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Re: [Qemu-devel] [PATCH] User mode: Handle x86_64 vsyscall


From: malc
Subject: Re: [Qemu-devel] [PATCH] User mode: Handle x86_64 vsyscall
Date: Sun, 7 Feb 2010 06:11:12 +0300 (MSK)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Sun, 7 Feb 2010, Jamie Lokier wrote:

> Laurent Desnogues wrote:
> > On Sat, Feb 6, 2010 at 8:49 AM, Stefan Weil <address@hidden> wrote:
> > [...]
> > > I tested two different hosts with x86_64-linux-user:
> > >
> > > * 32 bit Intel (i386) - does not work with your patch
> > 
> > For me x86_64 on i386 has always failed without
> > even calling vsyscall :-)
> > 
> > > * 64 bit AMD (x86_64)  - works with your patch
> 
> It's a bit worrying that it depends on the host architecture at all.
> 
> How well does x86_64-linux-user emulation work on non-x86 hosts?

x64user$ uname -a                                                               
Linux linmac 2.6.32.3 #4 Sun Jan 31 09:52:58 MSK 2010 ppc 7447A, altivec 
supported PowerMac10,2 GNU/Linux
x64user$ x86_64-linux-user/qemu-x86_64 -L ~/x/lut/gnemul/qemu-x86_64/ 
~/x/lut/x86_64/uname -a
Linux linmac 2.6.32.3 #4 Sun Jan 31 09:52:58 MSK 2010 x86-64 unknown

[..snip..]

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