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Re: [Qemu-devel] Stack corruption problem with SeaBIOS/gPXE under QEMU

From: Avi Kivity
Subject: Re: [Qemu-devel] Stack corruption problem with SeaBIOS/gPXE under QEMU
Date: Wed, 18 Nov 2009 16:21:34 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20090922 Fedora/3.0-3.9.b4.fc12 Thunderbird/3.0b4

On 11/18/2009 04:19 PM, Gleb Natapov wrote:

Do we have the same problem with tpr patching rom (vapic,bin)? It modifies
itself too.
But a reset will reload it.

Correct, but Kevin says "sendkey ctrl-alt-delete" jumps to SeaBIOS's
reboot vector without issuing system reset. I am talking about this situation.

That's only if we're in the bios. If an OS has taken over, it will issue a proper reset. If an OS has not taken over (DOS won't, probably) then it isn't Windows and the vapic payload hasn't had a chance to modify itself.

Do not meddle in the internals of kernels, for they are subtle and quick to 

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