Jeremy Fitzhardinge schrieb:
> Jeremy Fitzhardinge wrote:
>> Sven Köhler wrote:
>>> Also asking the devel-list for help:
>>>
>>> Sven Köhler schrieb:
>>>> Hi,
>>>>
>>>> I cannot execute any 32-bit executables. Same problem with 2.6.29-rc7.
>>>>
>>>> I compiled and linked them statically on another machine where they 
>>>> work
>>>> just fine! But inside the xen domU, they just segfault:
>>>>
>>>>
>>>> a.out[32093] general protection ip:f7f7042f sp:ffc6f2d4 error:0
>>>>
>>>>
>>>> Is this a knows problem? CONFIG_IA32_EMULATION is turned on!
>>
>> Hm, it works for me.  Can you give more detail about what you're 
>> trying to run, the kernel .config and the distro?  dmesg output would 
>> have some clues too. 
> 
> Oh, and what's the CPU?  AMD?

The host is running Xen version 3.3.0.
The host CPU is:

# cat /proc/cpuinfo
processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 15
model		: 47
model name	: AMD Athlon(tm) 64 Processor 3800+
stepping	: 2
cpu MHz		: 2399.822
cache size	: 512 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu de tsc msr pae cx8 apic mtrr cmov pat clflush mmx fxsr sse 
sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm
bogomips	: 4800.70
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

The kernel is vanilla (except for the xen/blkfront: use blk_rq_map_sg to 
generate ring entries patch). The config of my 2.6.28.7 is attached.

The program I'm trying to run is:
$ cat test.c
#include <stdio.h>

int main(void)
{
   printf("Hallo Welt!\n");
   return 0;
}

I compiled it with "gcc --static test.c" on other box where the program 
runs fine and copied the output to my domU. I checked with ldd, that it 
really isn't a dynamic executable.

The dmesg output on the domU is this mysterious:
a.out[32093] general protection ip:f7f7042f sp:ffc6f2d4 error:0

The line appears each time, that the program segfaults.


On the host, I'm using Gentoo and xen has been compiled using the 
following settings:
[ebuild   R   ] app-emulation/xen-tools-3.3.0  USE="screen -acm -api 
-custom-cflags -debug -doc -flask (-hvm) -pygrub" 0 kB
[ebuild   R   ] app-emulation/xen-3.3.0  USE="pae -acm -custom-cflags 
-debug -flask -xsm" 0 kB


If you need more info just ask.


Regards,
   Sven