XCODE5 doesn't support absolute addressing in the assembly code. This change uses lea instruction to get the address. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao <liming.gao@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>