Thanks Andrew! Another question: do you think it will be painful to add to OVMF an SMM support? As far as I know, QEMU supports SMM, so it may be possible... The question is: what is the cost?
Thomas 2014-04-02 10:25 GMT+02:00 Andrew Fish <[email protected]>: > > On Apr 1, 2014, at 11:47 PM, Lethom Legrand <[email protected]> wrote: > > > Hello everyone, > > > > I have to work on the SMM code of UEFI, in order to add some properties. > However, I do not have any hardware platform for an easy debug of my > modifications. At least, not for now. > > > > I am wondering if it could be a good idea to modify the Efi Shell first, > for some test, because it is much more easier to debug. As I understood it, > the SMM Drivers in UEFI are executed in a flat-protected mode, and it is > the same when UEFI boot on Efi Shell and the UEFI Applications it loads and > executes. Of course, there are differences (one is access to the SMRAM) but > as I said it's just to start. > > > > So, my question is: am I right? SMM code context and Efi Shell context > are similar? > > > > In general it is all C code and things are similar. The issue you have is > the Shell runs at boot services time. So your code as access to lots of > things that are not safe to use at SMM time. Also the entry point is quite > different for an SMM module. But as long as you don't use gBS and only use > library classes that have an instance that works in SMM you could make some > progress. > > Thanks, > > Andrew Fish > > > Thomas > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > edk2-devel mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/edk2-devel > > > > ------------------------------------------------------------------------------ > _______________________________________________ > edk2-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/edk2-devel >
------------------------------------------------------------------------------
_______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel
