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Re: [Qemu-devel] Windows 98 installer
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From: |
Avi Kivity |
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Subject: |
Re: [Qemu-devel] Windows 98 installer |
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Date: |
Tue, 25 Oct 2011 10:15:30 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 |
On 10/24/2011 08:21 PM, Michael Karcher wrote:
> If you know the 8086 architecture by heart, and also know the qemu code,
> you could get the idea that there might be an emulation bug causing the
> premature acceptance of the second interrupt (would it be accepted after
> cleaning up the stack frames, there would be no problem), namely that
> after an IRET or STI instruction, interrupts are only accepted after one
> further instruction - and only if they are still enabled.
This is true for STI (and only if interrupts were previously disabled),
not IRET.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.