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OvmfPkg/OvmfXen: Creating an ELF header

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This patch changes the flash device image of OvmfXen to make it look
like it's an ELF. For this, we replace the empty embedded variable store
by a binary array, which is a ELF file header.

The ELF header explain to a loader to load the binary at the address
1MB, then jump to the PVH entry point which will be created in a later
patch. The header also includes a Xen ELF note that is part of the
PVH ABI.

That patch include OvmfXenElfHeaderGenerator.c which can be use to
regenerate the ELF header, but this will be a manual step.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-6-anthony.perard@citrix.com>
This commit is contained in:
Anthony PERARD
2019-08-13 12:30:49 +01:00
committed by Laszlo Ersek
parent 3b96221f77
commit 1e9d6b0f98
3 changed files with 239 additions and 3 deletions
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Maintainers.txt
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@@ -373,6 +373,7 @@ F: OvmfPkg/Library/XenConsoleSerialPortLib/
F: OvmfPkg/Library/XenHypercallLib/
F: OvmfPkg/Library/XenIoMmioLib/
F: OvmfPkg/OvmfXen.*
F: OvmfPkg/OvmfXenElfHeaderGenerator.c
F: OvmfPkg/PlatformPei/MemDetect.c
F: OvmfPkg/PlatformPei/Platform.*
F: OvmfPkg/PlatformPei/Xen.*