Re: [Qemu-devel] -icount changes physical address assignments in QEMU 2.10/2.11

[alarson]

"Peter Maydell" <address@hidden> wrote on 04/05/2018 12:28:01 
PM:

> From: "Peter Maydell" <address@hidden>
> To: address@hidden
> Cc: "QEMU Developers" <address@hidden>
> Date: 04/05/2018 12:28 PM
> Subject: Re: [Qemu-devel] -icount changes physical address assignments 
in QEMU 2.10/2.11
> 
> On 5 April 2018 at 17:44,  <address@hidden> wrote:
> > "Peter Maydell" <address@hidden> wrote on 04/05/2018 
09:05:53
> > AM:
> >> I've just tried your attached test image ...
> >
> > Curious.  I just downloaded qemu-2.12.0-rc2.tar.xz and built it using
> > Cygwin (a version from about a month ago) using mingw compilers
> > (mingw64-i686-gcc-g++ 6.4.0), and I still see the issue when the
> > resulting QEMU binary is run using -icount 2 against my test binary,
> > but not when run without -icount.  Here are the commands used:
> >
> > ../qemu-2.12.0-rc2/configure --python=/usr/bin/python \
> >    '--with-pkgversion=DDCI QEMU 2.12.0-rc2' \
> >    --prefix=/usr/local/qemu \
> >    --enable-sdl --with-sdlabi=2.0 \
> >    '--target-list=aarch64-softmmu ppc64-softmmu x86_64-softmmu' \
> >    --cross-prefix=i686-w64-mingw32-
> > /usr/bin/make -Otarget -j 8
> >
> > Any suggestions of things to try?
> 
> Can you reproduce the problem on a Linux host? It would
> be interesting to identify if this is a Windows-host
> specific issue somehow.

Linux "works".  I installed ubuntu 17.10 in a VM on my windows box, 
recompiled QEMU 2.12.0-rc2 (same sources as above), using a configure 
line the same as above except omitting --cross-prefix and --with-sdlabi.
Both with "-icount 2" and without show expected results.

I installed a fresh Cygwin with just the packages suggested at
https://wiki.qemu.org/Hosts/W32#Native_builds_with_Mingw-w64 (plus
some obviously missing ones like python, make, etc.) and the problem 
persists.  The updated configure line is:

../qemu-2.12.0-rc2/configure \
    '--with-pkgversion=DDCI QEMU 2.12.0-rc2' \
    --prefix=/usr/local/qemu \
    '--target-list=aarch64-softmmu ppc64-softmmu x86_64-softmmu' \
    --cross-prefix=i686-w64-mingw32-