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6d73863b54
The AArch64 ABI classifies register x18 as a platform register, which means it should not be used unless the code is guaranteed to run on a platform that doesn't use it in such a capacity. GCC does not honour this requirement by default, and so we need to tell it not to touch it explicitly, by passing the -ffixed-x18 command line option. Link: https://bugzilla.tianocore.org/show_bug.cgi?id=625 Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>