble the object file using objdump I see the follwing (and correct) output:

objdump -d test.o
0: 89 d8 mov %ebx,%eax
2: 67 89 01 mov %eax,(%ecx)
5: 41 ff 30 pushq (%r8)
8: 0f ae f8 sfence
b: 48 cf iretq

When I use udcli with the binary file I get the following (incorrect) output:

./udcli < test.bin
0000000000000000 89d8 mov eax, ebx
0000000000000002 678901 mov [bx+di], eax
0000000000000005 41 inc ecx
0000000000000006 ff30 push dword [eax]
0000000000000008 0faef8 sfence
000000000000000b 48 dec eax
000000000000000c cf iretd

[tpresche]

forgot to use -64 switch. Ignore