Hi,
On Fri, Jul 19, 2013 at 10:24 AM, Holger Goetz <address@hidden> wrote:
Yes it's towards the right direction. But it is 32bit only if i understand
correctly, and it basically is a memory access to fixed/hardcoded MEMORY
address (0x80000001). to pick the veondor id and machine info.
It's true that I've mostly been using the module on 32-bit virtual
machines, so it hasn't really been tested elsewhere. However, I'm not
sure I understand what you mean by the hard-coded memory address. The
first function grub_smbios_locate_eps searches for the SMBIOS entry
point structure as described in the spec. The table entries are then
read at the table address found in the EPS, not a hard-coded location.
I have only 64bit - UEFI here - therefore the approach w/ first searching
the SMBIOS infoblock in memory is probably required. And then properly walk
through the info-tables/blocks to get to the UUID entry. It doesn'T need to
be a fixed info to be retrieved from the SMBIOS memory - maybe a generic
function to query/search a specific entry and return that to be assigned to
a variable would be more flexible.
The module's command-line interface does use a (dumb) query/search
method. You can specify the desired entry's type and/or handle and
the data to retrieve from it. For example the following command
prints the machine name (i.e. the string at offset 5 in an entry with
type 1).
smbios -t 1 -s 5
I think you may have found the first patch I sent in that old thread,
which was for different functionality. The SMBIOS module can be
downloaded from the list archive[1].
Unfortunately it doesn't have any convenient functions to output a
usable UUID. It shouldn't take much to add one: the variable "entry"
in the "main" function is a pointer to the matched entry, so entry[8]
through entry[23] is the UUID in a call "smbios -t 1 ...". I've
verified these bytes correspond to dmidecode output on my physical
hardware with the following.
for i in 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
do smbios -t 1 -b $i
done
If the module isn't salvageable on UEFI, maybe I can send out an
updated version whenever I upgrade to such a system.
Thanks.
David
[1] https://lists.gnu.org/archive/html/grub-devel/2013-04/binx8am8MvVSh.bin