Re: OVMF related osstest failures on multiple branches

[Ian Campbell <ian.campbell@citrix.com>]

On Wed, 2016-01-06 at 12:35 +0000, Ian Campbell wrote:
> The fly in the ointment of this theory is that the Jessie upgrade doesn't
> seem to have broken unstable in this way, for some reason, which is what I
> intend to investigate first.

One difference between all the failing versions and xen-unstable is that
unstable has a newer OVMF 52a99493cce8 (works) vs cb9a7ebabcd6 (fails).

It's possible there is a fix in there which would explain this, but its a
lot of commits to trawl through.

That said, one did stand out (below). A hang would correlate with a
complete lack of output (serial, vga) in the failure case (e.g. the 4.6-
testing one at [0]). Jessie is GCC49.

Next step is I'm trying 4.6-testing with the newer OVMF to see if this is
worth pursuing.

Ian.

[0] http://logs.test-lab.xenproject.org/osstest/logs/76950/test-amd64-amd64-xl-qemuu-ovmf-amd64/info.html)

Ian.


commit 55e96f9c601781b8dc52c40747922f6ca3521f9e
Author: Ruiyu Ni <ruiyu.ni@intel.com>
Date:   Thu Jul 9 08:55:23 2015 +0000

    OvmfPkg: Fix GCC49 build hang in PeiCore
    
    PeiCore hang when loads a PEIM whose section alignment requirement is 0x40
    but the actual base address is 0x20 aligned.
    
    The issue is caused by the following facts, in order:
    
    1. GCC49 requires the section alignment of .data to be 0x40. So a new link
       script gcc4.9-ld-script was added for GCC49 to specify the 0x40
       alignment.
    
    2. GenFw tool was enhanced to sync ELF's section alignment to PE header.
       Before the enhancement, the section alignment of converted PE image
       always equals to 0x20.
    
    If only with #1 change, GCC49 build image won't hang in PeiCore because
    the converted PE image still claims 0x20 section alignment which is
    aligned to the align setting set in FDF file. But later with #2 change,
    the converted PE image starts to claims 0x40 section alignment, while
    build tool still puts the PEIM in 0x20 aligned address, resulting the
    PeCoffLoaderLoadImage() reports IMAGE_ERROR_INVALID_SECTION_ALIGNMENT
    error.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
    Reviewed-by: Liming Gao <liming.gao@intel.com>
    Reviewed-by: Laszlo Ersek <lersek@redhat.com>
    
    git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17902 6f19259b-4bc3-4df7-8a09-765794883524


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