From: Jakub Jermar <jakub@jermar.eu>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [AMD64] Possible problem with the DF flag during the SYSCALL instruction
Date: Thu, 20 Mar 2008 11:44:02 +0100 [thread overview]
Message-ID: <47E23FF2.8060505@jermar.eu> (raw)
Hi,
yesterday I tried to mask off the DF flag from the RFLAGS register
during the SYSCALL instruction by specifying this bit in the SFMASK MSR
register while running HelenOS.
With QEMU, this didn't work (but it worked in Simics, for instance), so
I suspect that there is something wrong with handling RFLAGS.DF during
SYSCALL. Anyone wants to have a look?
Regards,
Jakub
next reply other threads:[~2008-03-20 10:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-20 10:44 Jakub Jermar [this message]
2008-03-20 21:46 ` [PATCH]Re: [Qemu-devel] [AMD64] Possible problem with the DF flag during the SYSCALL instruction Jakub Jermar
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