GELI BIOS weirdness
Eric McCorkle
eric at metricspace.net
Mon Feb 13 20:58:54 UTC 2017
On 02/13/2017 15:36, Dimitry Andric wrote:
> This disassembles to:
>
> 0: 66 0f 38 f6 f0 adcx %eax,%esi
> 5: 31 c6 xor %eax,%esi
> 7: 8b 4d 14 mov 0x14(%ebp),%ecx
> a: 89 cf mov %ecx,%edi
> c: c1 ff 1f sar $0x1f,%edi
> f: 8b .byte 0x8b
Note that this was truncated, so the sar and .byte are probably a
truncated instruction.
Also, when I had printfs in place, I could see the call instructions.
> My first guess would be that the code simply jumped into garbage. But
> can you post the complete .o file somewhere for inspection?
Attached.
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