Hi All,
I add a boot option for PXE boot, pointed to a network interface, and boot
from it successfully. If I update my firmware, flash into spi-nor device
and then try pxe boot again, fails.
If I now delete the old boot option in boot manager and add a new one, then
PXE boot works.
I have chased this down to a comparison in
MdeModulePkg/Core/Dxe/Hand/Locate.c and in function CoreLocateDevicePath,
the following comparison fails even though the device path strings look the
same.
----------------------------------------------------------------------------------------------------------------
if ((Size <= SourceSize) && CompareMem (SourcePath, TmpDevicePath,
(UINTN) Size) == 0) {
----------------------------------------------------------------------------------------------------------------
I used the device path to text protocol to print both paths and they look
the same but I am not sure why this comparison is failing.
Tmp Device Path
'PciRoot(0x2)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(123456789ABC,0x1)'
Source Device Path
'PciRoot(0x2)/Pci(0x2,0x0)/Pci(0x0,0x0)/MAC(123456789ABC,0x1)'
Any suggestions on how I can debug this ?
Thanx,
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