Re: [Xen-devel] Re: Exporting symbols from hypervisor

[Grzegorz MiÅoÅ <gm281@xxxxxxxxx>]

> > > Hi grzegorz,
> > > I have one more issue. I want to export do_domctl function for
> > > debugging. I did EXPORT_SYMBOL(do_domctl) its not happening. Any  
> > > idea
> > > about this.
> > Xen doesn't use modular architecture and consequently EXPORT_SYMBOL
> > macro is a no-op (see: include/xen/config.h).
> But i seen it being used in xen/common/string.c and in other ia-64
> specific src files. And those exported symbols are visible in
> System.map. Is it that during compilation of those files different
> header files are included?
System.map lists symbols for _Linux_ not Xen. So for example 'strlcpy'  
is defined in xen/common/strings.c, but also in linux-2.6.18-xen.hg/ 
lib/string.c. It is the second definition that makes it into System.map.
> > You just need to add
> > do_domctl definition to a header file. Or define it wherever you need
> > with 'extern'.
> no acutally i need to debug do_domctl instruction by instruction using
> kdb, and kdb dosent recognize the it, so i thought of exporting it.
I've never used kdb to debug Xen. Are you using 
http://xenbits.xensource.com/ext/debuggers.hg?

Cheers
Gr(z)egor(z)

BTW: Can you reply to the list, not me personally? It'd make it easier  
for me to reply.
> > Cheers
> > Gr(z)egor(z)
> > > Sorry to bother you again and again.
> > >
> > > Thanks very much.
> > > Sandesh
> > >
> > > On Tue, 2008-06-10 at 14:52 +0100, Grzegorz MiÅoÅ wrote:
> > > > > > I did really mean:
> > > > > > xm dmesg
> > > > > ok xm dmesg is showing the stuff.
> > > > > thanks for the info.
> > > > > Does this mean that the printk's print it to the xenstore??
> > > > I don't think it is stored in xenstore itself, but yes, it is
> > > > buffered
> > > > in Dom0.
> > > > > > >
> > > > > > Xen can be configured to output it's messages on the serial line,
> > > > > > and
> > > > > > it also puts it in a buffer (console ring) for Dom0's  
> > > > > > attention, xm
> > > > > > dmesg should print all the hypervisors output.
> > > > > how to enable this???
> > > > > by default it does'nt print it on the serial console.
> > > > add the following command line options to your xen configuration
> > > > (bootloader config):
> > > > com1=115200,8n1 console=com1,tty
> > > >
> > > > Cheers
> > > > Gr(z)egor(z)
> > >
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