Hi,
I am trying to port edk2 to our ARM64 platform simulator and seeing
strange behaviour.
I see the content of FdtDevicePath is getting changed, after executing
the function
BdsLoadImage() to load the Linux Image file.
Because of this, when BdsLoadImage function is called to load the
fdt.dtb file, the execution goes in infinite loop.
After debugging, i am seeing that, it is happenig due to corrution of
FDT device path.
Before the BdsLoadImage() called to load Linux Image file,
the FDT device path(0xFBC8B918) content is valid, ie
DevicePathFdt->Type = 1.
DevicePathFdt ->SubType= 4.
DevicePathFdt->Lenght[0] = 20.
After the Linux Image is loaded, it is changes as below,
DevicePathFdt->Type = 112
DevicePathFdt ->SubType= 111
DevicePathFdt->Lenght[0] = 100
further debugging, i see this happening by below lines of code, in function
CoreLocateHandle(), MdeModulePkg/Core/Dxe/Hand/Locate.c
//
// Increase the resulting buffer size, and if this handle
// fits return it
//
ResultSize += sizeof(Handle);
if (ResultSize <= *BufferSize) {
*ResultBuffer = Handle; <= this line is corrupting the
devicepath of FDT.
ResultBuffer += 1;
}
}
Not able to understand what causing this corruption.
Any clue on what is going wrong?
Any suggestions for further debugging?
BTW, I am using edk2 source from
git://git.linaro.org/uefi/linaro-edk2.git, branch master
thanks
Ganapat
