Re: [Xen-devel] how to use the xen functions - Xin Zhao - com.xensource.lists.xen-devel

6 messages in com.xensource.lists.xen-develRe: [Xen-devel] how to use the xen fu...

From	Sent On	Attachments
Xin Zhao	01 Dec 2004 16:13
Xin Zhao	02 Dec 2004 09:42
Xin Zhao	02 Dec 2004 10:30
Keir Fraser	02 Dec 2004 12:06
Xin Zhao	02 Dec 2004 12:12
Xin Zhao	07 Dec 2004 13:31

Subject:	Re: [Xen-devel] how to use the xen functions
From:	Xin Zhao (zhao...@eecs.umich.edu)
Date:	12/07/2004 01:31:24 PM
List:	com.xensource.lists.xen-devel

I am trying to use some xen functions in both Dom0 and DomU (linux24), specifically, ctrl_if_send_message_block. But it was not exported. So I did that
myself. But after compile, insmod in Dom0 works fine but in DomU, I always got the error message that the symbole is unresolved symbol.

Why? Any trick in it?

Thanks,

Xin

On Thu, 2 Dec 2004, Keir Fraser wrote:

Linux 2.4 or 2.6? I checked in code to export those symbols now, so if you use latest 2.0-testing or unstable trees then you shouldn't have a problem.

-- Keir

Sorry, I tried your suggestion, but still have the same problem. :(

After I add the export code, I did "make ARCH=xen linux24" and "make install". Looks like the /lib/module/2.4.27-xen0 was updated. But I still get the same error message.

Here is the dump from command "grep ctrl_if_send_message_block /proc/ksyms" c01b2a30 ctrl_if_send_message_block_R__ver_ctrl_if_send_message_block

This output is DIFFERENT from a successfully exported symbol: grep create_xen_proc_entry /proc/ksyms c0326f10 create_xen_proc_entry_Ra770fe56 (Ra770fe56 is the R+version hash, right?), why ctrl_if_send_message_block has a weird ctrl_if_send_message_block_R__ver_ctrl_if_send_message_block?

If I do "nm vmlinux |grep ctrl_if_send_message_block" I got: c01b2a30 T ctrl_if_send_message_block c0376980 R __kstrtab_ctrl_if_send_message_block c0386868 R __ksymtab_ctrl_if_send_message_block

Any further idea on this?

Thanks, -x

On Thu, 2 Dec 2004, Milan [ISO-8859-1] Holzäpfel wrote:

On Wed, 1 Dec 2004 19:14:11 -0500 (EST) Xin Zhao <zhao...@eecs.umich.edu> wrote:

I need to use the function "ctrl_if_send_message_block" in my kernel module running in Dom0. This function is provided in 2.6.9-sparse/arch/xen/kernel/ctrl_if.c, however, when I tried to insert the module, I got the error message "unresolved symbol ctrl_if_send_message_block". Looks like the function is not exported. So I go to 2.6.9-sparse/arch/xen/kernel/ctrl_if.c to add the following line:

EXPORT_SYMBOL(ctrl_if_send_message_block);

But after compilation and reboot, I still got the same error message. Can someone give me some advice on how to use xen provided functions?

If you didn't do "make modules_install" after the extra export, a "depmod -a" or sth like that might help. But I'm not quite sure whether symbol resolution is done by modutils using some files in /lib/modules...

You might want to tell the list if that's what helped.

Thanks a lot.

well HTH, Milan

Milan Holzäpfel alias jagdfalke alias jag

Öff GnuPG-Schlüssel <URL:http://con.mjh.name/> GnuPG Public Key GnuPG Fingerabdruck 4C8A 5FAF 5D32 6125 89D1 GnuPG Fingerprint 0CE5 DB0C AF4F 6583 7966

http://www.deppenleerzeichen.de/

------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/

_______________________________________________ Xen-devel mailing list Xen-...@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel

-=- MIME -=- Sorry, I tried your suggestion, but still have the same problem. :(

After I add the export code, I did "make ARCH=3Dxen linux24" and "make install". Looks like the /lib/module/2.4.27-xen0 was updated. But I still get the same error message.

Here is the dump from command "grep ctrl_if_send_message_block /proc/ksyms" c01b2a30 ctrl_if_send_message_block_R__ver_ctrl_if_send_message_block

If I do "nm vmlinux |grep ctrl_if_send_message_block" I got: c01b2a30 T ctrl_if_send_message_block c0376980 R __kstrtab_ctrl_if_send_message_block c0386868 R __ksymtab_ctrl_if_send_message_block

Any further idea on this?

Thanks, -x

On Thu, 2 Dec 2004, Milan [ISO-8859-1] Holz=E4pfel wrote:

On Wed, 1 Dec 2004 19:14:11 -0500 (EST) Xin Zhao <zhao...@eecs.umich.edu> wrote:

I need to use the function "ctrl_if_send_message_block" in my kernel module running in Dom0. This function is provided in 2.6.9-sparse/arch/xen/kernel/ctrl_if.c, however, when I tried to ins= ert the module, I got the error message "unresolved symbol ctrl_if_send_message_block". Looks like the function is not exported. S= o I go to 2.6.9-sparse/arch/xen/kernel/ctrl_if.c to add the following line:

EXPORT_SYMBOL(ctrl_if_send_message_block);

But after compilation and reboot, I still got the same error message. C= an someone give me some advice on how to use xen provided functions?

You might want to tell the list if that's what helped.

Thanks a lot.

well HTH, Milan

Milan Holz=E4pfel alias jagdfalke alias jag

=D6ff GnuPG-Schl=FCssel <URL:http://con.mjh.name/> GnuPG Public Key GnuPG Fingerabdruck 4C8A 5FAF 5D32 6125 89D1 GnuPG Fingerprint 0CE5 DB0C AF4F 6583 7966

http://www.deppenleerzeichen.de/