[Xen-bugs] [Bug 1108] New: [Dom0] Segmentation fault when 32e Dom0 chroot to 32pae root file system

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1108

           Summary: [Dom0] Segmentation fault when 32e Dom0 chroot to 32pae
                    root file system
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yongkang.you@xxxxxxxxx


Environment:
------------
Service OS (ia32/ia32e/IA64): IA32e
Guest OS (ia32/ia32e/IA64): IA32e
Change Set: At least 16281~16366
Hardware: Clovertown

Bug detailed description:
--------------------------
In (and before) xen-unstable #16157, 64bit Dom0 can do a chroot into a
32bit root file system. 
But since #16281, when doing chroot from 64 Dom0 to 32bit root file
system, it would report "Segmentation Fault". It is still okay to chroot to a
64bit file system. 

And this issue won't happen, if just booting up Dom0 and without doing any HVM
domain creating operations. 

I tried with Native 64bit Linux, this operation is okay. So I think it
is a new issue. I have reported it mailling list.

Reproduce steps:
----------------
1. /dev/sda1 is 64bit Dom0 system; sda2 is a 32bit Linux system.
2. Boot to sda1 Dom0.
3. Create a HVM domain.
4. mount /dev/sda2 /mnt/sda2
5. chroot /mnt/sda2


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