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This patch adds support of the stack-based LoongArch relocations throughout GRUB, including tools, dynamic linkage, and support for conversion of ELF relocations into PE ones. A stack machine is required to handle these per the spec [1] (see the R_LARCH_SOP types), of which a simple implementation is included. These relocations are produced by binutils 2.38 and 2.39, while the newer v2.00 relocs require more recent toolchain (binutils 2.40+ & gcc 13+, or LLVM 16+). GCC 13 has not been officially released as of early 2023, so support for v1.00 relocs are expected to stay relevant for a while. [1] https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_relocations Signed-off-by: Zhou Yang <zhouyang@loongson.cn> Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Signed-off-by: Wentao Guan <guanwentao@uniontech.com>