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