[Xen-devel] Re: Compiling xenlinux 2.4.29 with grsec.. help needed

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Jan 25, 2005 at 11:11:11PM -0500, Brad Spengler wrote:
> > -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing
> > -fno-common -fomit-frame-pointer -pipe -mpreferred-stack-boundary=2
> > -march=i686    -nostdinc -iwithprefix include -DKBUILD_BASENAME=fault  -c -o
> > fault.o fault.c
> > fault.c: In function o_page_fault':
> > fault.c:135: warning: passing arg 1 of xpand_stack' from incompatible
> > pointer type
> > fault.c:135: warning: passing arg 2 of xpand_stack' makes pointer from
> > integer without a cast
> > fault.c:135: error: too few arguments to function xpand_stack'
> > make[5]: *** [fault.o] Error 1
> > make[5]: Leaving directory
> > /root/stuff/xen/xen-2.0-grsec/linux-2.4.29-xenU/arch/xen/mm'
> > make[4]: *** [first_rule] Error 2
> > make[4]: Leaving directory
> > /root/stuff/xen/xen-2.0-grsec/linux-2.4.29-xenU/arch/xen/mm'
> > make[3]: *** [_dir_arch/xen/mm] Error 2
> > make[3]: Leaving directory /root/stuff/xen/xen-2.0-grsec/linux-2.4.29-xenU'
> > make[2]: *** [build] Error 2
> > make[2]: Leaving directory /root/stuff/xen/xen-2.0-grsec'
> > make[1]: *** [linux-2.4-xenU-build] Error 2
> > make[1]: Leaving directory /root/stuff/xen/xen-2.0-grsec'
> > make: *** [kernels] Error 2
> > 
> > So it seems that some hacking is required in arch/xen/mm/fault.c .. I don't
> > have enough knowledge about linux memory management and/or grsec stuff so I
> > can't do this.. If somebody is willing to take a look at this, it would be
> > nice!
> 
> Most likely the change that has to be made is to add another argument to 
> the expand_stack calls in the file.  Change it so it looks like:
> expand_stack(current, <previous args here>);
> 
> Unless the function in which expand_stack is called has a task_struct * 
> argument passed to it.  In that case, use whatever variable name that is 
> instead of current.
> 

Thanks!

With this change, grsec patched xenlinux 2.4.29 compiles OK.
But.. the resulting kernel doesn't work. it crashes during boot. 

Well, it seems this needs more work & debugging..

-- Pasi Kärkkäinen
       
                                   ^
                                .     .
                                 Linux
                              /    -    \
                             Choice.of.the
                           .Next.Generation.


-------------------------------------------------------
This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting
Tool for open source databases. Create drag-&-drop reports. Save time
by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc.
Download a FREE copy at http://www.intelliview.com/go/osdn_nl
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel