[U-Boot] [PATCH] efi_loader: correctly apply relocations from the .reloc section

[Heinrich Schuchardt]

On 05/03/2018 01:36 AM, Ivan Gorinov wrote:
> Instead of difference between preferred and actual image base, the
> actual base is added to the fields specified in the .reloc section.
> 
> Use ImageBase from PE optional header to compute the delta,
> exit early if the image is loaded at the preferred address.
> 
> Signed-off-by: Ivan Gorinov <ivan.gorinov at intel.com>

The PE spec has this sentence:
"To apply a base relocation, the difference is calculated between the 
preferred base address and the base where the image is actually loaded."

The spec further defines ImageBase as "The preferred address of the 
first byte of image when loaded into memory."

EDK2 also calculates the relocations offset as:
BaseAddress - OptionalHeader.ImageBase
in MdePkg/Library/BasePeCoffLib/BasePeCoff.c and
in DuetPkg/EfiLdr/PeLoader.c

Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>