problems compiling xen on a crusoe

problems compiling xen on a crusoe

[A Streetcar Named]

Hi.

I'm trying to compile Xen 2.0 on a crusoe-powered notebook, but make
world seems to fail when making xen, even before building tools or the
kernel.  This is on a transmeta crusoe 5800 CPU, running Gentoo.

Any idea what might be wrong?  I have no idea what the error message
below means.

# make world
make clean
[snip]
 __  __            ____    ___
 \ \/ /___ _ __   |___ \  / _ \
  \  // _ \ '_ \    __) || | | |
  /  \  __/ | | |  / __/ | |_| |
 /_/\_\___|_| |_| |_____(_)___/

make[3]: Leaving directory `/root/xen/t/xen-2.0/xen'
make -C common
make[3]: Entering directory `/root/xen/t/xen-2.0/xen/common'
gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
-iwithprefix include -Wall -Werror -pipe
-I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
-O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
ac_timer.c -o ac_timer.o
gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
-iwithprefix include -Wall -Werror -pipe
-I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
-O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
dom0_ops.c -o dom0_ops.o
dom0_ops.c: In function `do_dom0_op':
/root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
register in class `BREG' while reloading `asm'
/root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
register in class `BREG' while reloading `asm'
make[3]: *** [dom0_ops.o] Error 1
make[3]: Leaving directory `/root/xen/t/xen-2.0/xen/common'
make[2]: *** [/root/xen/t/xen-2.0/xen/xen] Error 2
make[2]: Leaving directory `/root/xen/t/xen-2.0/xen'
make[1]: *** [xen] Error 2
make[1]: Leaving directory `/root/xen/t/xen-2.0'
make: *** [world] Error 2


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Re: problems compiling xen on a crusoe

[Keir Fraser]

What GCC version are you using (gcc --version)?

 -- Keir

> Hi.
> 
> I'm trying to compile Xen 2.0 on a crusoe-powered notebook, but make
> world seems to fail when making xen, even before building tools or the
> kernel.  This is on a transmeta crusoe 5800 CPU, running Gentoo.
> 
> Any idea what might be wrong?  I have no idea what the error message
> below means.
> 
> # make world
> make clean
> [snip]
>  __  __            ____    ___
>  \ \/ /___ _ __   |___ \  / _ \
>   \  // _ \ '_ \    __) || | | |
>   /  \  __/ | | |  / __/ | |_| |
>  /_/\_\___|_| |_| |_____(_)___/
> 
> make[3]: Leaving directory `/root/xen/t/xen-2.0/xen'
> make -C common
> make[3]: Entering directory `/root/xen/t/xen-2.0/xen/common'
> gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> -iwithprefix include -Wall -Werror -pipe
> -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> ac_timer.c -o ac_timer.o
> gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> -iwithprefix include -Wall -Werror -pipe
> -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> dom0_ops.c -o dom0_ops.o
> dom0_ops.c: In function `do_dom0_op':
> /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> register in class `BREG' while reloading `asm'
> /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> register in class `BREG' while reloading `asm'
> make[3]: *** [dom0_ops.o] Error 1
> make[3]: Leaving directory `/root/xen/t/xen-2.0/xen/common'
> make[2]: *** [/root/xen/t/xen-2.0/xen/xen] Error 2
> make[2]: Leaving directory `/root/xen/t/xen-2.0/xen'
> make[1]: *** [xen] Error 2
> make[1]: Leaving directory `/root/xen/t/xen-2.0'
> make: *** [world] Error 2
> 
> 
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> Xen-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/xen-devel



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Re: problems compiling xen on a crusoe

[A Streetcar Named]

gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1, ssp-3.3.2-2,
pie-8.7.6)

On Sun, 14 Nov 2004 09:45:11 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> 
> What GCC version are you using (gcc --version)?
> 
>  -- Keir
> 
> 
> 
> > Hi.
> >
> > I'm trying to compile Xen 2.0 on a crusoe-powered notebook, but make
> > world seems to fail when making xen, even before building tools or the
> > kernel.  This is on a transmeta crusoe 5800 CPU, running Gentoo.
> >
> > Any idea what might be wrong?  I have no idea what the error message
> > below means.
> >
> > # make world
> > make clean
> > [snip]
> >  __  __            ____    ___
> >  \ \/ /___ _ __   |___ \  / _ \
> >   \  // _ \ '_ \    __) || | | |
> >   /  \  __/ | | |  / __/ | |_| |
> >  /_/\_\___|_| |_| |_____(_)___/
> >
> > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > make -C common
> > make[3]: Entering directory `/root/xen/t/xen-2.0/xen/common'
> > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > -iwithprefix include -Wall -Werror -pipe
> > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > ac_timer.c -o ac_timer.o
> > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > -iwithprefix include -Wall -Werror -pipe
> > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > dom0_ops.c -o dom0_ops.o
> > dom0_ops.c: In function `do_dom0_op':
> > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > register in class `BREG' while reloading `asm'
> > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > register in class `BREG' while reloading `asm'
> > make[3]: *** [dom0_ops.o] Error 1
> > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen/common'
> > make[2]: *** [/root/xen/t/xen-2.0/xen/xen] Error 2
> > make[2]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > make[1]: *** [xen] Error 2
> > make[1]: Leaving directory `/root/xen/t/xen-2.0'
> > make: *** [world] Error 2
> >
> > 
> > -------------------------------------------------------
> > This SF.Net email is sponsored by: InterSystems CACHE
> > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > robust object and relational technologies, making it a perfect match
> > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/xen-devel
> 
>


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Re: problems compiling xen on a crusoe

[Keir Fraser]

Please try adding '-nopie' to the 'CFLAGS := ...' in
xen/arch/x86/Rules.mk: 
CFLAGS  := -nopie -nostdinc -fno-builtin -fno-common -fno-strict-aliasing

If that doesn't help then also try adding '-fno-stack-protector' and
'-f-nostack-protector-all'. 

Let me know if this works out and I'll add the required options to the
the repository (may not be because non-PIE/SSP GCCs may barf on the
above command-line options). 

 -- Keir


> gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1, ssp-3.3.2-2,
> pie-8.7.6)
> 
> On Sun, 14 Nov 2004 09:45:11 +0000, Keir Fraser
> <keir.fraser@cl.cam.ac.uk> wrote:
> > 
> > What GCC version are you using (gcc --version)?
> > 
> >  -- Keir
> > 
> > 
> > 
> > > Hi.
> > >
> > > I'm trying to compile Xen 2.0 on a crusoe-powered notebook, but make
> > > world seems to fail when making xen, even before building tools or the
> > > kernel.  This is on a transmeta crusoe 5800 CPU, running Gentoo.
> > >
> > > Any idea what might be wrong?  I have no idea what the error message
> > > below means.
> > >
> > > # make world
> > > make clean
> > > [snip]
> > >  __  __            ____    ___
> > >  \ \/ /___ _ __   |___ \  / _ \
> > >   \  // _ \ '_ \    __) || | | |
> > >   /  \  __/ | | |  / __/ | |_| |
> > >  /_/\_\___|_| |_| |_____(_)___/
> > >
> > > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > > make -C common
> > > make[3]: Entering directory `/root/xen/t/xen-2.0/xen/common'
> > > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > > -iwithprefix include -Wall -Werror -pipe
> > > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > > ac_timer.c -o ac_timer.o
> > > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > > -iwithprefix include -Wall -Werror -pipe
> > > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > > dom0_ops.c -o dom0_ops.o
> > > dom0_ops.c: In function `do_dom0_op':
> > > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > > register in class `BREG' while reloading `asm'
> > > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > > register in class `BREG' while reloading `asm'
> > > make[3]: *** [dom0_ops.o] Error 1
> > > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen/common'
> > > make[2]: *** [/root/xen/t/xen-2.0/xen/xen] Error 2
> > > make[2]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > > make[1]: *** [xen] Error 2
> > > make[1]: Leaving directory `/root/xen/t/xen-2.0'
> > > make: *** [world] Error 2
> > >
> > > 
> > > -------------------------------------------------------
> > > This SF.Net email is sponsored by: InterSystems CACHE
> > > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > > robust object and relational technologies, making it a perfect match
> > > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/xen-devel
> > 
> >



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Re: problems compiling xen on a crusoe

[A Streetcar Named]

-nopie fixed the  originally reported error, but I subsequently got
other errors that said something like "undefined reference to
`__guard'" and "undefined reference to `__stack_smash_handler'". 
Adding -fno-stack-protector seems to have solved these as well, and
I'm now compiling the kernels for the crusoe.

Thanks!

On Sun, 14 Nov 2004 15:06:49 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> 
> Please try adding '-nopie' to the 'CFLAGS := ...' in
> xen/arch/x86/Rules.mk:
> CFLAGS  := -nopie -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> 
> If that doesn't help then also try adding '-fno-stack-protector' and
> '-f-nostack-protector-all'.
> 
> Let me know if this works out and I'll add the required options to the
> the repository (may not be because non-PIE/SSP GCCs may barf on the
> above command-line options).
> 
>  -- Keir
> 
> 
> 
> 
> > gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1, ssp-3.3.2-2,
> > pie-8.7.6)
> >
> > On Sun, 14 Nov 2004 09:45:11 +0000, Keir Fraser
> > <keir.fraser@cl.cam.ac.uk> wrote:
> > >
> > > What GCC version are you using (gcc --version)?
> > >
> > >  -- Keir
> > >
> > >
> > >
> > > > Hi.
> > > >
> > > > I'm trying to compile Xen 2.0 on a crusoe-powered notebook, but make
> > > > world seems to fail when making xen, even before building tools or the
> > > > kernel.  This is on a transmeta crusoe 5800 CPU, running Gentoo.
> > > >
> > > > Any idea what might be wrong?  I have no idea what the error message
> > > > below means.
> > > >
> > > > # make world
> > > > make clean
> > > > [snip]
> > > >  __  __            ____    ___
> > > >  \ \/ /___ _ __   |___ \  / _ \
> > > >   \  // _ \ '_ \    __) || | | |
> > > >   /  \  __/ | | |  / __/ | |_| |
> > > >  /_/\_\___|_| |_| |_____(_)___/
> > > >
> > > > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > > > make -C common
> > > > make[3]: Entering directory `/root/xen/t/xen-2.0/xen/common'
> > > > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > > > -iwithprefix include -Wall -Werror -pipe
> > > > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > > > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > > > ac_timer.c -o ac_timer.o
> > > > gcc -nostdinc -fno-builtin -fno-common -fno-strict-aliasing
> > > > -iwithprefix include -Wall -Werror -pipe
> > > > -I/root/xen/t/xen-2.0/xen/include -Wno-pointer-arith -Wredundant-decls
> > > > -O3 -fomit-frame-pointer -msoft-float -m32 -march=i686 -DNDEBUG -c
> > > > dom0_ops.c -o dom0_ops.o
> > > > dom0_ops.c: In function `do_dom0_op':
> > > > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > > > register in class `BREG' while reloading `asm'
> > > > /root/xen/t/xen-2.0/xen/include/asm/mm.h:160: error: can't find a
> > > > register in class `BREG' while reloading `asm'
> > > > make[3]: *** [dom0_ops.o] Error 1
> > > > make[3]: Leaving directory `/root/xen/t/xen-2.0/xen/common'
> > > > make[2]: *** [/root/xen/t/xen-2.0/xen/xen] Error 2
> > > > make[2]: Leaving directory `/root/xen/t/xen-2.0/xen'
> > > > make[1]: *** [xen] Error 2
> > > > make[1]: Leaving directory `/root/xen/t/xen-2.0'
> > > > make: *** [world] Error 2
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.Net email is sponsored by: InterSystems CACHE
> > > > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > > > robust object and relational technologies, making it a perfect match
> > > > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > > > _______________________________________________
> > > > Xen-devel mailing list
> > > > Xen-devel@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/xen-devel
> > >
> > >
> 
>


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Re: problems compiling xen on a crusoe

[Keir Fraser]

> -nopie fixed the  originally reported error, but I subsequently got
> other errors that said something like "undefined reference to
> `__guard'" and "undefined reference to `__stack_smash_handler'". 
> Adding -fno-stack-protector seems to have solved these as well, and
> I'm now compiling the kernels for the crusoe.
> 
> Thanks!

I've checked in a patch to the unstable tree that will allow to build
with PIE/SSP-enabled GCC.

 -- Keir


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Re: problems compiling xen on a crusoe

[A Streetcar Named]

On Mon, 15 Nov 2004 09:04:33 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> > -nopie fixed the  originally reported error, but I subsequently got
> > other errors that said something like "undefined reference to
> > `__guard'" and "undefined reference to `__stack_smash_handler'".
> > Adding -fno-stack-protector seems to have solved these as well, and
> > I'm now compiling the kernels for the crusoe.
> >
> I've checked in a patch to the unstable tree that will allow to build
> with PIE/SSP-enabled GCC.

Perhaps I spoke too soon.  Both Xen and the kernels compiled without
error, but rebooting into Xen doesn't seem to work.  Grub seems to try
to load the Xen kernel, then the machine spontaneously reboots.  This
seems to be the case even if I try to disable lots of stuff (below,
but the same thing happens even without noht.*)

At this point, my grub.conf has this:

title  Xen 2.0 / XenLinux 2.6.9-xen0-crusoe
kernel (hd0,4)/boot/xen.gz dom0_mem=131072 console=vga noht noacpi
noapic nosmp noreboot ignorebiostables
module (hd0,4)/boot/vmlinuz-2.6.9-xen0-crusoe root=/dev/hda8

Is there any way to see more info on what's happening after grub tries
to load xen.gz?  Perhaps I should try to recompile xen with -nopie and
-fno-stack-protector-all?

...  Okay, this is weird.  -nopie -fno-stack-protector-all seems to
fail as if stack protection was not turned off at all.  So i
recompiled Xen with -nopie -fno-stack-protector
-fno-stack-protector-all (which produced a different binary from just
the previous one without -fno-stack-protector-all), but the same
problem persists with the machine rebooting spontaneously.

Any ideas?


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Re: problems compiling xen on a crusoe

[Keir Fraser]

> Perhaps I spoke too soon.  Both Xen and the kernels compiled without
> error, but rebooting into Xen doesn't seem to work.  Grub seems to try
> to load the Xen kernel, then the machine spontaneously reboots.  This
> seems to be the case even if I try to disable lots of stuff (below,
> but the same thing happens even without noht.*)
> 
> At this point, my grub.conf has this:
> 
> title  Xen 2.0 / XenLinux 2.6.9-xen0-crusoe
> kernel (hd0,4)/boot/xen.gz dom0_mem=131072 console=vga noht noacpi
> noapic nosmp noreboot ignorebiostables
> module (hd0,4)/boot/vmlinuz-2.6.9-xen0-crusoe root=/dev/hda8
> 
> Is there any way to see more info on what's happening after grub tries
> to load xen.gz?  Perhaps I should try to recompile xen with -nopie and
> -fno-stack-protector-all?

Well, can you make your Xen image (xen-syms) available for me to
download? I'll take a look at it, since it must be crashing out very
early indeed.

If you want to find the point at which the image is crashing, you can
try the following:

Try adding 'for(;;);' as the first piece of code in cmain() in
xen/common/kernel.c. The idea is to move an infinite loop around until
the kernel hangs rather then rebooting -- you can use this to
determine which line of code is causing you to crash.

If you still crash with the infinite for-loop in place, you'll need to
add:
1:  jmp 1b

...to various places in xen/arch/boot/x86_32.S (various places after
the label '__start'). I'd start by placing it immediately before
'call cmain' as one distinct possibility is that the calling
convention for asm -> C is different for your compiler. If that
still crashes then you can start moving the loop higher up in the
assembly code.

 -- Keir


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Re: problems compiling xen on a crusoe

[Keir Fraser]

Your image boots just fine for me (at least as far as booting DOM0,
which is a lot further than you seem to think that you are getting). 

Are you definitely booting the xen.gz file, not xen-syms or anything
like that?

 -- Keir

> On Mon, 15 Nov 2004 12:04:47 +0000, Keir Fraser
> <keir.fraser@cl.cam.ac.uk> wrote:
> > 
> > Well, can you make your Xen image (xen-syms) available for me to
> > download? I'll take a look at it, since it must be crashing out very
> > early indeed.
> 
> 
> I don't know if this is relevant, but my CFLAGS in /etc/make.conf is
> "-O3 -march=i686 -pipe -fomit-frame-pointer
> -mpreferred-stack-boundary=2 -falign-functions=0 -falign-jumps=0
> -falign-loops=0"
> 
> > If you want to find the point at which the image is crashing, you can
> > try the following:
> 
> I'll give these a shot; the crusoe is kinda slow though, and I
> probably won't have the laptop this week, so I might be a bit slow
> trying this out.  Thanks again!



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Re: problems compiling xen on a crusoe

[A Streetcar Named]

On Mon, 15 Nov 2004 13:12:24 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> 
> Your image boots just fine for me (at least as far as booting DOM0,
> which is a lot further than you seem to think that you are getting).
> 
> Are you definitely booting the xen.gz file, not xen-syms or anything
> like that?

Yep, I'm definitely trying to boot xen.gz (unless the grub menu
extract I showed earlier was wrong)...

Have tried adding printk's and for (;;) {} in kernel.c - that didn't help.

The infinite loops in x86_32.S did make a difference at the following
line though:
    128 start_paging:
    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
    130         mov     %eax,%cr3
    131         mov     $0x80050033,%eax /* hi-to-lo: PG,AM,WP,NE,ET,MP,PE */
    132         mov     %eax,%cr0
    133         jmp     1f
    134 1:      /* Install relocated selectors (FS/GS unused). */
    135         lgdt    gdt_descr

Adding the 1:  jump 1b before line 132 would make it hang; adding the
line after 132 saw the computer rebooting continuously...  I have no
idea what to make of this though.


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Re: problems compiling xen on a crusoe

[Keir Fraser]

> Yep, I'm definitely trying to boot xen.gz (unless the grub menu
> extract I showed earlier was wrong)...
> 
> Have tried adding printk's and for (;;) {} in kernel.c - that didn't help.
> 
> The infinite loops in x86_32.S did make a difference at the following
> line though:
>     128 start_paging:
>     129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
>     130         mov     %eax,%cr3
>     131         mov     $0x80050033,%eax /* hi-to-lo: PG,AM,WP,NE,ET,MP,PE */
>     132         mov     %eax,%cr0
>     133         jmp     1f
>     134 1:      /* Install relocated selectors (FS/GS unused). */
>     135         lgdt    gdt_descr
> 
> Adding the 1:  jump 1b before line 132 would make it hang; adding the
> line after 132 saw the computer rebooting continuously...  I have no
> idea what to make of this though.

Hmm.... sounds like we don't work so well with Crusoe. :-)

Firstly, I don't suggest that looping between lines 132 and 133 is
very wise. The move to %cr0 and the following jump are supposed to
happen right after one another. Put the loop immediately after line
134. 

Then, a few possibilities that might get you further:

Change line 131 to:
 mov %cr0,%eax ; or $0x80050023,%eax
                             ^
                             Note this digit changed!

Change line 133 to:
 ljmp $(__HYPERVISOR_CS),$1f

Let me know how you get on with these changes.

 Cheers,
 Keir


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Re: problems compiling xen on a crusoe

[A Streetcar Named]

On Mon, 15 Nov 2004 14:44:47 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> >
> > The infinite loops in x86_32.S did make a difference at the following
> > line though:
> >     128 start_paging:
> >     129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
> >     130         mov     %eax,%cr3
> >     131         mov     $0x80050033,%eax /* hi-to-lo: PG,AM,WP,NE,ET,MP,PE */
> >     132         mov     %eax,%cr0
> >     133         jmp     1f
> >     134 1:      /* Install relocated selectors (FS/GS unused). */
> >     135         lgdt    gdt_descr
> >
> > Adding the 1:  jump 1b before line 132 would make it hang; adding the
> > line after 132 saw the computer rebooting continuously...  I have no
> > idea what to make of this though.
> 
> Hmm.... sounds like we don't work so well with Crusoe. :-)
> Firstly, I don't suggest that looping between lines 132 and 133 is
> very wise. The move to %cr0 and the following jump are supposed to
> happen right after one another. Put the loop immediately after line
> 134.

Only just got my hands on the notebook to test again.  I vaguely
remembered that I had tried putting the loop between lines 134 and 135
previously (with the result being that it still kept rebooting), which
led me to move the loop higher up.  Anyway, I've tried this again, and
confirmed what I remembered.  If you're interested, I've put my xen
images at the same location as previously, so xen-132-syms is for the
loop inserted between lines 131 and 132, etc.


> Then, a few possibilities that might get you further:
> 
> Change line 131 to:
>  mov %cr0,%eax ; or $0x80050023,%eax
>                              ^
>                              Note this digit changed!
> 
> Change line 133 to:
>  ljmp $(__HYPERVISOR_CS),$1f
> 
> Let me know how you get on with these changes.

I'm not clear what you mean by this.  Do you want me to change the
source to this and compile it?

   128 start_paging:
   129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
   130         mov     %eax,%cr3
   131         mov %cr0,%eax ; or $0x80050023,%eax
   132         mov     %eax,%cr0
   133         ljmp $(__HYPERVISOR_CS),$1f
   134 1:      /* Install relocated selectors (FS/GS unused). */
   135         lgdt    gdt_descr


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Re: problems compiling xen on a crusoe

[Keir Fraser]

> > Then, a few possibilities that might get you further:
> > 
> > Change line 131 to:
> >  mov %cr0,%eax ; or $0x80050023,%eax
> >                              ^
> >                              Note this digit changed!
> > 
> > Change line 133 to:
> >  ljmp $(__HYPERVISOR_CS),$1f
> > 
> > Let me know how you get on with these changes.
> 
> I'm not clear what you mean by this.  Do you want me to change the
> source to this and compile it?
> 
>    128 start_paging:
>    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
>    130         mov     %eax,%cr3
>    131         mov %cr0,%eax ; or $0x80050023,%eax
>    132         mov     %eax,%cr0
>    133         ljmp $(__HYPERVISOR_CS),$1f
>    134 1:      /* Install relocated selectors (FS/GS unused). */
>    135         lgdt    gdt_descr

That's right. Recompile with above changes and see if it still
reboots.

 -- Keir


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Re: problems compiling xen on a crusoe

[Adam Sulmicki]

a wild guess. does TM5800 supports 4mb pages??

On Wed, 17 Nov 2004, Keir Fraser wrote:

> > > Then, a few possibilities that might get you further:
> > >
> > > Change line 131 to:
> > >  mov %cr0,%eax ; or $0x80050023,%eax
> > >                              ^
> > >                              Note this digit changed!
> > >
> > > Change line 133 to:
> > >  ljmp $(__HYPERVISOR_CS),$1f
> > >
> > > Let me know how you get on with these changes.
> >
> > I'm not clear what you mean by this.  Do you want me to change the
> > source to this and compile it?
> >
> >    128 start_paging:
> >    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
> >    130         mov     %eax,%cr3
> >    131         mov %cr0,%eax ; or $0x80050023,%eax
> >    132         mov     %eax,%cr0
> >    133         ljmp $(__HYPERVISOR_CS),$1f
> >    134 1:      /* Install relocated selectors (FS/GS unused). */
> >    135         lgdt    gdt_descr
>
> That's right. Recompile with above changes and see if it still
> reboots.
>
>  -- Keir
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: InterSystems CACHE
> FREE OODBMS DOWNLOAD - A multidimensional database that combines
> robust object and relational technologies, making it a perfect match
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> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/xen-devel
>



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Re: problems compiling xen on a crusoe

[Keir Fraser]

A good guess (I hadn't thought of that), but the web seems to think
the TM5800 does support PSE. It is worth a check though -- boot into
native Linux and mail the output of 'cat /proc/cpuinfo'. Then we'll
know for sure. 

 -- Keir

> 
> 
> a wild guess. does TM5800 supports 4mb pages??
> 
> On Wed, 17 Nov 2004, Keir Fraser wrote:
> 
> > > > Then, a few possibilities that might get you further:
> > > >
> > > > Change line 131 to:
> > > >  mov %cr0,%eax ; or $0x80050023,%eax
> > > >                              ^
> > > >                              Note this digit changed!
> > > >
> > > > Change line 133 to:
> > > >  ljmp $(__HYPERVISOR_CS),$1f
> > > >
> > > > Let me know how you get on with these changes.
> > >
> > > I'm not clear what you mean by this.  Do you want me to change the
> > > source to this and compile it?
> > >
> > >    128 start_paging:
> > >    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
> > >    130         mov     %eax,%cr3
> > >    131         mov %cr0,%eax ; or $0x80050023,%eax
> > >    132         mov     %eax,%cr0
> > >    133         ljmp $(__HYPERVISOR_CS),$1f
> > >    134 1:      /* Install relocated selectors (FS/GS unused). */
> > >    135         lgdt    gdt_descr
> >
> > That's right. Recompile with above changes and see if it still
> > reboots.
> >
> >  -- Keir
> >
> >
> > -------------------------------------------------------
> > This SF.Net email is sponsored by: InterSystems CACHE
> > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > robust object and relational technologies, making it a perfect match
> > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/xen-devel
> >
> 



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Re: problems compiling xen on a crusoe

[A Streetcar Named]

The changes at lines 131 and 133 didn't seem to do anything (it still
keeps rebooting itself).    What does a semicolon do?

(I didn't reply yesterday as Windows seems to steal the MBR if I boot
into it, and booting from a cdrom to fix that took the better part of
half an hour yesterday, so I decided replying could wait until I found
a machine/browser that supports the javascript gmail requires...)

I didn't quite follow the discussion on 4KSTACKS and PSE, but I'll
find out what cpuinfo says when I get hold of the notebook again
tonight.

On Wed, 17 Nov 2004 21:49:52 +0000, Keir Fraser
<keir.fraser@cl.cam.ac.uk> wrote:
> 
> A good guess (I hadn't thought of that), but the web seems to think
> the TM5800 does support PSE. It is worth a check though -- boot into
> native Linux and mail the output of 'cat /proc/cpuinfo'. Then we'll
> know for sure.
>
> > a wild guess. does TM5800 supports 4mb pages??
> >
> > On Wed, 17 Nov 2004, Keir Fraser wrote:
> >
> > > > > Then, a few possibilities that might get you further:
> > > > >
> > > > > Change line 131 to:
> > > > >  mov %cr0,%eax ; or $0x80050023,%eax
> > > > >                              ^
> > > > >                              Note this digit changed!
> > > > >
> > > > > Change line 133 to:
> > > > >  ljmp $(__HYPERVISOR_CS),$1f
> > > > >
> > > > > Let me know how you get on with these changes.
> > > >
> > > > I'm not clear what you mean by this.  Do you want me to change the
> > > > source to this and compile it?
> > > >
> > > >    128 start_paging:
> > > >    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
> > > >    130         mov     %eax,%cr3
> > > >    131         mov %cr0,%eax ; or $0x80050023,%eax
> > > >    132         mov     %eax,%cr0
> > > >    133         ljmp $(__HYPERVISOR_CS),$1f
> > > >    134 1:      /* Install relocated selectors (FS/GS unused). */
> > > >    135         lgdt    gdt_descr
> > >
> > > That's right. Recompile with above changes and see if it still
> > > reboots.
> > >
> > >  -- Keir
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.Net email is sponsored by: InterSystems CACHE
> > > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > > robust object and relational technologies, making it a perfect match
> > > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/xen-devel
> > >
> >
> 
>


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Re: problems compiling xen on a crusoe

[A Streetcar Named]

processor	: 0
vendor_id	: GenuineTMx86
cpu family	: 6
model		: 4
model name	: Transmeta(tm) Crusoe(tm) Processor TM5800
stepping	: 3
cpu MHz		: 995.547
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu vme de pse tsc msr cx8 sep cmov mmx longrun lrti
bogomips	: 1966.08


On Thu, 18 Nov 2004 15:40:39 +0800, A Streetcar Named <desire@gmail.com> wrote:
> 
> I didn't quite follow the discussion on 4KSTACKS and PSE, but I'll
> find out what cpuinfo says when I get hold of the notebook again
> tonight.
> 
> On Wed, 17 Nov 2004 21:49:52 +0000, Keir Fraser
> 
> <keir.fraser@cl.cam.ac.uk> wrote:
> >
> > A good guess (I hadn't thought of that), but the web seems to think
> > the TM5800 does support PSE. It is worth a check though -- boot into
> > native Linux and mail the output of 'cat /proc/cpuinfo'. Then we'll
> > know for sure.
> >
> > > a wild guess. does TM5800 supports 4mb pages??
> > >
> > > On Wed, 17 Nov 2004, Keir Fraser wrote:
> > >
> > > > > > Then, a few possibilities that might get you further:
> > > > > >
> > > > > > Change line 131 to:
> > > > > >  mov %cr0,%eax ; or $0x80050023,%eax
> > > > > >                              ^
> > > > > >                              Note this digit changed!
> > > > > >
> > > > > > Change line 133 to:
> > > > > >  ljmp $(__HYPERVISOR_CS),$1f
> > > > > >
> > > > > > Let me know how you get on with these changes.
> > > > >
> > > > > I'm not clear what you mean by this.  Do you want me to change the
> > > > > source to this and compile it?
> > > > >
> > > > >    128 start_paging:
> > > > >    129         mov     $idle_pg_table-__PAGE_OFFSET,%eax
> > > > >    130         mov     %eax,%cr3
> > > > >    131         mov %cr0,%eax ; or $0x80050023,%eax
> > > > >    132         mov     %eax,%cr0
> > > > >    133         ljmp $(__HYPERVISOR_CS),$1f
> > > > >    134 1:      /* Install relocated selectors (FS/GS unused). */
> > > > >    135         lgdt    gdt_descr
> > > >
> > > > That's right. Recompile with above changes and see if it still
> > > > reboots.
> > > >
> > > >  -- Keir
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.Net email is sponsored by: InterSystems CACHE
> > > > FREE OODBMS DOWNLOAD - A multidimensional database that combines
> > > > robust object and relational technologies, making it a perfect match
> > > > for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> > > > _______________________________________________
> > > > Xen-devel mailing list
> > > > Xen-devel@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/xen-devel
> > > >
> > >
> >
> >
>


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Re: problems compiling xen on a crusoe

[Keir Fraser]

> > flags		: fpu vme de pse tsc msr cx8 sep cmov mmx longrun lrti
>                               ^^^
> so it should support PSE.
> 

Yeah, I have no idea what is causing the reboots. It's needs someone
to sit down and fiddle with the code a bit and see what works.

 -- Keir


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Re: problems compiling xen on a crusoe

[Jan Kundrát]

> flags		: fpu vme de pse tsc msr cx8 sep cmov mmx longrun lrti
                              ^^^
so it should support PSE.



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