Re: [Qemu-devel] Re: Suggestion - trap window-close of VM

[Lennert Buytenhek]

On Wed, Mar 30, 2005 at 02:20:36PM +0200, Struan Bartlett wrote:

> It subtracts one from the EIP (to find the address of 
> the previously-executed instruction) and examines the virtual memory 
> location pointed to. If the memory location contains 0xF4 (HLT) then it 
> examines the EFLAGS register. If the IF (Interrupt-enable) flag is 
> cleared, then one might in fact assume that Windows 2000 is sitting 
> there just waiting for you to turn it off. The assumption here is that 
> if interrupts are disabled then there is no way the processor's halt 
> state can be interrupted.

What happens if the previous instruction is a multi-byte instruction
that happens to have 0xf4 as its last byte?


--L