1 1 9.1.7 Mapping Symbols 1 --------------------- 1 1 The AArch64 ELF specification requires that special symbols be inserted 1 into object files to mark certain features: 1 1 '$x' 1 At the start of a region of code containing AArch64 instructions. 1 1 '$d' 1 At the start of a region of data. 1