[U-Boot] [PATCH 1/4] arm64: Add tool to statically apply RELA relocations

[FengHua]

> ARM64 uses the newer RELA-style relocations rather than the older REL.
> RELA relocations have an addend in the relocation struct, rather than
> expecting the loader to read a value from the location to be updated.
>
> While this is beneficial for ordinary program loading, it's problematic

How it is beneficial than rel format?
Why aarch64-gcc use rela format only instead of supporting two format?
these confuse me a few months.

David,