[vbox-dev] recompiler msvc port
Nikolay Igotti
Nikolay.Igotti at Sun.COM
Mon Jul 20 13:34:18 GMT 2009
Hi Huihong,
There are 2 places to look at:
- global variable assigned to a register (see SAVE_GLOBAL_REGISTER in
osdep.h), using syntax
register host_reg_t globalVariable asm("r14");
See no easy way to fix it (unlikly MSVC has such feature as binding
variable to a register permanently),
other than explicit syncing globals into the register on entry to
the generated code prologue.
- calling convention (that's what likely bites you) - you need to fix
the way TCG calls external functions,
to adopt MSVC calling convention (i.e. which argument goes into
which register).
As I said, it's not really easy, yet feasible.
Thanks,
Nikolay
Huihong Luo wrote:
> Hi Nikolay,
>
> I built the recompiler with vs2005 after removing C99 features etc.
> However, it does not work, throwing "Invalid Instruction" at runtime.
>
> You've mentioned about "global registers variables", can you be more
> specific as what code to change? and any hardcoded stuff that needs to
> be ported? such as host register env, calling conventions, etc. Let me
> know any info that may save the efforts.
>
> Right now, I am working on 32-bit.
>
> - Huihong
>
>
> --- On *Wed, 7/15/09, Nikolay Igotti /<Nikolay.Igotti at Sun.COM>/* wrote:
>
>
> From: Nikolay Igotti <Nikolay.Igotti at Sun.COM>
> Subject: Re: [vbox-dev] Is gcc 3.3.x really necessary to compile
> the recompiler?
> To: "Huihong Luo" <huisinro at yahoo.com>
> Cc: "VirtualBox developer's list" <vbox-dev at virtualbox.org>
> Date: Wednesday, July 15, 2009, 2:26 AM
>
> Hi Huihong,
>
> Don't think MSVC compilation can be easily done (C compiler in
> MSVC also don't support C99, whose array initialization by index
> feature is heavily used).
> Maybe easier will be to use MinGW64. Cross compilation process is
> just a compilation with cross-compiler :) - you build GCC as
> Windows executable capable to produce Linux binaries. There are
> docs on the net. GCC version is around 3.4, IIRC.
>
> Thanks,
> Nikolay.
>
>
>
> Huihong Luo пишет:
> > Hi Nilolay,
> > I will give it a try to see if msvc++ compilation of recompiler
> can be easily done.
> > In the meantime, can you give some details on the cross
> compilation process? which tool are you using? which version? more
> info is highly appreciated.
> > Thanks for your very helpful info thus far,
> > Huihong
> >
> > --- On *Tue, 7/14/09, Nikolay Igotti /<Nikolay.Igotti at Sun.COM
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>>/*
> wrote:
> >
> >
> > From: Nikolay Igotti <Nikolay.Igotti at Sun.COM
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>>
> > Subject: Re: [vbox-dev] Is gcc 3.3.x really necessary to compile
> > the recompiler?
> > To: "Huihong Luo" <huisinro at yahoo.com
> <http://us.mc343.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com>>
> > Cc: "VirtualBox developer's list" <vbox-dev at virtualbox.org
> <http://us.mc343.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org>>
> > Date: Tuesday, July 14, 2009, 12:25 PM
> >
> > Hi Huihong,
> >
> > Actually this file is built on Windows using cross-compiler for
> > Linux target :). It's being built this way, because there was no
> > good MinGW for 64-bit at times it was done, and REM relies
> on GCC
> > extensions (notably global registers variables and some FP
> stuff)
> > to function correctly. Right approach would be to rebuild
> > recompiler with MSVC eventually, but it needs a volunteer (I
> think
> > it was done for QEMU, so should be feasible).
> > Also if taking MinGW64 approach don't forget calling convention
> > difference on AMD64 between Linux and Windows. REM relies on
> that
> > too (not too hard to fix, for sure, just need a bit of
> > understanding in TCG).
> >
> > If you (or someone else on this list ) will do that - I can help
> > with getting patch integrated (never found enough time/desire to
> > do that myself).
> >
> > Thanks,
> > Nikolay.
> >
> >
> > Huihong Luo пишет:
> > > Hi Nikolay,
> > > Thanks for the clarification. It's much easier without
> sticking
> > to the old gcc version.
> > > Yes, I noticed that VBoxRem2.rel is an ELF image. Can you
> > explain how this file is built? I assume it's done on Linux. Do
> > you use mingw toolchain on linux to do the cross compile? Since
> > it's ELF image, perhaps it's built from pure linux gcc (w/o
> cross
> > compile to windows)?
> > > I am trying to eliminate VBoxREM2.rel on windows using
> MingW64,
> > in other words, combining the current VBoxREM.dll + VBoxREM2.rel
> > ==> VBoxREM.dll
> > > Thanks,
> > > Huihong
> > >
> > > --- On *Tue, 7/14/09, Nikolay Igotti
> /<Nikolay.Igotti at Sun.COM
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>
> >
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>>/*
> > wrote:
> > >
> > >
> > > From: Nikolay Igotti <Nikolay.Igotti at Sun.COM
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>
> >
> <http://us.mc343.mail.yahoo.com/mc/compose?to=Nikolay.Igotti@Sun.COM>>
> > > Subject: Re: [vbox-dev] Is gcc 3.3.x really necessary
> to compile
> > > the recompiler?
> > > To: "Huihong Luo" <huisinro at yahoo.com
> <http://us.mc343.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com>
> >
> <http://us.mc343.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com>>
> > > Cc: "VirtualBox developer's list"
> <vbox-dev at virtualbox.org
> <http://us.mc343.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org>
> >
> <http://us.mc343.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org>>
> > > Date: Tuesday, July 14, 2009, 2:24 AM
> > >
> > > Hi Huihong,
> > >
> > >
> > > Recompiler should build OK with recent gcc. Gcc 3
> limitation was
> > > applicable to 'old' recompiler, not relying on TCG for
> > > codegeneration. Windows 64-bit REM is built to ELF image,
> > not PE,
> > > thus MinGW shall be of little help to you.
> > >
> > > Thanks,
> > > Nikolay.
> > >
> > >
> > > Huihong Luo wrote:
> > > > The reason I asked is that gcc 4.4.3 seems to be working
> > fine on
> > > linux, so I am very confused about gcc requirement.
> > > > I am trying to use the latest gcc4.4.0 mingw64 bit
> on amd64 to
> > > build the recompiler, would this be a problem?
> > > > Does 3.3.x requirement only apply to mingw32? in
> other cases,
> > > gcc 4 is OK?
> > > > Thanks,
> > > >
> > > >
> > >
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